Kyung Hyun
Kyung Hyun Ahn, Seoul KR
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20110122803 | SMALL BASE STATION AND MANAGEMENT METHOD THEREOF - A small base station to provide a service wirelessly or through wires includes an operation mode management unit to determine an operating mode of the small base station. An operation method of the small base station may determine connection statuses of terminals, and may set an operation mode of a wireless communication unit as a sleep mode or an idle mode if all terminals registered in the small base station are wirelessly connected to the small base station. If there are registered terminals not located in the small base station cell area, the operation mode may be sleep mode. If there are terminals connected wirelessly to the small base station, the operation mode may be the active mode. | 05-26-2011 |
Kyung Hyun Baek, Goyang-Si KR
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20090258308 | Toner and Method of Preparing the Same - The present invention provides a toner having a core-shell structure which is formed by aggregation-coalescence of latex particles having bimodal particle size distribution. The toner according to the present invention can prevent scattering and image offset by enhancing adhesiveness and charge-up rate. The toner can also have controlled particle morphology of the particles and a uniform particle size distribution. | 10-15-2009 |
Kyung Hyun Baek, Uiwang-Si KR
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20090137766 | Silicone Particle with Excellent Hydrophobic and Alkali Proof Properties, Method for Preparing the Same and Coating Composition Using the Same - Disclosed herein is a silicone particle with excellent hydrophobic and alkali proof properties. The present invention provides a method of controlling surface hydroxyl groups by treating the surface of silicone particles with alkali metal ions or alkaline earth metal ions. The present invention also provides a coating composition using the silicone particle, in which the amount of hydroxyl groups present on the surface of the silicone particle can be controlled. | 05-28-2009 |
20110123807 | Thermally-Expandable Microspheres Having Good Foaming Characteristics and Uniform Microsphere Diameter and Methods of Preparing the Same - The present invention provides a thermally expandable microsphere having a core-shell structure comprising: a shell including a thermoplastic polymer and a long-chain crosslinking agent having a weight-average molecular weight between cross-linking sites of more than about 500; and a core including a foaming agent. The thermally expandable microsphere of the present invention can have excellent foaming characteristics and an even (uniform) microsphere diameter. | 05-26-2011 |
20130150470 | Highly Insulating Polyurethane Foam and Method for Manufacturing Same - The rigid polyurethane foam includes thermally expandable fine particles disposed between two or more adjacent cells, so as to be exposed to the inside and/or the outside of a unit cell, and a filler which is dispersed on the surface of the thermally expandable fine particles and/or on the inner and/or outer surfaces of the unit cell. The cells of the rigid polyurethane foam can be small and uniform in size and can be highly insulating. | 06-13-2013 |
Kyung Hyun Han, Suwon-Si KR
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20080248650 | Etching apparatus and method for semiconductor device - Disclosed is an etching method for a semiconductor device. The protecting layer, such as the hydrocarbon layer or the hydrocarbon layer containing phosphorous, is formed on the photoresist layer by using the precursor gas containing no fluorine. Therefore, the etching process enabling the thin photoresist to have a high selectivity can be performed, thereby improving the etching efficiency. The method includes the steps of placing a semiconductor substrate in a chamber, in which a material layer is formed on the semiconductor substrate and a photoresist layer is formed on the material layer, forming a hydrocarbon layer on the photoresist layer by introducing precursor gas containing no fluorine into the chamber and etching an etching target material by introducing etching gas into the chamber. | 10-09-2008 |
20080314318 | Plasma processing apparatus and method thereof - Disclosed is a plasma processing apparatus and a method thereof. A plasma processing apparatus includes a chamber for processing a semiconductor substrate by generating plasma, upper and lower electrodes installed in the chamber, a high frequency power supply for supplying high frequency power to the upper and lower electrodes, and a phase controller adjusting a phase difference of the high frequency power supplied to the upper and lower electrodes. | 12-25-2008 |
Kyung Hyun Hwang, Seoul KR
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20090302506 | Ultra Water Repellent Film Manufacturing Equipment and Method - Provided are ultra water repellent film manufacturing equipment capable of continuous manufacturing of an ultra water repellent film through casting and separating a hydrophilic or hydrophobic polymer on an outer surface of a rotating belt, and an ultra water repellent film manufacturing method using the equipment. The equipment includes the rotating belt wound around rollers to continuously rotate, a polymer supplying member ( | 12-10-2009 |
