Patents by Inventor Nobuaki Ishiga

Nobuaki Ishiga 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).

  • Publication number: 20070295967
    Abstract: An active matrix TFT array substrate includes a gate electrode and a gate line formed from a first metal film over a transparent insulating substrate, a gate insulating film to cover the gate electrode and gate line, a semiconductor layer formed over the gate insulating film, a source electrode and a drain electrode formed over the semiconductor layer and a pixel electrode formed from a transparent conductive film. Either of the source or the drain electrode is formed from the transparent conductive film and the active matrix TFT array substrate further comprises a second metal film thereover mainly including one of Al, Cu and Ag.
    Type: Application
    Filed: June 6, 2007
    Publication date: December 27, 2007
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazuyuki HARADA, Nobuaki Ishiga, Kazunori Inoue
  • Publication number: 20070284742
    Abstract: A semiconductor device includes a semiconductor layer, an Al alloy film electrically connected to the semiconductor layer, and a transparent electrode layer directly contacting with the Al alloy film at least over an insulating substrate. The Al alloy film includes one or more kinds of elements selected from Fe, Co and Ni in total of 0.5 to 10 mol %, and a remaining substantially comprises Al.
    Type: Application
    Filed: April 27, 2007
    Publication date: December 13, 2007
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazunori Inoue, Nobuaki Ishiga, Kensuke Nagayama, Kazumasa Kawase
  • Publication number: 20070096098
    Abstract: A conductive structure includes a laminated structure of an upper layer and a lower layer. The lower layer is formed of an aluminum alloy containing at least one kind of Group 8 elements in periodic table. The upper layer is laminated on the lower layer and formed of an aluminum alloy containing at least one kind of Group 8 elements in periodic table and nitrogen.
    Type: Application
    Filed: October 20, 2006
    Publication date: May 3, 2007
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Nobuaki Ishiga, Kensuke Nagayama, Kenichi Miyamoto, Tadaki Nakahori, Kazunori Inoue
  • Publication number: 20070069211
    Abstract: According to an aspect of the present invention, there is provided a display apparatus including a TFT array substrate on which TFTs are formed in an array, a counter substrate disposed so as to face the TFT array substrate, and a sealing pattern for adhering the TFT array substrate and the counter substrate to each other, wherein the counter substrate comprises a counter electrode, and the TFT array substrate comprises a first conductive layer, a first insulating film formed on the first conductive layer, a second conductive layer disposed so as to intersect the first conductive layer via the first insulating film, a second insulating film formed on the second conductive layer and having at least two layers, and common electrode wiring provided below the sealing pattern and electrically connected to the counter electrode by the sealing pattern, and the sealing pattern overlaps the second conductive layer via the second insulating film.
    Type: Application
    Filed: September 26, 2006
    Publication date: March 29, 2007
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazunori Inoue, Harumi Murakami, Toshio Araki, Nobuaki Ishiga
  • Publication number: 20070026324
    Abstract: A substrate with a light-shielding film according to one mode of the invention is obtained in a method of manufacture of a substrate with a light-shielding film having a light-shielding film pattern formed on a substrate, by depositing in order a first film having chromium oxide and a second film having chromium on a substrate, to form a multilayer film; forming a resist pattern on the multilayer film; performing etching of the multilayer film, using an etching liquid comprising ceric ammonium nitrate to which nitric acid is added at a concentration of at least 2.5 mol/liter, to form a light-shielding film pattern; and removing the resist pattern.
    Type: Application
    Filed: July 12, 2006
    Publication date: February 1, 2007
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takuji Yoshida, Hatsumi Kimura, Nobuaki Ishiga, Takahito Yamabe, Toshio Araki
  • Publication number: 20060267120
    Abstract: A liquid crystal apparatus includes a TFT array substrate which includes gate wirings having a gate electrode, source wirings having a source electrode, a thin film transistor having the gate electrode, a semiconductor layer, the source electrode, and a drain electrode, an interlayer insulating film provided above the thin film transistor and the gate and source wirings, a transparent pixel electrode having a first transparent conductive film connected to the drain electrode through a contact hole, and put into contact with a surface of a insulating substrate through a pixel opening provided in a gate insulating film and the interlayer insulating film, a reflective pixel electrode made of an Al-alloy connected to the drain electrode, and a second transparent conductive film formed on the reflective electrode. The second transparent conductive film has a same pattern shape as the reflective pixel electrode and a thickness thereof is at least 5 nm.
    Type: Application
    Filed: March 1, 2006
    Publication date: November 30, 2006
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Tadaki Nakahori, Nobuaki Ishiga, Kensuke Nagayama, Takuji Yoshida
  • Publication number: 20060261335
    Abstract: An object of the present invention is to provide a liquid crystal display device that is capable of preventing anomalous growth of a protective insulating film when the protective insulating film is formed to cover a conductive film that was formed by patterning an amorphous conductive film into given shape with a certain etchant. A liquid crystal display device according to an example of the present invention includes a glass substrate having a thin film transistor formed on its upper surface, a color filter substrate having an opposing electrode formed on its upper surface, and a liquid crystal sandwiched between the glass substrate and the color filter substrate. A pixel electrode is connected to the drain electrode of a thin film transistor. Also, the pixel electrode is covered by a protective insulating film having transparency. The pixel electrode contains an oxide compound containing In and Zn.
