Patents by Inventor Kyu Hwang

Kyu Hwang 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).

  • METHOD FOR FABRICATING TRANSFER PRINTING SUBSTRATE USING CONCAVE-CONVEX STRUCTURE, TRANSFER PRINTING SUBSTRATE FABRICATED THEREBY AND APPLICATION THEREOF
    Publication number: 20150174940
    Abstract: The present disclosure provides a method for fabricating a substrate for transfer printing using a concave-convex structure and a substrate for transfer printing fabricated thereby. The method includes preparing a handling substrate having a concave-convex structure formed thereon; forming a sacrificial layer along the concave-convex structure on the handling substrate; coating a polymer on the handling substrate having the sacrificial layer formed thereon to form a polymer substrate having bumps filling a concave portion of the concave-convex structure; and removing the sacrificial layer from the handling to substrate. The substrate for transfer printing includes a handling substrate having a concave-convex structure formed thereon; and a polymer substrate placed on the concave-convex structure and having bumps filling a concave portion of the concave-convex structure of the handling substrate.
    Type: Application
    Filed: March 10, 2015
    Publication date: June 25, 2015
    Inventors: Heung Cho KO, Seok Ho KIM, Jongwon YOON, Young Kyu HWANG, Su Ok YUN, Hun Soo JANG, Seong-Ju PARK, Hyun-A CHO, Byeong-Il NOH, Jaeyi CHUN
  • Array substrate for liquid crystal display having gate line, gate electrode and data pattern in at least two trenches and method of fabricating the same
    Patent number: 9064752
    Abstract: An array substrate includes: a trench having a depth from a surface of a substrate; a gate line, a gate electrode and a data pattern filling the respective trenches, wherein the data pattern is between the adjacent gate lines; a gate insulating layer on the gate line, the gate electrode and the data pattern, substantially flat over the substrate, and including contact holes that expose both ends of the data pattern, respectively; a data connection portion on the gate insulating layer and contacting the adjacent data patterns through the contact holes; a source electrode extending from the data connection portion, and a drain electrode spaced apart from the source electrode; a passivation layer on the source and drain electrodes and including a drain contact hole exposing the drain electrode; and a pixel electrode on the passivation layer and contacting the drain electrode through the drain contact hole.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: June 23, 2015
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Tae-Hyoung Moon, Tae-Joon Song, Kyu-Hwang Lee, Kyung-Ha Lee
  • Apparatus for treating air by using porous organic-inorganic hybrid materials as an absorbent
    Patent number: 9038409
    Abstract: The present disclosure provides an apparatus for treating air by using porous organic-inorganic hybrid materials as an absorbent, which comprises an inlet passage for receiving air from outside; a dehumidifying part comprising porous organic-inorganic hybrid materials as an adsorbent for removing moisture from the air receiving through the inlet passage; a regenerating unit for regenerating the adsorbent of the dehumidifying part; and an outlet passage for discharging the dehumidified air to outside. Said apparatus preferably comprises two dehumidifying parts of two-bed switching type and two switch valves, wherein said two dehumidifying parts are alternatively operated for dehumidification and for regeneration by switching said switch valves to convert direction of air flow.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: May 26, 2015
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Young Kyu Hwang, Jong-San Chang, Dong Won Hwang, Ji Sun Lee
  • Recovery method of highly pure lactic acid and alkyl lactate
    Patent number: 9012685
    Abstract: A method for recovery of highly pure alkyl lactate and lactic acid is provided, which includes a step 1 for producing source liquid comprising lactic acid or ammonium lactate; a step 2 for dehydrating the source liquid product of step 1; a step 3 for producing liquid mixture by sequentially adding and stirring alcohol and acid solution to the dehydrated source liquid; a step 4 for separating and removing ammonium salt precipitation from the liquid mixture of step 3; a step 5 for producing alkyl lactate from ammonium salt-free liquid mixture by esterification reaction; and a step 6 for separating alcohol and alkyl lactate by distillation from the mixture of step 5.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: April 21, 2015
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Dong Won Hwang, Jong-San Chang, Young Kyu Hwang, U-Hwang Lee, HyoJin Gwak
  • Method for fabricating transfer printing substrate using concave-convex structure, transfer printing substrate fabricated thereby and application thereof
    Patent number: 9005709
