Patents by Inventor Kiyohiro Kawasaki

Kiyohiro Kawasaki 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: 8681307
    Abstract: According to the insulated gate transistor, a gate electrode (11A) is provided on a main surface of a glass substrate (2); a first part of an insulating layer (gate insulating layer (30) and transparent inorganic insulating layer (60)) is thicker than a second part of the insulating layer (gate insulating layer (30)), the first part being between (i) the gate electrode (11A) and (ii) a source electrode (12) and a drain electrode (21) of the insulated gate transistor, and the second part being between (i) the gate electrode (11A) and (ii) a channel section (31A) of the insulated gate transistor. This makes it possible to reduce parasitic capacitor without deteriorating characteristics of the transistor.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: March 25, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kiyohiro Kawasaki
  • Patent number: 8654299
    Abstract: Provided is an active matrix substrate manufacturing method, including the steps of: selectively forming a laminated structure pattern, by forming the laminated structure on a glass substrate (2), by forming a first photosensitive resin pattern (PR) on the laminated structure, and by selectively forming the laminated structure pattern using the first photosensitive resin pattern (PR), the laminated structure including a metal layer (a scanning signal line (11) material), a gate insulative layer (30), and a semiconductor layer (31, 33) (transistor material); fluorinating a surface of the first photosensitive resin pattern (PR) by dry-etching with fluorine gas; applying a coating-type transparent insulative resin (60) onto the glass substrate (2) to fill a space in the laminated structure pattern; and removing the fluorinated first photosensitive resin pattern (PR).
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: February 18, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kiyohiro Kawasaki
  • Publication number: 20130235318
    Abstract: Provided is an active matrix substrate manufacturing method, including the steps of: selectively forming a laminated structure pattern, by forming the laminated structure on a glass substrate (2), by forming a first photosensitive resin pattern (PR) on the laminated structure, and by selectively forming the laminated structure pattern using the first photosensitive resin pattern (PR), the laminated structure including a metal layer (a scanning signal line (11) material), a gate insulative layer (30), and a semiconductor layer (31, 33) (transistor material); fluorinating a surface of the first photosensitive resin pattern (PR) by dry-etching with fluorine gas; applying a coating-type transparent insulative resin (60) onto the glass substrate (2) to fill a space in the laminated structure pattern; and removing the fluorinated first photosensitive resin pattern (PR).
    Type: Application
    Filed: April 25, 2013
    Publication date: September 12, 2013
    Applicant: Sharp Kabushiki Kaisha
    Inventor: Kiyohiro KAWASAKI
  • Patent number: 8481351
    Abstract: Provided is an active matrix substrate manufacturing method, including the steps of: selectively forming a laminated structure pattern, by forming the laminated structure on a glass substrate (2), by forming a first photosensitive resin pattern (PR) on the laminated structure, and by selectively forming the laminated structure pattern using the first photosensitive resin pattern (PR), the laminated structure including a metal layer (a scanning signal line (11) material), a gate insulative layer (30), and a semiconductor layer (31, 33) (transistor material); fluorinating a surface of the first photosensitive resin pattern (PR) by dry-etching with fluorine gas; applying a coating-type transparent insulative resin (60) onto the glass substrate (2) to fill a space in the laminated structure pattern; and removing the fluorinated first photosensitive resin pattern (PR).
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: July 9, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kiyohiro Kawasaki
  • Patent number: 8334939
    Abstract: A four-mask process and a three-mask process proposal are constructed for a TN-type liquid crystal display device and an IPS-type liquid crystal device in which the formation of a passivation insulating layer is not required by streamlining the formation of a scan line and a pseudo-pixel element, both comprising a laminate made of a transparent conductive layer and a metal layer, at the same time and the formation of the transparent conductive pixel electrode by removing the metal layer on the pseudo-pixel electrode at the time of the formation of the opening in the gate insulating layer, by streamlining the treatment of the formation process of the contact and the formation process of the protective insulating layer using one photomask due to the introduction of half-tone exposure technology, and the formation of source-drain wires for etch-stop type insulating gate-type transistor using a photosensitive organic insulating layer and leaving the photosensitive organic insulating layer unchanged on source-drai
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: December 18, 2012
    Assignee: Au Optronics Corporation
    Inventor: Kiyohiro Kawasaki
  • Publication number: 20110250713
    Abstract: Provided is an active matrix substrate manufacturing method, including the steps of: selectively forming a laminated structure pattern, by forming the laminated structure on a glass substrate (2), by forming a first photosensitive resin pattern (PR) on the laminated structure, and by selectively forming the laminated structure pattern using the first photosensitive resin pattern (PR), the laminated structure including a metal layer (a scanning signal line (11) material), a gate insulative layer (30), and a semiconductor layer (31, 33) (transistor material); fluorinating a surface of the first photosensitive resin pattern (PR) by dry-etching with fluorine gas; applying a coating-type transparent insulative resin (60) onto the glass substrate (2) to fill a space in the laminated structure pattern; and removing the fluorinated first photosensitive resin pattern (PR).
