Patents by Inventor Chang Song

Chang Song has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8008677
    Abstract: A light emitting device comprises a light emitting element having a first electrode and a second electrode, and a semiconductor member having a cavity in a principal surface thereof, inside which the light emitting element is mounted, and electrically connected to the light emitting element, wherein the semiconductor member is constructed as a voltage regulating diode for stabilizing a voltage supplied from the exterior. As a result, the light emitting element can be protected from a static electricity or a surge voltage flowed therein from the exterior, the entire size of the system can be remarkably reduced so as to simplify a structure thereof, and heat generated from the system can be effectively discharged to the exterior. In addition, by providing a reflection portion in the cavity, light emitted from the light emitting element can be efficiently condensed.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: August 30, 2011
    Assignee: LG Electronics Inc.
    Inventors: Geun-Ho Kim, Ki-Chang Song
  • Publication number: 20110020724
    Abstract: An electrode for a fuel cell includes a gas diffusion layer contacting with a separator having a channel and a catalyst layer interposed between the gas diffusion layer and an electrolyte membrane. The catalyst layer of the electrode has two portions with different hydrophilicities. A portion of the catalyst layer that faces a channel has a higher hydrophilicity than a portion that does not face a channel. This electrode may control hydrophilicity of the catalyst layer differently according to locations, so it is possible to keep an amount of moisture in an electrode in a suitable way, thereby improving the performance of the cell.
    Type: Application
    Filed: December 23, 2008
    Publication date: January 27, 2011
    Applicant: LG CHEM, LTD.
    Inventors: Hyuk Kim, Seong-Uk Jeong, Chang-Song Lee, Won-Ho Lee
  • Patent number: 7868349
    Abstract: A light source apparatus and a fabrication method thereof can prevent light interference between light emitting devices adjacent to each other and increase the luminous efficiency by collecting light emitted from the side of the light emitting device toward the front of a metal stem by forming grooves at a sub-mounts, bonding the light emitting device to the inside of the groove by a flip chip bonding method and forming a reflective layer inside the groove.
    Type: Grant
    Filed: February 17, 2005
    Date of Patent: January 11, 2011
    Assignee: LG Electronics Inc.
    Inventors: Geun-Ho Kim, Ki-Chang Song
  • Publication number: 20100304269
    Abstract: The present invention relates to an electrode for a fuel cell including a catalyst layer that includes a catalyst portion containing a plurality of first catalyst particles dispersed in an ionomer binder resin; and an ionomer portion containing a plurality of second catalyst particles dispersed in an ionomer binder resin, and having a lower concentration of catalyst particles than the catalyst portion, wherein the ionomer portion has a shape of a wall or plural pillars in the catalyst portion. The electrode for a fuel cell according to the present invention has a separate ionomer portion in the catalyst layer, and thus has excellent ion conductivity in an electrode layer and the remarkably improved reaction surface area to enhance the performance of the fuel cell.
    Type: Application
    Filed: October 6, 2008
    Publication date: December 2, 2010
    Applicant: LG CHEM, LTD.
    Inventors: Hyuk Kim, Won-Ho Lee, Chang-Song Lee, Seong-Uk Jeong, Sang-Hyun Lee
  • Publication number: 20100297155
    Abstract: A phosphazene-based polymer hydrogel with a chemical cross-linkings formed by radiating ultraviolet (UV) and/or mixing with cross-linking agent and/or enzyme, a method of preparing the same, and a hydrogel forming a chemical cross-linking by radiating ultraviolet and/or mixing with a cross-linking agent and/or an enzyme; where the hydrigel shows a sol-gel behavior and has an excellent solidity by containing the phosphazene-based polymer that is capable of cross-linking at a certain concentration, are provided.
