Patents by Inventor Masafumi ITASAKA

Masafumi ITASAKA 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: 10396249
    Abstract: A semiconductor light emitting element having: a semiconductor laminated body; a full surface electrode containing an Ag provided on an upper surface of the p-type semiconductor layer; a cover electrode that covers a surface of the full surface electrode, is provided to contact on the upper surface of the p-type semiconductor layer at an outer edge of the full surface electrode, and is made of an Al-based metal material; a p-side electrode that is provided on a portion of a surface of the cover electrode; a metal oxide film that covers other surfaces of the cover electrode and contains an oxide of a metal material forming the cover electrode; and an insulation film that is made of an oxide and covers a surface of the metal oxide film, is provided.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: August 27, 2019
    Assignee: NICHIA CORPORATION
    Inventors: Hirofumi Kawaguchi, Akinori Yoneda, Hisashi Kasai, Kazuki Kashimoto, Masafumi Itasaka
  • Publication number: 20180102460
    Abstract: A semiconductor light emitting element having: a semiconductor laminated body; a full surface electrode containing an Ag provided on an upper surface of the p-type semiconductor layer; a cover electrode that covers a surface of the full surface electrode, is provided to contact on the upper surface of the p-type semiconductor layer at an outer edge of the full surface electrode, and is made of an Al-based metal material; a p-side electrode that is provided on a portion of a surface of the cover electrode; a metal oxide film that covers other surfaces of the cover electrode and contains an oxide of a metal material forming the cover electrode; and an insulation film that is made of an oxide and covers a surface of the metal oxide film, is provided.
    Type: Application
    Filed: December 13, 2017
    Publication date: April 12, 2018
    Inventors: Hirofumi KAWAGUCHI, Akinori YONEDA, Hisashi KASAI, Kazuki KASHIMOTO, Masafumi ITASAKA
  • Patent number: 9876147
    Abstract: A semiconductor light emitting element having: a semiconductor laminated body; a full surface electrode containing an Ag provided on an upper surface of the p-type semiconductor layer; a cover electrode that covers a surface of the full surface electrode, is provided to contact on the upper surface of the p-type semiconductor layer at an outer edge of the full surface electrode, and is made of an Al-based metal material; a p-side electrode that is provided on a portion of a surface of the cover electrode; a metal oxide film that covers other surfaces of the cover electrode and contains an oxide of a metal material forming the cover electrode; and an insulation film that is made of an oxide and covers a surface of the metal oxide film, is provided.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: January 23, 2018
    Assignee: NICHIA CORPORATION
    Inventors: Hirofumi Kawaguchi, Akinori Yoneda, Hisashi Kasai, Kazuki Kashimoto, Masafumi Itasaka
  • Patent number: 9553238
    Abstract: A method of manufacturing a semiconductor light emitting element includes forming a semiconductor stacked layer body on a substrate, the semiconductor stacked layer body including a first semiconductor layer and a second semiconductor layer; removing a portion of the semiconductor stacked layer body and exposing the first semiconductor layer such that the second semiconductor layer includes an extending portion that extends in a plane direction; forming a conductor layer electrically connecting the first semiconductor layer and the extending portion of the second semiconductor layer; forming a first electrode electrically connected to the first semiconductor layer and a second electrode electrically connected to the second semiconductor layer; forming a protective film covering at least a portion of the first electrode and at least a portion of the second electrode; and after forming the protective film, removing a portion of the exposed portion of the extending portion.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: January 24, 2017
    Assignee: NICHIA CORPORATION
    Inventors: Kazuki Kashimoto, Masafumi Itasaka, Hisashi Kasai, Naoki Azuma
  • Publication number: 20160284940
    Abstract: A semiconductor light emitting element having: a semiconductor laminated body; a full surface electrode containing an Ag provided on an upper surface of the p-type semiconductor layer; a cover electrode that covers a surface of the full surface electrode, is provided to contact on the upper surface of the p-type semiconductor layer at an outer edge of the full surface electrode, and is made of an Al-based metal material; a p-side electrode that is provided on a portion of a surface of the cover electrode; a metal oxide film that covers other surfaces of the cover electrode and contains an oxide of a metal material forming the cover electrode; and an insulation film that is made of an oxide and covers a surface of the metal oxide film, is provided.
    Type: Application
    Filed: June 3, 2016
    Publication date: September 29, 2016
    Inventors: Hirofumi KAWAGUCHI, Akinori YONEDA, Hisashi KASAI, Kazuki KASHIMOTO, Masafumi ITASAKA
  • Patent number: 9385280
    Abstract: A semiconductor light emitting element having: a semiconductor laminated body; a full surface electrode containing an Ag provided on an upper surface of the p-type semiconductor layer; a cover electrode that covers a surface of the full surface electrode, is provided to contact on the upper surface of the p-type semiconductor layer at an outer edge of the full surface electrode, and is made of an Al-based metal material; a p-side electrode that is provided on a portion of a surface of the cover electrode; a metal oxide film that covers other surfaces of the cover electrode and contains an oxide of a metal material forming the cover electrode; and an insulation film that is made of an oxide and covers a surface of the metal oxide film, is provided.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: July 5, 2016
    Assignee: NICHIA CORPORATION
    Inventors: Hirofumi Kawaguchi, Akinori Yoneda, Hisashi Kasai, Kazuki Kashimoto, Masafumi Itasaka
  • Publication number: 20160149085
    Abstract: A method of manufacturing a semiconductor light emitting element includes forming a semiconductor stacked layer body on a substrate, the semiconductor stacked layer body including a first semiconductor layer and a second semiconductor layer; removing a portion of the semiconductor stacked layer body and exposing the first semiconductor layer such that the second semiconductor layer includes an extending portion that extends in a plane direction; forming a conductor layer electrically connecting the first semiconductor layer and the extending portion of the second semiconductor layer; forming a first electrode electrically connected to the first semiconductor layer and a second electrode electrically connected to the second semiconductor layer; forming a protective film covering at least a portion of the first electrode and at least a portion of the second electrode; and after forming the protective film, removing a portion of the exposed portion of the extending portion.
    Type: Application
    Filed: November 20, 2015
    Publication date: May 26, 2016
    Applicant: NICHIA CORPORATION
    Inventors: Kazuki KASHIMOTO, Masafumi ITASAKA, Hisashi KASAI, Naoki AZUMA
  • Publication number: 20140339587
    Abstract: A semiconductor light emitting element having: a semiconductor laminated body; a full surface electrode containing an Ag provided on an upper surface of the p-type semiconductor layer; a cover electrode that covers a surface of the full surface electrode, is provided to contact on the upper surface of the p-type semiconductor layer at an outer edge of the full surface electrode, and is made of an Al-based metal material; a p-side electrode that is provided on a portion of a surface of the cover electrode; a metal oxide film that covers other surfaces of the cover electrode and contains an oxide of a metal material forming the cover electrode; and an insulation film that is made of an oxide and covers a surface of the metal oxide film, is provided.
    Type: Application
    Filed: May 16, 2014
    Publication date: November 20, 2014
    Applicant: NICHIA CORPORATION
    Inventors: Hirofumi KAWAGUCHI, Akinori YONEDA, Hisashi KASAI, Kazuki KASHIMOTO, Masafumi ITASAKA