    Abstract: A method for fabricating a substrate for transfer printing using a concave-convex structure and a substrate for transfer printing fabricated thereby. The method includes preparing a handling substrate having a concave-convex structure formed thereon; forming a sacrificial layer along the concave-convex structure on the handling substrate; coating a polymer on the handling substrate having the sacrificial layer formed thereon to form a polymer substrate having bumps filling a concave portion of the concave-convex structure; and removing the sacrificial layer from the handling substrate. The substrate includes a handling substrate having a concave-convex structure formed thereon; and a polymer substrate placed on the concave-convex structure and having bumps filling a concave portion of the concave-convex structure of the handling substrate.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: April 14, 2015
    Assignee: Gwangju Institute of Science and Technology
    Inventors: Heung Cho Ko, Seok Ho Kim, Jongwon Yoon, Young Kyu Hwang, Su Ok Yun, Hun Soo Jang, Seong-Ju Park, Hyun-A Cho, Byeong-Il Noh, Jaeyi Chun
  • Adsorbent for water adsorption and desorption
    Patent number: 8980128
    Abstract: The present invention relates to methods for absorbing and/or desorbing water by contacting water with hybrid inorganic-organic material having high surface area, and pores with the size of molecules or nanometers. More specifically, the water adsorbent has facile adsorption-desorption even below 100° C., having high adsorption capacity, and having high desorption capacity when it is heated up to the temperature below 100° C. The adsorbent of the present invention can be applied to a humidifier, dehumidifier, cooler and heater. The present invention also relates to a technology to control humidity using the adsorbent.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: March 17, 2015
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Jong-San Chang, Sung-Hwa Jhung, Young-Kyu Hwang
  • Reducible porous crystalline hybrid solid for the separation of mixtures of molecules having different degrees and/or a different number of unsaturations
    Patent number: 8926736
    Abstract: The present invention relates to reducible porous crystalline solids, constituted of a metal-organic framework (MOF), for the separation of mixtures of molecules having different unsaturation degrees and/or a different number of unsaturations with a selectivity that can be adjusted by controlling the reduction of the MOF. The MOF solids of the present invention, after reduction, have a strong affinity for molecules containing at least one unsaturation. They can be used in various separation processes, especially those relating to hydrocarbons.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: January 6, 2015
    Assignees: Centre National de la Recherche Scientifique -CNRS-, Universite de Caen-Basse Normandie, Universite de Versailles—Saint Quentin en Yvelines, Korea Research Institute of Chemical & Technology (KRICT)
    Inventors: Christian Serre, Alexandre Vimont, Philip Llewellyn, Jong-San Chang, Patricia Horcajada-Cortes, Gérard Ferey, Marco Daturi, Young-Kyu Hwang
  • ARRAY SUBSTRATE FOR LIQUID CRYSTAL DISPLAY AND METHOD OF FABRICATING THE SAME
    Publication number: 20150001543
    Abstract: An array substrate includes: a trench having a depth from a surface of a substrate; a gate line, a gate electrode and a data pattern filling the respective trenches, wherein the data pattern is between the adjacent gate lines; a gate insulating layer on the gate line, the gate electrode and the data pattern, substantially flat over the substrate, and including contact holes that expose both ends of the data pattern, respectively; a data connection portion on the gate insulating layer and contacting the adjacent data patterns through the contact holes; a source electrode extending from the data connection portion, and a drain electrode spaced apart from the source electrode; a passivation layer on the source and drain electrodes and including a drain contact hole exposing the drain electrode; and a pixel electrode on the passivation layer and contacting the drain electrode through the drain contact hole.
    Type: Application
    Filed: December 4, 2013
    Publication date: January 1, 2015
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Tae-Hyoung MOON, Tae-Joon SONG, Kyu-Hwang LEE, Kyung-Ha LEE
  • TRANSFER PRINTING SUBSTRATE, MANUFACTURING METHOD THEREOF, AND METHOD OF TRANSFER PRINTING
    Publication number: 20140345794
    Abstract: Disclosed herein is a transfer printing technology. A transfer printing substrate includes a plurality of pillar structures and a sacrificial layer applied thereon. In situ alignment of a transfer layer is performed by the pillar structures and a structural confinement by a concave structure formed on a bottom surface of the transfer layer corresponding to the pillar structures, or a chemical bond of the pillar structure and the transfer layer. In the in situ alignment by the structural confinement, the remaining sacrificial layer after being removed may serve as an adhesive component. The transfer process is performed by a separation of the bond by the sacrificial layer, a cutting of the pillar structures in the chemic bonding state of the pillar structures and the transfer layer, or a separation of the bond between the pillar structures and the handling substrate.
