NIHON DEMPA KOGYO CO., LTD. Patent applications |
Patent application number | Title | Published |
20140368089 | PIEZOELECTRIC VIBRATING PIECE, PIEZOELECTRIC DEVICE, AND METHOD FOR FABRICATING THE PIEZOELECTRIC DEVICE - A piezoelectric vibrating piece includes an excitation electrode and an extraction electrode. The excitation electrode is formed in a vibrating portion. The extraction electrode is extracted from the excitation electrode to one side portion. The piezoelectric vibrating piece includes a front surface and a back surface. At least one of the front surface and the back surface includes an index mark formed in a region. The region includes at least a part of a side portion on an opposite side of the one side portion. The region allows application of an adhesive. | 12-18-2014 |
20140361665 | QUARTZ CRYSTAL DEVICE AND METHOD FOR FABRICATING THE SAME - A surface mount type quartz crystal device includes a quartz crystal vibrating piece and a base plate. The quartz crystal vibrating piece is configured to vibrate at a predetermined frequency. The base plate is made of a crystal or a glass. The base plate includes an external electrode disposed on a bottom surface of the base plate to mount the quartz crystal device. The quartz crystal vibrating piece is placed on an opposite surface of the bottom face. The external electrode includes a metal film formed on a surface of the base plate by sputtering, and an electroless plating film formed on a surface of the metal film by electroless plating. The electroless plating film includes a nickel layer including lead and bismuth. | 12-11-2014 |
20140348282 | OSCILLATION DEVICE AND COMMUNICATION SYSTEM - An oscillation device includes a voltage control oscillation unit, a dividing unit, an output phase comparison unit, and a control voltage supply unit. The voltage control oscillation unit is configured to oscillate an oscillation frequency signal with a frequency f1 according to a control voltage. The dividing unit is configured to divide the frequency of the oscillation frequency signal into 1/N (N is a natural number) to match with a frequency f2 of a reference frequency signal input from outside. The output phase comparison unit is configured to compare a phase of the divided oscillation frequency signal with a phase of the reference frequency signal and output a signal according to a phase difference. The control voltage supply unit is configured to generate a control voltage according to the signal according to the phase difference and supply the control voltage to the voltage control oscillation unit. | 11-27-2014 |
20140320225 | BONDING TYPE CRYSTAL CONTROLLED OSCILLATOR - A bonding type crystal controlled oscillator includes a crystal package and a circuit package bonded by two-tier bonding. An anisotropy conductive adhesive is interposed between back surface of the crystal package facing the circuit package and an upper surface of the circuit package facing the crystal package. The anisotropy conductive adhesive includes a thermosetting resin containing solder micro particles dispersed in the thermosetting resin. Assuming that a thickness of the output terminal formed at the crystal package is C μm, a thickness of the external terminal formed at the circuit package is D μm, and an average outside diameter of the solder micro particles dispersed in the anisotropy conductive adhesive is E μm the dimensional relation is set to (C+D)>E. | 10-30-2014 |
20140320110 | MEASURING APPARATUS, MEASURING METHOD, AND MEASURING PROGRAM - A measuring apparatus for measuring a characteristic of a crystal unit includes an input unit, a measuring unit, a storage unit, and a calibrating unit. The input unit is configured to input a measurement signal into the crystal unit. The measuring unit is configured to measure the characteristic of the crystal unit based on an output signal output from the crystal unit with respect to the measurement signal. The storage unit is configured to associate calibration data with a measuring condition to measure the characteristic of the crystal unit, and store the associated data. The calibration data is generated based on a measurement result measured by the measuring unit with connecting a short-circuit element instead of the crystal unit. The calibrating unit is configured to calibrate the characteristic of the crystal unit measured by the measuring unit based on the calibration data. | 10-30-2014 |
20140313682 | COMPOSITE ELECTRONIC COMPONENT - A composite electronic component includes a metal component with a wide surface terminal, a printed circuit board with a wide surface mounting pad; and a plurality of small area solder films partitioned into small sectioned regions. The small sectioned regions are sectioned by grid-shaped solder resist banks on the wide surface mounting pad. A cream solder is applied on the individual small sectioned regions to form the plurality of small area solder films. The grid-shaped solder resist bank has a width configured to: reduce a bubble that occurs in the sectioned region at one side of the grid-shaped solder resist bank from merging with a bubble that occurs in the sectioned region at another side of the grid-shaped solder resist bank; and act as an escaping route for a bubble that occur in the small area solder film. | 10-23-2014 |
20140312984 | OSCILLATOR CIRCUIT - An oscillator circuit includes a first resonator, a second resonator, and a frequency adjusting unit. The second resonator has a frequency characteristic different from a frequency characteristic of the first resonator. The frequency adjusting unit is configured to change a ratio between a contribution of the first resonator and a contribution of the second resonator so as to adjust an output frequency. | 10-23-2014 |
20140297056 | TEMPERATURE CONTROLLER - A temperature controller for controlling a temperature of a heated body heated by a heater to a target temperature. The temperature controller includes a temperature detection unit, a difference computation unit, a controller, a comparison unit, an abnormal event detection unit, and a power feeding stopping unit. The abnormal event detection unit is configured to output a second signal that is an abnormal event detection signal when the first signal continues to be output for a period of time exceeding a pre-set period of time. The power feeding stopping unit is configured to stop power feeding to the heater when the second signal is output. The power feeding amount to the heater is controlled based on the manipulated variable computed by the controller. | 10-02-2014 |
20140292444 | ELASTIC WAVE FILTER - An elastic wave filter includes an electrode finger group in an input side electrode and an electrode finger group in output side electrode each disposed in a taper shape such that elastic waves with mutually different wavelengths propagate on a piezoelectric substrate across from a track Tr | 10-02-2014 |
20140292424 | PIECE-CRYSTAL OSCILLATOR AND OSCILLATION DEVICE - A crystal oscillator includes: an oscillation circuit; first and second oscillation circuits connected to first and second temperature detection crystal units, respectively; a heating portion configured to constantly maintain an ambient temperature; a frequency difference detection portion that obtains, as a temperature detection value, “{(f | 10-02-2014 |
20140292416 | OSCILLATOR - An oscillator configured to obtain a frequency output corresponding to a frequency setting value includes: an oscillation circuit portion that receives the frequency setting value; a setting value output portion that outputs a digital value for designating the frequency setting value; an interpolation circuit portion that performs interpolation for a digital value of lower-order bits out of the digital value output from the setting value output portion; and an adder that adds an output of the interpolation circuit portion and a digital value of higher-order bits out of the digital value output from the setting value output portion, wherein a signal output from the interpolation circuit portion is sequential data having first and second values different from each other, and output counts of the first and second values are determined based on a ratio corresponding to the digital value of the lower-order bits. | 10-02-2014 |
20140292143 | ELECTRONIC DEVICE AND METHOD FOR FABRICATING THE SAME - The disclosure provides an electronic device that includes a substrate and a lid. The lid is bonded on the substrate to seal an inside of the lid using a resin. The lid includes a contact surface in contact with the resin. The contact surface includes a rough surface with an uneven shape. | 10-02-2014 |
20140291538 | STEP UP CIRCUIT AND RADIATION METER - A step-up circuit includes a transistor configured to perform switching operation in response to a pulse signal input into a base of the transistor, an inductor disposed between a collector of the transistor and a power source, and a basic step-up circuit connected to a connecting point of the collector of the transistor and the inductor. The basic step-up circuit includes: a first diode, a second diode whose anode is connected to a cathode of the first diode, a third diode whose anode is connected to a cathode of the second diode, a first capacitor disposed between the cathode of the first diode and ground, a second capacitor disposed between an anode of the first diode and the cathode of the second diode, and a third capacitor disposed between a cathode of the third diode and the ground. | 10-02-2014 |
20140291011 | ELECTRONIC DEVICE AND METHOD FOR FABRICATING THE SAME - An electronic device includes a substrate and a lid bonded on the substrate with a resin layer to seal an inside of the lid. The resin layer is formed at a part of the substrate to which the lid is mounted. A part where the lid is bonded on the substrate with resin layer forms a sealing portion. A glass layer is formed so as to cover the sealing portion. | 10-02-2014 |
20140290019 | METHOD FOR FABRICATING VIBRATOR - A method for fabricating a vibrator with a vibrating plate and an electrode for vibrating the vibrating plate includes laminating, forming, filling-in, patterning, subsequently laminating, and subsequently etching. The forming forms a through hole that passes through a conductive film and a second sacrifice film and reaches at least a middle portion in a film thickness direction of a first sacrifice film. The filling-in fills in an auxiliary film for adjusting temperature characteristics including silicon and oxygen from a lower end position to an upper end position of the through hole. The subsequently etching etchs an upper end portion of the auxiliary film, a lower end portion of the auxiliary film, the first sacrifice film, the second sacrifice film, and a third sacrifice film, while leaving the auxiliary film inside the through hole on the vibrating plate, with a use of an etching fluid including hydrogen fluoride. | 10-02-2014 |
20140285275 | OSCILLATOR - An oscillator that can suppress a solder crack caused by a temperature change by a simple structure at low cost and improve heat cycle resistance performance is provided. The oscillator includes an epoxy resin board and an electronic component mounted on the board. Two-terminal electrode patterns are formed on the board, and connected to terminal electrodes of the electronic component by solder. A projection is formed on each of the electrode patterns at a part connected to a corresponding terminal electrode to create a space between the terminal electrode and the electrode pattern, and the solder forms a fillet in the space. This contributes to enhanced adhesion strength of the solder. | 09-25-2014 |
20140266482 | NEGATIVE CAPACITANCE CIRCUIT, RESONANCE CIRCUIT AND OSCILLATOR CIRCUIT - A resonance circuit includes a first resonator, a second resonator, a capacitance element and an inverting amplifier, and a negative capacitance circuit. The second resonator is connected to the first resonator in series. The capacitance element and the inverting amplifier are connected to one another in series. The capacitance element and the inverting amplifier are connected to the first resonator in parallel. The negative capacitance circuit is connected between a node and ground. The node is disposed between the first resonator and the second resonator. | 09-18-2014 |
20140265735 | PIEZOELECTRIC VIBRATING PIECE AND PIEZOELECTRIC DEVICE - A piezoelectric vibrating piece includes a vibrator, a framing portion that surrounds the vibrator, a connecting portion that connects the vibrator and the framing portion, an excitation electrode on each of a front surface and a back surface of the vibrator, and a first extraction electrode and a second extraction electrode on the framing portion. The first extraction electrode and the second extraction electrode are electrically connected to the respective excitation electrodes. The piezoelectric vibrating piece includes a front surface and a back surface. A stepped portion is disposed on at least one of the front surface and the back surface of the piezoelectric vibrating piece. In a case where one of the first extraction electrode and the second extraction electrode is disposed across the stepped portion, another one of the first extraction electrode and the second extraction electrode is disposed to avoid crossing over the stepped portion. | 09-18-2014 |
20140253252 | OSCILLATOR CIRCUIT - An oscillator circuit includes a crystal unit, a first variable capacitance element, a transistor, and a first capacitance element. The first variable capacitance element is disposed between a first terminal of the crystal unit and a ground. The transistor has a base connected to a second terminal of the crystal unit. The first capacitance element is disposed between an emitter and a collector of the transistor. | 09-11-2014 |
20140252919 | PIEZOELECTRIC DEVICE - A piezoelectric device includes a piezoelectric vibrating piece, a lid portion, and a base portion. The piezoelectric vibrating piece includes a vibrating portion, a framing portion surrounding the vibrating portion, an excitation electrode on the vibrating portion, and an extraction electrode on the framing portion. The extraction electrode is electrically connected to the excitation electrode. The lid portion is bonded to a front surface of the piezoelectric vibrating piece. The base portion is bonded to a back surface of the piezoelectric vibrating piece. The base portion includes an external electrode electrically connected to the extraction electrodes. The framing portion includes a metallic layer that allows a passivation. The metallic layer is disposed at an outer peripheral edge portion corresponding to the extraction electrode on at least one of a front surface and a back surface. | 09-11-2014 |
20140250985 | SENSING SENSOR AND SENSING DEVICE USING PIEZOELECTRIC RESONATOR - A sensing sensor includes a crystal element having a first excitation electrode, a second excitation electrode, and a common electrode, an adsorbing layer, a wiring board, and a channel forming member. The crystal element is secured to the wiring board so as to form a space at one surface side of the first vibrating region and the second vibrating region. The channel forming member is disposed to form a supply channel of sample solution upward of each of the first vibrating region and the second vibrating region. The channel forming member is disposed such that an inferior surface of a left edge and a right edge of the channel forming member is positioned on the common electrode. The channel forming member is formed such that an injection port of the sample solution and a discharge port of the sample solution are opposed to the crystal element. | 09-11-2014 |
20140250647 | METHOD FOR FABRICATING PIEZOELECTRIC DEVICE - A method for fabricating a piezoelectric device that includes a piezoelectric resonator to be mounted on a solder applied over a surface of a substrate. The piezoelectric resonator includes a metal case and at least a pair of lead terminals extracted from the metal case. The lead terminal includes a first part, a second part, and a third part. The method includes: applying solder cream at a case region and a lead region of a surface of the substrate, the case region corresponding to the metal case, the lead region corresponding to the third part; placing a block solder with a smaller area than an area of the case region at the case region; arranging the metal case of the piezoelectric resonator to the case region, arranging the third part to the lead region; and heating the substrate and the piezoelectric resonator in a reflow furnace. | 09-11-2014 |
20140218121 | SURFACE MOUNT DEVICE-TYPE LOW-PROFILE OSCILLATOR - A surface mount device-type low-profile oscillator is provided. A main surface of an IC chip unit is joined to a bottom surface where the external terminals of a crystal unit section are formed. An integrated circuit portion includes a circuit forming, together with the crystal unit of the crystal unit section, an oscillator circuit on the main surface of the IC chip unit, and IC terminals formed with a plurality of IC electrode terminals, and two connection terminals connecting the external terminals of the crystal unit section are provided. The IC electrode terminals and mounting terminals are electrically connected with electrical columns provided in via holes penetrating in the direction of thickness of a silicon plate of a bare chip. The crystal unit section and the IC chip unit are joined with an anisotropic conductive adhesive applied to the main surface of the IC chip unit. | 08-07-2014 |
20140210567 | CRYSTAL RESONATOR, CRYSTAL RESONATOR PACKAGE, AND OSCILLATOR - A crystal resonator includes a plate-shaped crystal element, excitation electrodes, and a second crystal region. The plate-shaped crystal element is supported to a supporting portion. The crystal element is configured to vibrate at a thickness shear vibration. The excitation electrodes are disposed at both surfaces of a first crystal region of the crystal element. The second crystal region is positioned outside with respect to the excitation electrodes. The second crystal region is formed at a peripheral edge portion of the crystal element so as to occupy a region of equal to or more than 75% of a whole circumference of the crystal element. The second crystal region has a positive/negative direction of an X-axis of a crystal different from a positive/negative direction of an X-axis of a crystal of the first crystal region. | 07-31-2014 |
20140210566 | CRYSTAL RESONATOR, CRYSTAL RESONATOR PACKAGE, AND CRYSTAL OSCILLATOR - A crystal resonator includes a crystal element and excitation electrodes. The crystal element includes an α crystal region and a β crystal region that have mutually different positive/negative directions along an X-axis. Each two or more of the α crystal regions and the β crystal regions are alternately formed along a direction perpendicular to the X-axis. The excitation electrodes are formed on both surfaces of the respective α crystal region and β crystal region other than crystal regions positioned at both end portions of a row of the α crystal regions and the β crystal regions. | 07-31-2014 |