    Type: Application
    Filed: December 16, 2009
    Publication date: October 13, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Kiyohiro Kawasaki
  • Publication number: 20110242464
    Abstract: According to the insulated gate transistor, a gate electrode (11A) is provided on a main surface of a glass substrate (2); a first part of an insulating layer (gate insulating layer (30) and transparent inorganic insulating layer (60)) is thicker than a second part of the insulating layer (gate insulating layer (30)), the first part being between (i) the gate electrode (11A) and (ii) a source electrode (12) and a drain electrode (21) of the insulated gate transistor, and the second part being between (i) the gate electrode (11A) and (ii) a channel section (31A) of the insulated gate transistor. This makes it possible to reduce parasitic capacitor without deteriorating characteristics of the transistor.
    Type: Application
    Filed: December 16, 2009
    Publication date: October 6, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Kiyohiro Kawasaki
  • Publication number: 20110195534
    Abstract: A four-mask process and a three-mask process proposal are constructed for a TN-type liquid crystal display device and an IPS-type liquid crystal device in which the formation of a passivation insulating layer is not required by streamlining the formation of a scan line and a pseudo-pixel element, both comprising a laminate made of a transparent conductive layer and a metal layer, at the same time and the formation of the transparent conductive pixel electrode by removing the metal layer on the pseudo-pixel electrode at the time of the formation of the opening in the gate insulating layer, by streamlining the treatment of the formation process of the contact and the formation process of the protective insulating layer using one photomask due to the introduction of half-tone exposure technology, and the formation of source-drain wires for etch-stop type insulating gate-type transistor using a photosensitive organic insulating layer and leaving the photosensitive organic insulating layer unchanged on source-drai
    Type: Application
    Filed: February 14, 2011
    Publication date: August 11, 2011
    Applicant: AU OPTRONICS CORPORATION
    Inventor: Kiyohiro KAWASAKI
  • Patent number: 7982837
    Abstract: In a conventional manufacturing process where the number of manufacturing processes is reduced to form a semiconductor layer of a channel etch-type insulating gate-type transistor and source-drain wires in one photographic etching processing using half-tone exposure technology, the manufacturing margin is narrow, lowering the yield if the distance between the source and the drain wire shortens.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: July 19, 2011
    Assignee: A U Optronics Corp.
    Inventor: Kiyohiro Kawasaki
  • Patent number: 7936408
    Abstract: A four-mask process and a three-mask process proposal are constructed for a TN-type liquid crystal display device and an IPS-type liquid crystal device in which the formation of a passivation insulating layer is not required by streamlining the formation of a scan line and a pseudo-pixel element, both comprising a laminate made of a transparent conductive layer and a metal layer, at the same time and the formation of the transparent conductive pixel electrode by removing the metal layer on the pseudo-pixel electrode at the time of the formation of the opening in the gate insulating layer, by streamlining the treatment of the formation process of the contact and the formation process of the protective insulating layer using one photomask due to the introduction of half-tone exposure technology, and the formation of source-drain wires for etch-stop type insulating gate-type transistor using a photosensitive organic insulating layer and leaving the photosensitive organic insulating layer unchanged on source-drai
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: May 3, 2011
    Assignee: AU Optronics Corporation
    Inventor: Kiyohiro Kawasaki
  • Patent number: 7898608
    Abstract: A four-mask process and a three-mask process proposal are constructed for a TN-type liquid crystal display device and an IPS-type liquid crystal device in which the formation of a passivation insulating layer is not required by streamlining the formation of a scan line and a pseudo-pixel element, both comprising a laminate made of a transparent conductive layer and a metal layer, at the same time and the formation of the transparent conductive pixel electrode by removing the metal layer on the pseudo-pixel electrode at the time of the formation of the opening in the gate insulating layer, by streamlining the treatment of the formation process of the contact and the formation process of the protective insulating layer using one photomask due to the introduction of half-tone exposure technology, and the formation of source-drain wires for etch-stop type insulating gate-type transistor using a photosensitive organic insulating layer and leaving the photosensitive organic insulating layer unchanged on source-drai
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: March 1, 2011
    Assignee: Au Optronics Corporation
    Inventor: Kiyohiro Kawasaki
  • Patent number: 7894009
    Abstract: In the conventional manufacture method that has reduced the number of manufacture processes by forming semiconductor layers and source-drain wires for a channel-etch type insulating gate transistor in a single photo etching process using halftone exposure technology, the channel length increases when the photosensitive resin pattern used at above formation process of source-drain patterning is reduced. Hence the manufacture tolerance (margin) is small, and the yield decreases when the distance between the source wire and drain wire is shortened.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: February 22, 2011
    Assignee: Au Optronics Corporation
    Inventor: Kiyohiro Kawasaki
  • Patent number: 7889285
    Abstract: A four-mask process and a three-mask process proposal are constructed for a TN-type liquid crystal display device and an IPS-type liquid crystal device in which the formation of a passivation insulating layer is not required by streamlining the formation of a scan line and a pseudo-pixel element, both comprising a laminate made of a transparent conductive layer and a metal layer, at the same time and the formation of the transparent conductive pixel electrode by removing the metal layer on the pseudo-pixel electrode at the time of the formation of the opening in the gate insulating layer, by streamlining the treatment of the formation process of the contact and the formation process of the protective insulating layer using one photomask due to the introduction of half-tone exposure technology, and the formation of source-drain wires for etch-stop type insulating gate-type transistor using a photosensitive organic insulating layer and leaving the photosensitive organic insulating layer unchanged on source-drai
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: February 15, 2011
    Assignee: Au Optronics Corporation
    Inventor: Kiyohiro Kawasaki
  • Publication number: 20110025939
    Abstract: In a conventional manufacturing process where the number of manufacturing processes is reduced to form a semiconductor layer of a channel etch-type insulating gate-type transistor and source-drain wires in one photographic etching processing using half-tone exposure technology, the manufacturing margin is narrow, lowering the yield if the distance between the source and the drain wire shortens.