20100091107 | HIGH SPEED OPTICAL MONITORING SYSTEM - The present invention discloses a high speed optical monitoring system being capable of monitoring clearly a subject at a high speed and having a small dimension. The high speed optical monitoring system for monitoring at least one subject which is in a stationary state or being moved, comprises at least one subject source for generating the subject; a subject source support for aligning and supporting the subject source so as to allow the subject to be placed on an identical focal space plane; an image acquisition means provided with an electrically-powered zoom lens capable of controlling a focal length between the image acquisition means and the subject, a magnification and a depth; a mirror body mounted between the subject and the image acquisition means; a mirror driving unit for changing a rotational angle of the mirror body; an image processing unit for processing an image acquired by the image acquisition means into digital data; a lighting means for illuminating the subject; and a control unit for controlling the lighting means and driving of the subject source, the image acquisition means and the mirror. | 04-15-2010 |
Kyung Hyun Jang, Cheongju KR
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20140118641 | TOUCH SCREEN SENSOR SUBSTRATE, TOUCH SCREEN SENSOR, AND PANEL COMPRISING SAME - The present invention relates to a touch screen sensor substrate, to a touch screen sensor, and to a touch screen panel comprising same. The touch screen sensor substrate according to the present invention comprises: a plurality of sensing units formed of electrodes connected into a pattern of a predetermined direction at one surface of a base; and a connection unit which is formed of electrodes connected into a pattern of a direction which is the same as or similar to the direction of the pattern of the sensing units, and which connects the sensing units. | 05-01-2014 |
20140131075 | WIRED ELECTRODE OF TOUCH SCREEN PANEL - Disclosed is a wired electrode of touch screen panel for transmitting a touch signal sensed by a signal sensing pattern of touch screen panel to an external driving circuit, wherein the wired electrode formed on a substrate includes at least one curved portion, and a plurality of fine protrusions are formed on an inner surface of a groove of a resin layer on the substrate. The groove is filled with a conductive material to form the wired electrode. | 05-15-2014 |
Kyung Hyun Kim, Seosan-Si KR
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20120168982 | METHOD FOR MANUFACTURING ETHYLENE VINYL ACETATE COPOLYMER SHEET FOR SOLAR CELL ENCAPSULANT - Provided is a method for manufacturing a sheet for a solar cell encapsulant which has stability against yellowing after a crosslinking process and thus good appearance with improved productivity in the sheet manufacture process, specifically to a method for manufacturing a sheet for a solar cell encapsulant characterized by melt-mixing a resin composition with an organic peroxide, a co-crosslinking agent and a silane coupling agent at the degradation temperature of the organic peroxide or less, wherein the resin composition is obtained by melt-mixing EVA resin with an antioxidant, an UV absorber and a light stabilizer at 80-220° C., and forming a sheet from the obtained melt-mixed resin composition. | 07-05-2012 |
Kyung Hyun Ko, Seoul KR
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20130037174 | METHOD FOR NITRIDING SURFACE OF ALUMINUM OR ALUMINUM ALLOY BY COLD SPRAY METHOD - Provided is a method of nitriding a surface of aluminum or aluminum alloy by cold spraying. That is, a surface of aluminum or aluminum alloy is coated by cold spraying, and then a heat treatment is performed thereon at low temperature for a short time period. Accordingly, the method is suitable for nitriding a surface of Al and Al alloy, which is very difficult to be nitrided, at low production costs. The method includes removing a foreign material from a surface of a mother substrate comprising Al or Al alloy; cold spraying 15 to 50 wt % of a catalyst powder and 50 to 85 wt % of a coating agent powder on the surface of the mother substrate to form a coating layer; and heat treating the coating layer at a temperature of 450 to 630° C. in a nitrogen atmosphere for 2 to 24 hours. | 02-14-2013 |