20140210563 | CRYSTAL CONTROLLED OSCILLATOR AND OSCILLATING DEVICE - A crystal controlled oscillator of the present disclosure includes: an oscillator circuit for oscillator output, a first oscillator circuit, a second oscillator circuit, a heating unit, a pulse generator, a frequency difference detector, an addition unit, a circuit unit, a frequency measuring unit, a determination unit, and a signal selector. The signal selector is configured to: select a control signal where electric power supplied to the heating unit is smaller than supplied electric power in the detection range in a case where a frequency in a set period at the train of pulses is out of the detection range at the high temperature side; select a control signal where electric power supplied to the heating unit becomes a preset value in a case where a frequency in the set period at the train of pulses is out of the detection range at the low temperature side. | 07-31-2014 |
20140203883 | RESONATOR, OSCILLATOR, AND METHOD FOR FABRICATING OSCILLATOR - A resonator includes a ring-shaped or disk-shaped resonator main body, a supporting joist, and a securing portion. The supporting joist extends from the resonator main body to support the resonator main body. The securing portion is formed at a distal end of the supporting joist and the securing portion is secured to a base material. The securing portion includes a first rod-shaped portion and a second rod-shaped portion. The first rod-shaped portion is formed in a first direction. The second rod-shaped portion is formed in a second direction different from the first direction. | 07-24-2014 |
20140175944 | CRYSTAL RESONATOR - A crystal resonator includes a mesa-type crystal element, a pair of excitation electrodes, and a deformed portion. The mesa-type crystal element has a principal surface portion and a peripheral edge portion. The peripheral edge portion surrounds the principal surface portion and has a smaller thickness than the principal surface portion. The pair of excitation electrodes are formed at the principal surface portion on one surface side and the principal surface portion on an other surface side of the crystal element, respectively. The deformed portion is configured to reduce a vibration different from a main vibration and confine energy to the principal surface portion. | 06-26-2014 |
20140165382 | METHOD FOR DETECTING REGION OF CRYSTAL ELEMENT, METHOD FOR FABRICATING CRYSTAL RESONATOR, AND METHOD FOR FABRICATING OSCILLATOR - A method for detecting a boundary region between a first region and a second region, which have mutually different positive/negative X-axis direction, formed on a common crystal element includes: supporting the crystal element to a supporting portion; subsequently, obtaining an electrical characteristic value of each divided region by applying an electric signal to each of a plurality of divided regions using a pair of electrodes connected to an oscillator circuit, the plurality of divided regions being formed by dividing the crystal element into a plurality of regions in a surface direction, the pair of electrodes being arranged so as to mutually face via the crystal element in a thickness direction; and outputting information to recognize the boundary between the first region and the second region based on information where location information and the electrical characteristic values of each of the divided regions are linked. | 06-19-2014 |
20140159821 | OSCILLATION APPARATUS - An oscillation apparatus corrects a setting value for an output frequency based on a detection result of an environmental temperature. The oscillation apparatus includes a first crystal unit, a second crystal unit, an integrated circuit chip, and a container. The first crystal unit includes first excitation electrodes on respective surfaces of a crystal element. The second crystal unit includes second excitation electrodes on respective surfaces of a crystal element. The integrated circuit chip includes a first oscillation circuit, a second oscillation circuit, and a correction unit. The container houses the first crystal unit, the second crystal unit, and the integrated circuit chip. Assuming that distances from a gravity center position of the integrated circuit chip to respective gravity center positions of the first excitation electrodes and the second excitation electrodes in plan view are denoted by D1 and D2, D1/D2 is within a predetermined range close to 1. | 06-12-2014 |
20140139073 | PIEZOELECTRIC DEVICE - A piezoelectric device includes a piezoelectric vibrating piece, a lid portion, and a base portion. The piezoelectric vibrating piece includes: a vibrating portion; a framing portion surrounding the vibrating portion; an excitation electrode in the vibrating portion; and an extraction electrode electrically connected to the excitation electrode in the framing portion. The lid portion is bonded to a front surface of the piezoelectric vibrating piece via a bonding material. The base portion includes an external electrode bonded to a back surface of the piezoelectric vibrating piece via a bonding material and electrically connected to the extraction electrode. The excitation electrode and the extraction electrode each include: a foundation film formed of metal to be rendered passive; and a first metal film and a second metal film laminated to the foundation film. The foundation film has a film thickness of 1.0 nm to 8.0 nm. | 05-22-2014 |
20140132368 | PIEZOELECTRIC COMPONENT - A piezoelectric component includes a piezoelectric element that includes: a piezoelectric plate; a comb-shaped electrode and an input/output electrode on a principal surface of the piezoelectric plate; a cover layer disposed above the comb-shaped electrode; and a rib to form a void between the comb-shaped electrode and the cover layer. The cover layer includes a photosensitive thermosetting resin in which translucent filler is contained. | 05-15-2014 |
20140132361 | HEATER DEVICE AND OSCILLATION APPARATUS - A heater device includes a temperature detector, a heater control circuit, a heater, a voltage supply path, and an overheat prevention circuit. The overheat prevention circuit includes a positive-temperature-coefficient thermistor and a pull-up resistor. The positive-temperature-coefficient thermistor is interposed on the voltage supply path in a position for being heated by the heater. The pull-up resistor that includes: one end connected between the heater and the positive-temperature-coefficient thermistor, and another end connected to a direct current power source. The control voltage to be applied to the heater is restricted to a voltage at a connection point between the positive-temperature-coefficient thermistor and the pull-up resistor when the control voltage from the heater control circuit is abnormally decreased. | 05-15-2014 |
20140125422 | SELF-OSCILLATION CIRCUIT - A self-oscillation circuit includes an oscillating unit, an amplifying unit, and a resonator. The oscillating unit is configured to self-oscillate. The amplifying unit is configured to amplify a frequency signal oscillated at the oscillating unit and to feed back the amplified frequency signal to the oscillating unit. The resonator is disposed in an oscillation loop that includes the oscillating unit and the amplifying unit. The resonator has a resonant frequency near an oscillation frequency of the oscillating unit and has a higher Q-value than a Q-value of the oscillating unit. | 05-08-2014 |
20140104011 | PIEZOELECTRIC OSCILLATOR - Provided is a piezoelectric oscillator to attain high-frequency performance and frequency stabilization with the use of reflection characteristics of a reflective element. A piezoelectric oscillator is configured such that a resonant circuit is connected to a gate of a field effect transistor; an output terminal is connected to a drain and a power supply voltage V is applied to the drain; a piezoelectric resonator is connected to a source, as a reflective element; and a resonance frequency of the resonant circuit and an oscillation frequency of the piezoelectric resonator as a reflective element are set to substantially the same frequency, and further, the piezoelectric oscillator may be configured such that a first matching circuit is provided between the resonant circuit and the gate, second matching circuit is provided between the drain and the output terminal, and a third matching circuit is provided between the source and the reflective element. | 04-17-2014 |
20140091676 | CRYSTAL UNIT - A crystal unit according to this disclosure includes an IT-cut round crystal element supported at two points on an outer periphery portion of the IT-cut round crystal element. A rotation angle in plane between a straight line connecting the two points and Z″ axis of a double-rotation is within a specific range. The specific range includes an angle where an amount of frequency variation is zero. | 04-03-2014 |
20140085015 | OSCILLATION DEVICE - An oscillation device is provided. The oscillation device includes: a main circuit portion, a heating unit, first and second crystal units, first and second oscillator circuits, a frequency difference detector, a first addition unit, an integration circuit unit, a circuit unit configured to control an electric power to be supplied to the heating unit, a compensation value obtaining unit, and a second addition unit. The compensation value obtaining unit is configured to obtain a frequency compensation value for compensating an output frequency of the main circuit portion based on an integrated value output from the integration circuit unit, and based on a change in the clock signal due to a difference between the temperature of the atmosphere and the temperature setting value of the heating unit. The second addition unit is configured to add the frequency compensation value to a frequency setting value. | 03-27-2014 |
20140077844 | SIGNAL LEVEL ADJUSTING DEVICE AND HIGH-FREQUENCY APPARATUS - To provide, in a frequency synthesizer including: a variable attenuator provided at a subsequent stage of a voltage controlled oscillator; a detector; and a control unit outputting a control voltage for adjusting an attenuation amount of the variable attenuator via a digital/analog converter in accordance with a detection voltage, a technology with which a spurious due to a change in an output of the digital/analog converter can be suppressed. A low-pass filter is provided between an output side of a digital/analog converter and a variable attenuator to cut a frequency component corresponding to an overshoot generated when an output of the digital/analog converter is changed. Further, a period of time from when a control unit outputs a control voltage to when it reads a signal level detected by a detector is set to a period of time longer than a time constant of the low-pass filter determined by a cut-off frequency of the low-pass filter so that no influence is exerted on an operation of automatically controlling the signal level. | 03-20-2014 |
20140062258 | EXTERNAL FORCE DETECTION EQUIPMENT AND EXTERNAL FORCE DETECTION SENSOR - External force detection equipment according to the present disclosure includes a container, a supporting portion, one excitation electrode, another excitation electrode, an oscillation circuit, a movable electrode, a fixed electrode, a frequency information detecting unit, and a conductor. An oscillation loop is formed from the oscillation circuit to pass through the one excitation electrode, the other excitation electrode, the movable electrode, and the fixed electrode, and return to the oscillation circuit. The frequency information detected by the frequency information detecting unit is used for estimating an external force acting on the piezoelectric plate. | 03-06-2014 |
20140042874 | PIEZOELECTRIC VIBRATING PIECE AND PIEZOELECTRIC DEVICE - A piezoelectric vibrating piece includes a vibrator, a framing portion, a connecting portion, and an extraction electrode. The vibrator includes excitation electrodes formed on both principal surfaces. The framing portion includes an inner peripheral side facing the vibrator and an outer peripheral side on an opposite side of the inner peripheral side. The framing portion has a predetermined width from the inner peripheral side to the outer peripheral side. The connecting portion connects the vibrator and the framing portion. The extraction electrode is extracted from the excitation electrode to the framing portion via the connecting portion. The extraction electrode contacts the inner peripheral side and the outer peripheral side of the framing portion. The extraction electrode includes an end side that connects the inner peripheral side and the outer peripheral side of the extraction electrode. All of the end side is longer than the predetermined width. | 02-13-2014 |
20140041454 | PIEZOELECTRIC RESONATOR, ETCHING AMOUNT DETECTING DEVICE, AND OSCILLATOR - A piezoelectric resonator includes a plate-shaped crystal element, excitation electrodes, and an unwanted response suppression portion. The excitation electrodes are disposed on both surfaces of the crystal element. The unwanted response suppression portion is formed by inverting a crystallographic axis of the crystal element to suppress an unwanted response that oscillates at a different frequency from a frequency of a main vibration of the crystal element. | 02-13-2014 |
20130320809 | PIEZOELECTRIC VIBRATING PIECE AND PIEZOELECTRIC DEVICE - A piezoelectric vibrating piece includes a rectangular vibrator, a framing portion, a connecting portion, and a protrusion. The rectangular vibrator vibrates at a predetermined vibration frequency. The framing portion surrounds a peripheral area of the vibrator. The framing portion includes an inner side surface facing the vibrator. The connecting portion connects the vibrator and the framing portion. The protrusion protrudes to the vibrator side. The protrusion is formed on at least one of the inner side surface facing a side of the vibrator where the connecting portion is connected and the inner side surface adjacent to the connecting portion. | 12-05-2013 |
20130293312 | OSCILLATOR - An oscillator outputs a control signal to suppress an influence caused by temperature characteristic of f | 11-07-2013 |
20130278358 | ELASTIC WAVE FILTER - An elastic wave filter includes electrode fingers, a first busbar and a second busbar, and inclined electrode portions each having a narrower distance between the electrode fingers from the first busbar toward the second busbar. The elastic wave filter includes a dummy electrode disposed in at least one of the input-side IDT electrode portion and the output-side IDT electrode portion to suppress reflection of a diffracted elastic wave by the busbar and to suppress spurious response at an end portion in a frequency pass-band. The dummy electrode has a width dimension and a pitch that are determined such that none of a period shorter than a shortest period of the electrode fingers and a period longer than a longest period of the electrode fingers is satisfied. | 10-24-2013 |
20130278114 | PIEZOELECTRIC DEVICE AND METHOD FOR FABRICATING THE SAME - A surface mount piezoelectric device includes a piezoelectric vibrating piece, a base plate, and a lid plate. The piezoelectric vibrating piece includes a vibrating portion. The base plate has one principal surface that includes a pair of mounting terminals and another principal surface where the piezoelectric vibrating piece is placed. The mounting terminals include a metal film formed by sputtering or vacuum evaporation and electroless plating film formed on a surface of the metal film. The lid plate has one principal surface that includes a metal film and an electroless plating film formed on a surface of the metal film by electroless plating and another principal surface seals the vibrating portion. The electroless plating film formed on the one principal surface of the base plate and the electroless plating film formed on the one principal surface of the lid plate have mutually a same shape and a same area. | 10-24-2013 |
20130264910 | PIEZOELECTRIC DEVICE - A surface mount piezoelectric device with a piezoelectric vibrating piece to be mounted on a surface of a printed circuit board includes a base substrate, a groove, and at least a pair of mounting terminals. The base substrate is formed of an insulating material. The base substrate includes a mounting surface to be mounted on the printed circuit board. The groove is formed on at least a part of a periphery of the mounting terminal. The groove has a bottom surface and a side surface. The side surface extends from the bottom surface to the mounting surface. The pair of mounting terminals are formed on the mounting surface and the side surface. | 10-10-2013 |
20130257549 | CRYSTAL CONTROLLED OSCILLATOR - A crystal controlled oscillator includes a crystal package and an IC chip board that includes an IC chip integrating an oscillator circuit. The crystal package includes a first container, a crystal resonator, a lid body, and an external terminal at an outer bottom surface of the first bottom wall layer of the first container. The IC chip integrates an oscillator circuit disposed at an outer bottom surface of the first bottom wall layer of the crystal package. The oscillator circuit connects to the lower side excitation electrode of the crystal resonator from the external terminal to an input side with high impedance. The oscillator circuit connects to the upper side excitation electrode to an output side with low impedance. The upper side excitation electrode is a shielding electrode of the crystal resonator. | 10-03-2013 |
20130255402 | EXTERNAL FORCE DETECTION SENSOR AND EXTERNAL FORCE DETECTION EQUIPMENT - An external force detection sensor includes a piezoelectric piece, excitation electrodes, an oscillation circuit, a movable electrode, and a fixed electrode. The fixed electrode forms variable capacitance with variation in capacitance between the fixed electrode and the movable electrode that is caused by deflection of the piezoelectric piece. The piezoelectric piece, the excitation electrode, the movable electrode, and the fixed electrode constitute combinations of a first combination and a second combination. The first combination constitutes a first sensor unit by disposing a first piezoelectric piece on a first crystal plane of the crystalline body. The second combination constitutes a second sensor unit by disposing a second piezoelectric piece on a second crystal plane. The second crystal plane does not opposite to the first crystal plane of the crystalline body. A relative position of the second crystal plane with respect to the first crystal plane is obtained. | 10-03-2013 |
20130249641 | OSCILLATOR CIRCUIT - The oscillator circuit | 09-26-2013 |
20130241362 | PIEZOELECTRIC DEVICE - A piezoelectric device includes a piezoelectric vibrating piece and a base portion in a square shape with four sides viewed from the first surface. The base portion has two sides that face one another. The two sides include two pairs of castellations depressed toward a center side of the base portion and two pairs of side surface electrodes on the two pairs of castellations. The two pairs of side surface electrodes connect the first surface and the second surface. One pair among the two pairs of side surface electrodes connects to the pair of connecting electrodes and one pair of mounting terminals among the two pairs of mounting terminals. The mounting terminals are formed up to four corners of the base portion. | 09-19-2013 |
