| 27th week of 2009 patent applcation highlights part 31 |
| Patent application number | Title | Published |
|---|
| 20090168187 | Lenticular Lens Array Element - A lens element comprising: a rear substrate having a front surface provided with a surface relief having a plurality of zones each capable of providing a lens effect; a front substrate disposed in front of the rear substrate and having a rear surface provided with a surface relief having a plurality of zones each capable of providing a lens effect, the zones of the surface reliefs provided on the rear substrate and the front substrate having the same spatial arrangement over the area of the lens element; and solid or liquid, isotropic, intermediate material disposed between the front surface of the rear substrate and the rear surface of the front substrate, the intermediate material having a refractive index different from the refractive index of each of the rear substrate and the front substrate. This construction reduces the degree of Fresnel reflection which would otherwise degrade the optical performance. | 2009-07-02 |
| 20090168188 | IMAGE FORMING APPARATUS, OPTICAL SCANNING DEVICE, AND PLASTIC LENS - A plastic lens molded in a mold having two first molding blocks and two second molding blocks. The first molding blocks transfer light incidence and emission surfaces. The second molding blocks are provided to both ends of the first molding blocks, disposed parallel to an optical axis and facing each other, and transfer non-light-passing surfaces. At least one of the second molding blocks includes an elongated slit-like ventilation hole having a length of a light effective range or longer and extending in a main scanning direction of the light incidence and emission surfaces along positions equidistant from the light incidence and emission surfaces. Through the ventilation hole, air is sprayed onto molten resin in a process of resin cooling and solidification to facilitate cooling of the resin. | 2009-07-02 |
| 20090168189 | Projection optical system, exposure apparatus, and exposure method - A projection objective includes at least four curved mirrors, which include a first curved mirror that is a most optically forward mirror and a second curved mirror that is a second most optically forward mirror, as defined along a light path. In addition, an intermediate lens element is disposed physically between the first and second mirrors, the intermediate lens element being a single pass type lens. The objective forms an image with a numerical aperture of at least substantially 1.0 in immersion. | 2009-07-02 |
| 20090168190 | Imaging Device - It is an object of the present invention to provide an imaging device that, even if the optical axis of the multifocal lens has a deviation resulting from its decentered surfaces, can prevent an image from being deteriorated by the low precision lens. The imaging device | 2009-07-02 |
| 20090168191 | PHOTOMASK INSPECTION APPARATUS - According to one aspect of the present invention, there is provided a photomask inspection apparatus which observes a pattern provided on a mask substrate of a mask to inspect the mask including an object lens, and a liquid that is present between a last lens in the side closer to the mask of the object lens and the mask. | 2009-07-02 |
| 20090168192 | OPTICAL SYSTEM AND OPTICAL APPARATUS INCLUDING THE SAME - An optical system includes a first negative lens element disposed nearest a front side and a first positive lens element whose front surface resides within a distance 0.4 L from the surface nearest the front side toward a rear side of the optical system having a total lens length L. By appropriately determining the materials for the two lens elements, the optical system realizes a wide angle of view while correcting lateral chromatic aberration well. | 2009-07-02 |
| 20090168193 | Zoom lens and imaging apparatus - A zoom lens configured by arranging a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group in order from the object side to the image side, and further having an aperture diaphragm on the object side of the third lens group. In the first lens group, a first lens, a second lens, and a third lens are located in order from the object side to the image side. In the second lens group, a fourth lens, a fifth lens, and a sixth lens are located in order from the object side to the image side. The third lens group is made up of a seventh lens which is a convex lens, the fourth lens group is made up of at least two or more cemented lenses, the third lens group and the fourth lens group include at least one surface formed into an aspherical surface. | 2009-07-02 |
| 20090168194 | Zoom lens and image pickup apparatus equipped with same - A zoom lens has, in order from the object side thereof, a positive first lens unit G | 2009-07-02 |
| 20090168195 | Zoom lens and image pickup apparatus equipped with same - A zoom lens has, in order from the object side thereof, a positive first lens unit G | 2009-07-02 |
| 20090168196 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a rear lens unit including one or more lens units and having an overall positive refractive power. In the zoom lens, the third lens unit includes a first subunit having a positive refractive power and including one lens component having a positive refractive power, an aperture stop, and a second subunit including a negative lens. In the third lens unit of the zoom lens, a focal length of each of the first subunit and the second subunit is appropriately set. | 2009-07-02 |
| 20090168197 | ZOOM LENS - An exemplary zoom lens comprises, in order from an object side of the zoom lens, a first lens module having a negative refractive power, a second lens module having a positive refractive power and a third lens module having a positive refractive power. When the zoom lens is adjusted from wide-angle to telephoto, the first lens module remain fixed in place, the second group is moved toward the object side thereof along an optical axis so as to perform the zooming, while the third group is moved along the optical axis so as to compensate for any fluctuation of in position of an image on the image plane caused by the movement of the second lens module. | 2009-07-02 |
| 20090168198 | ZOOM LENS ASSEMBLY CONTROLLED BY SHAPE MEMORY MATERIAL - A zoom lens assembly comprises a first optical component, a second optical component, and an actuator. The actuator comprises a shape memory material that changes its shape in response to electrical or thermal fields to change the distance between the first and second optical components. | 2009-07-02 |
| 20090168199 | LENS CONTROL APPARATUS, LENS BARREL, IMAGING APPARATUS, AND OPTICAL APPARATUS - A lens control apparatus includes a temperature detection unit configured to detect a temperature near a zoom lens and a focus lens, a zoom lens drive unit configured to drive the zoom lens, and a controller configured, if it is determined that a current temperature near the zoom lens and the focus lens detected by the temperature detection unit is higher than a reference temperature, to acquire a telephoto end position to be set at the current temperature, to compare the telephoto end position with a current position of the zoom lens, and to cause the zoom lens drive unit to move the zoom lens to the telephoto end position if the current position of the zoom lens is located beyond the telephoto end position on a telephoto side. | 2009-07-02 |
| 20090168200 | LENS POSITION CONTROL APPARATUS, IMAGING APPARATUS, AND CONTROL METHOD - It is provided an imaging apparatus including a plurality of motors configured to be driven to move lenses in synchronous with a drive pulse, a position detection unit configured to detect one of positions of the lenses moved by the driving of the plurality of motors, an operation unit configured to perform an output corresponding to an operation in response to the operation by a user, and a controller configured to receive the output from the position detection unit and control the plurality of motors. The controller supplies the number of drive pulses calculated based on a target position for moving the lens calculated based on the output from the operation unit and a lens position detected by the position detection unit. | 2009-07-02 |
