Patents by Inventor Hee-Young Kwack
Hee-Young Kwack 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).
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Publication number: 20110250532Abstract: A method of lifting off includes forming a first material layer on a substrate; forming a photoresist pattern including first and second holes and on the first material layer; patterning the first material layer using the photoresist pattern as a patterning mask to form a material pattern having first and second grooves within the material pattern, the first and second grooves corresponding to the first and second holes, respectively; forming a second material layer on an entire surface of the substrate including the photoresist pattern and the first and second grooves; and removing the photoresist pattern and the second material layer on the photoresist pattern at the same time, wherein a portion of the material pattern between the first and second grooves and portions of the material pattern at sides of the first and second grooves constitute a line as a whole.Type: ApplicationFiled: June 21, 2011Publication date: October 13, 2011Inventors: Hee-Young Kwack, Hyun-Seok Hong, Joo-Soo Lim, Hong-Sik Kim
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Patent number: 8031312Abstract: An array substrate for a liquid crystal display device includes a substrate, a gate line on the substrate, a thin film transistor including a gate electrode of the gate line, a gate insulating layer over the gate electrode, an active layer on the gate insulating layer and ohmic contact layers on the active layer, and source and drain electrodes over the ohmic contact layers, a pixel electrode electrically connected to the drain electrode, a data line electrically connected to the source electrode and crossing the gate line, a common electrode spaced apart from the pixel electrode, and a passivation layer directly between the pixel electrode and the common electrode and directly between the source and drain electrodes.Type: GrantFiled: May 30, 2007Date of Patent: October 4, 2011Assignee: LG Display Co., Ltd.Inventors: Joo-Soo Lim, Hyo-Uk Kim, Hee-Young Kwack, Hyun-Seok Hong, Byung-Chul Ahn, Byoung-Ho Lim
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Patent number: 8008139Abstract: A simplified method of manufacturing a thin film transistor array substrate is disclosed.Type: GrantFiled: August 20, 2009Date of Patent: August 30, 2011Assignee: LG Display Co., Ltd.Inventors: Joo Soo Lim, Hee Young Kwack
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Patent number: 7988871Abstract: A method of lifting off includes forming a first material layer on a substrate; forming a photoresist pattern including first and second holes and on the first material layer; patterning the first material layer using the photoresist pattern as a patterning mask to form a material pattern having first and second grooves within the material pattern, the first and second grooves corresponding to the first and second holes, respectively; forming a second material layer on an entire surface of the substrate including the photoresist pattern and the first and second grooves; and removing the photoresist pattern and the second material layer on the photoresist pattern at the same time, wherein a portion of the material pattern between the first and second grooves and portions of the material pattern at sides of the first and second grooves constitute a line as a whole.Type: GrantFiled: July 18, 2008Date of Patent: August 2, 2011Assignee: LG Display Co., Ltd.Inventors: Hee-Young Kwack, Hyun-Seok Hong, Joo-Soo Lim, Hong-Sik Kim
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Publication number: 20110156040Abstract: A thin film transistor array substrate including a substrate, a gate line intersecting a data line to define a pixel region on the substrate, a switching element disposed at an intersection of the gate line and the data line, a plurality of pixel electrodes and a plurality of first common electrodes alternately arranged in the pixel region, a second common electrode overlapping the data line and interposed between a gate insulation film and a protective film, a first storage electrode on the substrate, a second storage electrode overlapping the first storage electrode, and an organic insulation film on the switching element, the second storage electrode, the data line, a gate pad, and a data pad, wherein the second common electrode covers the data line, the protective film, the organic insulation film, and the gate insulation film, and has inclined surfaces connected to the surface of the substrate.Type: ApplicationFiled: December 13, 2010Publication date: June 30, 2011Inventors: Hee Young KWACK, Heung Lyul CHO, Jeong Yun LEE, Jung Ho SON