20130241358 | QUARTZ CRYSTAL DEVICE AND METHOD FOR FABRICATING THE SAME - A method for fabricating a quartz crystal device includes forming a corrosion-resistant film on a first surface and a second surface of the base wafer, forming and exposing a photoresist on the corrosion-resistant film, etching the corrosion-resistant film, and performing wet-etching on through holes. The through hole has, at a +X-axis side, a first inclined surface, a second inclined surface, and a first top formed at an intersection of the first and second inclined surface, and has, at a −X-axis side, a third inclined surface, a fourth inclined surface, and a second top connecting the third and fourth inclined surfaces. The exposing exposes the first and second surfaces such that a distance from a center in the X-axis direction to the first top becomes equal to a distance from the center to the second top in the base plate. | 09-19-2013 |
20130241357 | PIEZOELECTRIC DEVICE AND METHOD FOR FABRICATING THE SAME - A piezoelectric device includes a piezoelectric vibrating piece, a base plate, and a lid plate. The base plate includes one principal surface where the piezoelectric vibrating piece is placed and includes a connecting electrode electrically connected to the extraction electrode, and another principal surface including a mounting terminal. The lid plate seals the vibrator. The lid plate seals the vibrator. At least a part of the mounting terminal includes a first metal film, a second metal film, and an electroless plating film. The second metal film is formed to cover the first metal film or is formed at a part of a surface of the first metal film. The second metal film has a different area from the first metal film. The electroless plating film is formed at least on a surface of the second metal film by electroless plating. | 09-19-2013 |
20130214650 | PIEZOELECTRIC DEVICE AND METHOD FOR FABRICATING THE SAME - A piezoelectric device includes a piezoelectric vibrating piece, a base plate, which has a connecting electrode on one principal surface and a mounting terminal on another principal surface, in a rectangular shape, and a lid plate. The another principal surface of the base plate includes a pair of sides that face one another. At least the pair of sides has a level difference portion depressed toward the one principal surface side and a castellation passing through from the another principal surface to the one principal surface. A wiring electrode extracted from the mounting terminal to the one principal surface of the base plate is at a part of the level difference portion and the castellation. The wiring electrode and the mounting terminal include a metal film formed by sputtering or vacuum evaporation and an electroless plating film formed on the metal film by electroless plating. | 08-22-2013 |
20130214649 | METHOD FOR FABRICATING PIEZOELECTRIC DEVICE AND PIEZOELECTRIC DEVICE - A method for fabricating a piezoelectric device includes preparing a piezoelectric wafer, preparing a first wafer, bonding the piezoelectric wafer and the first wafer, preparing a first terminal mask for forming a pair of hot terminals on the bottom surface and a second terminal mask for forming the pair of hot terminals and a grounding terminal as a ground point, selecting an arrangement of the first terminal mask and an arrangement of the second terminal mask on a bottom surface of the first wafer after the wafer bonding, and forming a bottom surface with the power supply terminal and the output terminal through the first terminal mask, or a bottom surface with the power supply terminal, the output terminal, and the grounding terminal through the second terminal mask, after selecting the arrangement. | 08-22-2013 |
20130214648 | PIEZOELECTRIC VIBRATION ELEMENT AND PIEZOELECTRIC DEVICE - A piezoelectric vibration element includes a piezoelectric piece, a pair of excitation electrodes, and a pair of extraction electrodes. The piezoelectric piece has a rectangular shape with long sides and short sides and a first principal surface and a second principal surface. The piezoelectric piece includes a mesa portion thicker than a peripheral portion at least on the first principal surface. The excitation electrode is larger than an area of the mesa portion and covers the mesa portion on the principal surface where the mesa portion is formed. The excitation electrode has a center away from a center of the piezoelectric piece toward another short side by a first distance. The mesa portion has a center away from the center of the piezoelectric piece to the other short side by a second distance. The second distance is different from the first distance. | 08-22-2013 |
20130214645 | PIEZOELECTRIC DEVICE AND METHOD FOR FABRICATING THE SAME - A surface mount type piezoelectric device includes a piezoelectric vibrating piece, a base plate in a rectangular shape, and a lid plate. The piezoelectric vibrating piece includes a vibrator vibrating at a predetermined vibration frequency. The base plate has one principal surface where the piezoelectric vibrating piece being to be placed. The lid plate seals the vibrator. The other principal surface of the base plate includes a pair of mounting terminals to mount the piezoelectric device. The pair of mounting terminals includes a metal film and an electroless plating film. The electroless plating film is formed on a surface of the metal film. The mounting terminal includes a trace from which a part of the electroless plating film is removed by laser or dicing. | 08-22-2013 |
20130207523 | PIEZOELECTRIC DEVICE - A piezoelectric device includes a piezoelectric vibrating piece and a base portion in a square shape. The piezoelectric vibrating piece includes a piezoelectric piece, a pair of excitation electrodes, and a pair of extraction electrodes. The base portion includes a pair of connecting electrodes on a first surface at a side of the piezoelectric vibrating piece and a pair of mounting terminals on a second surface. The base portion has short sides facing one another. The short sides include two pairs of castellations depressed toward a center side of the base portion and two pairs of side surface electrodes on the two pairs of castellations. The two pairs of side surface electrodes connect the first surface and the second surface. One pair of the two pairs of side surface electrodes each connect to the pair of connecting electrodes and the pair of mounting terminals. | 08-15-2013 |
20130207517 | ULTRASONIC TRANSDUCER - An ultrasonic transducer includes an ultrasonic transmitting and receiving portion, a housing, a driving device, a casing, a first volume compensation mechanism, a ventilating portion, a diaphragm, and a component. The housing houses the ultrasonic transmitting and receiving portion, and the housing seals ultrasonic propagation liquid. The driving device is configured to drive the ultrasonic transmitting and receiving portion. The casing houses the driving device. The first volume compensation mechanism is configured to absorb a volume change of the ultrasonic propagation liquid. The diaphragm divides an internal space of the casing into at least a first internal space and a second internal space. The ventilating portion is configured to ventilate the first internal space to outside of the casing. The component is disposed in a space other than the first internal space in the internal space and includes a frame ground that electrically connects to an electrical circuit. | 08-15-2013 |
20130193807 | QUARTZ CRYSTAL VIBRATING PIECE AND QUARTZ CRYSTAL DEVICE - An AT-cut quartz crystal vibrating piece with an excitation unit is in a rectangular shape. The quartz crystal vibrating piece includes a framing body, a connecting portion, a pair of excitation electrodes, and a pair of extraction electrodes. The excitation unit has a long side that is rotated at 61° or 119° with respect to the crystallographic axis X. The framing body has a long side that extends in 61° or 119° direction with respect to the crystallographic axis X. The connecting portion extends in 61° or 119° direction with respect to the crystallographic axis X. The connecting portion is perpendicular to a short side of the excitation unit and a short side of the framing body. | 08-01-2013 |
20130187723 | PIEZOELECTRIC MODULE - A piezoelectric module includes a piezoelectric package and a circuit component package. The piezoelectric module includes a thermoset resin with solder particles interposed between a whole circumference of the opening end surface of the second depressed portion including the plurality of connecting terminals of the circuit component package and the outer bottom surface of the first depressed portion of the piezoelectric package. The plurality of external terminals of the piezoelectric package and the plurality of connecting terminals of the circuit component package are electrically connected by metal bonding. The whole circumference of the opening end surface of the second depressed portion of the circuit component package and the outer bottom surface of the first depressed portion of the piezoelectric package are bonded by melting and hardening of the thermoset resin that constitutes the thermoset resin with solder particles. | 07-25-2013 |
20130187720 | TEMPERATURE COMPENSATION TYPE OSCILLATOR - An oscillator includes a first crystal resonator, a second crystal resonator, a first amplifier circuit for oscillation, a second amplifier circuit for oscillation, a mixer circuit, a frequency selection circuit, and a first frequency conversion circuit. Assuming that resonance frequencies of the first and the second crystal resonators at a reference temperature are respectively F | 07-25-2013 |
20130175897 | DISK RESONATOR AND ELECTRONIC COMPONENT - A contour mode disk resonator includes a substrate, a disk-shaped vibration plate, a pair of input electrodes, a pair of output electrodes, a supporting joist with one end, and an absorbing portion. The pair of input electrodes is disposed to face one another via the vibration plate in a planar view. The pair of output electrodes is disposed to face one another via the vibration plate in a direction intersecting with a direction where the pair of input electrodes faces one another in the planar view. The one end is integrally secured to a portion corresponding to a vibration node that occurs by a contour vibration in an outer periphery of the vibration plate. The supporting joist includes an absorbing portion configured to absorb strain energy generated by the contour vibration in the supporting joist. | 07-11-2013 |
20130162362 | SURFACE MOUNT PIEZOELECTRIC OSCILLATOR - A surface mount piezoelectric oscillator includes a piezoelectric resonator with a container main body, a plurality of external terminals, a mounting board with an IC chip, a plurality of connecting terminals, and a solder ball. The solder ball bonds the plurality of external terminals and the plurality of connecting terminals by melting and hardening. The solder bonding portion has approximately a circular shape with approximately a same size as a size of the connecting terminal of the mounting board. The solder ball placed on the connecting terminal of the mounting board is melted, self-aligned, and hardened so as to form a solder fillet of nearly axial symmetry. The solder fillet bridges between the both electrodes and bonds the connecting terminal of the mounting board and the solder bonding portion of the external terminal of the piezoelectric resonator. | 06-27-2013 |
20130154442 | EXTERNAL FORCE DETECTION EQUIPMENT - To easily detect an external force applied to a piezoelectric element with high accuracy and suppress influence of electrostatic charges accumulated in the piezoelectric element. A crystal element is cantilevered inside the container. Excitation electrodes are formed on upper and lower faces, respectively, of the crystal element. A movable electrode connected to the excitation electrode is provided in a leading end portion of the lower face side of the crystal element, and a stationary electrode is provided in a bottom portion of the container. An oscillation loop including the excitation electrodes, the movable electrode, the stationary electrode, and the oscillator circuit is formed. A capacitance change between the electrodes caused by a deflection of the crystal element due to an external force is detected as a frequency. A switch for opening or closing the neutralization path to discharge electrostatic charges generated in the crystal element to the ground is provided. | 06-20-2013 |
20130140948 | RESONATOR - A resonator includes an interdigital transducer electrode, a resonance part, a supporting part, and two beam parts. The interdigital transducer electrode is disposed on a piezoelectric thin film. The resonance part is held on a substrate through an air gap. The supporting part supports the resonance part. The two beam parts connect the resonance part to the supporting part at both ends of the resonance part. The air gap forms a level difference at the supporting part or level differences at the respective two beam parts. | 06-06-2013 |
20130135055 | SURFACE MOUNT PIEZOELECTRIC OSCILLATOR - A surface mount piezoelectric oscillator includes a piezoelectric resonator, a mounting board, and an IC chip mounted on the mounting board. An oscillator circuit includes the IC chip and the piezoelectric resonator. The piezoelectric resonator is bonded to the mounting board with solder balls. The mounting board includes a ceramic plate. The mounting board includes connecting terminals and a wiring pattern on the one mounting board principal surface of the mounting board. The connecting terminals are connected to the terminals of the piezoelectric resonator via solder balls. The mounting board includes an intermediate layer on the one mounting board principal surface and integrally formed with the mounting board. The intermediate layer includes solder ball placement openings to position the solder balls in a center of each of the connecting terminals and an IC chip mounting opening to mount the IC chip. | 05-30-2013 |
20130134837 | DISK TYPE MEMS RESONATOR - In order to provide complete removal of a sacrificial layer on a bottom surface of a disk during an etching process, without leaving residue, a disk type resonator of an electrostatic drive type includes a disk type resonator structure; a pair of drive electrodes at a predetermined gap from an outer peripheral portion of the disk type resonator structure and disposed at both sides of the resonator structure so as to face each other; a unit for applying an alternating current bias voltage with a same phase to the drive electrodes; and a detection unit that obtains an output corresponding to an electrostatic capacitance between the disk type resonator structure and the drive electrodes. The disk type resonator structure has a through hole in the center of the disk and is vibrated in a wineglass mode. | 05-30-2013 |
20130134829 | DISK TYPE MEMS RESONATOR - A variation in a resonance frequency due to variation in dimension accuracy of the supporting structure of the vibrating unit is reduced, and energy loss leaked from the supporting structure is reduced as much as possible. The electrostatic drive disk-type MEMS vibrator includes: a disk type vibrating unit; drive electrodes disposed at a prescribed gap g from the peripheral portion of the disk type vibrating unit and disposed at both sides of the vibrating unit so as to face each other; a unit for applying alternating current bias voltages of the same phase to the drive electrodes; and detection units that obtain outputs corresponding to the capacitance between the disk type vibrating unit and the drive electrodes. The disk type vibrating unit is supported by a pillar-shaped supporting structure disposed upright at the center of the disk and a transverse cross-sectional shape of the supporting structure is non-circular. | 05-30-2013 |
20130119823 | Tuning-Fork Type Piezoelectric Vibrating Piece and Piezoelectric Device - A tuning-fork type piezoelectric vibrating piece ( | 05-16-2013 |
20130107369 | HEARTH LINER FOR OPTICAL THIN FILM FORMATION | 05-02-2013 |
20130106523 | OSCILLATOR | 05-02-2013 |
20130106522 | OSCILLATOR DEVICE | 05-02-2013 |
20130106249 | PIEZOELECTRIC VIBRATING PIECE AND PIEZOELECTRIC DEVICE | 05-02-2013 |
20130106247 | PIEZOELECTRIC VIBRATING PIECE AND PIEZOELECTRIC DEVICE | 05-02-2013 |
20130093538 | SURFACE ACOUSTIC WAVE DEVICE AND ELECTRONIC COMPONENT - Disclosed is a surface acoustic wave device which has IDT electrodes arranged over a lithium tantalate piezoelectric substrate and is capable of suppressing propagation losses even at a high frequency band equal to or higher than 2 GHz as low as possible in order to utilize surface acoustic waves including LSAW. For this purpose, 45° to 46° rotated YX-cut lithium tantalate substrate is used as the piezoelectric substrate, a thickness of the IDT electrode is set to 7.5% λ to 8% λ, and a metallization ratio in electrode fingers of the IDT electrode is set to 0.55 to 0.65. | 04-18-2013 |
20130088308 | ACOUSTIC WAVE FILTER - Disclosed is a pass band type acoustic wave filter capable of obtaining an excellent attenuation characteristic in attenuation bands, in which an IDT electrode having a meander structure is used as at least one of the input-side electrode and the output-side electrode, and the attenuation band is provided over/under the pass band. An electrode having a meander structure in which a plurality of IDT blocks are connected to each other in series between the input port or the output port and the ground port is arranged as the input-side IDT electrode and the output-side IDT electrode, and the electrode finger between the neighboring IDT blocks is removed, so as to suppress excitation of an undesired acoustic wave. | 04-11-2013 |
20130082573 | CRYSTAL UNIT AND METHOD FOR FABRICATING THE SAME - A method for fabricating a crystal unit, including a preparing step, a bonding step, and a separating step, is provided. The preparing step prepares a quartz plate and a supporting substrate with a recess that is larger than the vibrating region on a surface of the supporting substrate. The recess corresponds to a vibrating region in the crystal unit. The bonding step bonds the quartz plate to the surface of the supporting substrate such that the quartz plate is separated from the supporting substrate in the recess. The separating step separates the quartz plate into the vibrating region and the framing portion by performing dry etching on the quartz plate such that the quartz plate has a shape that connects the vibrating region to the framing portion via a supporting beam. The framing portion surrounds the vibrating region. | 04-04-2013 |