| 20090168201 | Imaging lens module - An imaging lens module includes a fixed diaphragm and an optical module. The optical module includes first, second, third, fourth and fifth lenses arranged from an object side to an image side in a sequence of: the first lens, having a negative refractive power, a convex surface disposed towards the object side, and a concave surface disposed towards the image side; the diaphragm; the second lens having a positive refractive power and a convex lens disposed towards the image side; and the third lens; being a meniscus negative lens; the fourth lens, being a positive lens, and adhered with the third lens to form a composite lens; the fifth lens, having a positive refractive power, such that the imaging lens module is a lens module with the features of high imaging quality and high yield rate. | 2009-07-02 |
| 20090168202 | IMAGING LENS - Disclosed is an imaging lens. The imaging lens includes a first lens having positive (+) power, a second lens having negative (−) power, and a third lens having positive (+) power and an inflection point on an imaging surface thereof facing an image side, wherein the first to third lenses are sequentially arranged from an object, and the second lens has power stronger than power of the first and third lenses. | 2009-07-02 |
| 20090168203 | LENS MODULE - A lens module includes a barrel, a lens, and a light leveling assembly. The barrel includes an opening, which allows a light to pass therethrough. The lens is accommodated in the barrel. The light leveling assembly is accommodated in the barrel. The light leveling assembly includes a substrate and a film. The substrate has a first surface where the film is disposed and an opposite second surface facing the lens. A thickness of the film is approximately equal to a quarter wavelength of the light. A refractive index of the film exceeds that of the substrate. | 2009-07-02 |
| 20090168204 | LENS, LENS UNIT, AND IMAGING DEVICE USING THE SAME - A lens is provided which is configured so that the dimensional accuracy of the lens surface can be evaluated easily and accurately, and the control of the accuracy of the lens can be easily performed. The lens comprises a lens effective part having lens surfaces formed around an optical axis as the center and an edge part in a doughnut shape as viewed in a plan view, which is extended along the outer periphery of the lens effective part. The edge part and the lens effective part are molded simultaneously, and annular indices around the optical axis as the center, with which the dimensional accuracy of the lens surfaces can be detected, are formed on both the surfaces of the edge part. | 2009-07-02 |
| 20090168205 | COMPOSITE OPTICAL DEVICE - A composite optical device | 2009-07-02 |
| 20090168206 | LENS BARREL - A lens barrel has a first lens group, a second lens group, a third lens group, a first support frame for supporting the first lens group, a second support frame for supporting the second lens group, a first driving unit, a shutter unit, and an aperture unit. The first lens group has an overall negative refractive power, and includes a prism. The second support frame is driven along a second optical axis by the first driving unit. The shutter unit has a shutter mechanism, a shutter drive motor configured to drive the shutter mechanism, a neutral density filter, and a filter drive motor configured to drive the neutral density filter. The shutter drive motor and the filter drive motor are disposed flanking the second optical axis when viewed in a direction along the second optical axis. | 2009-07-02 |
| 20090168207 | Replacement Apparatus for an Optical Element - A replacement apparatus for an optical element mounted between two adjacent optical elements in a lithography objective has a holder for the optical element to be replaced, which holder can be moved into the lithography objective through a lateral opening in a housing of the same. | 2009-07-02 |
| 20090168208 | LENS DRIVE APPARATUS - A lens drive apparatus includes: a base member; a holder having a cylindrical shape and movably supported in an optical axis direction relative to the base member; a cam member and moving the holder in the optical axis direction by abutting with the holder; and a biasing member urging the holder such that the holder | 2009-07-02 |
| 20090168209 | Focusing device and focusing method - A focusing device is provided. The focusing device has a changing focal length along a physical parameter thereof. The focusing device could be annular or in a shape of a disk. The annular focusing device has a width thereof changing with a periphery thereof, and the disk-shaped focusing device has a thickness, wherein the thickness of the disk-shaped focusing device is changing with an angular position thereof. | 2009-07-02 |
| 20090168210 | LENS HOLDER - An exemplary lens holder ( | 2009-07-02 |
| 20090168211 | Auxiliary mirror assembly for sideview mirror of car - An auxiliary mirror assembly for a sideview mirror of a car includes an auxiliary mirror including a mirror body and a connecting base, a first support bar and a second support bar each mounted on the connecting base, a first holding base and a second holding base each mounted on the first support bar and each provided with at least one holding flange, a locking hook and a binding strap. Thus, the first support bar and the second support bar are combined with the sideview mirror to attach the auxiliary mirror to the sideview mirror to extend the side-viewing distance of the sideview mirror so that when a trailer is attached to the car, the driver in the car can see clearly the trailer behind the car by the auxiliary mirror. | 2009-07-02 |
| 20090168212 | Dynamic test glide head calibration using laser adjustment - Methods and apparatus for the calibration and use of test glide head gimbal assemblies are disclosed. Calibration is performed by pulse laser adjustment of the flexure mounted to the glide head, while the head is flying above a media test disk having asperities of known dimensions. The calibration process normalizes the fly heights of glide heads used to measure defects on both upper and lower surfaces of disk drive media, allowing upper and lower surfaces to be scanned simultaneously. | 2009-07-02 |
| 20090168213 | VERIFICATION OF A GROUND CONNECTION FABRICATION PROCESS FOR ESD RESISTORS IN MAGNETIC HEADS - Test methods and components are disclosed for testing the quality of the ground connection fabrication process for ESD shunt resistors in magnetic heads. A wafer is populated with one or more test components along with magnetic heads. The test components are fabricated with ESD shunt resistor ground connections created by the same or similar process used to fabricate the ESD shunt resistor ground connections in magnetic heads on the wafer. The resistance of the test component ground connections may then be measured in order to determine the quality of the ground connections formed by the fabrication process. The quality of the ground connection fabrication process may then be determined based on the measured resistance of the test components. | 2009-07-02 |
| 20090168214 | VERIFICATION OF A FABRICATION PROCESS USED TO FORM READ ELEMENTS IN MAGNETIC HEADS - Test methods and components are disclosed for testing the quality of a fabrication process used to form read elements in magnetic heads. A wafer is populated with one or more test components along with magnetic heads. The test components are formed by the same or similar fabrication processes as the read elements, but do not include a conductive MR sensor between the test leads. By measuring the resistance of the test components, the formation of parasitic shunts can be identified in the test components, which may indicate the formation of parasitic shunts in the read elements. Thus, the quality of the fabrication process in forming read elements in magnetic head may be determined. | 2009-07-02 |
| 20090168215 | TEST COMPONENTS FABRICATED WITH LARGE AREA SENSORS USED FOR DETERMINING THE RESISTANCE OF AN MR SENSOR - Test methods and components are disclosed for testing resistances of magnetoresistance (MR) sensors in read elements. Test components are fabricated on a wafer with a first test lead, a test MR sensor, and a second test lead. The test leads and test MR sensor are fabricated with similar processes as first shields, MR sensors, and second shields of read elements on tie wafer. However, the test MR sensor is fabricated with an area that is larger than areas of the MR sensors in the read elements. The larger area of the test MR sensor causes the resistance of the test MR sensor to be insignificant compared to the lead resistance. Thus, a resistance measurement of the test component represents the lead resistance of a read element. An accurate resistance measurement of an MR sensor in a read element may then be determined by subtracting the lead resistance. | 2009-07-02 |