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Patent number: 7916229Abstract: A liquid crystal display device includes a gate line on a substrate; a data line crossing the gate line with a gate insulating film interposed between the gate line and the data line to define a pixel region; a thin film transistor at the crossing of the gate line and the data line; a pixel electrode connected to the thin film transistor; a common electrode forming a horizontal electric field with the pixel electrode in the pixel region; a gate pad connected to the gate line; and a data pad connected to the data line, wherein the gate pad and the data pad includes a lower pad in the same layer as the gate line and made of the same material as the gate line, a lower contact hole through the gate insulating film to expose the lower pad, an upper pad in the same layer as the data line, made of the same material as the data line, and connected to the lower pad through the lower contact hole, and an upper contact hole through a passivation film protecting the thin film transistor to expose the upper pad, and a semType: GrantFiled: December 23, 2008Date of Patent: March 29, 2011Assignee: LG Display Co., Ltd.Inventors: Woo Sup Shin, Joo Soo Lim, Heung Lyul Cho, Hee Young Kwack
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Patent number: 7910928Abstract: A four-mask process thin film transistor (TFT) array substrate and a method for fabricating the same is disclosed, which prevents a semiconductor tail from being formed. An open area is thus obtained and wavy noise is prevented from occurring.Type: GrantFiled: August 2, 2010Date of Patent: March 22, 2011Assignee: LG Display Co., Ltd.Inventor: Hee Young Kwack
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Publication number: 20100328567Abstract: A method of fabricating an LCD device includes forming a gate line, a gate electrode, a gate pad electrode at an end of the gate line, and a common line on a substrate; forming a gate insulating layer on the gate electrode; forming an active layer on the gate insulating layer; forming an etch stopper on the active layer; forming first and second ohmic contact layers spaced apart from each other on the active layer and an impurity-doped amorphous silicon pattern contacting the gate insulating layer therebelow, outer sides of the first and second ohmic contact layers being outside the active layer; forming a data line crossing the gate line to define a pixel region, a data pad electrode at an end of the data line, and source and drain electrodes on the first and second ohmic contact layers, respectively; forming a pixel electrode and a common electrode in the pixel region to induce an in-plane electric field; and forming a gate pad terminal electrode on the gate pad electrode.Type: ApplicationFiled: September 13, 2010Publication date: December 30, 2010Inventor: Hee-Young Kwack
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Patent number: 7855033Abstract: A photo-mask used for fabricating a photoresist pattern in process of fabricating an array substrate for a liquid crystal display device comprises a transmissive area having a first transmittance; a blocking area having a second transmittance; a first half-transmissive area including at least one coating layer and having a third transmittance; a second half-transmissive area including a plurality of bars and having a fourth transmittance, the bars having spaces therebetween, wherein the third and fourth transmittances are less than the first transmittance and greater than the second transmittance, respectively, and the third transmittance is greater than the fourth transmittance.Type: GrantFiled: December 15, 2006Date of Patent: December 21, 2010Assignee: LG Display Co., Ltd.Inventor: Hee-Young Kwack
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Publication number: 20100314623Abstract: A four-mask process thin film transistor (TFT) array substrate and a method for fabricating the same is disclosed, which prevents a semiconductor tail from being formed. An open area is thus obtained and wavy noise is prevented from occurring.Type: ApplicationFiled: August 2, 2010Publication date: December 16, 2010Inventor: Hee Young KWACK