20130069489 | PIEZOELECTRIC DEVICE - Disclosed is a piezoelectric device mounted on a mount board, including: a piezoelectric vibrating piece having an excitation electrode and an extraction electrode extracted from the excitation electrode; and a base plate made of an insulative material, the base plate having a first face where the piezoelectric vibrating piece is placed and a second face opposite to the first face, where an external electrode is provided, wherein at least a part of an area other than the external electrode of the second face is hollowed to the first face side to form a cavity in the second face side for the mount board when the piezoelectric device is mounted on the mount board. | 03-21-2013 |
20130063217 | SURFACE-MOUNTED CRYSTAL OSCILLATOR AND MANUFACTURING METHOD THEREOF - There are provided a surface-mounted crystal oscillator and a manufacturing method thereof which can realize miniaturization, improve quality, reduce a manufacturing cost, and enhance productivity. According to the surface-mounted crystal oscillator and the manufacturing method thereof, through terminals and of AgPd are formed on wall surfaces of through holes formed at corner portions of a rectangular ceramic substrate, a metal electrode of a support electrode lower portion of AgPd which is connected to the through terminal and forms a lower layer of a support electrode is formed on a front side of the substrate, the support electrode which holds a crystal piece is formed on the support electrode lower layer portion by using Ag, and a cover is mounted on an insulating film formed on the inner side of the periphery of the substrate and effect airtight sealing. | 03-14-2013 |
20130063002 | CRYSTAL ELEMENT AND CRYSTAL DEVICE - A mesa-structure crystal element includes a circumferential portion having a thin thickness, a first convex portion formed on a plane in a center side from the circumferential portion and having a first height from the circumferential portion in a first principal face and a first planar shape, and a second convex portion formed in a center side from the circumferential portion and having a second height from the circumferential portion in a second principal face opposite to the first principal face and a second planar shape, wherein at least one of an area and a planar shape is different between the first planar shape of the first convex portion and the second planar shape of the second convex portion, or the first height of the first convex portion is different from the second height of the second convex portion. | 03-14-2013 |
20130063001 | PIEZOELECTRIC DEVICE AND METHOD OF MANUFACTURING PIEZOELECTRIC DEVICE - A piezoelectric device includes: a rectangular piezoelectric element formed of a piezoelectric material, the piezoelectric element having a rectangular excitation portion having an excitation electrode, a frame surrounding a circumference of the excitation portion, a connecting portion connecting one side of the rectangular excitation portion and the frame with a predetermined width; a base plate having a mounting face where a pair of external electrodes electrically connected to the excitation electrode are formed and a base bonding face bonded to one of principal faces of the frame; a lid plate bonded to the other principal face of the frame; and a bonding material for bonding the base plate, the frame, and the lid plate, wherein a trench having a length equal to or more than the predetermined width of the connecting portion is formed in at least one of the frame, the base plate, and the lid plate. | 03-14-2013 |
20130057115 | VIBRATOR, ELECTRONIC COMPONENT, AND METHOD OF MANUFACTURING VIBRATOR - A vibrator includes a base substrate, a tuning fork type vibrating body, a first vibrating body, a second vibrating body, a first extraction electrode at the one vibration arm portion, a second extraction electrode at the other vibration arm portion, and an input/output port at the base portion. The input/output port is configured to input/output an electric signal to/from each of the first extraction electrode, the second extraction electrode, and the excitation electrodes of the vibration arm portions. The tuning fork type vibrating body is configured to generate a flexural vibration in reverse phase to the contour vibration of the first and second vibrating bodies, so as to absorb the contour vibration of the first and second vibrating bodies. | 03-07-2013 |
20130049541 | SURFACE MOUNT TYPE PIEZOELECTRIC DEVICE - A piezoelectric device includes a rectangular base plate having a first face where a pair of mounting terminals are formed, a second face opposite to the first face, where a bonding face is formed in a circumference, and a pair of connecting electrodes formed in the bonding face; a rectangular piezoelectric vibrating piece having a pair of excitation electrodes and lead electrodes extracted from a pair of the excitation electrodes, so that the lead electrode is fixed to the connecting electrode using a conductive adhesive; a lid plate that covers the piezoelectric vibrating piece; and a ring-shaped encapsulating material arranged in a ring shape between the bonding face and the lid plate to encapsulate the base plate and the lid plate. The connecting electrode is formed in a comb-tooth shape as seen from a normal direction of the second face to increase a lateral length of the connecting electrode. | 02-28-2013 |
20130043771 | MESA-TYPE QUARTZ-CRYSTAL VIBRATING PIECE AND QUARTZ CRYSTAL DEVICE - A mesa-type quartz-crystal vibrating piece includes a vibrator in a quadrangular shape with both main surfaces, a pair of excitation electrodes on both the main surfaces, a thin portion outside of the quadrangular shape, and a pair of extraction electrodes. The thin portion has a thickness thinner than a thickness of the vibrator. The pair of extraction electrodes are extracted from the excitation electrodes to a predetermined direction. A center of a first length in the predetermined direction of the excitation electrode is decentered from a center of a second length in the predetermined direction. The second length includes a length of the vibrator and a length of the thin portion. The center of the first length is decentered toward an opposite side of the extraction electrode by 25 μm to 65 μm. | 02-21-2013 |
20130043770 | PIEZOELECTRIC VIBRATING PIECE AND PIEZOELECTRIC DEVICE - A piezoelectric vibrating piece includes a vibrator in a rectangular shape, a framing portion, and one connecting portion. The vibrator includes a first side and a pair of second sides. The first side extends in a first direction. The second sides extend in a second direction perpendicular to the first direction. The framing portion surrounds the vibrator across a void. The one connecting portion connects the first side of the vibrator and the framing portion together. The one connecting portion has a predetermined width in the first direction. The one connecting portion extends in the second direction. | 02-21-2013 |
20130042672 | SENSING DEVICE, SENSING SYSTEM, AND SENSING METHOD - A sensing device is to be connected to a piezoelectric resonator for sensing a target substance in a sample fluid based on oscillation frequency of the piezoelectric resonator. The sensing device includes an oscillator circuit, a voltage supply unit, an information obtaining unit, and a voltage adjusting unit. The oscillator circuit is commonalized among a plurality kinds of piezoelectric resonators. The voltage supply unit is configured to supply a DC drive voltage to the oscillator circuit. The information obtaining unit is configured to obtain type information of a piezoelectric resonator which is connected to the oscillator circuit. The voltage adjusting unit is configured to adjust the DC drive voltage to a voltage corresponding to the connected piezoelectric resonator based on the type information obtained by the information obtaining unit. | 02-21-2013 |
20130038400 | TEMPERATURE-COMPENSATED CRYSTAL OSCILLATOR - A temperature-compensated crystal oscillator includes a crystal resonator; and an oscillator circuit for performing temperature compensation. The oscillator circuit has a temperature sensor unit that measures an ambient temperature of the crystal resonator, a temperature compensation unit that outputs a first voltage for temperature compensation based on the measured temperature, a high-temperature load capacitance adjustment unit that outputs a second voltage for temperature compensation based on the temperature measured in a high temperature area exceeding a particular temperature range, an oscillator unit having first and second variable capacitance elements used for temperature compensation within a particular temperature range, third and fourth variable capacitance elements used for temperature compensation in the high temperature area, and an oscillation integrated circuit (IC) connected to the crystal resonator to perform an oscillation operation, and a buffer that amplifies the output from the oscillator unit. | 02-14-2013 |
20130038397 | OSCILLATION DEVICE - An oscillation device for reducing memory capacity includes a frequency difference detecting unit and a compensation value obtaining unit. When oscillation frequencies of the first and second oscillation circuits are respectively f | 02-14-2013 |
20130033332 | QUARTZ-CRYSTAL CONTROLLED OSCILLATOR - An atmosphere temperature at which a quartz-crystal oscillator and an oscillation circuit are placed is controlled in high accuracy, and an output frequency with high stability is obtained. If oscillation outputs of first and second quartz-crystal oscillators are set to f | 02-07-2013 |
20130033153 | PIEZOELECTRIC DEVICE AND METHOD FOR MANUFACTURING THE SAME - A piezoelectric device includes a piezoelectric vibrating piece with a pair of excitation electrodes, a base plate, and a non-conductive bonding material. The base includes a pair of castellations that are hollowed into a side face from the mounting surface to the bonding surface. The pair of castellations include a first surface and a second surface. The first surface extends outward from the mounting surface toward the bonding surface side. The second surface extends outward from the bonding surface toward the mounting surface side. The second surface has a smaller area than an area of the first surface. A wiring electrode is disposed on the first surface, the second surface, and a side face of the bonding material. The wiring electrode is of a same electrode layer as the external electrode. The wiring electrode extends from the external electrode to the extraction electrodes. | 02-07-2013 |
20130027141 | CRYSTAL RESONATOR AND CRYSTAL OSCILLATOR - A crystal resonator comprises a first vibrating region provided on a crystal wafer, a second vibrating region provided on the crystal wafer, the second vibrating region having a different thickness and positive/negative orientation of the X-axis from those of the first vibrating region, and excitation electrodes which are provided respectively on the first vibrating region and the second vibrating region for causing the vibrating regions to vibrate independently. Frequencies that change by different amounts from each other relative to a temperature change can be retrieved from one vibrating region and the other vibrating region. Thus, based on an oscillating frequency of the vibrating region in which a clear frequency change occurs relative to the temperature, the oscillating frequency of the other vibrating region can be controlled. Thereby, increases in the complexity of the crystal oscillator can be suppressed. | 01-31-2013 |
20130020912 | PIEZOELECTRIC VIBRATING PIECE, PIEZOELECTRIC DEVICE, AND METHOD FOR MANUFACTURING PIEZOELECTRIC DEVICE - A piezoelectric vibrating piece is to be bonded to and sandwiched between a lid plate and a base plate with an external electrode. The piezoelectric vibrating piece has a first main surface at the lid plate side and a second main surface at the base plate side. The piezoelectric vibrating piece includes an excitation unit, a first excitation electrode, a second excitation electrode, a framing portion, one connecting portion, a first extraction electrode, and a second extraction electrode. The connecting portion includes a planar surface parallel to both the main surfaces and a side face intersecting with the planar surface. The first extraction electrode is extracted via the connecting portion. The second extraction electrode is extracted via the connecting portion. The first extraction electrode is disposed on at least a part of the side face of the connecting portion to be extracted to the framing portion. | 01-24-2013 |
20130020911 | PIEZOELECTRIC VIBRATING PIECE AND PIEZOELECTRIC DEVICE - A piezoelectric vibrating device and a piezoelectric vibrating piece including an excitation unit, a framing portion and a connecting portion are provided. The excitation unit includes a first side extending in a first direction and a second side extending in a second direction. The connecting portion has a thickness of a first thickness in a third direction perpendicular to the first direction and the second direction. The excitation unit includes a first region, a second region and a third region. The pair of excitation electrodes are disposed on the first region. The second region with the first thickness is directly connected to the connecting portion. The third region is disposed between the first region and the second region. The third region has a thickness in the third direction of a second thickness. The second region has a thickness in the third direction that is thicker than the second thickness. | 01-24-2013 |
20130010438 | ELECTRONIC DEVICE - An electronic device is provided. In the electronic device, a cover is securely fitted to a predetermined positioning hole formed in a printed board using a ready-made cover without using solder when the cover is installed in the printed board, so that the cover is prevented slipping from the printed board. The positioning hole is formed in a predetermined position of the printed board, and a cover claw that can be fitted to the positioning hole of the cover is formed in the cover, so that the cover covers the principal surface of the printed board to provide an electronic device. | 01-10-2013 |
20130008883 | TEMPERATURE CONTROL CIRCUIT OF OVEN-CONTROLLED CRYSTAL OSCILLATOR - A temperature control circuit of oven-controlled crystal oscillator includes a heater resistor, a first resistor, a thermistor, a second resistor, a third resistor, a differential amplifier, a PNP-type power transistor, and a PNP-type current-limiting transistor. The thermistor outputs a voltage depending on a temperature. The differential amplifier amplifies a difference between the voltage received by the one input terminal and the voltage received by the other and output as a control voltage. The PNP-type power transistor includes an emitter where the other end of the heater resistor is connected, a base that receives an output of the differential amplifier, and a grounded collector. The PNP-type current-limiting transistor has an emitter where a power voltage is supplied, a base that receives a voltage between the other end of the heater resistor and the emitter of the power transistor, and a collector connected to the base of the power transistor. | 01-10-2013 |
20130002096 | PIEZOELECTRIC VIBRATING DEVICE AND METHOD FOR MANUFACTURING SAME - A piezoelectric device includes a piezoelectric vibrating plate, a first plate, a first glass sealing material disposed in a ring shape, and an electrically conductive adhesive. The piezoelectric vibrating plate includes a piezoelectric vibrating piece, a frame body, and a pair of extraction electrodes. The piezoelectric vibrating piece includes a pair of excitation electrodes. The frame body surrounds the piezoelectric vibrating piece. The frame body is formed integrally with the piezoelectric vibrating piece. The first glass sealing material encloses a periphery of the first main surface of the frame body so as to bond the first plate and the first main surface of the frame body together. | 01-03-2013 |
20120326566 | EXTERNAL FORCE DETECTION APPARATUS AND EXTERNAL FORCE DETECTION SENSOR - In an external force detection apparatus, a crystal plate is cantilevered within a container. Excitation electrodes are formed on the top surface and the bottom surface of the crystal plate. A movable electrode is formed on a distal end on the bottom surface of the crystal plate and is connected to the excitation electrode on the bottom surface via an extraction electrode. A fixed electrode is provided on the bottom of the container to oppose the movable electrode. The excitation electrode on the top surface and the fixed electrode are connected to an oscillating circuit. When an external force acts on the crystal plate to bend it, the capacitance between the movable electrode and the fixed electrode changes, and this capacitance change is captured as a change in the oscillating frequency of the crystal plate. | 12-27-2012 |
20120319792 | PIEZOELECTRIC DEVICE AND FABRICATING METHOD THEREOF - A piezoelectric device and a fabricating method thereof are provided. Variation of output frequency is suppressed by forming an organic resin to protect an IC chip that is mounted in a cavity of a container body, and damage that may occur to the IC chip during the mounting process is prevented. The piezoelectric device includes a container body, a crystal resonator, an IC chip and a cover body. A surface of the IC chip, which is a mounting surface for mounting to the container body, has bumps thereon for connecting to terminal pads of a circuit wiring pattern configured on a bottom surface of a bottom cavity of the container body, and the other surface of the IC chip has an insulating protective sheet adhered and fixed thereon. | 12-20-2012 |
20120313488 | CRYSTAL DEVICE - A crystal device is provided, in which a peeling of a bonding material is prevented by using the bonding material having a thermal expansion coefficient which is between the coefficients in a first direction and a second direction of a bonding surface of a crystal element. A crystal device includes a rectangular crystal element formed with a crystal material that includes an excitation part and a frame surrounding the excitation part. The device further includes a rectangular base bonded to a principal surface of the frame, and a lid bonded to another principal surface of the frame; and the frame, the base and the lid have edges respectively along a first direction and a second direction intersecting with the first direction. The bonding material is applied having a thermal expansion coefficient that is between the coefficients in the first direction and second direction of the crystal element. | 12-13-2012 |
20120312097 | ACCELERATION MEASURING APPARATUS - An acceleration measuring apparatus that can easily detect acceleration with high accuracy is provided. In the apparatus, positional displacement of a swingable pendulum member is detected, feedback control is performed to maintain the pendulum member in a stationary state using an actuator, and acceleration is measured by measuring the output of the actuator at this time. A movable electrode is provided to the pendulum member, and a loop is formed in which a fixed electrode provided to oppose the movable electrode, and an oscillating circuit, a crystal unit, and the movable electrode are electrically connected in series. By measuring an oscillating frequency of the oscillating circuit at this time, a change in the size of a variable capacitance formed between the movable electrode and the fixed electrode is detected, and thereby the positional displacement of the pendulum member is detected. | 12-13-2012 |