20130115378 | PRE-TREATMENT APPARATUS AND METHOD FOR IMPROVING ADHESION OF THIN FILM - Provided are a pre-treatment apparatus and method for improving an adhesion of a thin film The pre-treatment apparatus includes: a gas compressor that compresses gas supplied from the outside and contained, and supplies a process gas that is compressed; a powder feeder for supplying a coating powder including a single metal or alloy supplied from the outside and contained; and a spray nozzle through which the process gas supplied from the gas compressor and the coating powder supplied from the powder feeder are cold sprayed on a surface of a base metal on which a thin film is to be deposited so as to form a porous metal coating layer on the surface of the base metal. The pre-treatment method includes: preparing a base metal including a single metal or alloy; preparing a coating powder including powder of one or more single metals or an alloy thereof; forming a porous metal coating layer on a surface of the base metal, on which a thin film is to be deposited, by cold-spraying the coating powder and a process gas to the surface of the base metal; and depositing the thin film on the coating layer, wherein the thin film includes metal. | 05-09-2013 |
Kyung Hyun Nam, Jeollabuk-Do KR
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20160108648 | ACTUATOR INTEGRATED PUSH OPENER - An actuator integrated push opener includes a fuel inlet door of a vehicle to open and close a vehicle fuel inlet. A housing accommodates a motor having a worm mounted on a rotational shaft and has a guide hole formed. A striker is mounted in the housing, penetrates through the guide hole, and is connected to the fuel inlet door. A gear is mounted in the housing and engaged with the worm. A catch has an inserting protrusion which is inserted into a through-hole formed in the striker and mounted in the housing to rotate based on a rotation center of the gear. A gear spring is provided in the catch so that the catch constantly rotates in a direction toward the striker. A stopper is mounted to the gear to limit the rotation of the catch. | 04-21-2016 |
Kyung Hyun Park, Gyeonggi-Do KR
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20150337856 | ELECTRIC BLOWER - Embodiments of the invention provide an electric blower, including a diffuser having a cover and an impeller sequentially disposed at one side in a shaft direction thereof, a front disposed at the other side in the shaft direction of the diffuser, and an elastic body mounted between the front and the diffuser to support the diffuser. | 11-26-2015 |
Kyung Hyun Park, Daejeon KR
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20100119231 | PLANAR LIGHTWAVE CIRCUIT (PLC) DEVICE WAVELENGTH TUNABLE LIGHT SOURCE COMPRISING THE SAME DEVICE AND WAVELENGTH DIVISION MULTIPLEXING-PASSIVE OPTICAL NETWORK (WDM-PON) USING THE SAME LIGHT SOURCE - In the manufacture and application of a PLC-ECL type wavelength tunable light source, provided is a wavelength tunable mechanism with improved performance and stability, a light source with improved packaging performance and mass productivity, and a light source applied to a WDM-PON with initialization and stabilization functions. The wavelength tunable light source having a PLC (planar lightwave circuit)-ECL (external cavity laser) structure includes a first housing in which a semiconductor optical gain medium is mounted, a second housing in which a PLC device is mounted, and a third housing in which an optical fiber is mounted. The first, second, and third housings make an optical axis alignment through an optical coupling lens and combined in a laser welding method. | 05-13-2010 |
20100142571 | MULTIPLE DISTRIBUTED FEEDBACK LASER DEVICES - Provided is a multiple distributed feedback laser device. The laser device includes an active layer, a first diffraction grating, and a second diffraction grating. The substrate includes a first distributed feedback region, a modulation region, and a second distributed feedback region. The first diffraction grating is coupled to the active layer in the first distributed feedback region. The second diffraction grating is coupled to the active layer in the second distributed feedback region. In addition, the laser device includes a first micro heater and a second micro heater. The first micro heater supplies heat to the first diffraction grating. The second micro heater supplies heat to the second diffraction grating. The first micro heater and the second micro heater are controlled independently from each other. | 06-10-2010 |
20100158056 | SEMICONDUCTOR LASER DEVICE - Provided is a semiconductor laser device including: a gain area where multi-wavelength lights are generated and gain are provided; a first reflection area where among the multi-wavelength lights, a first-wavelength light is reflected to the gain area in response to a first selection signal; a second reflection area where among the multi-wavelength lights, a second-wavelength light is reflected to the gain area; and a phase control area where a phase of the second-wavelength light is shifted in response to a phase control signal, the phase control area being disposed between the first reflection layer and the second reflection layer. | 06-24-2010 |
20110068270 | APPARATUS FOR GENERATING/DETECTING THZ WAVE AND METHOD OF MANUFACTURING THE SAME - Provided are an apparatus for generating/detecting terahertz wave and a method of manufacturing the same. The apparatus includes a substrate, a photo conductive layer, a first electrode and a second electrode, and a lens. The photo conductive layer is formed on an entire surface of the substrate. The first electrode and a second electrode are formed on the photo conductive layer. The first and second electrodes are spaced from each other by a certain gap. The lens is formed on the first and second electrodes. The lens is filled in the gap between the first and second electrodes. | 03-24-2011 |