| 20090168216 | TEST COMPONENTS FABRICATED WITH PSEUDO SENSORS USED FOR DETERMINING THE RESISTANCE OF AN MR SENSOR - Test methods and components are disclosed for testing resistances of magnetoresistance (MR) sensors in read elements. Test components are fabricated on a wafer with a first test lead, a pseudo sensor, and a second test lead. The test leads and MR sensor are fabricated with similar processes as first shields, MR sensors, and second shields of read elements on the wafer. However, the pseudo sensor in the test component is fabricated with lead material (or another material having similar resistance properties) instead of an MR thin-film structure like an MR sensor. Forming the pseudo sensor from lead material causes the resistance of the pseudo sensor to be insignificant compared to the lead resistance. Thus, a resistance measurement of the test component represents the lead resistance of a read element. An accurate resistance measurement of an MR sensor in a read element may then be determined by subtracting the lead resistance. | 2009-07-02 |
| 20090168217 | Test-device system for independent characterization of sensor-width and sensor-stripe-height definition processses - A test-device system and method for deconvoluting measurements of effects of a sensor-width definition process from measurements of effects of a sensor-stripe-height-definition process in a manufacture of a magnetic sensor. The test-device system comprises a first test device for generating data to characterize a sensor-width-definition process. The test-device system also comprises a second test device for generating data to characterize a sensor-stripe-height-definition process. The test-device system allows independent characterization of a sensor-width parameter and a sensor-stripe-height parameter. | 2009-07-02 |
| 20090168218 | DISK DRIVE DEVICE AND SERVO WRITE METHOD - According to one embodiment, a servo write module is configured to write radial servo patterns on the disk media using a first spiral servo pattern of the spiral servo patterns as a base pattern for tracing, to detect a shift amount of a sync mark position in each of other spiral servo patterns with respect to a sync mark position in the first spiral servo pattern, and to adjust, when the base pattern is switched from the first spiral servo pattern to a second spiral servo pattern of the spiral servo patterns, a phase of the servo write clock based on the detected shift amount corresponding to the second spiral servo pattern. | 2009-07-02 |
| 20090168219 | METHODS AND APPARATUS FOR WRITING SERVO FRAMES TO AND/OR VERIFYING DATA AREAS OF A STORAGE MEDIUM - Methods and apparatus are disclosed for writing and verifying servo frames written on a storage medium, for verifying data areas of a storage medium, and for writing and verifying servo frames and data areas of a storage medium. In one example, the writing of at least a portion of a position field of a servo frame to a track of the storage medium is interleaved with reading of at least a portion of a previously written logic field of a servo frame of a track of the storage medium whereby said portion of the previously written logic field can be verified during the servo writing process. | 2009-07-02 |
| 20090168220 | THERMALLY ASSISTED MAGNETIC HEAD AND MANUFACTURING METHOD OF SAME - When first and second near-field light-generating portions are irradiated with laser light or other energy rays, near-field light is generated at the tips of both the near-field light-generating portions. By means of the near-field light thus generated, a magnetic recording medium opposing the medium-opposing surface is heated, and the coercivity of the magnetic recording medium is lowered. Since at least a portion of the main magnetic pole is positioned within the spot region including the region between the first and second near-field light-generating portions, the tips of both the near-field light-generating portions and the main magnetic pole can be brought extremely close together, and high-density recording can be performed. | 2009-07-02 |
| 20090168221 | METHOD AND SYSTEM FOR DETECTING A CHANGE IN A ROTATIONAL VELOCITY OF A MAGNETIC DISK OR A SPINDLE COUPLED TO THE MAGNETIC DISK - A method according to one embodiment comprises detecting a change in a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk, the change being caused by head-disk contact. A method for detecting head-disk contact according to another embodiment comprises measuring a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk; detecting a change in the rotational velocity, the change being caused by head-disk contact; and correlating the change in rotational velocity with the head-disk contact. | 2009-07-02 |
| 20090168222 | Correcting a track pitch error with a subsequent servo-write pass - A method for correcting a track pitch error in servo tracks written on a magnetic recording media coupled with a disk surface, by using a subsequent servo-write pass, comprises propagating servo tracks across the magnetic recording media in a previous servo-write pass. The servo tracks have radial positioning servo code. The servo tracks enable a magnetic transducer to be positioned to at least one radial position on the magnetic recording media. At least one corrected radial reference point is calculated for the track pitch error written on the magnetic recording media, by identifying at least one inconsistency between a mechanical response of an actuator and the track pitch. A corrected location for at least one servo track is identified. At least one new servo track at the corrected location is propagated with the subsequent servo-write pass. Optimum data track distribution across the disk surface and optimum reading and writing of data to and from the magnetic recording media is enabled. | 2009-07-02 |
| 20090168223 | Servo track writer clockhead radius jig - A servo track writer (STW) clockhead radius jig is disclosed. One embodiment provides a hard disk drive assembly including a base having a cutaway portion to provide visual access therein. In addition, a disk is mounted in the hard disk drive assembly, this disk having an indicator thereon to indicate a required radius setting for a clockhead. | 2009-07-02 |
| 20090168224 | METHOD AND APPARATUS FOR OFFSET CONTROL IN A DISK DRIVE - According to one embodiment, there is provided a disk drive that can perform dynamic offset control (DOC). The disk drive has a magnetic head, a disk, and offset calculating modules. The magnetic head has read head. Offset-measuring position data is written in a non-servo area provided in the disk. The read head reads the offset-measuring position data from the disk. Based on the offset-measuring position data thus read, the offset calculating modules calculate an offset value that changes during a one-rotation period of the disk. | 2009-07-02 |
| 20090168225 | DISK DRIVE DEVICE AND HEAD POSITIONING CONTROL METHOD - According to one embodiment, a disk drive includes a detection signal producing module configured to produce a detection signal by reading each of the spiral servo patterns, the spiral servo patterns being read by a head while the head scans a circumferential direction region on the disk media. A position error computation module is configured to produce servo burst signals A, B, C, and D using a plurality of frames obtained by dividing the detection signal at even time intervals, at least one burst signal of the servo burst signals being produced using at least two frames in the frames, and to compute a position error of the head based on amplitude values of the produced burst signals. | 2009-07-02 |
| 20090168226 | Repair of defective servo tracks - A method for repairing at least one defective servo segment of a servo sector having at least one defective servo track written on a magnetic recording media. The method comprises mapping the magnetic recording media for locations of the defective servo segment of the servo sector. A non-defective segment of the servo sector is replicated at least once on the magnetic recording media in a customer data zone, thereby creating at least one good servo segment copy of the servo sector. The good servo segment copy is propagated through the customer data zone associated with the defective servo segment. The good servo segment copy is copied onto the magnetic recording media previously occupied by the defective servo segment of the servo sector. | 2009-07-02 |
| 20090168227 | Distributed track identifier on a hard disk drive - A magnetic disk for a hard disk drive comprising a distributed track identifier is described. The disk includes a first portion of a track identifier physically located at a first location on a disk sector and a second portion of the track identifier physically located at a second location on the disk sector wherein the first portion and the second portion of the track identifier are discontinuous on the sector. | 2009-07-02 |