20120306582 | OVEN-CONTROLLED CRYSTAL OSCILLATOR - A crystal unit and a thermistor with negative resistance-temperature characteristics are housed in a thermostatic oven heated by a heater. A transistor driving the heater is controlled by an output of a differential amplifier, the thermistor is placed between a power supply voltage and an inverting input of the amplifier, and a first resistor used to adjust the temperature of a zero temperature coefficient point of the crystal unit is installed between the inverting input and a ground point. A second resistor is installed between the power supply voltage and a non-inverting input of the amplifier and a third resistor is installed between the non-inverting input and ground point. One of the second and third resistors is a resistor assembly made up of a plurality of resistance elements and one of these resistance elements is provided with positive resistance-temperature characteristics and adapted to detect ambient temperature. | 12-06-2012 |
20120306320 | PIEZOELECTRIC DEVICE AND MANUFACTURING METHOD THEREOF - The present disclosure provides the piezoelectric devices in which the bonding condition of devices can be easily observed. The piezoelectric device ( | 12-06-2012 |
20120306315 | PIEZOELECTRIC SENSOR - A piezoelectric plate in the piezoelectric sensor is obtained from a rotated Y-plate where a rotation angle around the X-axis is set according to a type of the piezoelectric crystalline material, a detection region is located on a surface parallel to an X-Z plane, and a transmitting and a receiving parts are opposite to each other at positions sandwiching the detection region along an X-axis direction of the piezoelectric plate. When a guided wave excited by applying a frequency signal from the transmitting part satisfies ξh=mπ/(2λ) (2h: thickness of the piezoelectric plate, ξ: wave number in the X-axis, λ: wave number in thickness direction normalized by ξ, m: positive even number), the rotation angle satisfies the displacement of a P wave component of the guided wave becomes the maximum, or the displacement of the SH wave component of the guided wave becomes the maximum. | 12-06-2012 |
20120293213 | FREQUENCY SYNTHESIZER - In forming a frequency synthesizer by using PLL using processing of digital signals, an A/D converting unit is not required. By the integration of a digital value that depends on a set frequency, a saw-tooth wave serving as a phase signal is generated. A frequency signal output from a voltage-controlled oscillator is input via a frequency divider to an edge detecting unit, which then detects a rising edge or a falling edge of the frequency signal to generate a rectangular-wave signal that depends on a frequency of the frequency signal. Then, a latched circuit latches a value of the saw-tooth wave in response to the rectangular-wave signal, and this value is integrated in a loop filter and the resultant is used as a control voltage of the voltage-controlled oscillator. | 11-22-2012 |
20120293048 | PIEZOELECTRIC DEVICE - A piezoelectric device including a tuning-fork piezoelectric vibrating element having a base and a pair of vibrating arms positioned parallel to each other and extending from the base at right angles. The piezoelectric device further including a pair of support arms extending from the base positioned parallel to each other and in the same direction as the vibrating arms. A package is included having a lid and a housing recess sealed by the lid wherein the tuning-fork piezoelectric vibrating element is housed. A pair of supports are provided on a bottom face of the housing recess for fixing the tuning-fork piezoelectric vibrating element by the support arms. A clearance groove is formed in the bottom face of the housing access to prevent the tuning-fork piezoelectric vibrating element from colliding against the bottom face of the housing recess. | 11-22-2012 |
20120292300 | TEMPERATURE CONTROL CIRCUIT OF OVEN CONTROLLED CRYSTAL OSCILLATOR - A temperature control circuit of an oven controlled crystal oscillator (OCXO) is provided. A first and a second digital potentiometer are correspondingly arranged in a bridge circuit which outputs a voltage to an input terminal of a differential amplifier (OPAMP), wherein the resistance value of the first digital potentiometer is adjustable so as to adjust the temperature of the oven to the peak temperature of the crystal resonator, and the resistance value of the second digital potentiometer is adjustable so as to cancel the temperature gradient of the first digital potentiometer. In the temperature control circuit of OCXO, the heat generation of the heater resistor is controlled by the power transistor based on the control voltage from the differential amplifier. | 11-22-2012 |
20120249255 | CRYSTAL DEVICE AND MANUFACTURING METHOD THEREOF - A crystal device includes; a base, a framed crystal vibrating blank in which a mesa section is formed on an upper face end bonded to a seal path on an upper surface of the base via a low melting point glass layer or a resin adhesive layer, and a lid bonded to a seal path on an upper surface of the framed crystal vibrating blank via a low melting point glass layer or a resin adhesive layer. A pillow made of low melting point glass or a resin adhesive that suppresses vibration amplitude at the time of a drop impact of the framed crystal vibrating blank is formed on a rear surface of the lid simultaneously with the low melting point glass layer or the resin adhesive layer. | 10-04-2012 |
20120249203 | SIGNAL GENERATOR - There is provided a signal generator outputting an analog frequency signal based on a digital value according to a set frequency, which provides excellent noise characteristics, requires no ROM table corresponding to waveform data, and has a simple configuration. A digital signal having a digital value according to a set frequency is integrated to generate a waveform in a sawtooth shape, a waveform in a triangular wave shape is generated based on the waveform, and this waveform output is differentiated and then DIA converted and integrated. A comparator using, for example, the voltage at a midpoint of the triangular wave as a threshold value is used for the integrated output, and a frequency signal of an objective frequency is obtained from the comparator. | 10-04-2012 |
20120248940 | PIEZOELECTRIC DEVICE AND MANUFACTURING METHOD OF PIEZOELECTRIC DEVICE - A piezoelectric device, in which one of a first plate, a second plate, and an adhesive agent is colored for confirming a bonding status of the adhesive agent, and a manufacturing method thereof, are provided. A piezoelectric device includes a piezoelectric vibrating piece that vibrates by applying a voltage; a first plate and a second plate formed of glass and seal the piezoelectric vibrating piece; and an adhesive agent which bonds the first plate with the second plate, wherein one of the first plate, the second plate, and the adhesive agent is colored. | 10-04-2012 |
20120248933 | PIEZOELECTRIC DEVICE AND MANUFACTURING METHOD THEREFOR - A manufacturing method, which realizes general versatility of an external connection terminal by reducing deterioration of characteristics and a decrease in yield rate of a piezoelectric device in an external connection terminal forming process, and a piezoelectric device manufactured by this method are provided. Before a piezoelectric device is sealed together with a ceiling layer to form a package, an electrode structure serving as an external connection terminal is provided beforehand on a substrate mounted with a key area of the device, and after formation of the key area of the device, the piezoelectric device is sealed and packaged together with the ceiling layer. The piezoelectric device of the present invention can accommodate a three-dimensional structure by providing a rewiring layer on a principal surface of the substrate. | 10-04-2012 |
20120242418 | VOLTAGE-CONTROLLED OSCILLATING CIRCUIT AND CRYSTAL OSCILLATOR - A voltage-controlled oscillating circuit includes a differential amplifying circuit connected to a resonant element such as a quartz crystal element. The differential amplifying circuit includes first and second input terminals connected to the resonant element and also connected respectively to first and second voltage-controlled capacitors. The differential output terminals of the differential amplifying circuit are connected respectively to first and second emitter follower circuits. The output signal of the first emitter follower circuit is fed back to the second input terminal through a third capacitor and a third voltage-controlled capacitor, and the output signal of the second emitter follower circuit is fed back to the second input terminal through a fourth capacitor and a fourth voltage-controlled capacitor. A control voltage is applied to each of the voltage-controlled capacitors. | 09-27-2012 |
20120242195 | CRYSTAL DEVICE AND INSPECTION METHOD OF CRYSTAL DEVICE - A crystal device and an inspection method for inspecting the crystal device are provided. The crystal device includes: a crystal plate; excitation electrodes formed on the crystal plate; extraction electrodes extending from the excitation electrodes; electrode pads electrically connected with the extraction electrodes; a package including mounting terminals formed on a mounting surface and connection terminals formed on a bottom surface, which is on the other side of the mounting surface, and electrically connected with the mounting terminals; and an electrically-conductive adhesive agent bonding and fixing the connection terminals to the electrode pads. An bonding status inspection region, on which no metal film is formed, is formed in the crystal plate, and the bonding status inspection region is surrounded by or adjacent to the electrode pads. In addition, the bonding status inspection region occupies not more than 25% of the area of the electrode pads. | 09-27-2012 |
20120235769 | ELASTIC WAVE FILTER - There is provided a tapered elastic wave filter higher in impedance than a conventional filter where one input-side IDT electrode and one output-side IDT electrode are disposed. Filter parts which are the same in the structure of an input-side IDT electrode and in the structure of an output-side IDT electrode are disposed, and when the first filter part is disposed on a lower side and the second filter part is disposed on an upper side of the first filter part so that the input-side IDT electrodes are connected and the output-side IDT electrodes are connected, in cascade (in series) between a signal port and a ground port, an upper busbar in each of the IDT electrodes of the first filter part and a lower busbar in each of the IDT electrodes of the second filter part are electrically connected to each other. | 09-20-2012 |
20120235761 | SURFACE MOUNTED CRYSTAL OSCILLATOR - A metal base having plural protrusions at its bottom is engaged with and placed on standing metal pins in plural through holes provided in a base board, and a circuit board is fitted to an upper end of the metal pins. A crystal resonator is arranged on the circuit board via a heater element, and the metal base is covered with a metal cover, thereby obtaining a sealed structure of the crystal resonator. A two-stage counterbored portion including a first-stage and a second-stage counterbored portions is formed in the bottom of the base board, and a solder or conductive resin is filled in a gap between the first-stage counterbored portion formed around the metal pin inserted into the through hole, and the through hole and the metal pin to fix the metal pin in the though hole. Slits penetrating through the base board are formed around the metal pin. | 09-20-2012 |
20120235542 | PIEZOELECTRIC DEVICE - To facilitate positioning of an external terminal and ensure sufficient solder joint strength at the time of mounting a piezoelectric device on a mounting board by soldering. In a crystal device of the present invention, an external terminal is formed, for example, at four corners on an external bottom surface of a base having a rectangular shape as seen in a plan view, and the external terminals include two active terminals arranged opposite to each other on a diagonal line, and two ground terminals arranged opposite to each other on another diagonal line crossing the diagonal line. An arbitrary sign, character, or figure is marked on a mounting surface of at least one ground terminal of external terminals to determine the direction of the active terminal. | 09-20-2012 |
20120229002 | PIEZOELECTRIC VIBRATING PIECE AND PIEZOELECTRIC DEVICE - A piezoelectric vibrating piece and a piezoelectric device are provided, in which the deterioration of the vibrating characteristics of a vibrating portion is prevented. The piezoelectric vibrating piece comprises a rectangular-shaped first surface having a long side and a short side; a second surface opposing the first surface; and side surfaces, connecting the first surface and the second surface. The piezoelectric vibrating piece further comprises a first excitation electrode formed on a central part of the first surface; a first extraction electrode extracted from the first excitation electrode to an outer peripheral portion of the second surface via only the side surface at the short side; a second excitation electrode formed on the second surface opposite to the first excitation electrode; and a second extraction electrode extracted from the second excitation electrode to the outer peripheral portion of the second surface. | 09-13-2012 |
20120219458 | SENSING DEVICE - A sensing device is configured that a first piezoelectric vibrator and a second piezoelectric vibrator, changing over a connection to an oscillation circuit, have the oscillation circuit in common, that an impedance of a conductive path including a first one-surface-side electrode constituting the first piezoelectric vibrator from the oscillation circuit and an impedance of a conductive path including a second one-surface-side electrode constituting the second piezoelectric vibrator from the oscillation circuit are uniform with each other, and that an impedance of a conductive path including a first other-surface-side electrode constituting the first piezoelectric vibrator from the oscillation circuit and an impedance of a conductive path including a second other-surface-side electrode constituting the second piezoelectric vibrator from the oscillation circuit are uniform with each other. | 08-30-2012 |
20120218048 | OSCILLATION DEVICE - Provided is an oscillation device capable of obtaining a stable oscillation frequency by compensating for a change in oscillation frequency caused with an elapse of operating time of a quartz-crystal oscillator. A difference value ΔF between a frequency difference between first and second quartz-crystal oscillators after a predetermined period of time has elapsed from a reference time and a frequency difference between the first and second quartz-crystal oscillators at the reference time is determined. | 08-30-2012 |
20120217846 | Crystal Device - A surface-mount type crystal device is provided, having a rectangular crystal element including an excitation part and a frame surrounding the excitation part, wherein the frame has sides respectively along a first and a second directions intersected with each other; a rectangular base, bonded to a principal plane of the frame, having sides respectively along the first and the second directions; a rectangular lid, bonded to another principal plane of the frame, having sides respectively along the first and the second directions. A first and a second bonding materials, respectively corresponding to a thermal expansion coefficient in the first and the second directions of the crystal element, are respectively applied on the sides of the first and the second directions of each of the frame of a crystal material, the base and the lid. A second bonding material is different from the first bonding material. | 08-30-2012 |
20120212107 | GT-CUT QUARTZ CRYSTAL RESONATOR - A GT-cut crystal resonator that can be provided with a support portion having a small and simple configuration without adverse effect on vibration characteristics includes: a crystal plate formed in an elliptical shape with a major axis and a minor axis respectively corresponding to vibration directions of two longitudinal vibration modes orthogonal to each other in a GT-cut; and a support portion that supports the crystal plate, the support portion being connected to a position on an outer periphery of the crystal plate where a minimum vibration displacement is obtained when the two longitudinal vibration modes are coupled. | 08-23-2012 |
20120212105 | PIEOZELECTRIC DEVICES AND METHODS FOR MANUFACTURING THE SAME - The purpose of the present disclosure is to provide a piezoelectric device that is less likely to be damaged during the cutting process from a wafer into individual pieces, and can be measured at the wafer without being affected by adjacent piezoelectric devices. The piezoelectric device includes: a first plate which constitutes a part of the package for storing the vibrating portion, having a pair of first edges and second edges situated vertically to the first edges; a second plate bonded to the first plate and constitutes another part of the package for storing the vibrating portion; and an adhesive for bonding the first plate and the second plate together. A pair of castellations is formed on each first edge, situated symmetrical to a straight line that passes through a centerline of the first plate and is parallel to the second edge. The present disclosure also provides methods for manufacturing. | 08-23-2012 |
20120206020 | PIEZOELECTRIC DEVICE - A piezoelectric device capable of adjusting shape/position of connection electrodes is provided to accommodate a first or second oscillating plate (piezoelectric). The second oscillating plate is shorter than the first oscillating plate, each oscillating plate includes an excitation and an extraction electrodes. The extraction electrode is electrically connected with a connection electrode via conductive adhesive agent in a package. The package includes a carrier section, carrying the first or the second oscillating plate thereon. The connection electrode is disposed on at least a portion of a surface of the carrier section. When the extraction electrode of the first oscillating plate is electrically connected with the connection electrode, the excitation electrode on one side of the first oscillating plate is not electrically connected with the connection electrode on the other side. The extraction electrodes of the second oscillating plate can be electrically connected with the connection electrodes. | 08-16-2012 |