    Type: Application
    Filed: October 12, 2010
    Publication date: February 3, 2011
    Inventor: Kiyohiro KAWASAKI
  • Patent number: 7830463
    Abstract: Development of 3-mask process to reduce the manufacturing cost of LCD-display device successively following 4-mask process. Opening formation process and pixel electrode formation process which is sequentially done following the opening formation process are treated with one photo-mask without using halftone exposure technology by forming source-drain wires comprising a low-resistance metal layer and a heat-resistant metal layer, the latter is capable of being removed with etching gas for etching gate insulating layer (and passivation insulating layer), giving protection means at least for the channel and the data line of the insulating gate transistor, forming openings in the insulating layers including the gate insulating layer with photosensitive resins having counter-taper cross sections, removing the exposed low-resistance metal in the openings, forming pixel electrode with the photosensitive resins as a lift-off material to lift off the conductive thin film for pixel electrode.
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: November 9, 2010
    Assignee: Quanta Display, Inc.
    Inventors: Kiyohiro Kawasaki, Jia-Tsung Lee, Chien-Hung Chen
  • Patent number: 7508369
    Abstract: A method for providing a high-response and wide-viewing-angle liquid crystal panel capable of causing a transition of liquid crystal, called the OCB mode, into a bend configuration in a short time, by providing a period in which a potential difference higher than that in a normal image display period is continuously applied between gate lines and opposing electrodes or between pixel electrodes and the opposing electrodes of a liquid crystal panel.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: March 24, 2009
    Assignee: Toshiba Matsushita Display Technology Co., Inc.
    Inventors: Mika Nakamura, Katsumi Adachi, Kiyohiro Kawasaki, Katsuji Hattori
  • Publication number: 20080297711
    Abstract: In a conventional manufacturing process where the number of manufacturing processes is reduced to form a semiconductor layer of a channel etch-type insulating gate-type transistor and source-drain wires in one photographic etching processing using half-tone exposure technology, the manufacturing margin is narrow, lowering the yield if the distance between the source and the drain wire shortens.
    Type: Application
    Filed: July 30, 2008
    Publication date: December 4, 2008
    Inventor: Kiyohiro Kawasaki
  • Patent number: 7417693
    Abstract: In a conventional manufacturing process where the number of manufacturing processes is reduced to form a semiconductor layer of a channel etch-type insulating gate-type transistor and source-drain wires in one photographic etching processing using half-tone exposure technology, the manufacturing margin is narrow, lowering the yield if the distance between the source and the drain wire shortens.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: August 26, 2008
    Assignee: A U Optronics Corp.
    Inventor: Kiyohiro Kawasaki
  • Patent number: 7391483
    Abstract: Four-mask and three-mask process for TN-type liquid crystal display made with combination of the formation process of the signal line and the formation process of the pixel electrode by forming a signal line of a laminate of a transparent conductive layer and a low-resistance metal layer and a pseudo-pixel electrode, removing a low resistance metal layer on the pseudo-pixel electrode during formation of an opening in a passivation insulating layer to obtain a pixel electrode having a transparent conductive layer. Contact formation process by removing the gate insulating layer during formation of the semiconductor layer, and the formation process of the contact and the formation process of the semiconductor layer, or the formation process of the scan line and the formation process of the contact or the formation process of the scan line and the formation process of the semiconductor layer by introducing half-tone exposure technology.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: June 24, 2008
    Assignee: Quanta Display Japan Inc.
    Inventor: Kiyohiro Kawasaki
  • Publication number: 20080030637
    Abstract: In the conventional manufacture method that has reduced the number of manufacture processes by forming semiconductor layers and source-drain wires for a channel-etch type insulating gate transistor in a single photo etching process using halftone exposure technology, the channel length increases when the photosensitive resin pattern used at above formation process of source-drain patterning is reduced. Hence the manufacture tolerance (margin) is small, and the yield decreases when the distance between the source wire and drain wire is shortened.
    Type: Application
    Filed: April 23, 2007
    Publication date: February 7, 2008
    Applicants: Quanta Display Inc.
    Inventor: Kiyohiro Kawasaki