| 20090168228 | DISK DRIVE HAVING A DISK OF DISCRETE-TRACK MEDIA TYPE - According to one embodiment, a disk drive has a DTM type disk. The DTM type disk has a servo area on one recording surface. In the servo area, a servo pattern is recorded. The servo pattern is composed of a projection-depression pattern and an N- and P-pole magnetic pattern. The N- and P-pole magnetic pattern is recorded in an address-data region that contains a cylinder code. | 2009-07-02 |
| 20090168229 | SERVO PATTERNS FOR SELF-ASSEMBLED ISLAND ARRAYS - Servo patterns and associated methods of fabricating servo patterns are described. For patterned storage media, data sectors and servo sectors may be patterned using self-assembly. In one embodiment, self-assembly is used to form a first array of islands and a second array of islands in servo sectors that are track-wise offset. A servo writing process is then performed to write a desired servo pattern in the arrays, such as for burst fields, synchronization fields, etc. | 2009-07-02 |
| 20090168230 | Mixed format disk drive - A magnetic disk for a hard disk drive comprising a plurality of physical sector sizes is disclosed. The magnetic disk includes a first sector size area physically formatted according to a first physical sector size and a second sector size area physically formatted according to a second physical sector size different from the first sector size by a multiple of the first sector size wherein the second sector size can be presented externally as multiple sectors of said first sector size. | 2009-07-02 |
| 20090168231 | METHOD AND APPARATUS FOR REPRODUCING SERVO DATA FROM A DISCRETE TRACK MEDIA IN A DISK DRIVE - According to one embodiment, disclosed herein is a disk drive that has a disk of discrete-track media (DTM) type. The DTM disk has servo regions. Each servo region has dividing grooves and non-servo data parts. Each dividing grooves extends along the centerline of any projecting region having a width larger than a prescribed value. Each non-servo data part suppresses reproduction noise. The disk drive has a read/write channel that includes a reproduced-signal processing unit. This unit reproduces servo data from each servo region. | 2009-07-02 |
| 20090168232 | Microactuator reference input limit to prevent internal states over-accumulation - A microactuator reference limit used to prevent over-accumulation of internal states may be set based on the microactuator's mechanical properties and is applied at the reference point to the microactuator servo subsystem. A microactuator variable input limit to prevent over-accumulation of internal states may be dynamically determined based on the difference between a signal corresponding to the maximum physical stroke of the microactuator and an estimated motion of the microactuator. Either configuration of servo system automatically ensures that all the internal states of the microactuator controller will not over-react and cause excessive overshoot, sluggish response, and/or saturation. | 2009-07-02 |
| 20090168233 | Manufacturing method of hermetic connection terminal used in a disk drive device having hermetically sealed enclosure and disk drive device - To efficiently manufacture a feedthrough used in a disk drive device having a hermetically sealed enclosure, embodiments of the present invention manufacture a feedthrough used in an HDD having a hermetically sealed enclosure. An embodiment of a manufacturing method of the present embodiment manufactures a columnar body, cuts the columnar body in the direction vertical to the axes of pins, and cuts out a feedthrough. Then, necessary plating is made on the outer surfaces of the cut out feedthrough. The columnar body comprises a hollow tube, a plurality of pins inserted inside the tube, and an insulating sealant filled inside the tube. This manufacturing method achieves efficient manufacture of the feedthrough. | 2009-07-02 |
| 20090168234 | DISK DRIVE APPARATUS - According to one embodiment, a disk apparatus has a disk, a head, a carriage assembly, and a circulation filter provided at the corner of the base, located downstream of the head with respect to a rotating direction of the disk. A sidewall of the base has a confronting surface which continuously extends along the outer peripheral edge of the disk, is formed in an arc, and confronts with the outer peripheral edge of the disk with a gap. The base has a guide flow path | 2009-07-02 |
| 20090168235 | ENHANCED CPP READ SENSORS WITH LATERAL SPIN TRANSPORT - CPP read sensors and associated methods of fabrication are described that provide lateral spreading of a sense current along the length of an AFM layer of the read sensor. Winged regions (i.e., extended portions) are added to the layers of a CPP sensor stack to induce lateral spreading of the sense current in the AFM layer. Particularly, the pinned layer and the AFM layer have widths greater than the other layers of the sensor stack. Further, the pinned layer comprises multiple layers of materials, with a first layer of material closer to the AFM layer having a lower conductivity and/or a lower spin dependent scattering asymmetry than the second layer of material. | 2009-07-02 |
| 20090168236 | Magnetic head for perpendicular recording having stepped wrap around shield with independent control of write pole track width and flare point dimensions - Methods and structures for the fabrication of a thin film, perpendicular recording write head are disclosed. The fabrication involves the deposition of two different oxide layers which have mutually high etch selectivities. This characteristic allows a write pole structure to be built wherein the track width is independent of the location of the flare point. The process also produces a structure wherein the throat height of the shield is self aligned to the location of the flare point of the write pole. | 2009-07-02 |
| 20090168237 | Perpendicular magnetic recording writer main pole having imbedded non-magnetic core and de-coupled pole tip - Methods and structures for the fabrication of a thin film, perpendicular recording write head are disclosed. The structure provides a pole tip separated from a rear pole by a non-magnetic separation layer located adjacent the flare point. The rear pole contains an imbedded non-magnetic layer. The separated pole tip and imbedded layer aid in the high data rate recording as well as the erasure performance of the write pole structure. The fabrication involves the deposition of two different oxide layers which have mutually high etch selectivities. This characteristic allows a write pole structure to be built wherein the track width is independent of the location of the flare point. The process also produces a structure wherein the placement of the throat height of the shield is self aligned to the flare point of the write pole. | 2009-07-02 |
| 20090168238 | INFORMATION STORAGE MEDIUM USING FERROELECTRIC, METHOD OF MANUFACTURING THE SAME, AND INFORMATION STORAGE APPARATUS INCLUDING THE SAME - Provided is an information storage medium using a ferroelectric, including a substrate having an amorphous crystal structure, an electrode layer formed on the substrate, and a ferroelectric layer in a (001) direction formed on the electrode layer. | 2009-07-02 |
| 20090168239 | Adjustable voice coil motor driver - A method of configuring a signal for controlling a voice coil motor (VCM) is disclosed. A voltage at an error amplifier of a VCM driver is accessed. A target value at the error amplifier is accessed. A difference value between the target value and the voltage is determined. An impedance value of the variable compensation coupled with the error amplifier is adjusted, based on the difference value. | 2009-07-02 |
| 20090168240 | PERPENDICULAR WRITE HEAD HAVING A MODIFIED WRAP-AROUND SHIELD TO IMPROVE OVERWRITE, ADJACENT TRACK INTERFERENCE AND MAGNETIC CORE WIDTH DEPENDENCE ON SKEW ANGLE - A magnetic write head for perpendicular magnetic data recording. The write head includes an wrap around trailing shield structure for improved write field strength, reduced skew related adjacent track interference and magnetic core width. The trailing wrap around shield includes a side shield that is separated from sides of the write pole by a side gap that is narrower near the leading edge of the write pole and wider near the trailing edge of the write pole. | 2009-07-02 |