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Patent number: 7817231Abstract: A liquid crystal display device is provided that comprises a gate line; a first insulating film on the gate line; a data line crossing the gate line to define a pixel region, the pixel region having a transmissive area and a reflective area; a thin film transistor connected to the gate line and the data line; a pixel electrode formed in the pixel region; a second insulating film on the thin film transistor; a storage capacitor including a storage upper electrode overlapping the gate line; a transmission hole exposing at least a portion of the pixel electrode, and a reflective electrode formed in the reflective area of the pixel region, the reflective electrode connecting the pixel electrode with thin film transistor and the storage upper electrode, wherein the gate line and the pixel electrode include a first transparent conductive layer.Type: GrantFiled: July 28, 2009Date of Patent: October 19, 2010Assignee: LG Display Co., Ltd.Inventors: Byung Chul Ahn, Tae Yong Jung, Ji No Lee, Hee Young Kwack
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Patent number: 7807486Abstract: A method of fabricating an LCD device includes forming a gate line, a gate electrode, a gate pad electrode at an end of the gate line, and a common line on a substrate; forming a gate insulating layer on the gate electrode; forming an active layer on the gate insulating layer; forming an etch stopper on the active layer; forming first and second ohmic contact layers spaced apart from each other on the active layer and an impurity-doped amorphous silicon pattern contacting the gate insulating layer therebelow, outer sides of the first and second ohmic contact layers being outside the active layer; forming a data line crossing the gate line to define a pixel region, a data pad electrode at an end of the data line, and source and drain electrodes on the first and second ohmic contact layers, respectively; forming a pixel electrode and a common electrode in the pixel region to induce an in-plane electric field; and forming a gate pad terminal electrode on the gate pad electrode.Type: GrantFiled: September 29, 2008Date of Patent: October 5, 2010Assignee: LG Display Co., Ltd.Inventor: Hee-Young Kwack
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Patent number: 7785940Abstract: A four-mask process thin film transistor (TFT) array substrate and a method for fabricating the same is disclosed, which prevents a semiconductor tail from being formed. An open area is thus obtained and wavy noise is prevented from occurring.Type: GrantFiled: December 22, 2006Date of Patent: August 31, 2010Assignee: LG Display Co., Ltd.Inventor: Hee Young Kwack
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Patent number: 7760317Abstract: A TFT array substrate is fabricated in a reduced number of processes. The TFT array substrate includes gate and data pads with enlarged contact areas to facilitate contact with an inspecting pin of an inspection device. An LCD incorporating the TFT array substrate is inspected by contacting the inspecting pin to the gate and data pads. The TFT array substrate includes first, second, and third conductive pattern groups. The first conductive pattern group includes a gate electrode, a gate line, and a lower gate pad electrode. The second conductive pattern group includes source and drain electrodes, a data line, and a lower data pad electrode. The third conductive pattern group includes a pixel electrode, and upper gate and data pad electrodes. A semiconductor pattern is along and beneath the second conductive pattern group. Gate insulating and protective film patterns are at areas not occupied by the third conductive pattern group.Type: GrantFiled: October 13, 2004Date of Patent: July 20, 2010Assignee: LG Display Co., Ltd.Inventors: Byoung Ho Lim, Soon Sung Yoo, Chang Deok Lee, Seung Hee Nam, Jae Young Oh, Hong Sik Kim, Hee Young Kwack
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Publication number: 20100047974Abstract: A simplified method of manufacturing a thin film transistor array substrate is disclosed.Type: ApplicationFiled: August 20, 2009Publication date: February 25, 2010Inventors: Joo Soo Lim, Hee Young Kwack
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Publication number: 20090290084Abstract: A liquid crystal display device is provided that comprises a gate line; a first insulating film on the gate line; a data line crossing the gate line to define a pixel region, the pixel region having a transmissive area and a reflective area; a thin film transistor connected to the gate line and the data line; a pixel electrode formed in the pixel region; a second insulating film on the thin film transistor; a storage capacitor including a storage upper electrode overlapping the gate line; a transmission hole exposing at least a portion of the pixel electrode, and a reflective electrode formed in the reflective area of the pixel region, the reflective electrode connecting the pixel electrode with thin film transistor and the storage upper electrode, wherein the gate line and the pixel electrode include a first transparent conductive layer.Type: ApplicationFiled: July 28, 2009Publication date: November 26, 2009Inventors: Byung Chul Ahn, Tae Yong Jung, Ji No Lee, Hee Young Kwack