20120200366 | OSCILLATOR - An oscillator that can suppress a solder crack caused by a temperature change by a simple structure at low cost and improve heat cycle resistance performance is provided. The oscillator includes an epoxy resin board and an electronic component mounted on the board. Two-terminal electrode patterns are formed on the board, and connected to terminal electrodes of the electronic component by solder. A projection is formed on each of the electrode patterns at a part connected to a corresponding terminal electrode to create a space between the terminal electrode and the electrode pattern, and the solder forms a fillet in the space. This contributes to enhanced adhesion strength of the solder. | 08-09-2012 |
20120200363 | PIEZOELECTRIC OSCILLATOR - Provided is a piezoelectric oscillator to attain high-frequency performance and frequency stabilization with the use of reflection characteristics of a reflective element. A piezoelectric oscillator is configured such that: a resonant circuit is connected to a gate of a field effect transistor; an output terminal is connected to a drain and a power supply voltage V is applied to the drain; a piezoelectric resonator is connected to a source, as a reflective element; and a resonance frequency of the resonant circuit and an oscillation frequency of the piezoelectric resonator as a reflective element are set to substantially the same frequency, and further, the piezoelectric oscillator may be configured such that a first matching circuit is provided between the resonant circuit and the gate, a second matching circuit is provided between the drain and the output terminal, and a third matching circuit is provided between the source and the reflective element. | 08-09-2012 |
20120200198 | Surface-Mount Piezoelectric Device - The present invention provides piezoelectric surface mount devices in which the area of the mounting terminals is reduced, leading to reduction of manufacturing cost. A piezoelectric device comprises a package base ( | 08-09-2012 |
20120194280 | OSCILLATION DEVICE - An oscillation device capable of highly accurate temperature compensation of an output frequency is provided. The oscillation device includes: first and second oscillator circuits oscillating first and second quartz-crystal resonators with overtones respectively; a frequency difference detecting part finding a value corresponding to a difference value between values corresponding to differences between f | 08-02-2012 |
20120194277 | OSCILLATION DEVICE - To perform, in an oscillation device compensating an output frequency based on a detection result of ambient temperature, temperature compensation of the output frequency with high accuracy. First and second quartz-crystal oscillators are structured by using a common quartz-crystal piece, and when oscillation outputs of first and second oscillation circuits respectively connected to these quartz-crystal oscillators are set to f | 08-02-2012 |
20120186351 | Vibration Detecting Device - Provided is a device capable of easily and accurately detecting a vibration period when, for example, an earthquake occurs. When a quartz-crystal plate bends upon application of a force, capacitance between a movable electrode provided at its tip portion and a fixed electrode provided on a vessel to face the movable electrode changes, so that an oscillation frequency of the quartz-crystal plate changes according to this capacitance. Therefore, when the vessel is vibrated, there appear a first state where the quartz-crystal plate ends to approach the fixed electrode and a second state where the quartz-crystal plate is in an original state or bends to be apart from the fixed electrode. Accordingly, an oscillation frequency corresponding to the first state and corresponding to the second state alternately appear, and therefore, it is possible to find the period (frequency) of the vibration. | 07-26-2012 |
20120181899 | Piezoelectric resonator and elastic wave device - The generation of secondary vibration different in oscillation frequency from primary vibration is suppressed. In a quartz-crystal resonator in which excitation electrodes are formed respectively on both surfaces of a quartz-crystal piece whose primary vibration is thickness shear vibration, a hole portion is formed at a portion, in the excitation electrode, where secondary vibration is generated, and a concave portion is formed in a region, in the quartz-crystal piece, corresponding to the hole portion. Alternatively, a convex portion are preferably provided symmetrically with respect to a center of the quartz-crystal resonator. Consequently, the secondary vibration attenuates and the oscillation frequency of the secondary vibration shifts to a high frequency side. | 07-19-2012 |
20120180568 | External force detecting device and external force detecting sensor - A device is provided for a detecting external force applied to piezoelectric piece. A crystal piece is cantilever-supported in a container. Excitation electrodes are formed on an upper face and lower face, respectively. A movable electrode, connected via a lead-out electrode to the excitation electrode, is formed on the lower face side at a front end of the crystal piece. A fixed electrode is provided on a bottom portion of the container to face this movable electrode. The excitation electrode on the upper face side and the fixed electrode are connected to an oscillation circuit. When the crystal piece bends in response to an applied external force, capacitance between the movable electrode and fixed electrode, changes. This capacitance change results in a corresponding change in oscillation frequency of the crystal piece. | 07-19-2012 |
20120180567 | External force detecting method and external force detecting device - A technique for detecting external force applied to a piezoelectric plate is provided. A crystal plate is cantilever-supported in a container. Excitation electrodes are formed on an upper face and lower face, respectively, of the crystal plate. A movable electrode is formed on the lower face side. A fixed electrode is provided on a bottom portion of the container facing the movable electrode. The excitation electrode on the upper face side and the fixed electrode are connected to an oscillation circuit. When the crystal plate bends by external force applied, capacitance between. A direction of the movable electrode along a length direction of the crystal plate is set to 30° to 60°, relative to a face orthogonal to an intended direction of the external force. The movable electrode and fixed electrode changes, and this capacitance change and a deformation of the crystal circuit. | 07-19-2012 |
20120176763 | CRYSTAL OSCILLATOR - A crystal oscillator is configured by accommodating a crystal blank that functions as a crystal unit and an IC chip that includes at least an oscillator circuit using the crystal blank into a container in an integrated manner. In the IC chip, the oscillator circuit is connected to the crystal unit via a pair of crystal connecting terminals, an output from the oscillator circuit is supplied to a plurality of output buffers. In relation to the crystal connecting terminal having a phase opposite to that of an output from the on/off controllable output buffer, an output terminal of this output buffer is disposed farther than an output terminal of the output buffer that is not subjected to the on/off control. | 07-12-2012 |
20120176203 | CRYSTAL OSCILLATOR - A crystal oscillator is provided, which varies a frequency drift compensation according to a power consumption and compensates a frequency drift characteristic caused by heat. An adder is used to add a temperature compensation control voltage from a temperature compensation circuit, an oscillating frequency control voltage from an AFC circuit, and a frequency drift compensation voltage corresponding to the power consumption from a frequency drift compensation circuit. A voltage added by the adder is outputted to voltage-variable capacitor elements and, which respectively are connected to an input side and an output side of an inverter IC that is connected in parallel to a crystal oscillating unit. | 07-12-2012 |
20120161887 | Oven controlled crystal oscillator - The present invention relates to an oven controlled crystal oscillator that can obtain stable oscillation frequency by reducing a temperature change in an oscillation element. The oven controlled crystal oscillator comprises; a heat-conducting plate mounted on one surface of a circuit board, a crystal resonator mounted on a surface of the heat-conducting plate opposite to the surface of the circuit board, an oscillation element constituting an oscillation circuit together with the crystal resonator, and a thermistor that detects temperature of the crystal resonator, a heating resistance which heats the crystal resonator, and a temperature control element including at least a power transistor, to constitute a temperature control circuit together with the thermistor and the heating resistance. In the oven controlled crystal oscillator, two or more open areas communicating with the heat-conducting plate at least in the thickness direction thereof are formed on the periphery of the heat-conducting plate at positions point-symmetric with respect to the crystal resonator, and one or more of each of the power transistor and the heating resistance are arranged in the same number in all of the open areas. | 06-28-2012 |
20120161882 | SURFACE MOUNT CRYSTAL OSCILLATOR AND SUBSTRATE SHEET - Provided is a surface mount crystal oscillator and a substrate sheet to prevent a decrease in a frequency variable amount by reducing electrostatic capacitance of the crystal oscillator. The surface mount crystal oscillator and the substrate sheet are each configured such that one end of a crystal holding terminal is connected to a corner terminal, and another end of the crystal holding terminal is formed from a center of a short side to be shorter than the one end so as to form an area in which no pattern is formed, and a pattern of a GND terminal is formed on that portion of a rear surface of a substrate which is opposed to the area in which no pattern is formed, so that the pattern (a crystal-mounted pattern) of the crystal holding terminal and the pattern of the GND terminal are not opposed to each other across the substrate. | 06-28-2012 |
20120154061 | CRYSTAL OSCILLATOR AND METHOD OF MANUFACTURING THE SAME - A crystal oscillator with improved tolerance to radiation such as X-rays includes: a container body; a quartz crystal blank accommodated in a first recess formed on one main surface of the container body and hermetically encapsulated in the first recess by a metal cover; and an IC chip that integrates electronic circuits including at least an oscillator circuit using the crystal blank and is accommodated in the second recess formed on the other main surface of the container body. The IC chip is fixed to the bottom surface of the second recess by flip-chip bonding such that a circuit formation plane of the IC chip is opposed to the bottom surface of the second recess. A radiation protective film is formed on the main surface other than the circuit formation plane of the IC chip. | 06-21-2012 |
20120146738 | PIEZOELECTRIC OSCILLATOR - Provided is a piezoelectric oscillator which can easily perform adjustment of oscillation frequency at a low cost and which can restrain frequency changes due to power supply voltage variations. The piezoelectric oscillator includes a frequency adjustment circuit and an oscillator circuit and is configured such that: a cathode of a variable-capacitance diode D | 06-14-2012 |
20120139648 | TEMPERATURE-CONTROLLED CRYSTAL OSCILLATING UNIT AND CRYSTAL OSCILLATOR - A temperature-controlled crystal oscillating unit and oscillator are provided, which can stabilize an output frequency thereof, have firmness against shock of falling etc., and are suitable for miniaturization and mass production. A crystal blank for the temperature-controlled crystal oscillating unit is formed by an inner region which is an oscillating plate; an outer region which surrounds the periphery of the inner region; and a connection portion which connects the inner region with the outer region. Electrodes are formed on two surfaces of the inner region, and a heater and a temperature sensor are disposed to surround the periphery of the electrode on one surface of the inner region where the electrode is formed thereon. The electrodes, the heater and the temperature sensor are respectively connected with terminals on the outer region by leads. A contact area between the temperature sensor and a crystal is increased. | 06-07-2012 |
20120133447 | SURFACE MOUNT TYPE CRYSTAL UNIT - An object of the invention is to provide a surface mount oscillator that can suppress a change with the lapse of time in frequency characteristics. A surface mount type crystal unit | 05-31-2012 |
20120112604 | ULTRASONIC PROBE AND MANUFACTURING METHOD THEREOF - A manufacturing method of an ultrasonic probe that has a signal foil made of a copper foil patterned by an additive method is provided. The manufacturing method includes preparing a base material and forming an insulating layer on a surface of the material, patterning the insulating layer by exposure, development, and peeling according to a lithographic technique, forming a cavity reaching an upper surface of the base material in the insulating layer along the patterning, forming a signal foil by performing plating in the cavity in the order of copper plating and solder plating, and demolding the formed signal foil from the cavity. | 05-10-2012 |
20120105110 | Signal level adjusting device and high-frequency apparatus - To provide, in a frequency synthesizer including: a variable attenuator provided at a subsequent stage of a voltage controlled oscillator; a detector; and a control unit outputting a control voltage for adjusting an attenuation amount of the variable attenuator via a digital/analog converter in accordance with a detection voltage, a technology with which a spurious due to a change in an output of the digital/analog converter can be suppressed. A low-pass filter is provided between an output side of a digital/analog converter and a variable attenuator to cut a frequency component corresponding to an overshoot generated when an output of the digital/analog converter is changed. Further, a period of time from when a control unit outputs a control voltage to when it reads a signal level detected by a detector is set to a period of time longer than a time constant of the low-pass filter determined by a cut-off frequency of the low-pass filter so that no influence is exerted on an operation of automatically controlling the signal level. | 05-03-2012 |
20120081187 | Oscillator - An oscillator outputs a sine wave with high purity capable of reducing phase noise. In a Colpitts oscillator circuit using a transistor as an amplifying part, a quartz-crystal resonator for waveform shaping is provided outside or inside an oscillation loop. A quartz-crystal resonator for oscillation and the quartz-crystal resonator for waveform shaping are formed, with an electrode pair and an electrode pair being provided on a common quartz-crystal piece. A separation distance between the electrode of the quartz-crystal resonator and the electrode of the quartz-crystal resonator is set large so that they are not elastically coupled, or even when they are elastically coupled, their coupling degree is weak, and an inductor causing parallel resonance with a parallel capacitance of the quartz-crystal resonator is provided. | 04-05-2012 |
20120074816 | Piezoelectric Device - The piezoelectric device ( | 03-29-2012 |
20120073376 | Ultrasonic probe - The shapes of reflecting parts in a hermetically sealed container are inclined to prevent generation of an unnecessary echo. In a short-axis oscillating ultrasonic probe, a piezoelectric element group arranged along a long-axis direction and having an acoustic lens on an ultrasonic wave transmitting/receiving surface, is provided on a rotary holding table housed in a hermetically sealed container. An ultrasonic wave transmitted and received to/from the ultrasonic wave transmitting/receiving surface of the piezoelectric element group is mechanically scanned in the short-axis direction of the piezoelectric element group by rotating and oscillating the rotary holding table in the short-axis direction, and a liquid serving as an acoustic medium is filled in the hermetically sealed container. The surface shapes of the reflecting parts in the hermetically sealed container are inclined so that, when an unnecessary ultrasonic wave travelling in the hermetically sealed container and exceeding a range of the acoustic lens after propagating in the long-axis direction or the short-axis direction between the surface of the acoustic lens and the inner periphery of the hermetically sealed container, is reflected on any of the reflecting parts, the unnecessary ultrasonic wave after being reflected does not return to between a surface of the acoustic lens and an inner periphery of the hermetically sealed container. | 03-29-2012 |
20120070850 | Method for detecting microorganisms and microorganism detecting apparatus - It is possible to determine the presence of bacteria in a sample solution in a shorter period of time without changing a conventional incubating method. Bacteria in a sample solution are incubated in, for example, a sterilized agar medium | 03-22-2012 |
20120068790 | Elastic wave device - There is provided an elastic wave device that is capable of suppressing deterioration in flatness of a frequency characteristic in a pass frequency band yet has excellent ESD resistance. At positions apart from a crossing area of electrode fingers | 03-22-2012 |
20120068579 | Method for Manufacturing a Piezoelectric Device and the Same - The present disclosure provides a method for manufacturing piezoelectric devices by using a base wafer having through-holes manufactured in precise size. In the method for manufacturing a piezoelectric device comprises: a step of: forming an anticorrosive film (S | 03-22-2012 |
20120068578 | Piezoelectric Device - A piezoelectric device ( | 03-22-2012 |
20120062336 | Duplexer - Disclosed is a receiving side filter in a pass band of a duplexer's transmitting side filter. Output balancing is performed by the receiving side filter, which includes a longitudinal mode resonator type filter. A pass band of the receiving side filter is set on a lower band side than the pass band of the transmitting side filter. Between an antenna port and a pair of balanced reception ports, first and second ladder-type filters are provided. The first includes a series arm and a parallel arm, each formed of a SAW resonator and a longitudinal mode resonator type filter. The second ladder-type filter has series arms, formed of SAW resonators respectively provided in signal paths that connect the respective balanced reception ports and the longitudinal mode resonator type filter, and a parallel arm formed of a SAW resonator and connecting between these signal paths. | 03-15-2012 |