    Type: Application
    Filed: May 23, 2008
    Publication date: November 25, 2010
    Inventors: Soo-Chang Song, Thrimoorthy Potta, Sun-Mi Lee
  • Publication number: 20100297519
    Abstract: A cathode for a fuel cell includes a gas diffusion layer contacting with a separator having a channel and a catalyst layer interposed between the gas diffusion layer and an electrolyte membrane. The catalyst layer of the cathode has two portions with different water-repelling properties, and a portion of the catalyst layer that does not face a channel has a higher water-repelling property than a portion that faces a channel. This cathode controls water-repelling property of the catalyst layer differently according to locations, so it is possible to keep an amount of moisture in an electrode in a suitable way and to restrain generation of flooding, thereby improving the performance of the cell.
    Type: Application
    Filed: October 8, 2008
    Publication date: November 25, 2010
    Applicant: LG Chem, Ltd
    Inventors: Hyuk Kim, Won-Ho Lee, Chang-Song Lee, Seong-Uk Jeong, Sang-Hyun Lee
  • Publication number: 20100207652
    Abstract: A method of testing a wafer capable of minimizing the asymmetrical thermal deformation of a probe card when a wafer is tested using a probe card and of minimizing the number of times of tests to effectively test a large area wafer and a probe card for the same is presented. For the wafer test method for testing semiconductor chips on a wafer using a probe card, the method includes creating virtual repeating units corresponding to N semiconductor chips, wherein the N is natural number larger than or equal to 2, arranging the plurality of repeating units on the wafer and moving the probe card or the wafer N times and testing the semiconductor chips on a wafer, wherein the semiconductor chips in the repeating units are sequentially tested one by one per each touchdown. Also, the probe cards to realize above mentioned method have been described.
    Type: Application
    Filed: October 8, 2008
    Publication date: August 19, 2010
    Inventors: In Buhm Chung, Byung Chang Song, Dong Il Kim
  • Publication number: 20100187556
    Abstract: A light emitting device package capable of emitting uniform white light and a method for manufacturing the same are disclosed. The light emitting device package includes a package body, an electrode formed on at least one surface of the package body, a light emitting device mounted on the package body, and a phosphor layer enclosing the light emitting device while having a uniform thickness around the light emitting device.
    Type: Application
    Filed: April 7, 2010
    Publication date: July 29, 2010
    Inventors: Geun ho Kim, Yu Ho Won, Chil Keun Park, Ki Chang Song
  • Publication number: 20100099205
    Abstract: A method of manufacturing a liquid crystal display device is provided which includes ashing first and second photoresist patterns, whereby a copper oxide film is formed at portions of a data line and a source-drain pattern exposed between the ashed first and second photoresist patterns and between the ashed first and second portions of the first photoresist pattern; deoxidizing or removing the copper oxide film; performing a plasma treatment to change the exposed portions of the data line and the source-drain pattern into a copper compound; removing the copper compound using a copper compound removing solution to form source and drain electrodes below the ashed first and second portions, respectively, wherein the copper compound removing solution substantially has no reaction with the copper group material; dry-etching a portion of an ohmic contact layer between the source and drain electrodes using the source and drain electrodes as an etching mask, the ohmic contact layer formed by patterning the impurity-d
    Type: Application
    Filed: September 29, 2009
    Publication date: April 22, 2010
    Inventors: Kang-Il Kim, Joon-Young Yang, Kye-Chang Song, Soopool Kim, Young-Kwon Kang
  • Publication number: 20100028551
    Abstract: Provided is a method for forming a high-hardness inorganic coating layer, which is capable of providing a coating layer having abrasion resistance, chemical resistance, contamination resistance, high hardness and non-flammability on a surface of a metal or non-ferrous metal substrate at room temperature. The method comprises cleaning a substrate surface to remove impurities; subjecting a substrate surface to ultrasonic cleaning; preparing a high-hardness inorganic coating composition; coating the substrate surface with the high-hardness inorganic coating composition to form a high-hardness coating layer; drying the high-hardness coating layer; and heating the substrate at a temperature of 250 to 27O0C to cure the high-hardness coating layer.