| 20090168241 | Magnetic disk drive - Embodiments of the present invention help to inhibit record information in a perpendicular magnetic recording disk drive from being attenuated or erased due to leakage of a recording magnetic field into the already-recorded information. According to one embodiment, a magnetic disk includes a soft magnetic underlayer and a magnetic recording layer. A magnetic head includes a main magnetic pole, an auxiliary magnetic pole, a trailing shield which is disposed via a non-magnetic film on a trailing side of the main magnetic pole and in which a reverse side is in contact with the auxiliary magnetic pole, and side shields disposed on both sides of the main magnetic pole. Herein, where a saturation magnetic flux density of the soft magnetic underlayer is Bs | 2009-07-02 |
| 20090168242 | METHOD FOR MANUFACTURING A PERPENDICULAR MAGNETIC WRITE POLE HAVING A LARGE BEVEL ANGLE - A method for manufacturing a magnetic write head for perpendicular magnetic recording, the write head having a write pole with an increased bevel (taper) angle. The write pole is constructed by forming a mask structure over a magnetic write pole material, and then performing a combination of sweeping or rotation with static (non-rotating, non-sweeping) ion milling at an angle relative to normal. The ion milling is performed while moving the wafer laterally within the ion milling tool to ensure that the ion milling is performed uniformly across the wafer during static milling. | 2009-07-02 |
| 20090168243 | HARD DISK CASE - A hard disk case for installation in a computer case includes a support frame for installation of a hard disk drive, a base mounted to the support frame, and a handle. The handle has a pivoting end pivotally connected with the base, a first protrusion insertable in an insertion portion of the computer case and pushable against a periphery wall of the insertion portion for enabling engagement of the hard disk drive with the computer case, and a second protrusion spaced from the first protrusion and pushable against a stopping portion of the computer case for enabling disengagement of the hard disk drive from the computer case. As a result, the hard disk case of the present invention is convenient in assembly and disassembly works. | 2009-07-02 |
| 20090168244 | Magnetic recording medium, magnetic recording and reproducing apparatus, and method for manufacturing magnetic recording medium - The magnetic recording medium includes: a substrate; a recording layer formed in a predetermined concavo-convex pattern over the substrate, the concavo-convex pattern including a convex portion that serves as a recording element; and a filling portion that fills a concave portion between the recording elements. The filling portion comprises a metal-based main filling material and nitrogen. Nitrogen is unevenly distributed in the filling portion such that the ratio of the number of nitrogen atoms to the total number of atoms of the main filling material and nitrogen atoms is greater in the upper surface portion of the filling portion than in the lower portion thereof. | 2009-07-02 |
| 20090168245 | INFORMATION RECORDING MEDIUM, RECORDING/REPRODUCING APPARATUS, AND STAMPER - Data track patterns and servo patterns are formed on an information recording medium by concave/convex patterns divided into ring-shaped regions that are concentric with the data track patterns. In the servo patterns, a unit convex length and a unit concave length along the direction of rotation increase in each ring-shaped region from an inside to an outside of the ring-shaped region in proportion to the distance from the center of the data track patterns and a value produced by dividing an average unit convex (or concave) length inside each ring-shaped region by a distance from the center to the ring-shaped region decreases toward the outer periphery of the medium. The ring-shaped regions include plural first regions between an innermost region and an outermost region. Respective lengths along a radial direction of the first regions increase toward an outer periphery of the medium. | 2009-07-02 |
| 20090168246 | HYDRODYNAMIC BEARING DEVICE, SPINDLE MOTOR, AND RECORDING AND REPRODUCING APPARATUS - An annular groove is provided to the rotary portion and/or the fixed portion in a bearing seal portion, and its cross section has a shape approximated by an arc. The annular groove is such that the relationship between the groove width W in a direction following the surface constituting a bearing seal portion and the groove depth Dg in a direction perpendicular to the surface constituting the bearing seal portion is Dg/W<0.4. | 2009-07-02 |
| 20090168247 | MAGNETIC HEAD WITH EMBEDDED SOLDER CONNECTION AND METHOD FOR MANUFACTURE THEREOF - A slider for magnetic data recording, the slider including a plurality of solder pads that are embedded into the head. The solder pads can be formed during the formation of read and/or write heads, and can each be contained within a cavity. These cavities can be photolithographically patterned so that they can be formed very close together. In addition, because the solder pads are contained within the cavities, they do not flow into one another as would standard solder balls so that the embedded solder balls can be spaced much more closely together than standard solder balls can, without the risk of shorting between solder pads. | 2009-07-02 |
| 20090168248 | Head slider and disk drive device - Embodiments of the present invention help to adjust the recess depth of a head element portion of a head slider. In an embodiment of the present invention, in a test step in manufacturing an HDD, the HDD examines the recess depth of a head element portion and decreases and adjusts the recess depth if the recess depth of the head element portion does not satisfy the predetermined condition. The HDD moves an actuator to a ramp of a retract position and supplies power to a heater in a head slider. If the heater power is large, the head element portion undergoes plastic deformation. The plastic deformation of the head element portion decreases the recess depth of the head element portion. | 2009-07-02 |
| 20090168249 | FLEXURE BASED SHOCK AND VIBRATION SENSOR FOR HEAD SUSPENSIONS IN HARD DISK DRIVES - Systems and methods for flexure based shock and vibration sensor for head suspensions in hard disk drives. Specifically, this invention deals with operational shock and vibration management within a hard disk drive. In one implementation, the assembly includes a circuit embedded optical waveguide sensor that includes a flexible electrical circuit board with a configuration of either a single or multi layers of conductor traces, a thin flexure gimbal for carrying and flying a HDD slider, a consecutive sensing layer constructed by an optical core and by clad construction with a configuration of either a single core array or a plural core array, an optical loop formed by light input and an output core, optical grating disposed on the consecutive sensing layer forming an optical grating waveguide sensor, a light emitter for injecting light into the optical core, and a receiver receiving the output light from the optical core. | 2009-07-02 |
| 20090168250 | DISK DRIVE APPARATUS - According to one embodiment, a disk drive apparatus includes a base, a recording medium, a drive motor, a head, a carriage, and a latch mechanism. The latch mechanism includes a latch member, which is supported on the base to be movable between a latch position and a release position, and a latch stop provided on the base and configured to regulate the movement of the latch member in a direction of the latch position. The latch member has a first abutment portion which abuts the carriage and moves the latch member from the release position to the latch position according to the movement of the carriage, when the carriage moves from the information processing position to the retracted position, a latch hook capable of latching the carriage at the latch position, and a second abutment portion which confronts to the latch hook with a gap at the latch position. | 2009-07-02 |
| 20090168251 | DISK DRIVE APPARATUS - According to one embodiment of the invention, a disk drive apparatus includes a case, a disk-shaped recording medium, a drive motor, a head, a head actuator, and a latch mechanism configured to latch the head actuator and hold the head actuator at a retracted position when the head actuator receives an external force. A latch member of the latch mechanism is arranged to be movable between a latch position and a release position and has an abutment portion, which abuts the head actuator when the head actuator moves from the information processing position to the retracted position, and a latch claw which latches the head actuator. The abutment portion has a first abutment portion, which abuts the head actuator first, and a second abutment portion, which abuts the head actuator following the first abutment portion, and the first abutment portion being formed less rigid than the second abutment portion. | 2009-07-02 |
