Patents by Inventor Yukinobu Nakata

Yukinobu Nakata 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: 6084653
    Abstract: In the fabrication of an active matrix substrate, when forming a contact hole in an inter-layer insulating film made of a thermosetting resin and hardening the inter-layer insulating film by heat, the temperature gradient in raising the temperature from room temperature to a baking temperature is arranged to be larger than 10.degree. C./minute. As a result, the tilt angle of the slant face of the contact hole is controlled to be within a range of 45.degree. to 60.degree..
    Type: Grant
    Filed: February 11, 1999
    Date of Patent: July 4, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshinori Shimada, Yukinobu Nakata, Akihiro Yamamoto
  • Patent number: 6052162
    Abstract: The transmission type liquid crystal display device of this invention includes: gate lines; source lines; and switching elements each arranged near a crossing of each gate line and each source line, a gate electrode of each switching element being connected to the gate line, a source electrode of the switching element being connected to the source line, and a drain electrode of the switching element being connected to a pixel electrode for applying a voltage to a liquid crystal layer, wherein an interlayer insulating film formed of an organic film with high transparency is provided above the switching element, the gate line, and the source line, and wherein the pixel electrode formed of a transparent conductive film is provided on the interlayer insulating film.
    Type: Grant
    Filed: August 12, 1996
    Date of Patent: April 18, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takayuki Shimada, Masaru Kajitani, Masaya Okamoto, Naofumi Kondo, Mikio Katayama, Yoshikazu Sakuhana, Akihiro Yamamoto, Yukinobu Nakata, Hirohiko Nishiki, Yoshinori Shimada
  • Patent number: 5989782
    Abstract: A method for producing a liquid crystal display device includes: a pair of insulating substrates; a liquid crystal layer interposed between the pair of insulating substrates; switching elements arranged in a matrix on one of the pair of the insulating substrates; gate lines and data lines, arranged to intersect each other, for controlling the switching elements; and pixel electrodes provided above the gate lines and the data lines with an organic insulating film therebetween. The method includes the steps of forming a transparent conductive film on the organic insulating film at a first temperature; annealing the transparent conductive film at a second temperature equal to or lower than the first temperature; and patterning the transparent conductive film to form the pixel electrodes after the step of annealing.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: November 23, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hirohiko Nishiki, Yukinobu Nakata, Yoshinori Shimada
  • Patent number: 5953084
    Abstract: The transmission type liquid crystal display device of this invention includes: gate lines; source lines; and switching elements each arranged near a crossing of each gate line and each source line, a gate electrode of each switching element being connected to the gate line, a source electrode of the switching element being connected to the source line, and a drain electrode of the switching element being connected to a pixel electrode for applying a voltage to a liquid crystal layer, wherein an interlayer insulating film formed of an organic film with high transparency is provided above the switching element, the gate line, and the source line, and wherein the pixel electrode formed of a transparent conductive film is provided on the interlayer insulating film.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: September 14, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takayuki Shimada, Masaru Kajitani, Masaya Okamoto, Naofumi Kondo, Mikio Katayama, Yoshikazu Sakuhana, Akihiro Yamamoto, Yukinobu Nakata, Hirohiko Nishiki, Yoshinori Shimada
  • Patent number: 5907376
    Abstract: In the fabrication of an active matrix substrate, when forming a contact hole in an inter-layer insulating film made of a thermosetting resin and hardening the inter-layer insulating film by heat, the temperature gradient in raising the temperature from room temperature to a baking temperature is arranged to be larger than 10.degree. C./minute. As a result, the tilt angle of the slant face of the contact hole is controlled to be within a range of 45.degree. to 60.degree..
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: May 25, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshinori Shimada, Yukinobu Nakata, Akihiro Yamamoto
  • Patent number: 5538905
    Abstract: A method for forming a transparent conductive film includes the steps of: forming an ITO film on a substrate by sputtering a target including oxygen atoms, indium atoms, and tin atoms under an inert gas atmosphere; patterning the ITO film by selectively removing a prescribed portion of the ITO film using an etching method; and doping the patterned ITO film with oxygen using an ion shower doping method, thereby forming the transparent conductive film from the ITO film.
    Type: Grant
    Filed: October 20, 1993
    Date of Patent: July 23, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yukiya Nishioka, Yukinobu Nakata, Hidenori Negoto, Yoshinori Shimada, Takehisa Sakurai, Mikio Katayama