20120056514 | Mesa-Type At-Cut Quartz-Crystal Vibrating Piece and Quartz-Crystal Device - To provide an AT-cut quartz-crystal vibrating piece in which size of the vibrating unit is adjusted to appropriate value, so that the unnecessary vibration is inhibited and degradation of its characteristics is prevented. A mesa-type AT-cut quartz-crystal vibrating piece for vibrating at 38.400 MHz comprising a rectangular excitation unit ( | 03-08-2012 |
20120043859 | Method of Manufacturing the Piezoelectric Device and the Same - To provide a piezoelectric device prevented from overflowing of sealing materials. The piezoelectric device ( | 02-23-2012 |
20120032563 | Mesa-Type At-Cut Quartz-Crystal Vibrating Piece and the Quartz-Crystal Device - The present disclosure provides a mesa-type AT-cut quartz-crystal vibrating piece, in which amount of the vibrating unit is adjusted to appropriate amount, in order to inhibit unnecessary vibration and to prevent degradation. The mesa-type AT-cut quartz-crystal vibrating piece ( | 02-09-2012 |
20120032562 | At-Cut Quartz-Crystal Device and Methods for Manufacturing Same - The present disclosure provides a manufacturing method of a quartz-crystal device, in which its lid and base is manufactured with smaller thermal expansion coefficient between AT-cut quartz-crystal wafer. The method for manufacturing a quartz-crystal device comprises the steps of: preparing an AT-cut quartz-crystal wafer ( | 02-09-2012 |
20120032561 | Piezoelectric Device With Tuning-Fork Type Piezoelectric Vibrating Piece - To provide the piezoelectric device and the manufacturing method thereof, in which the quartz-crystal side surface electrodes and the base side surface electrodes are ensured to be electrically connected without disconnection. The piezoelectric device ( | 02-09-2012 |
20120012428 | Brake mechanism, transport apparatus and industrial apparatus - A brake mechanism is constituted to have: an electromotive actuator which suppresses a rotation of a disk by moving a first pad toward a second pad to sandwich and press the disk between the first pad and the second pad; a pressing force setting section outputting a set signal to set a pressing force of the pad to the disk; a plurality of piezoelectric elements provided at different places from each other in the first pad or the second pad, the plurality of piezoelectric elements detecting a stress of the pad; a signal processing part which processes electric signals obtained from the plurality of piezoelectric elements and generates a detection signal of a pressing force, the detection signal corresponding to a pressing force of the pad to the disk; and a computing part which obtains a deviation between the set signal and the detection signal, computes an operation signal of the electromotive actuator based on the deviation, and then outputs the operation signal. | 01-19-2012 |
20110316522 | Sensing device - To provide a sensing device that holds a piezoelectric sensor and a channel forming member placed on the sensor in a closely contacted state while maintaining a shape of space of a passage space formed inside the device. In a sensing device | 12-29-2011 |
20110316391 | TUNING-FORK-TYPE PIEZOELECTRIC VIBRATING PLATE AND PIEZOELECTRIC DEVICE - A tuning-fork-type piezoelectric vibrating plate with a suppressed CI value and a piezoelectric device using thereof are provided. The tuning-fork-type piezoelectric vibrating plate includes: a base section formed by a piezoelectric material; and a pair of vibrating arms extended from the base section along a predetermined direction. On a front surface and a back surface of the vibrating arms, a first excitation groove is formed at the base section side, a second excitation groove is formed at a tip side of the vibrating arms, and a partition section is formed to separate the first excitation groove from the second excitation groove. A length from the base section side of the first excitation groove to the tip side of the second excitation groove in the predetermined direction is L | 12-29-2011 |
20110303347 | METHOD FOR MANUFACTURING SURFACE MOUNTING CRYSTAL RESONATOR - A method for manufacturing a surface mounting crystal resonator is provided, in which the bonding strength of low melting point glass is increased and the productivity is also increased. The surface mounting crystal resonator includes a set of container components having at least a crystal sheet | 12-15-2011 |
20110260586 | Piezoelectric Device with Tuning-fork type Piezoelectric Vibrating Piece - The piezoelectric device comprises a piezoelectric vibrating piece having a base portion, a pair of vibrating arms extending in a specified direction from the base portion, and a pair of connection portions disposed on the pair of the supporting arms; a package having a bottom surface which accommodates the piezoelectric vibrating piece and side faces surrounding the bottom surface, in which a pair of electrode pads corresponding to the connection portions are formed on the bottom surface; and adhesive for bonding the pair of the electrode pads with the pair of connection portions. One electrode pad and the other electrode pad, with adhesive applied to the electrode pads, are shifted with respect to each other in a predetermined direction. | 10-27-2011 |
20110241785 | Reference signal oscillator - A rubidium oscillator or a cesium oscillator is used as a high stability oscillator, and an OCXO being a metastable oscillator which is inferior in a long-term frequency stability compared with the above oscillators but has a high short-term frequency stability is used as a backup. There is prepared a table in which an elapsed time since an occurrence of an abnormality in the high stability oscillator and weighting (use ratio) of use of the both oscillators is corresponded, and by using this table, after the high stability oscillator recovers, an oscillation frequency of the metastable oscillator is used by 100% initially, but thereafter the weighting (use ratio) of use of the metastable oscillator is made smaller and the use ratio of the high stability oscillator is made larger in stages. | 10-06-2011 |
20110234325 | Voltage controlled temperature compensated crystal oscillator - The invention provides a multifunctional VC-TCXO that, as well as promoting miniaturization, selectively configures the functions as needed, and furthermore, is suitable for power savings. In a VC-TCXO provided with a chamber body that accommodates an IC chip and a crystal blank, the IC chip has; basic functions consisting of a first oscillator output function, and a temperature compensating function, and additional functions comprising of a second oscillator output function, an operation/non-operation function of the first oscillator output, and a temperature voltage output function, and basic IC terminals and additional IC terminals for these functions, and basic mounting terminals, and additional mounting terminals. Two of the additional IC terminals are two functions among the additional functions, which are selectively connected according to changes in a circuit pattern of a surface layer of the circuit formation surface, and the basic mounting terminals are provided on four corner portions of an outside bottom surface of the chamber body, and the two additional mounting terminals that are connected to the two additional IC terminals are provided on a central portion of a long side facing the outside bottom surface. | 09-29-2011 |
20110223620 | Method of detecting microorganisms and microorganism detecting apparatus - It is possible to determine the presence of bacteria in a sample solution in a shorter period of time without changing a conventional incubating method. Bacteria in a sample solution are incubated in, for example, a sterilized agar medium | 09-15-2011 |
20110221538 | Piezoelectric oscillator - To provide a technique capable of suppressing electric energy by a fundamental wave vibration and reducing phase noise in a piezoelectric oscillator using an overtone of a thickness shear vibration in a piezoelectric piece. An excitation electrode portion in an electrode | 09-15-2011 |
20110221490 | PLL apparatus - There is provided an art to prevent an unstable operation due to temperature in a PLL apparatus in which a proper range of an amplitude level of an external reference frequency signal is specified and a control voltage is supplied to a voltage-controlled oscillator according to whether the amplitude level falls within the proper range or not. The PLL apparatus includes: a switching unit switching a signal that is to be supplied to a control voltage output unit between a signal of a phase comparison unit and a preset signal of a preset signal output unit; a protection circuit provided between a signal path of a reference frequency signal and a ground and having diodes that are connected in inverse parallel in order to regulate an amplitude level of the reference frequency signal; a temperature detection unit detecting an atmospheric temperature of the protection circuit; and a level detection unit detecting the amplitude level of the external reference frequency signal, and threshold values as references for the switching are set according to the detected temperature, thereby coping with a change in the amplitude level due to a temperature characteristic of the diodes. | 09-15-2011 |
20110214265 | Piezoelectric component and manufacturing method thereof - An object of the present invention is to; miniaturize, increase the capacity, and reduce the price of piezoelectric components. The present invention relates to a piezoelectric component and a manufacturing method thereof, characterized in that: there are bonded and laminated at least two or more piezoelectric elements in which comb-teeth electrodes, wiring electrodes having element wirings that are arranged adjacent to the comb-teeth electrodes, and electrode terminals connected to the wiring electrodes, are formed on a principal surface of a plurality of piezoelectric substrates, while forming hollow sections between the respective piezoelectric elements; through electrodes are formed in the respective piezoelectric substrates so as to pass therethrough; the through electrodes are connected to the electrode terminals; and the piezoelectric substrates are sealed by a resin sealing layer. | 09-08-2011 |
20110210649 | CRYSTAL RESONATOR FOR SURFACE MOUNTING - The crystal resonator for surface mounting includes: a single-layer base substrate, including a pair of crystal holding terminals on a major face; a crystal piece, including an excitation electrode on two major faces, and electrically and mechanically connected to the crystal holding terminals; and a concave metal cover, including an opening end face bonded to an outer peripheral surface of the base substrate through curing of a liquid resin. The end face electrode is electrically connected through an electrically conducting path of the outer peripheral surface extended from the crystal holding terminals, and the crystal resonator for surface mounting is disposed as a structure that includes an end face region of two positions at least being opposite to the electrically conducting path in the opening end face of the metal cover spaced from a front end of a protruding portion through the protruding portion disposed on the opening end face. | 09-01-2011 |
20110204753 | PIEZOELECTRIC DEVICE AND MANUFACTURING METHOD THEREOF - A piezoelectric device and a manufacturing method thereof are provided. The piezoelectric device having a piezoelectric vibration sheet ( | 08-25-2011 |
20110193637 | Surface mounted oven controlled type crystal oscillator - The invention relates to an oven controlled crystal oscillator for surface mounting with reduced height (low profile). The oven controlled crystal oscillator for surface mounting comprises: a flat first substrate made of ceramic and on which are installed a crystal device and a heat resistor; and a second substrate made of a glass epoxy resin which is quadrangular in plan view and which faces the first substrate and has a larger external shape in plan view than the first substrate. The second substrate has an opening into whose center the crystal device is inserted, and has terminal sections on four locations corresponding to the surface outer periphery of the first substrate and the peripheral surfaces of the opening in the second substrate, and the terminal sections of the first substrate and second substrate are connected by solder. A front end side head section of the crystal device inserted into the opening section of the second substrate is positioned inside the open surface of the opening section, and from terminal sections provided at four locations on the second substrate, conductive paths extend via the outside surface of the second substrate to external terminals formed on the outside bottom surface of the second substrate. | 08-11-2011 |
20110191995 | Method for manufacturing piezoeletric resonator - To provide a method for manufacturing a piezoelectric resonator which can conduct frequency matching with high reliability when performing rough adjustment of the frequency by adjusting the shape of a piezoelectric oscillating piece before forming an electrode film, and thereby it becomes possible to avoid reduction of the yield. Etching for forming the shape of a piezoelectric oscillating piece, and etching for forming grooves are conducted simultaneously, and after forming the grooves, the shape formation of the piezoelectric oscillating piece is started again from the same depth as the groove in a state of covering the groove with a metal film, and after the shape formation, matching of frequency is conducted by etching the side surface of the piezoelectric oscillating piece in succession. By composing such a structure, it is possible to conduct rough adjustment of frequency at a low etching rate so that the frequency matching can be performed with no due difficulty and with high accuracy. | 08-11-2011 |
20110180311 | SOLDER, ELECTRONIC PART, AND METHOD OF FABRICATING ELECTRONIC PART - A solder material with favorable mechanical properties and high corrosion resistance is provided. The solder material is not apt to be melted in a re-heating process after the soldering process is performed. The solder material includes first solder powder, Cu powder, and a flux. The first solder powder contains Cu, Si, Ti, and Sn. Here, Cu accounts for 7 wt %˜9 wt %, Si accounts for 0.001 wt %˜0.05 wt %, Ti accounts for 0.001 wt %˜0.05 wt %, and the rest is Sn. The Cu powder is coated by Ag. The flux is mixed with the first solder powder and the Cu powder. | 07-28-2011 |
20110169533 | FREQUENCY SYNTHESIZER - The provision of a technique capable of determining a state where PLL control does not operate normally instantly or in advance in a frequency synthesizer that frequency-divides, A/D converts, and quadranture-detects a frequency signal from a voltage controlled oscillating unit, and extracts a rotation vector rotating at a frequency difference between the frequency signal used for the detection and the A/D converted frequency signal, and integrates a difference between a frequency of the above rotation vector and a set frequency to set an integration result as a control voltage to the voltage controlled oscillating unit. | 07-14-2011 |
20110156823 | Piezoelectric oscillator - There is provided a temperature compensated piezoelectric oscillator which excels in frequency stability and has a good electronic noise characteristic, and with which a circuit can be structured simply. An auxiliary oscillator unit | 06-30-2011 |
20110156529 | Surface mounted crystal resonator - An object of the invention is to provide a surface mounted resonator that improves impact resistance by the shape of a mounting terminal provided on an outside bottom face of a stacked resonator. A surface mounted crystal resonator is provided with a plurality of mounting terminals electrically connected to a hermetically sealed crystal piece at both ends of an outside bottom face having a rectangular shape long in the lengthwise direction, the mounting terminals having the same external dimensions with a total dimension of the mounting terminals in a lengthwise direction of the outside bottom face being 70% or more [but less than 100%] of a dimension in the lengthwise direction of the outside bottom face. Respective facing sides of the mounting terminals facing each other in a central area of the outside bottom face are formed curved in a convex shape such that a curvature thereof decreases gradually. | 06-30-2011 |
20110149464 | Voltage controlled variable capacitor and voltage controlled oscillator - There is provided a voltage variable capacitor that can be formed on a semiconductor circuit, has a large variable ratio of capacitances and a high Q value, and achieves a highly linear relation of a control voltage and an oscillation frequency when the capacitor forms a VCO. The voltage variable capacitor is formed of a plurality of MOS capacitance elements (CM | 06-23-2011 |
20110148538 | Crystal device - An object is to provide a crystal device in which an influence due to an electroconductive adhesive is reduced, and vibration characteristics of a crystal piece are favourably maintained. A configuration is such that in a crystal device including: a container main body having a concavity, with a crystal retention terminal formed in a bottom face of the concavity, and with a mounting terminal that is electrically connected to the crystal retention terminal formed on an outer bottom face; a crystal piece accommodated in the concavity, with an excitation electrode formed on both main faces, and with a support electrode that is electrically connected to the excitation electrode using a connecting electrode, formed on both sides of one end portion, and with the support electrode bonded to the crystal retention terminal with an electroconductive adhesive; and a cover that is connected to an open end face of the container main body and hermetically seals the crystal piece, there is provided a jetty being a main face of the crystal piece, and that protrudes on a periphery of the support electrode, and the jetty is formed integral with the crystal piece. | 06-23-2011 |
20110140572 | Crystal device - An object is to provide a crystal device that uses a mesa-structure crystal piece in which frequency adjustment is possible. A configuration is such that in a crystal device having: a crystal piece having a thick portion and a thin portion, with an excitation electrode formed on both main faces of the thick portion, and a lead out electrode electrically connected to the excitation electrode, formed on an end portion; a container main body having a concavity for accommodating the crystal piece; and a cover that is connected to an open end face of the container main body and hermetically seals the crystal piece, a frequency adjustment metal film which is electrically isolated from the excitation electrode and made independent, is formed on the thin portion of the crystal piece. | 06-16-2011 |