20110142082 | FIBER LASER - Provided is a fiber laser generating Terahertz wave. The fiber laser comprises: a light source generating a laser beam as a pump light; first and second resonators first and second resonators first and second resonators resonating the laser beam into first and second wavelengths; and a coupler separating and supplying the laser beam generated in the light source to the first and second resonators and again feeding back the laser beam having the first and second wavelengths resonated respectively in the first and second resonators to the light source. | 06-16-2011 |
20110149368 | PHOTOMIXER MODULE AND TERAHERTZ WAVE GENERATION METHOD THEREOF - Provided are a photomixer module and a method of generating a terahertz wave. The photomixer module includes a semiconductor optical amplifier amplifying incident laser light and a photomixer that is excited by the amplified laser light to generate a continuous terahertz wave. The photomixer is formed as a single module together with the semiconductor optical amplifier. | 06-23-2011 |
20110150018 | LASER DEVICE - Provided is a laser device. In the laser device, an active layer is connected to a stem core of a 1×2 splitter on a substrate, a first diffraction grating is coupled to a first twig core of the 1×2 splitter, and a second diffraction grating is coupled to a second twig core of the 1×2 splitter. An active layer-micro heater is designed to supply heat to the active layer. First and second micro heaters are designed to supply heats to the first and second diffraction gratings, respectively, thereby varying a Bragg wavelength. | 06-23-2011 |
20110192978 | TERAHERTZ WAVE APPARATUS - Provided is a terahertz wave apparatus. The terahertz wave apparatus includes: a wavelength-fixed laser emitting a first laser light having a fixed first wavelength; a wavelength-swept laser emitting a second laser light having a tunable second wavelength; a coupler coupling the first laser light with the second laser light; and a generator converting a mixed light emitted from the coupler into a terahertz wave, wherein a frequency of the terahertz wave is continuously tunable. | 08-11-2011 |
20120068090 | FREQUENCY TUNABLE TERAHERTZ TRANSCEIVERS AND METHOD OF MANUFACTURING DUAL WAVELENGTH LASER - Provided are a frequency tunable terahertz transceiver and a method of manufacturing a dual wavelength laser. The frequency tunable terahertz transceiver includes: a dual wavelength laser including two distributed feedback lasers that are manufactured in one substrate and output optical signals of respectively different wavelengths; and an optical device receiving the outputted optical signals to generate a terahertz wave. | 03-22-2012 |
20120147907 | TERAHERTZ WAVE GENERATOR - Disclosed is a terahertz wave generator which includes a dual mode semiconductor laser device configured to generate at least two laser lights having different wavelengths and to beat the generated laser lights; and a photo mixer formed on the same chip as the dual mode semiconductor laser device and to generate a continuous terahertz wave when excited by the beat laser light. | 06-14-2012 |
20120153161 | THz-WAVE GENERATION /DETECTION MODULES AND DEVICES INCLUDING THE SAME - Provided are a THz-wave generation/detection module and a device including the same, which increase heating efficiency and are miniaturized. The module includes a photomixer chip, a lens, a PCB, and a package. The photomixer chip includes an active layer, an antenna, and a plurality of electrode pads. The lens is disposed on the photomixer chip. The PCB includes a plurality of solder balls connected to the electrode pads, under the photomixer chip. The package surrounds a bottom and side of the PCB, and dissipates heating of the active layer, which is transferred from the electrode pad of the photomixer chip to the PCB, to outside. | 06-21-2012 |
20130161541 | TERAHERTZ WAVE GENERATOR AND METHOD OF GENERATING TERAHERTZ WAVE - Disclosed is a terahertz wave generator which includes a first light source outputting a first light having a first frequency; a second light source outputting a second light having a second frequency different from the first frequency; a second harmonic generation unit performing second harmonic conversion on the first and second lights to generate a third light and a fourth light; and a photomixer converting a mixing light of the third and fourth lights into a terahertz wave alternating signal and outputting a terahertz wave. | 06-27-2013 |
20130299701 | PHOTO DETECTOR AND OPTICAL DEVICE - An optical device may include first and second lasers generating first and second laser beams; and a photo detector detecting the first and second laser beams. The optical detector comprises a substrate, a first impurity layer on the substrate, an absorption layer on the first impurity layer and a second impurity layer on the absorption layer. The absorption layer generates a terahertz by a beating of the first and second laser beams and has a thickness of less than | 11-14-2013 |