    Type: Application
    Filed: November 28, 2007
    Publication date: February 4, 2010
    Inventors: Woo-Jae Lee, Jeong-Hoon Lee, Woo-Chang Song
  • Patent number: 7582537
    Abstract: A zener diode and methods for fabricating and packaging same are disclosed, whereby contact hole forming process exposing a diffusion layer is removed to enable to simplify the fabricating process, and the diffusion length not contacting the electrode line is determined by the crosswise length toward which the impurity is diffused to enable to reduce the zener impedance value. Furthermore, wet etching is used following the diffusion to remove the diffusion masks such that no damage is given to the diffusion layers to thereby enable to improve the zener diode characteristics.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: September 1, 2009
    Assignee: LG Electronics Inc.
    Inventors: Ki Chang Song, Geun Ho Kim
  • Publication number: 20090181088
    Abstract: The present invention relates to a poly(organophosphazene)-bioactive molecule conjugates in which biodegradable and thermosensitive poly(organophosphazene) with a functional group showing the sol-gel phase transition with change of temperature is combined with various bioactive molecules, such as drugs, a preparation method thereof, and a use thereof for delivery of bioactive molecules.
    Type: Application
    Filed: November 3, 2006
    Publication date: July 16, 2009
    Applicant: Korea Institute of Science and Technology
    Inventors: Soo-Chang Song, Sun-Mi Lee, Chang-Won Kim
  • Publication number: 20090092031
    Abstract: Disclosed are an optical pickup module and a manufacturing method thereof. The manufacturing method of an optical pickup module includes: forming a wet-etching mask layer at an outer portion of an upper surface of a silicon substrate to be used as a sub mount; etching a middle portion of the silicon substrate by using the wet-etching mask layer thereby forming a cavity, forming an inclination surface at the etched portion, and then removing the wet-etching mask layer; forming an insulating layer on an entire upper surface of the to silicon substrate; forming an electrode layer on an upper surface of the insulating layer; forming adhesive layers at a part of an upper surface of the electrode layer; and arranging a light emitting device at an upper surface of one adhesive layer and arranging an MPD at an upper surface of another adhesive layer by a fixation thereby completing an optical pickup module.
    Type: Application
    Filed: December 8, 2008
    Publication date: April 9, 2009
    Inventors: Ki-Chang SONG, Geun-Ho KIM, Sun-Ho KIM
  • Publication number: 20090047348
    Abstract: A biodegradable and thermosensitive poly(organophosphazene) with a functional group, a preparation method thereof, and a use thereof for delivery of bioactive substances are provided.
    Type: Application
    Filed: May 17, 2008
    Publication date: February 19, 2009
    Applicant: Korea Institute of Science and Technology
    Inventors: Soo-Chang SONG, Mi-Ran PARK, Sun-Mi LEE
  • Publication number: 20090022683
    Abstract: The present invention relates to a biodegradable and thermosensitive poly(organophosphazene) with a functional group, a preparation method thereof, and a use thereof for delivery of bioactive substances. According to the present invention, poly(organophosphazene) is a phosphagen-based polymer showing biodegradability, thermosensitivity, and sol-gel phase transition depending on temperature change, whereby when administered into a living body with bioactive substances such as drugs, the poly(organophosphazene) forms a gel-phase at body temperature to be capable of controlled release of the bioactive substances. Further, the poly(organophosphazene) has functional groups to chemically bind with bioactive substances through an ionic bond, covalent bond, or coordinate covalent bond to be capable of a sustained release of the bioactive substances due to its good binding property. Therefore, the poly(organophosphazene) is useful as a delivery material for bioactive substances.