    Type: Application
    Filed: February 24, 2006
    Publication date: November 23, 2006
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Tadaki Nakahori, Yuusuke Uchida, Kensuke Nagayama, Nobuaki Ishiga
  • Publication number: 20060192481
    Abstract: An organic electroluminescence type display apparatus of top emission type, in which a thin film transistor (TFT), a flattening film made of organic resin and an organic EL element, in which at least an anode, an electroluminescence layer and a cathode are laminated on the flattening film in this order, are formed in each picture element in a display region on a substrate. The anode is composed of at least two layer film including an aluminum (Al) alloy film containing as a impurity at least one of transition metals of the eighth group of 3d into Al and including a light transmitting conductive oxide film laminated on the Al alloy film.
    Type: Application
    Filed: December 13, 2005
    Publication date: August 31, 2006
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Kensuke Nagayama, Nobuaki Ishiga, Kazunori Inoue, Toru Takeguchi, Hiroyuki Fuchigami
  • Publication number: 20060022199
    Abstract: A method of producing a thin film transistor array substrate which includes an insulating substrate, a display pixel having a pixel electrode connected to a drain electrode, a gate wiring, and a source wiring perpendicular to the gate wiring, comprising forming a first thin metal multi-layer film an upper layer of which includes aluminum, and spreading a photo-resist, forming the photo-resist to a thickness less in an area connected to a second thin metal film than other area, patterning the first thin metal film, reducing a thickness of the photo-resist layer and removing the photo-resist in the area, removing the upper layer in the area to expose a lower layer, forming an interlayer insulating film and patterning it to expose the lower layer in the area, and patterning the second thin metal film to include the area, to connect the lower layer to the second thin metal film.
    Type: Application
    Filed: July 27, 2005
    Publication date: February 2, 2006
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Nobuaki Ishiga, Takuji Yoshida, Yuichi Masutani, Shingo Nagano
  • Publication number: 20050219451
    Abstract: The present invention intends to provide a manufacturing method of a semi-transmissive liquid crystal display device in which method a structure and manufacturing process thereof are simplified to enable to reduce the manufacturing cost. In order to achieve the above object, a semi-transmissive liquid crystal display device in the invention has a layer constitution in which a reflective pixel electrode is formed with a second conductive film that constitutes a source electrode, a drain electrode, a source wiring and so on and on an upper layer of the second metal film a transmissive pixel electrode made of a transparent conductive film is formed through the insulating film. A TFT array substrate can be formed through 5 times of photoengraving process.
    Type: Application
    Filed: March 30, 2005
    Publication date: October 6, 2005
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Yuichi Masutani, Shingo Nagano, Takkuji Yoshida, Nobuaki Ishiga, Kazunori Inoue
  • Publication number: 20050024549
    Abstract: A manufacturing method of TFT array substrate of an LCD includes step A of forming gate wiring and a gate electrode by subjecting a first metal thin film to a photolithography process; step B of forming semiconductor active film by subjecting a gate insulating film to photolithograhy; step C of forming a source wiring, and source and drain electrodes by subjecting a second metal thin film to a photolithography; step D of forming an interlayer insulating film, thereafter forming a contact hole by subjecting the interlayer insulating film to photolithography; and step E of forming a pixel electrode by subjecting a transparent conductive film to photolithography where the second metal thin film is composed of an alloy containing Mo as a main component. The step B and C are replaced by a step of forming a gate insulating film and a second metal thin film, thereafter forming a TFT by a photolithography.
    Type: Application
    Filed: July 28, 2004
    Publication date: February 3, 2005
    Inventors: Fumihiro Gotoh, Nobuaki Ishiga, Toshio Araki, Kazunori Inoue, Hiroyasu Itoh, Eiji Shibata, Masanao Nabeshima
  • Patent number: 6468822
    Abstract: By using a metal thin film comprising a layer of metal and a layer obtained by adding nitrogen atoms to metal for a metal thin film which becomes a gate electrode and the like, and for a metal thin film which becomes a source electrode and a drain electrode, there is prepared electro-optic elements free from display defects caused by high contact resistance at connected portion of the pixel electrode with the above electrodes even when a low resistance line material is used.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: October 22, 2002
    Assignee: Advanced Display Inc.
    Inventors: Yoichiro Maeda, Nobuhiro Nakamura, Nobuaki Ishiga, Kazunori Inoue
  • Publication number: 20010029054
    Abstract: By using a metal thin film comprising a layer of metal and a layer obtained by adding nitrogen atoms to metal for a metal thin film which becomes a gate electrode and the like, and for a metal thin film which becomes a source electrode and a drain electrode, there is prepared electro-optic elements free from display defects caused by high contact resistance at connected portion of the pixel electrode with the above electrodes even when a low resistance line material is used.
    Type: Application
    Filed: March 30, 2001
    Publication date: October 11, 2001
    Applicant: ADVANCED DISPLAY INC.
    Inventors: Yoichiro Maeda, Nobuhiro Nakamura, Nobuaki Ishiga, Kazunori Inoue