| 20090168252 | HEAD STACK ASSEMBLY AND DISK DRIVE APPARATUS PROVIDED WITH THE SAME - According to one embodiment, a head stack assembly includes a bearing portion configured to be mounted with a maximum number of arms and a plurality of spacers, a smaller number of arms than the maximum number attached to the bearing portion and extending in the same direction from the bearing portion, a spacer attached to the bearing portion and stacked in layers between the adjacent arms, suspensions and heads attached to the arms, individually, a support frame which supports a coil, and a dummy spacer attached to the bearing portion so as to overlap the arms. The dummy spacer integrally includes a spacer body formed with a thickness equal to the sum of those of the smaller number of arms than the maximum and the spacer arranged between the smaller number of arms, and a balancing portion extending along the extension of the arms from the spacer body. | 2009-07-02 |
| 20090168253 | METHOD OF MAKING A MAGNETORESISTIVE READER STRUCTURE - A method of making a magnetoresistive sensor includes defining a track width of a magnetoresistive element stack of the sensor. Further, processes of the method enable depositing of hard magnetic bias material on each side of the stack. These processes may permit both milling of excess depositions of the material outside of regions where the hard magnetic bias material is desired via use of a photoresist and making the material have a planar surface via chemical mechanical polishing, which also removes the material on top of the stack. | 2009-07-02 |
| 20090168254 | Test device and method for measurement of tunneling magnetoresistance properties of a manufacturable wafer by the current-in-plane-tunneling technique - A combined manufacturable wafer and test device for measuring a tunneling-magnetoresistance property of a tunneling-magnetoresistance, sensor-layer structure. The combined manufacturable wafer and test device comprises a tunneling-magnetoresistance, sensor-layer structure disposed on a substrate. The combined manufacturable wafer and test device also comprises a plurality of partially fabricated tunneling-magnetoresistance sensors; at least one of the partially fabricated tunneling-magnetoresistance sensors is disposed at one of a plurality of first locations. The test device is disposed on the substrate at a second location different from the plurality of first locations. The test device allows measurement of the tunneling-magnetoresistance property of the tunneling-magnetoresistance, sensor-layer structure using a current-in-plane-tunneling technique. | 2009-07-02 |
| 20090168255 | METHOD OF REPAIRING THE DETERIORATION OF MAGNETO-RESISTIVE EFFECT DEVICE - The invention provides a method for fixing up the deterioration of a magneto-resistive effect device. A hard disk system is provided in it with a head heating means for heating a thin-film magnetic head, and by that head heating means, a defective site of the magneto-resistive effect device, which occurs as the hard disk system is in operation and is confined in a quasi-stable state, is fixed up in such a way as to return back to its own normal stable state. Thus, the deteriorated site of the magneto-resistive effect device (reproducing device) in the thin-film magnetic head, which is caused by the so-called thermal asperity as the hard disk system is in operation, is fixed up while it remains built in the hard disk system, i.e., without dismantling the hard disk system. | 2009-07-02 |
| 20090168256 | MAGNETORESISTANCE (MR) READ ELEMENTS HAVING AN ACTIVE SHIELD - Read elements and associated methods of fabrication are disclosed. A read element as described herein includes a magnetoresistance (MR) sensor sandwiched between first and second shields. The read element uses the first shield as an active portion of the MR sensor. Instead of implementing an AFM pinning layer in the MR sensor, the first shield takes the place of the AFM pinning layer. The first shield is orthogonally coupled to the pinned layer through an orthogonal coupling layer, such as a thin layer of AFM material. Through this structure, the magnetic moment of the first shield pins the magnetic moment of the pinned layer transverse to the ABS of the read element, and an AFM pinning layer is not needed. | 2009-07-02 |
| 20090168257 | INDEPENDENT SIDE SHIELD AND TOP SHIELD THROAT HEIGHT CONTROL FOR HIGH LINEAR DENSITY WRAP AROUND SHIELD WRITE HEAD - A magnetic write head for perpendicular magnetic recording. The magnetic write head includes a write pole having a pole tip region and a flared region. The write pole also has a trailing, wrap-around magnetic shield that is separated from the sides of the write pole by a non-magnetic side gap layer. The write head is formed such that the side gap spacing is larger in the flared region than in the pole tip region. This varying gap spacing can be formed by depositing a non-magnetic material using a collimated sputter deposition aligned substantially perpendicular to the air bearing surface. This collimated sputtering deposits the non-magnetic material more readily on the sides of the write pole in the flared region than in the pole tip region. | 2009-07-02 |
| 20090168258 | HYBRID, SELF ALIGNED MAGNETIC WRITE HEAD WITH A PARTIALLY PLATED POLE AND METHOD OF PRODUCING SAME - A magnetic write head for perpendicular magnetic recording. The write head has a secondary flare point defined by magnetic structures that extend from the sides of the write pole, but not over the trailing edge of the write pole. The magnetic structures each have a front edge that defines the secondary flare point. By constructing the magnetic structures so that they only extend from the sides of the write pole and not over the write pole, they can be formed by electroplating, while leafing the mask structure (used to define the write pole) still intact, thereby greatly simplifying manufacture and preventing damage to the write pole during manufacture. | 2009-07-02 |
| 20090168259 | WAFER LEVEL BALANCED CAPACITANCE DESIGN FOR MAGNETIC HEADS - Embodiments of the invention provide methods, systems and apparatus for testing electronic components, and more specifically for testing magnetoresistive heads. A pair of top shield pads and a pair of bottom shield pads may be formed in a kerf region of a wafer on which magnetoresistive heads are formed. The top shield pads, bottom shield pads, and a magnetoresistive head may form a circuit that may be coupled with a testing circuit to exchange test signals configured to test the magnetic head. The pair of bottom shield pads may provide balanced impedance to substrate that nullifies the effects of broadband noise. | 2009-07-02 |
| 20090168260 | Layered return poles for magnetic write heads - Methods and structures for the fabrication of both thin film longitudinal and perpendicular write heads are disclosed. A unique feature of these write heads is the inclusion of layered return poles, which comprise alternating layers of 22/78 and 80/20 NiFe alloys. The alternating layers also vary in thickness, the 22/78 NiFe layers having a nominal thickness of 1500 angstroms and the 80/20 NiFe layers having a nominal thickness of about 75 angstroms. Head efficiency and signal to noise ratios are significantly improved in heads having layered return pole construction. | 2009-07-02 |
| 20090168261 | HEAD SLIDER AND MAGNETIC STORAGE DEVICE - A magnetoresistive element is located between a lower shielding layer and an upper shielding layer. The magnetoresistive element receives an electric current through the lower shielding layer and the upper shielding layer. A non-magnetic conductive layer is embedded in the insulating film between the slider body and the lower shielding layer. An air layer is formed between the head slider and a storage medium. Capacitive coupling is established between the head slider and the storage medium. The capacitive coupling allows transmission of the noise from the storage medium to the slider body. The noise affects capacitance established between the lower shielding layer and the slider body. The non-magnetic conductive layer serves to prevent variation in a potential difference resulting from transmission of the noise between the lower shielding layer and the upper shielding layer. | 2009-07-02 |