20130320215 | INTERCONNECTION APPARATUS AND METHOD USING TERAHERTZ WAVES - Disclosed herein is an interconnection apparatus and method using terahertz waves. The interconnection apparatus using terahertz waves according to the present invention includes a first terahertz wave generation unit for generating a first transmission terahertz wave, a center frequency of which is a first center frequency, using photomixing. A second terahertz wave generation unit generates a second transmission terahertz wave, a center frequency of which is a second center frequency different from the first center frequency. A first terahertz wave detection unit detects a first reception terahertz wave corresponding to the first transmission terahertz wave. A second terahertz wave detection unit detects a second reception terahertz wave corresponding to the second transmission terahertz wave. | 12-05-2013 |
20140061475 | APPARATUS AND METHOD FOR CONTACTLESS THICKNESS MEASUREMENT - A contactless thickness measuring apparatus is provided which includes an terahertz transmitter configured to receive the first optical path signal from the coupler and to generate a terahertz continuous wave using the first optical signal and an applied bias; an optical delay line configured to delay the second optical path signal output from the coupler; and an terahertz receiver configured to receive the terahertz continuous wave penetrating a sample and to detect an optical current using the terahertz continuous wave and the second optical path signal delayed. A thickness of the sample is a value corresponding to the optical current which phase value becomes a constant regardless of a plurality of measurement frequencies. | 03-06-2014 |
20140154822 | METHOD OF MANUFACTURING FREQUENCY TUNABLE TERAHERTZ TRANSCEIVER - A method of manufacturing a frequency tunable terahertz transceiver including two separate distributed feedback lasers manufactured in one substrate, includes forming a lower clad layer on the substrate, forming an active layer on the lower clad layer, forming an upper clad layer on the active layer. And interposing first and second diffraction grating layers between the upper clad layers. A diffraction grating is manufactured by etching the first and second diffraction grating layers. The active layer is integrated into a passive waveguide. An electrode is formed on the upper clad layer. | 06-05-2014 |
20140166881 | TERAHERTZ WAVE GENERATING MODULE AND TERAHERTZ WAVE DETECTING DEVICE INCLUDING THE SAME - A terahertz wave generating module includes a bidirectional light source which provides a first dual-mode beam in a first direction and a second dual-mode beam in a second direction; a forward lens unit which focuses the first dual-mode beam; a photomixer unit which converts the first dual-mode beam focused by the forward lens unit into a terahertz wave; a backward lens unit which focuses the second dual-mode beam; and a light output unit which uses the second dual-mode beam focused by the backward lens unit as a light signal, wherein the bidirectional light source, the forward lens unit, the photomixer unit, the backward lens unit, and the light output unit are integrated in a housing. | 06-19-2014 |
20140175306 | BEATING SIGNAL MONITORING MODULE, TERAHERTZ WAVE GENERATION DEVICE AND OPTICAL SIGNAL MONITORING DEVICE INCLUDING THE BEATING SIGNAL MONITORING MODULE - The inventive concept relates to a beating signal monitoring module and a terahertz wave generation device and an optical signal monitoring device that including the beating signal monitoring module. The beating signal monitoring module includes a nonlinear unit generating an optical signal including a FWM light in response to a beating signal generated from a first light and a second light; a filter unit separating the FWM light from the optical signal and outputting the separated FWM light; and a monitoring unit monitoring the beating signal using the separated FWM light. The beating signal monitoring module and a terahertz wave generation device and an optical signal monitoring device that including the beating signal monitoring module can effectively monitor a beating signal being generated by two lasers using a Four Wave Mixing signal. | 06-26-2014 |
20140183441 | APPARATUS FOR GENERATING/DETECTING TERAHERTZ WAVE USING GRAPHENE AND MANUFACTURING METHOD OF THE SAME - Provided is a terahertz wave generating/detecting apparatus and a method for manufacturing the same. The terahertz wave generating/detecting apparatus includes; a substrate having an active region and a transmitting region; a lower metal layer extending in a first direction on the active region and the transmitting region of the substrate; a graphene layer disposed on the lower metal layer on the active region; and upper metal layers extending in the first direction on the graphene layer of the active region and the substrate in the transmission region, wherein a terahertz wave is generated or amplified by a surface plasmon polariton that is induced on a boundary surface between the graphene layer and the lower metal layer by beated laser light applied to the graphene layer and the metal layer. | 07-03-2014 |