20110102107 | FILTER, PORTABLE TERMINAL AND ELECTRONIC COMPONENT - An object is to obtain a steep and large attenuation amount in attenuation bands close to each other out of a band of a TV wave and to provide a filter in which the use number of inductors is reduced thereby to be able to contribute to downsizing of a device. Elastic wave resonators of a plurality of parallel arms for each forming plurality of attenuation band are connected to the same electric potential point in a signal path without aid of an inductor. Otherwise, a series circuit of a plurality of element parts generating series resonance is connected in a signal path as a parallel arm. Therefore, a large attenuation amount can be obtained in each of the plural attenuation bands, but a region equivalent to what is called a zero point exists between adjacent poles. However, there can be obtained a characteristic in which steep attenuations occur in both sides of the zero point even if the zero point exists. Sets of elastic wave resonators (sets of resonators) connected to the same potential points or parallel arms constituted by the series circuits are connected in a signal path in a plurality of stages, and an inductor for inverting a phase intervenes between the stages. | 05-05-2011 |
20110080228 | Voltage controlled oscillator - To provide a voltage controlled oscillator capable of being treated as a lumped constant circuit, having small size and capable of obtaining an oscillation frequency in a high frequency band. A resonance part | 04-07-2011 |
20110080226 | Voltage controlled oscillator and electronic component - To provide a voltage controlled oscillator having small size and capable of obtaining a low phase noise characteristic over a large span of adjustable range of frequency. A quartz crystal having a characteristic (dielectric loss tangent: tan δ) better than that of fluorocarbon resin, LTCC or the like conventionally used as a substrate of a resonance part | 04-07-2011 |
20110080223 | Voltage controlled oscillator - There is provided a voltage controlled oscillator that is compact and can be manufactured at low cost. The voltage controlled oscillator is structured to include: a resonance part including a variable capacitance element and an inductance element, the variable capacitance element having a capacitance that varies according to a control voltage for frequency control input from an external part, and a series resonant frequency of the resonance part being adjusted according to the capacitance; an amplifying part amplifying a frequency signal from the resonance part; and a feedback part including a capacitance element for feedback and feeding the frequency signal amplified by the amplifying part back to the resonance part to form an oscillation loop together with the amplifying part and the resonance part, wherein the amplifying part is provided in an integrated circuit chip, and the resonance part and the capacitance element for feedback are formed as circuit components separate from the integrated circuit chip. The circuit components are selected according to an oscillation frequency. | 04-07-2011 |
20110080222 | Voltage controlled oscillator - There is provided a voltage controlled oscillator using a Colpitts circuit capable of suppressing deterioration (decrease) in variable range (adjustable range) of an output frequency due to the influence of an inductance component on a conductive line, which connects a connection point between two capacitors of a feedback part and an emitter of a transistor. In a VCO using a Colpitts circuit, with respect to capacitors | 04-07-2011 |
20110074475 | Frequency synthesizer - There is provided a frequency synthesizer capable of improving phase noise. A sinusoidal signal with a frequency set by a frequency setting part is output as a digital signal from a set signal output part, and the digital signal is D/A-converted. A difference between a sinusoidal signal with a frequency corresponding to an output frequency of a voltage controlled oscillating part and a sinusoidal signal output from a D/A converting part is amplified by a differential amplifier, and an amplified signal is input via an A/D converting part to a means for extracting a phase difference between the aforesaid sinusoidal signals. A voltage corresponding to a signal being the result of integration of the phase difference is input as a control voltage to the voltage controlled oscillating part. Then, a gain of the differential amplifier is set larger than a maximum value of phase noise degradation of the A/D converting part, whereby the phase noise degradation of the A/D converting part is cancelled. | 03-31-2011 |
20110064614 | PIEZOELECTRIC RESONATOR AND SENSING SENSOR - Provided is a piezoelectric resonator having high frequency stability and a sensing sensor using the piezoelectric resonator. A piezoelectric resonator has a first oscillation area which is provided in a piezoelectric piece and from which a first oscillation frequency is taken out. A second oscillation area which is provided in an area different from the first oscillation area via an elastic boundary area and from which a second oscillation frequency is taken out. Excitation electrodes are provided on one surface side and another surface side of the oscillation areas across the piezoelectric piece, and a frequency difference between the first oscillation frequency and the second oscillation frequency is not less than 0.2% nor greater than 2.2% of these oscillation frequencies. | 03-17-2011 |
20110063040 | Method of manufacturing piezoelectric resonator, piezoelectric resonator, and electronic component - To provide a piezoelectric resonator in which a casing houses a tuning-fork piezoelectric resonator element and whose failure occurrence caused when shavings of adjustment films scatter and adhere to excitation electrodes is prevented. In a method of manufacturing a quartz-crystal resonator in which a casing | 03-17-2011 |
20110049093 | Stacked crystal resonator and manufacturing method thereof - An object of the invention is to provide a method of manufacturing a stacked crystal resonator whereby a large number of stacked crystal resonators formed on a wafer can be easily broken away from the wafer, and the risk of damage to the outside surfaces and the like of the stacked crystal resonators is reduced. There is formed a framed crystal plate connected to a first wafer by a first support section, a cover connected to a second wafer by a second support section, and a base connected to a third wafer by a third support section, and a thickness of at least one of the first support section through third support section is thinner than a thickness the connected wafer. | 03-03-2011 |
20110043078 | Piezoelectric component and manufacturing method thereof - A piezoelectric component that has a superior level of molding pressure resistance while reducing the height and size thereof, is manufactured at low cost by using a photosensitive resin film to which is added a nano filler or a mica filler. The invention relates to a piezoelectric component and a manufacturing method of a piezoelectric component comprising: a piezoelectric substrate; a comb electrode formed on a main surface of the piezoelectric substrate; a piezoelectric device composed of wiring electrodes having device wiring sections disposed adjacent to the comb electrode; an insulation layer formed on an upper surface of the device wiring sections; a rewiring layer formed on an upper surface of the insulation layer; a protective film layer that is composed of an inorganic material and that covers the entire upper surface of the rewiring layer excluding the comb electrode; an outer periphery wall section formed by laminating a photosensitive resin film to which is added a nano filler onto the protective film layer; a ceiling section formed by laminating the photosensitive resin film to which is added a nano filler or a mica filler onto top openings of the outer periphery wall section; and electrode posts formed so as to pass through the outer periphery wall section and the ceiling section. Here the photosensitive resin film to which is added a nano filler is composed of a photosensitive resin to which is added an inorganic nano filler with a mean particle size of 1.0 nm or less, and has an elastic modulus of 3.0 GPa or greater. | 02-24-2011 |
20110032051 | DUPLEXER - Disclosed is a miniaturized duplexer having a good isolation characteristic. A duplexer having a high band side filter and a low band side filter that are each formed in a ladder-type filter provided on a common piezoelectric substrate is provided with a first elastic wave resonator to be included in one of these filters, a second elastic wave resonator to be included in the other of the filters, and a first additional grating reflector provided between these resonators to reflect an elastic wave leaked from a grating reflector of the first elastic wave resonator, and in which an additional grating reflector is not provided on a side opposite to the second elastic wave resonator in the first elastic wave resonator. | 02-10-2011 |
20110019296 | Optical filter - An object of the invention is to provide an optical filter that prevents an optical thin film formed on an optical plate from being partially removed, and prevents micro-cracks occurring in an outer peripheral edge section of a principle surface of the optical plate, and that has a high yield rate. An optical filter is provided with an optical plate which has a chamfered section formed on an outer peripheral edge section of one principle surface of the optical plate, and has isotropy with respect to wet-etching, and the chamfered section is of an arc shape which is cross-sectionally concave in an inward direction of the optical plate, and is formed by means of wet-etching. A crossing angle between the one principle surface and a concave surface where the chamfered section is formed, and a crossing angle between the concave surface and a side surface of the optical plate 3 where the chamfered section is formed, namely, crossing angles θG and θH are respectively 100° or greater and less than 180° . | 01-27-2011 |
20110001523 | FREQUENCY SYNTHESIZER - Provided is a frequency synthesizer capable of fine setting over a wide band and having a wide frequency pull-in range. A sine wave signal of an output frequency of a voltage controlled oscillating part is quadrature-detected, and in a PLL utilizing a vector rotating at a frequency (velocity) equal to a difference from a frequency of a frequency signal used for the detection, a frequency pull-in means integrates a first constant for increasing the output frequency as a pull-in voltage when a control voltage from the PLL to the voltage controlled oscillating part is larger than a prescribed set range, and integrates a second constant for decreasing the output frequency as the pull-in voltage when the control voltage is smaller than the set range. Then, an adding means adds the control voltage from the PLL and the pull-in voltage from the frequency pull-in means to output an addition result to the voltage controlled oscillating part. | 01-06-2011 |
20100329932 | Sensing device - To provide a sensing device that measures a substance to be sensed while letting a sample solution flow and has improved accuracy in detecting the substance to be sensed. The sensing device includes: a channel forming member | 12-30-2010 |
20100329928 | Sensing device - To provide a sensing device using a piezoelectric sensor having an oscillation area for detection and an oscillation area for reference and capable of achieving a high measurement sensitivity by improving shapes of excitation electrodes. On a quartz-crystal piece | 12-30-2010 |
20100327987 | Method of manufacturing crystal element and crystal resonator manufactured thereby - The present invention relates to a crystal element manufacturing method for manufacturing a plurality of crystal elements at a wafer level, and to a crystal resonator manufactured by this method. The method is comprised when the frequencies of the crystal elements are adjusted by adjusting the thickness of a crystal wafer that constitutes the crystal element in two stages by partial wet etching, the thicknesses of a large number of the step sections are coarse-adjusted in a first stage by collectively subjecting the step sections to partial wet etching, and then variations in the thicknesses of each group of a small number of the step sections are fine-adjusted in a second stage by collectively subjecting the step sections to partial wet etching. Alternatively, variations in the thicknesses of a small number of the step sections are coarse-adjusted and made uniform by means of partial wet etching, and then in a second stage, the thicknesses of a group of a plurality of the step sections having equal thicknesses are fine-adjusted by collectively subjecting the step sections to partial wet etching. Step sections having different areas are respectively formed on both of the front and back surfaces of a crystal wafer; at a crystal wafer level, these step sections are first collectively subjected to partial wet etching and thereby coarse-adjusted; then the thickness of each of the step sections is individually fine-adjusted by means of partial wet etching; and thereby the tact (the amount of operation time) required in partial wet etching is reduced. | 12-30-2010 |
20100327706 | Stacked crystal resonator - An object of the present invention is to provide a crystal resonator capable of maintaining its resonating characteristic and ensuring electrical connections between end surface electrodes using a simple method. Provided is a stacked crystal resonator including: a framed crystal plate, a frame section of which surrounds a resonating section, and to which both of these resonating section and frame section are connected by connecting sections; a first metallic film and second metallic film formed on both of the principle surfaces of the frame section of the framed crystal plate; and a base and cover stacked on both of the principle surfaces of the framed crystal plate. A crystal plate end surface electrode, which is electrically connected to the first metallic film, is electrically connected to a crystal plate auxiliary electrode; the crystal plate auxiliary electrode is electrically connected by a eutectic alloy while facing a base auxiliary electrode; the width of the frame section of one side on one end side of the framed crystal plate where the crystal plate auxiliary electrode is formed, differs from the width of the frame section of at least one other side; and a blocking film which blocks flow of the eutectic alloy to exciting electrodes, is provided on the conducting paths. | 12-30-2010 |
20100321068 | Frequency Synthesizer - An object of the present invention provides a frequency synthesizer having a broad frequency entraining range which can finely set a frequency over a broad band by a novel principle. | 12-23-2010 |
20100319736 | Sensing device - To provide a sensing device having a high processing power and capable of high-accuracy measurement. It is determined whether or not an oscillation frequency is stabilized while a buffer solution is supplied to a quartz-crystal resonator | 12-23-2010 |
20100319438 | Sensing device - To provide a sensing device capable of easily sensing a substance to be sensed with high accuracy. When sensing, by supplying a sample solution to an absorption layer | 12-23-2010 |
20100314355 | Ultrasonic probe - There is provided a crystal resonator (crystal element) in which the probability of chipping occurring in separation is small when there is one supporting section with respect to a frame section of a crystal wafer, and inclined surfaces due to the anisotropy of etching are eliminated. The present invention relates to a crystal resonator manufacturing method such that an AT-cut crystal wafer is etched, a large number of rectangular crystal elements are joined with frame sections by supporting sections, and the crystal elements are mechanically cut away from the frame sections. On both sides of the +X-axis one end section of the crystal element, at least the outer side surface has a planarly tapered projection having a triangular inclined surface with an apex in the −X-axis direction, and the tip end of the projection has processing traces of the etching in the +X-axis direction. | 12-16-2010 |
20100313636 | Sensing device and sensing method - To provide a sensing device and a sensing method that, by a simple method of liquid supply to first and second excitation electrodes, makes it possible to make a first oscillation area adsorb an adsorption substance that adsorbs a substance to be sensed in a sample solution and a blocking substance that prevents the adsorption of a substance and to make the electrode in a second oscillation area adsorb the blocking substance. By the supply of a solution containing the adsorption substance to a first liquid storage space | 12-16-2010 |
20100301708 | Piezoelectric component and manufacturing method therof - An object of the present invention is to manufacture, at a low cost, a piezoelectric component that has a superior level of molding pressure resistance and has its height reduced. The present invention relates to a piezoelectric component and a manufacturing method thereof comprising: a piezoelectric substrate; piezoelectric devices formed on a principle surface of the piezoelectric substrate; a device wiring section formed on the principle surface of the piezoelectric substrate; a protective film that has a terminal electrode connected to the wiring section and is formed on an upper surface of the wiring section; a rewiring layer that is formed on an upper surface of the protective film and that is connected to a wiring section of an electrode, which is different from the above electrode; a buffer layer that is composed of an inorganic material and that covers an entire upper surface of the rewiring layer excluding the piezoelectric devices; an outer periphery wall that is composed of a photosensitive resin film and is formed on an upper surface of the buffer layer; a first ceiling layer that is composed of a photosensitive resin film having a mica filler added thereto and is formed on an upper surface of the outer periphery wall; a mesh-shaped member that is composed of an insulating material and is installed on an upper surface of the first ceiling layer; a second ceiling layer that is composed of a photosensitive resin film having a mica filler added thereto and is formed so as to cover an upper surface of the mesh-shaped member; and through electrodes that are formed so as to pass through the first and second ceiling layers, the outer periphery wall, and the mesh-shaped member, thus between the outer periphery wall, the first ceiling layer, and the principle surface of the piezoelectric substrate, there is formed a hollow section that accommodates the piezoelectric devices. | 12-02-2010 |
20100292935 | Sensing Sensor and Concentration Measuring Device - An object of the present invention is to enable a user, when measuring a sensing target substance in fluid using a crystal sensor (sensing sensor) using a crystal vibrator whose natural frequency is varied by an absorption of the sensing target, to easily and accurately grasp information peculiar to the crystal sensor, for instance, information regarding a quality thereof. | 11-18-2010 |