    Type: Application
    Filed: December 30, 2013
    Publication date: November 27, 2014
    Applicant: GWANGJU INSTITUTE OF SICENCE AND TECHNOLOGY
    Inventors: Heung Cho KO, Su Ok YUN, Jeong Pil PARK, Suk Ho KIM, Young Kyu HWANG, Yujun HYUN, Hun Soo JANG, Yun Kyung JEONG
  • Normally-off high electron mobility transistor
    Patent number: 8890212
    Abstract: According to example embodiments, a normally-off high electron mobility transistor (HEMT) includes: a channel layer having a first nitride semiconductor, a channel supply layer on the channel layer, a source electrode and a drain electrode at sides of the channel supply layer, a depletion-forming layer on the channel supply layer, a gate insulating layer on the depletion-forming layer, and a gate electrode on the gate insulation layer. The channel supply layer includes a second nitride semiconductor and is configured to induce a two-dimensional electron gas (2DEG) in the channel layer. The depletion-forming layer is configured has at least two thicknesses and is configured to form a depletion region in at least a partial region of the 2DEG. The gate electrode contacts the depletion-forming layer.
    Type: Grant
    Filed: May 1, 2013
    Date of Patent: November 18, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-chul Jeon, Young-hwan Park, Jae-joon Oh, Kyoung-yeon Kim, Joon-yong Kim, Ki-yeol Park, Jai-kwang Shin, Sun-kyu Hwang
  • Array substrate for display device including signal lines with reduced resistance
    Patent number: 8890167
    Abstract: An array substrate for a display device and manufacturing method thereof is disclosed. The device comprises: a substrate; a gate line formed on the substrate along a first direction; a data line formed over the substrate along a second direction, wherein the data line and the gate line cross each other to define a pixel region; a thin film transistor formed in the pixel region, and having a gate electrode connected to the gate line, a source electrode connected to the data line, and a drain electrode; a pixel electrode formed in the pixel region and connected to the drain electrode; a first auxiliary gate pattern formed over the gate line and contacting the gate line; and a first auxiliary data pattern formed over the data line and contacting the data line.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: November 18, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Seung-Hee Nam, Soon-Sung Yoo, Tae-Hyoung Moon, Tae-Joon Song, Kyu-Hwang Lee
  • Mirrorless Driving of Automotive Vehicle Using Digital Image Sensors and Touchscreen
    Publication number: 20140327775
    Abstract: Automotive mirrors may be replaced by a multi-lens-equipped touchscreen to enable mirrorless driving that may help open a new avenue for identifying energy-saving and environment-friendly solutions to enhance driving safety by harnessing vehicle traffic to incentivize a mixed reality. The mirrorless driving may eventually encompass not just vehicular black boxes and rearview backup cameras but also ADAS (Advanced Driver Assistance System).
    Type: Application
    Filed: July 15, 2014
    Publication date: November 6, 2014
    Inventor: Kyu Hwang Cho
  • HIGH ELECTRON MOBILITY TRANSISTOR AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20140327043
    Abstract: Provided are a high electron mobility transistor (HEMT) and a method of manufacturing the HEMT. The HEMT includes: a channel layer comprising a first semiconductor material; a channel supply layer comprising a second semiconductor material and generating two-dimensional electron gas (2DEG) in the channel layer; a source electrode and a drain electrode separated from each other in the channel supply layer; at least one depletion forming unit that is formed on the channel supply layer and forms a depletion region in the 2DEG; at least one gate electrode that is formed on the at least one depletion forming unit; at least one bridge that connects the at least one depletion forming unit and the source electrode; and a contact portion that extends from the at least one bridge under the source electrode.
    Type: Application
    Filed: November 20, 2013
    Publication date: November 6, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jong-seob KIM, In-jun HWANG, Jai-kwang SHIN, Jae-joon OH, Woo-chul JEON, Hyuk-soon CHOI, Sun-kyu HWANG
  • High electron mobility transistor and method of manufacturing the same
    Patent number: 8860089
    Abstract: According to example embodiments, a higher electron mobility transistor (HEMT) may include a first channel layer, a second channel layer on the first channel layer, a channel supply on the second channel layer, a drain electrode spaced apart from the first channel layer, a source electrode contacting the first channel layer and contacting at least one of the second channel layer and the channel supply layer, and a gate electrode unit between the source electrode and the drain electrode. The gate electrode unit may have a normally-off structure. The first and second channel layer form a PN junction with each other. The drain electrode contacts at least one of the second channel layer and the channel supply layer.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: October 14, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ki-yeol Park, Woo-chul Jeon, Young-hwan Park, Jai-kwang Shin, Jong-bong Ha, Sun-kyu Hwang
  • APPARATUS AND METHOD FOR DRYING SUBSTRATES
    Publication number: 20140298669
    Abstract: A method for drying substrates using isopropyl alcohol (IPA) includes: a pre-stage in which heated fluid is injected to a bottom surface of a substrate to raise a temperature of the substrate simultaneously to injection of an organic solvent to a top surface of the substrate and injection of a dry gas to the top surface thereof to improve a vaporization power of the organic solvent; and a final stage in which the injection of the heated fluid is stopped and the organic solvent and the dry gas are injected to the top surface of the substrate.