20140197425 | WIDE AREA ARRAY TYPE PHOTONIC CRYSTAL PHOTOMIXER FOR GENERATING AND DETECTING BROADBAND TERAHERTZ WAVE - Provided is a broadband photomixer technology that is a core to generate continuous frequency variable and pulsed terahertz waves. It is possible to enhance light absorptance by applying the transmittance characteristic of a 2D light crystal structure and it is possible to increase the generation efficiency of terahertz waves accordingly. Moreover, it is possible to implement a wide area array type terahertz photomixer by applying an interdigit structure and spatially properly arranging a light crystal structure having various cycles. Accordingly, it is possible to solve difficulty in thermal characteristic and light alignment by mitigating the high light density of a light absorption unit and low photoelectric conversion efficiency is drastically improved. In addition, the radiation pattern of terahertz waves may be electrically controlled through the present invention. | 07-17-2014 |
20150090906 | TERAHERTZ CONTINUOUS WAVE EMITTING DEVICE - Provided herein is terahertz continuous wave emitting device having: a plurality of laser light sources generating a plurality of laser lights; and an absorption area formed between the plurality of laser light sources in order to adjust interaction of the plurality of laser lights, wherein the absorption area is configured to have a photo diode, an antenna integrated into the photo diode. | 04-02-2015 |
20150102222 | PHOTOMIXER FOR GENERATING AND DETECTING TERAHERTZ CONTINUOUS WAVE AND METHOD OF MANUFACTURING THE SAME - Disclosed is a photomixer for generating and detecting a terahertz continuous wave, including: an optical conductor to which beating light is incident; and a plurality of antenna feeding electrodes formed on both side surfaces of the optical conductor, and configured to receive a current of a terahertz frequency. | 04-16-2015 |
20150179842 | RECTIFIER AND TERAHERTZ DETECTOR USING THE SAME - Disclosed is a rectifier capable of performing a high speed rectifying operation, and includes: a first semiconductor layer; a second semiconductor layer; and a third semiconductor layer, in which the first semiconductor layer and the third semiconductor layer are formed of semiconductor layers having the same type, and the second semiconductor layer is formed between the first semiconductor layer and the third semiconductor layer, is formed of a semiconductor layer having a different type from that of the first semiconductor layer and the third semiconductor layer, and is formed in graded doped state. | 06-25-2015 |
20150277208 | PHOTO MIXER AND METHOD FOR MANUFACTURING SAME - Disclosed herein is a photomixer and method of manufacturing the photomixer which can fundamentally solve the existing restrictive factors of a PCA and a photomixer which are core parts of a conventional broadband terahertz spectroscopy system. The presented photomixer includes an active layer formed on a top surface of a substrate, the active layer being formed on an area on which light is incident, and a thermal conductive layer formed on the top surface of the substrate, the thermal conductive layer being formed on an area other than the area on which light is incident. The active layer is formed to have a mesa cross section, and the thermal conductive layer is regrown on an area other than the area on which light is incident using an MOCVD method, and has a flattened surface. | 10-01-2015 |
Kyung-Hyun Cho, Suseong-Gu KR
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20090208986 | Method and kit for diagnosing acute myocardial infarction - Disclosed herein are method and kit for diagnosing acute myocardial infarction which is capable of predicting and diagnosing whether coronary artery disease is proceed to myocardial infarction or not by using an increase in triglyceride level in high density lipoprotein (HDL) or low density lipoprotein (LDL), a decrease in cholesterol level in HDL, increase of interleukin-6, CETP (cholesteryl ester transfer protein) and apo (apolipoprotein) C-III as a biomarker that are characteristic changes occurred only in sera of myocardial infarction patients among patients with coronary artery disease. | 08-20-2009 |
Kyung-Hyun Ko, Kyunggi-Do KR
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20080220234 | Method of Preparing Wear-Resistant Coating Layer Comprising Metal Matrix Composite and Coating Layer Prepared Thereby - The invention provides a method of preparing a wear-resistant coating layer comprising metal matrix composite and a coating layer prepared by using the same and more particularly, it provides a method of preparing a wear-resistant coating layer comprising metal matrix composite, which comprises the steps of providing a base material, preparing a mixture powder comprising a metal, alloy or mixture particle thereof having an average diameter of 50 to 100 um and a ceramic or mixture particle thereof having an average diameter of 25 to 50 um in a ratio of 1:1 to 3:1 by volume, injecting the mixture powder into a spray nozzle for coating, and coating the mixture powder on the surface of the base material by accelerating the mixture powder in the state of non-fusion at a rate of 300 to 1,200 m/s by the flow of transportation gas flowing in the nozzle and a coating layer prepared by using the same whereby the coating layer with high wear resistance and excellent resistance against fatigue crack on the surface of the base material without causing damages such as heat strain to the base material during the formation of the coating layer can be provided. | 09-11-2008 |