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Publication number: 20090284677Abstract: A liquid crystal display device includes a gate line on a substrate; a data line crossing the gate line with a gate insulating film interposed between the gate line and the data line to define a pixel region; a thin film transistor at the crossing of the gate line and the data line; a pixel electrode connected to the thin film transistor; a common electrode forming a horizontal electric field with the pixel electrode in the pixel region; a gate pad connected to the gate line; and a data pad connected to the data line, wherein the gate pad and the data pad includes a lower pad in the same layer as the gate line and made of the same material as the gate line, a lower contact hole through the gate insulating film to expose the lower pad, an upper pad in the same layer as the data line, made of the same material as the data line, and connected to the lower pad through the lower contact hole, and an upper contact hole through a passivation film protecting the thin film transistor to expose the upper pad, and a semType: ApplicationFiled: December 23, 2008Publication date: November 19, 2009Applicant: LG DISPLAY CO., LTD.Inventors: Woo Sup Shin, Joo Soo Lim, Heung Lyul Cho, Hee Young Kwack
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Patent number: 7583337Abstract: A liquid crystal display device is provided that comprises a gate line; a first insulating film on the gate line; a data line crossing the gate line to define a pixel region, the pixel region having a transmissive area and a reflective area; a thin film transistor connected to the gate line and the data line; a pixel electrode formed in the pixel region; a second insulating film on the thin film transistor; a storage capacitor including a storage upper electrode overlapping the gate line; a transmission hole exposing at least a portion of the pixel electrode, and a reflective electrode formed in the reflective area of the pixel region, the reflective electrode connecting the pixel electrode with thin film transistor and the storage upper electrode, wherein the gate line and the pixel electrode include a first transparent conductive layer.Type: GrantFiled: June 2, 2005Date of Patent: September 1, 2009Assignee: LG Display Co., Ltd.Inventors: Byung Chul Ahn, Tae Yong Jung, Ji No Lee, Hee Young Kwack
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Publication number: 20090101908Abstract: A method of fabricating an LCD device includes forming a gate line, a gate electrode, a gate pad electrode at an end of the gate line, and a common line on a substrate; forming a gate insulating layer on the gate electrode; forming an active layer on the gate insulating layer; forming an etch stopper on the active layer; forming first and second ohmic contact layers spaced apart from each other on the active layer and an impurity-doped amorphous silicon pattern contacting the gate insulating layer therebelow, outer sides of the first and second ohmic contact layers being outside the active layer; forming a data line crossing the gate line to define a pixel region, a data pad electrode at an end of the data line, and source and drain electrodes on the first and second ohmic contact layers, respectively; forming a pixel electrode and a common electrode in the pixel region to induce an in-plane electric field; and forming a gate pad terminal electrode on the gate pad electrode.Type: ApplicationFiled: September 29, 2008Publication date: April 23, 2009Inventor: Hee-Young Kwack
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Patent number: 7518666Abstract: A TFT substrate having a storage capacitor with an increased capacitance and aperture ratio, and a simplified method of fabricating the same, includes gate and data lines crossing each other to define pixel areas; a gate insulating film between the gate and data lines; TFTs connected to the gate and data lines; a semiconductor pattern defining a channel of the TFTs and overlapped by the data lines; a passivation film covering the data lines and the TFTs; and at least one pixel electrode connected to a TFT and provided within a pixel hole that is arranged within a pixel area. The pixel hole is formed through the passivation film and partially through the gate insulating film. Further, a storage capacitor includes a portion of the pixel electrode that overlaps with an underlying gate line with a portion of the gate insulating film that defines the pixel hole.Type: GrantFiled: June 3, 2005Date of Patent: April 14, 2009Assignee: LG Display Co., Ltd.Inventors: Tae Yong Jung, Ji No Lee, Hee Young Kwack