    Type: Application
    Filed: May 2, 2014
    Publication date: October 9, 2014
    Applicant: SEMES CO., LTD.
    Inventors: Young-Ju Jeong, Bok-Kyu Lee, Sun-Kyu Hwang, Jeong-Yong Bae, Soo-Bin Yong
  • COMPLEX COMPRISING CRYSTALLINE HYBRID NANOPOROUS MATERIAL POWDER
    Publication number: 20140287235
    Abstract: The present invention relates to a complex and a method for manufacturing same, the complex comprising: at least one crystalline hybrid nanoporous material powder, in which a metal ion, or a metal ion cluster to which oxygen is bound, and an organic ligand, or the organic ligand and a negative ion ligand are in a coordinate covalent bond; and at least one organic polymer additive, or at least one organic polymer additive and an inorganic additive, wherein the shape of the complex is spherical or pseudo-spherical, the size of the complex is 0.1 to 100 mm, a total volume of pores is 5 or more volume % based on the sum of a total volume of nanoporous material having a size of at most 10 nm and a total volume of pores having a size of at least 0.1 ?m, and wherein a non-surface value per weight (m2/g) of the complex as at least 83% of a non-surface value per weight (m2/g) of the nanoporous material powder.
    Type: Application
    Filed: August 14, 2012
    Publication date: September 25, 2014
    Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
    Inventors: Jong-San Chang, U-Hwang Lee, Young Kyu Hwang, Dong Won Hwang, You-Kyong Seo, Ji Sun Lee, Ji Woong Yoon, Kyu Eun Shim
  • Device for cutting of glass sheet
    Patent number: 8821211
    Abstract: Disclosed herein is a device for cutting a glass sheet, continuously supplied after a melting and solidification process, into quadrangular glass substrates. The glass sheet cutting device includes two or more cutters for cutting a glass sheet into quadrangular glass substrates, a defect inspector for scanning the glass sheet to three-dimensionally check defect positions in a length direction, a width direction and a thickness direction of the glass sheet, a position adjuster for moving at least one of the cutters to a portion of the glass sheet at which few defects are distributed, and a controller for informing the position adjuster of positions of the cutters based on the scanned results received from the defect inspector.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: September 2, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Ho Kyung Lee, Kyu Hwang Lee, Soon Ki Heo
  • METHOD AND APPARATUS FOR CONTROLLING A GATE VOLTAGE IN HIGH ELECTRON MOBILITY TRANSISTOR
    Publication number: 20140240026
    Abstract: According to example embodiments, a method for controlling a gate voltage applied to a gate electrode of a high electron mobility transistor (HEMT) may include measuring a voltage between a drain electrode and a source electrode of the HEMT, and adjusting a level of the gate voltage applied to the gate electrode of the HEMT according to the measured voltage. The level of the gate electrode may be adjusted if the voltage between the drain electrode and the source electrode is different than a set value.
    Type: Application
    Filed: December 16, 2013
    Publication date: August 28, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sun-kyu HWANG, Woo-chul JEON, Joon-yong KIM, Ki-yeol PARK, Young-hwan PARK, Jai-kwang SHIN, Jae-joon OH, Jong-bong HA
  • Apparatus and method for drying substrates
    Patent number: 8793898
    Abstract: A method for drying substrates using isopropyl alcohol (IPA) includes: a pre-stage in which heated fluid is injected to a bottom surface of a substrate to raise a temperature of the substrate simultaneously to injection of an organic solvent to a top surface of the substrate and injection of a dry gas to the top surface thereof to improve a vaporization power of the organic solvent; and a final stage in which the injection of the heated fluid is stopped and the organic solvent and the dry gas are injected to the top surface of the substrate.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: August 5, 2014
    Assignee: Semes Co., Ltd.
    Inventors: Young-Ju Jeong, Bok-Kyu Lee, Sun-Kyu Hwang, Jeong-Yong Bae, Soo-Bin Yong
  • Array substrate, manufacturing method of the same, and fabricating method of display device including the array substrate
    Patent number: 8791459
    Abstract: An array substrate for a display device includes an insulation substrate, a gate line formed on the insulation substrate, a data line crossing the gate line to define a pixel area, a thin film transistor including a gate electrode connected to the gate line, a source electrode connected to the data line, and a drain electrode, a passivation layer covering the gate line, the data line and the thin film transistor and including a drain contact hole to expose the drain electrode, and a pixel electrode formed on the pixel area and being connected to the drain contact hole through the drain contact hole. Each of the data line, the source electrode and the drain electrode includes a lower layer having copper and an upper layer covering upper and side surfaces of the lower layer, and the upper layer is thinner than the lower layer.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: July 29, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Tae-Hyoung Moon, Kyu-Hwang Lee, Kyung-Ha Lee