20090120539 | Method of Preparing Metal Matrix Composite and Coating Layer and Bulk Prepared Thereby - This invention provides a method of preparing a metal matrix composite, and a coating layer and bulk prepared by using the same and in particular, it provides a method of preparing a metal matrix composite, which comprises the steps of providing a substrate; preparing a mixed powder comprising i) a first metal powder comprising a metal, alloy or mixture particle thereof, ii) a second metal powder comprising an intermetallic compound forming metal particle which forms an intermetallic compound along with the metal or the alloy element of the alloy, and iii) a ceramic powder comprising a ceramic or mixture particle thereof; injecting the mixed powder prepared above into a spray nozzle for coating; coating the mixed powder on the surface of the substrate by accelerating the mixed powder in the state of non-fusion at a speed of 300 to 1,200 m/s by the flow of transportation gas flowing in the spray nozzle; and forming the intermetallic compound by the thermal treatment of the coated coating layer, and a coating layer and bulk prepared by using the same, whereby the coating layer and bulk material with high wear resistance and excellent resistance against fatigue crack on the surface without causing damages such as heat strain to the substrate during the preparation of the coating layer can be provided. | 05-14-2009 |
Kyung-Hyun Min, Yongin-Si, Gyeonggi-Do KR
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20150352049 | PHARMACEUTICAL COMPOSITION FOR PROTECTING WOUNDS, PROVIDING HEMOSTASIS, OR PREVENTING ADHESION IN THE GASTROINTESTINAL TRACT - The present invention provides a pharmaceutical composition in a powder form for providing wound protection, hemostasis, or anti-adhesion in the gastrointestinal tract, which comprises a certain mucoadhesive polymer; and a certain hygroscopic agent. | 12-10-2015 |
Kyung-Hyun Min, Yuseong-Gu KR
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20090306140 | 3 or 4-Substituted Piperidine Compounds - There are disclosed racemic or enantiomerically enriched 3- or 4-substituted piperidine compounds represented by the following structural formula (I) | 12-10-2009 |
20120046312 | 3-SUBSTITUTED PROPANAMINE COMPOUNDS - Racemic or enantiomerically enriched 3-substituted propanamine compounds represented by the following structural formula (I): | 02-23-2012 |
Kyung-Hyun Paeng, Busan KR
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20150026013 | SYSTEM AND METHODS FOR COGNITIVE VISUAL PRODUCT SEARCH - A visual product searching apparatus includes a product area determining part, a visual word generating part and a product searching part. The product area determining part extracts a product area in an input image. The visual word generating part generates a visual word reflecting human visual cognitive characteristics based on the product area. The product searching part searches a product using the visual word. | 01-22-2015 |
Kyung-Hyun Park, Changwon-Si KR
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20140246899 | LOWER TRACK OF CRAWLER EXCAVATOR - Disclosed is a lower track for mounting rubber pads on a track shoe to be attachable and detachable after assembling a steel plate which is adhered with divisionally formed rubber pads as a single unit without additionally perforating coupling through-holes in the track shoe when the rubber pad which forms the lower track and the track shoe which is formed of a metal material are coupled. The lower track of a crawler excavator according to the present invention comprises: first and second rubber pads which are divisionally formed; a first steel plate which supports the bottom surface of the first rubber pad by surrounding the same, and has first hooks formed on the bottom surface thereof and coupling holes formed in a connection stepped-portion, which is formed at the opposite side of the first hooks; a second steel plate which supports the bottom surface of the second rubber pad by surrounding the same, and has second hooks formed on the bottom surface thereof, connection protrusions formed at the opposite side of the second hooks so as to be secured on the connection stepped-portion, and connection through-holes formed in the protrusions so as to correspond to the coupling holes; and coupling members sequentially passing through the through-holes formed in the second rubber pad and the through-holes formed in the second steel plate so as to be fixed in the coupling holes of the first steel plate. | 09-04-2014 |