    Type: Application
    Filed: November 3, 2006
    Publication date: January 22, 2009
    Applicant: KIST
    Inventors: Soo-Chang Song, Sun-Mi Lee, Chang-Won Kim, Mi-Ran Park
  • Patent number: 7464357
    Abstract: An integrated circuit for locating failure process layers. The circuit has a substrate with a scan chain disposed therein, having scan cells connected to form a series chain. Each connection is formed according to a layout constraint of a minimum dimension provided by design rules for an assigned routing layer. Since the connection in the assigned routing layer is constrained to a minimum, the scan chain is vulnerable to variations in processes relevant to the assigned routing layer. The scan chain makes it easier to locate processes causing low yield rate of the scan chain.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: December 9, 2008
    Assignee: Faraday Technology Corp.
    Inventors: An-Ru Andrew Cheng, Chang-Song Lin, Tzu-Chun Liu, Huan-Yung Tseng
  • Publication number: 20080290820
    Abstract: A light emitting device comprises a light emitting element having a first electrode and a second electrode, and a semiconductor member having a cavity in a principal surface thereof, inside which the light emitting element is mounted, and electrically connected to the light emitting element, wherein the semiconductor member is constructed as a voltage regulating diode for stabilizing a voltage supplied from the exterior. As a result, the light emitting element can be protected from a static electricity or a surge voltage flowed therein from the exterior, the entire size of the system can be remarkably reduced so as to simplify a structure thereof, and heat generated from the system can be effectively discharged to the exterior. In addition, by providing a reflection portion in the cavity, light emitted from the light emitting element can be efficiently condensed.
    Type: Application
    Filed: June 30, 2008
    Publication date: November 27, 2008
    Inventors: Geun-Ho Kim, Ki-Chang Song
  • Publication number: 20080190493
    Abstract: Disclosed is the sensor module, including a housing having a connection path connected to a channel on which a fluid flows; a sensor disposed inside the housing so as to be communicated with the connection path, and measuring information about the fluid introduced from the connection path; and an overpressure protection means disposed at the connection path, and selectively blocking the connection path according to a pressure applied from the fluid so as to prevent the transfer of a pressure greater than a reference pressure to the sensor, the circulation system having the same, and the method for assembling the sensor module. It can prevent the transfer of an excessive pressure of the fluid to the sensor, thereby preventing the sensor from being damaged by the overpressure.
    Type: Application
    Filed: February 13, 2008
    Publication date: August 14, 2008
    Inventors: Chang-Hoon OH, Si-Hong Ahn, Ki-Chang Song
  • Patent number: 7411225
    Abstract: A light source apparatus and a fabrication method thereof can prevent light interference between light emitting devices adjacent to each other by forming a groove in a sub-mount and bonding a light emitting device to the groove, enhance heat radiating effect as well as luminous efficiency by collecting light emitted from the side of the light emitting device toward the front of the light source apparatus, reduce the process time and costs and increase reliability by directly connecting the sub-mount to the stem by the first electrode and the second electrode which pass through holes of the sub-mount, and extend a life span of the light emitting device because of the enhanced heat radiating effect.
    Type: Grant
    Filed: March 21, 2005
    Date of Patent: August 12, 2008
    Assignee: LG Electronics Inc.
    Inventors: Geun-Ho Kim, Ki-Chang Song, Sun-Ho Kim
  • Patent number: 7408203
    Abstract: A light emitting device comprises a light emitting element having a first electrode and a second electrode, and a semiconductor member having a cavity in a principal surface thereof, inside which the light emitting element is mounted, and electrically connected to the light emitting element, wherein the semiconductor member is constructed as a voltage regulating diode for stabilizing a voltage supplied from the exterior. As a result, the light emitting element can be protected from a static electricity or a surge voltage flowed therein from the exterior, the entire size of the system can be remarkably reduced so as to simplify a structure thereof, and heat generated from the system can be effectively discharged to the exterior. In addition, by providing a reflection portion in the cavity, light emitted from the light emitting element can be efficiently condensed.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: August 5, 2008
    Assignee: LG Electronics Inc.
    Inventors: Geun-Ho Kim, Ki-Chang Song