| 20090168262 | Magnetic head design having reduced susceptibility to electrostatic discharge from media surfaces - Methods and structures for the fabrication of a thin film, longitudinal and perpendicular recording heads are disclosed. The heads comprise a plurality of embedded static dissipative layers that extend a few nanometers from the air bearing surface. These extended layers are first to contact the magnetic media surface and drain any electric charge buildup before a damaging discharge occurs with read or write head components. The embedded static dissipative layers are particularly useful for use in heads utilizing thermal fly height control systems, which tend to increase the probability of damaging electrical discharge through critical head components. | 2009-07-02 |
| 20090168263 | READ TRANSDUCER AND MAGNETIC STORAGE SYSTEM IMPLEMENTING SAME - A transducer according to one embodiment comprises a first ferromagnetic layer; a second ferromagnetic layer; and an electrically conductive layer positioned between the ferromagnetic layers; wherein a length of the first ferromagnetic layer in a first direction parallel to a plane of deposition thereof is greater than a length of the electrically conductive layer in the first direction such that a first end of the first ferromagnetic layer extends beyond an end of the electrically conductive layer in the first direction, wherein an electrical current enters or exits the end of the first ferromagnetic layer that extends beyond the end of the electrically conductive layer in the first direction. Additional transducer structures, and systems implementing such transducers, are also disclosed. | 2009-07-02 |
| 20090168264 | Magnetoresistive element and magnetic head - In an MR element, first and second ferromagnetic layers are antiferromagnetically coupled to each other through a spacer layer, and have magnetizations that are in opposite directions when no external magnetic field is applied thereto and that change directions in response to an external magnetic field. The spacer layer and the second ferromagnetic layer are stacked in this order on the first ferromagnetic layer. The first ferromagnetic layer includes a plurality of ferromagnetic material layers stacked, and an insertion layer made of a nonmagnetic material and inserted between respective two of the ferromagnetic material layers that are adjacent to each other along the direction in which the layers are stacked. The ferromagnetic material layers and the spacer layer each include a component whose crystal structure is a face-centered cubic structure. The spacer layer and the insertion layer are each composed of an element having an atomic radius greater than that of at least one element constituting the ferromagnetic material layers. | 2009-07-02 |
| 20090168265 | MAGNETIC RECORDING MEDIUM, MAGNETIC SIGNAL REPRODUCTION SYSTEM AND MAGNETIC SIGNAL REPRODUCTION METHOD - The present invention relates to a magnetic recording medium comprising a magnetic layer comprising a hexagonal ferrite powder and a binder on one surface of a nonmagnetic support and a backcoat layer on the other surface of the nonmagnetic support. A power spectrum density at a pitch of 10 micrometers ranges from 800 to 10,000 nm | 2009-07-02 |
| 20090168266 | Magneto-resistive effect element, magnetic head, and magnetic recording/reading apparatus - Embodiments of the present invention provide a practical magneto-resistive effect element for CPP-GMR, which exhibits appropriate resistance-area-product and high magnetoresistance change ratio, and meets the demand for a narrow read gap. Certain embodiments of a magneto-resistive effect element in accordance with the present invention include a pinned ferromagnetic layer containing a first ferromagnetic film having a magnetization direction fixed in one direction, a free ferromagnetic layer containing a second ferromagnetic film having a magnetization direction varying in response to an external magnetic field, an intermediate layer provided between the pinned ferromagnetic layer and the free ferromagnetic layer, and a current confinement layer for confining a current. At least one of the pinned ferromagnetic layer or the free ferromagnetic layer includes a highly spin polarized layer. | 2009-07-02 |
| 20090168267 | CURRENT-PERPENDICULAR-TO-PLANE (CPP) READ SENSOR WITH MULTIPLE REFERENCE LAYERS - A current-to-perpendicular-to-plane (CPP) read sensor with multiple reference layers and associated fabrication methods are disclosed. According to one embodiment of the invention, the multiple reference layers of a CPP tunneling magnetoresistance (TMR) read sensor includes a first reference layer formed by a ferromagnetic polycrystalline Co—Fe film, a second reference layer formed by a ferromagnetic substitute-type amorphous Co—Fe—X film where X is Hf, Zr or Y, and a third reference layer formed by a ferromagnetic interstitial-type amorphous Co—Fe—B film. The first reference layer facilitates the CPP TMR read sensor to exhibit high exchange and antiparallel-coupling fields. The second reference layer provides a thermally stable flat surface, thus facilitating the CPP TMR read sensor to exhibit a low ferromagnetic-coupling field. The multiple reference layers may induce spin-dependent scattering, thus facilitating the CPP TMR sensor to exhibit a high TMR coefficient. | 2009-07-02 |
| 20090168268 | Dedicated noncorrosive smear detector - A disk drive head slider for a magnetic disk drive is provided. The head slider includes a tunnel magnetic resistance device for reading data on a magnetic disk and a dedicated noncorrosive smear detector for measuring resistance wherein the resistance corresponds to a level of smear associated with the head slider. | 2009-07-02 |
| 20090168269 | CURRENT PERPENDICULAR TO PLANE SPIN VALVE WITH HIGH-POLARIZATION MATERIAL IN AP1 LAYER FOR REDUCED SPIN TORQUE - A current perpendicular to plane magnetoresistive sensor having improved resistance amplitude change and reduced spin torque noise. The sensor has an antiparallel coupled pinned layer structure with at least one of the layers of the pinned layer structure includes a high spin polarization material such as Co | 2009-07-02 |
| 20090168270 | EXCHANGE-COUPLED ELEMENT AND MAGNETORESISTANCE EFFECT ELEMENT - In comparison with conventional exchange-coupled elements, the exchange-coupled element of the present invention has greater unidirectional magnetization anisotropy. The exchange-coupled element comprises: an ordered antiferromagnetic layer; and a pinned magnetic layer being exchange-coupled with the ordered antiferromagnetic layer, the pinned magnetic layer having unidirectional magnetization anisotropy. The pinned magnetic layer is constituted by a first pinned magnetic layer having a composition, which can have a face-centered cubic lattice structure, and a second pinned magnetic layer having a composition, which can have a body-centered cubic lattice structure. | 2009-07-02 |
| 20090168271 | DUAL-LAYER FREE LAYER IN A TUNNELING MAGNETORESISTANCE (TMR) ELEMENT HAVING DIFFERENT MAGNETIC THICKNESSES - Tunneling magnetoresistive (TMR) elements and associated methods of fabrication are disclosed. In one embodiment, the TMR element includes a ferromagnetic pinned layer structure, a tunnel barrier layer, and a free layer structure comprised of dual-layers. The free layer structure includes a first free layer and a second amorphous free layer. The magnetic thicknesses of the first free layer and the second amorphous free layer of the dual layer structure differ to provide improved TMR performance. In one example, the first free layer may have a magnetic thickness that is less than 40% of the total magnetic thickness of the free layer structure. | 2009-07-02 |
| 20090168272 | PROTECTIVE CIRCUITRY FOR ELECTRONIC DEVICE - A protective circuitry ( | 2009-07-02 |
| 20090168273 | HYBRID HIGH VOLTAGE DC CONTACTOR WITH ARC ENERGY DIVERSION - A contactor may operate to interrupt current in a circuit while the circuit is operating under load. A shunt is provided to by-pass surge power current around contacts to reduce arcing. The shunt includes a solid-state switch that may be operated in a series of pulses during movement of the contacts. The pulse control unit may detect a potential for arcing and then provide for periodic pulsing operation of the shunt. Because the solid-state switch may operate discontinuously, the contactor may be constructed with a switch that is selected on a basis of its pulse rating. | 2009-07-02 |
| 20090168274 | METHOD AND SYSTEM OF PROVIDING OVERLOAD AND SHORT-CIRCUIT PROTECTION FOR SWITCHED MODE POWER SUPPLY - A method of providing overload and short-circuit protection for a Switched Mode Power Supply (SMPS). The method may rely upon sensing a temperature change rate for a component of the SMPS and implementing a protection scheme when the temperature change rate exceeds a desired temperature change rate. The implementation scheme may include permanently or temporarily shutting-off the component. | 2009-07-02 |
| 20090168275 | SHORT PROTECTION DEVICE FOR ALTERNATOR - A short circuit protection device for the protection of an alternator in which turning on/off a trigger switch causes conduction/cutoff of the field current of the field coil of the alternator is disclosed. The protection device enables the field current to pass through a sensor so that when the field current is abnormally high and the voltage drop across the sensor rises, the potential of an input end of a boost circuit electrically connected to the sensor correspondingly arises and an output end of the boost circuit electrically connected to a shutoff device drives the shutoff device to turn off the trigger switch, and the boost circuit further keeps the shutoff device in on-state to hold the trigger switch off till the short circuit condition is eliminated and the protection circuit system is reset. | 2009-07-02 |
| 20090168276 | Protection of Polarity-Sensitive Components Connected In Parallel With A Direct Current Motor Or Inductor - Circuits and methods for protecting polarity-sensitive components, such as light emitting diodes, electrolytic capacitors or integrated circuits, operating from a DC current source including a DC motor, an inductor or relay having a positive terminal and a negative terminal for receiving current from the current source, a protection diode connected parallel with the positive and negative terminals of the motor in a reverse bias configuration, at least one polarity-sensitive component connected in parallel with the protection diode and the DC motor, and a polarity protection transistor connected either between the nominally positive current source terminal and the positive motor terminal, or between the nominally negative current source terminal and the negative motor terminal. | 2009-07-02 |
| 20090168277 | SERIES ARC FAULT CURRENT INTERRUPTER APPARATUS - A circuit interrupter for interrupting alternating current electrical signal on a line conductor of a circuit feeding a load, including: an electrical contact in operatively connected in series with the line conductor; a trip mechanism for selectively opening the electrical contact when activated; a current sensor connected in series with the line conductor for obtaining a sample alternating current electrical signal from the circuit feeding the load; a microprocessor in electrical communication with the trip mechanism and comprising a series arc fault detection program resident thereon; the series arc detection program comprising a discrete wavelet transform for determining the presence of a series arc fault current in the circuit feeding the load; wherein, when the discrete wavelet transform determines the presence of a series arc fault, the microprocessors signals the trip mechanism to activate and open the electrical contact in operatively connected in series with the line conductor. | 2009-07-02 |
| 20090168278 | CIRCUIT DEVICE AND METHOD OF SUPRESSING A POWER EVENT - A circuit device includes a diode bridge having a first power input and a second power input and having a first output terminal and a second output terminal. The diode bridge includes a plurality of diodes and a respective plurality of diode bypass elements associated with the plurality of diodes. The circuit device further includes a logic circuit to detect a power event at the first and second power inputs and to selectively activate one or more of the respective plurality of diode bypass elements in response to detecting the power event to limit a rectified power supply at the first and second output terminals. | 2009-07-02 |
| 20090168279 | ESD protection circuit with gate voltage raising circuit - An ESD protection circuit with a gate voltage raising circuit is disclosed. The ESD protection circuit with a gate voltage raising circuit is used in a large size open drain circuit. A gate voltage raising circuit is used in the ESD protection circuit for raising the gate voltage of a NMOS. | 2009-07-02 |
| 20090168280 | ELECTROSTATIC DISCHARGE AVOIDING CIRCUIT - An ESD avoiding circuit includes a first ESD protection unit, an ESD detection unit, a switch unit, and an RC filter unit. The first ESD protection unit transmits an ESD current between a first conducting path and a second conducting path. The ESD detection unit is coupled to the first conducting path. The ESD detection unit includes an input terminal, and an output terminal coupled to the first ESD protection unit for detecting an ESD and controlling the first ESD protection unit to conduct the ESD current according to a detection result. The switch unit is coupled between the first conducting path and a core circuit and conducts the first conducting path to the core circuit according to signals of the input terminal and the output terminal of the ESD detection unit. The RC filter unit couples a first voltage to the input terminal of the ESD detection unit. | 2009-07-02 |
| 20090168281 | ELECTROSTATIC DISCHARGE LEADING CIRCUIT - An electrostatic discharge (ESD) leading circuit for a large-sized open drain circuit is provided. The ESD leading circuit utilizes a gate voltage boosting circuit to increase the gate voltage of an N-type MOS transistor. | 2009-07-02 |
| 20090168282 | ESD PROTECTION CIRCUIT - An ESD protection circuit includes: a voltage decreasing module, coupled between a first voltage level and a second voltage level, wherein the first voltage level is higher than the second voltage level; a gate trigger switch, coupled between the first voltage level and the second voltage level; and a detection circuit, coupled to the gate trigger switch, for detecting an ESD event to control the gate trigger switch. | 2009-07-02 |
| 20090168283 | VOLTAGE CONTROL CIRCUIT - A voltage control circuit includes first, second and third transistors, a relay, and first, second, and third resistors. The emitter of the first transistor is connected to a first power supply, the collector of the first transistor is connected to a first contact of the relay, a second contact of the relay is grounded; the collector of the third transistor is connected to the first power supply via the third resistor, and the emitter of the third transistor is grounded. The first and second resistors are connected in series between the positive electrode of the second power supply; the base of the second transistor is connected to a node between the first and second resistors, the collector of the second transistor is connected to the base of the third transistor, and the emitter of the second transistor is connected to the first power supply. | 2009-07-02 |
| 20090168284 | CIRCUIT ARRANGEMENT FOR DETECTING UNDERVOLTAGE IN AN ENERGY SOURCE - Disclosed is a circuit arrangement ( | 2009-07-02 |
| 20090168285 | CPU POWER CONTROL CIRCUIT - A CPU power control circuit includes a temperature detection circuit, a power supply circuit and a discharge circuit. The power supply circuit is connected to the temperature detection circuit, a CPU and the discharge circuit. The discharge circuit is connected to the temperature detection circuit and the CPU. The temperature detection circuit is connected to the CPU for detecting the temperature of the CPU. When the temperature of the CPU exceeds a predetermined range, the temperature detection circuit outputs a high temperature signal. The power supply circuit receives the high temperature signal, and stops working. The discharge circuit receives the high temperature signal, and discharges the power supply circuit so as to stop supplying power to the CPU. | 2009-07-02 |
| 20090168286 | SYSTEMS, METHODS, AND APPARATUS FOR SUPERCONDUCTING MAGNETIC SHIELDING - A localized area is at least partially contained within a perimeter of a shield ring formed by a closed superconducting current path of a material that is superconductive below a critical temperature. The shield ring is at least partially within a perimeter of a compensation coil that is coupled to a current source. One or more measurement devices are responsive to magnetic fields in the vicinity of the localized area, allowing compensation by controlling current to the compensation coil. A heater can raise temperature of the shield ring out of a superconducting condition. | 2009-07-02 |
