Patents by Inventor Keisuke HIGASHITANI

Keisuke HIGASHITANI 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: 20230343892
    Abstract: A method for manufacturing a light-emitting element includes: forming a semiconductor structure comprising a light-emitting layer on a first surface of a substrate, wherein the first surface comprising a plurality of protrusions and a second region; dividing the semiconductor structure into a plurality of light-emitting portions by removing a portion of the semiconductor structure so as to form an exposed region of the substrate, wherein the second region is exposed from under the semiconductor structure in the exposed region; bonding a light-transmitting body to a second surface of the substrate that is opposite the first surface so as to form a bonded body, wherein the light-transmitting body comprises a fluorescer; forming a plurality of modified regions along the exposed region; removing a portion of the light-transmitting body that overlaps the plurality of modified regions in a plan view; and singulating the bonded body along the modified regions.
    Type: Application
    Filed: June 28, 2023
    Publication date: October 26, 2023
    Applicant: NICHIA CORPORATION
    Inventors: Yoshiki INOUE, Shun KITAHAMA, Yoshiyuki AIHARA, Yoshiki MATSUSHITA, Keisuke HIGASHITANI
  • Patent number: 11735686
    Abstract: A method for manufacturing a light-emitting element includes dividing a semiconductor structure into a plurality of light-emitting portions by removing a portion of the semiconductor structure so as to form an exposed region, a first surface being exposed from under the semiconductor structure in the exposed region; etching protrusions formed in the exposed region; bonding a light-transmitting body to a second surface so as to form a bonded body; forming a plurality of modified regions along the exposed region inside the substrate by irradiating a laser beam on the exposed region from the first surface side; removing a portion of the light-transmitting body that overlaps the plurality of modified regions in a plan view; and singulating the bonded body along the modified regions.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: August 22, 2023
    Assignee: NICHIA CORPORATION
    Inventors: Yoshiki Inoue, Shun Kitahama, Yoshiyuki Aihara, Yoshiki Matsushita, Keisuke Higashitani
  • Patent number: 11101404
    Abstract: A method for manufacturing a semiconductor device includes: preparing a wafer including sapphire, the wafer having an upper surface that includes a first region and a second region, the second region surrounding the first region and located at a position at least 2 ?m higher or lower than the first region; and forming a semiconductor layer at the upper surface, the semiconductor layer including at least one layer that comprises AlzGa1?zN (0.03?z?0.15).
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: August 24, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Yoshinori Miyamoto, Tokutaro Okabe, Yuya Kagoshima, Keisuke Higashitani, Chiaki Ozaki
  • Publication number: 20210193867
    Abstract: A method for manufacturing a light-emitting element includes dividing a semiconductor structure into a plurality of light-emitting portions by removing a portion of the semiconductor structure so as to form an exposed region, a first surface being exposed from under the semiconductor structure in the exposed region; etching protrusions formed in the exposed region; bonding a light-transmitting body to a second surface so as to form a bonded body; forming a plurality of modified regions along the exposed region inside the substrate by irradiating a laser beam on the exposed region from the first surface side; removing a portion of the light-transmitting body that overlaps the plurality of modified regions in a plan view; and singulating the bonded body along the modified regions.
    Type: Application
    Filed: December 7, 2020
    Publication date: June 24, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Yoshiki INOUE, Shun KITAHAMA, Yoshiyuki AIHARA, Yoshiki MATSUSHITA, Keisuke HIGASHITANI
  • Patent number: 10461222
    Abstract: A light-emitting element includes: a sapphire substrate having a c-plane at a main surface thereof; and a semiconductor layer provided at the main surface side of the sapphire substrate. The sapphire substrate includes a first unit including a first region, a second region, and a third region, wherein, when viewed from the main surface side, the three regions together have a shape of a regular hexagon that is evenly divided into the three regions such that each region has a shape of a rhombus; and a plurality of second units disposed to be aligned with each side of the first unit, the second unit having mirror symmetry relative to the first unit. The first unit and the second units are arranged to make a space at the center of the unit.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: October 29, 2019
    Assignee: NICHIA CORPORATION
    Inventors: Makoto Abe, Keisuke Higashitani, Naoki Azuma, Akiyoshi Kinouchi
  • Publication number: 20190296190
    Abstract: A method for manufacturing a semiconductor device includes: preparing a wafer including sapphire, the wafer having an upper surface that includes a first region and a second region, the second region surrounding the first region and located at a position at least 2 ?m higher or lower than the first region; and forming a semiconductor layer at the upper surface, the semiconductor layer including at least one layer that comprises AlzGa1-zN (0.03?z?0.15).
    Type: Application
    Filed: March 14, 2019
    Publication date: September 26, 2019
    Applicant: NICHIA CORPORATION
    Inventors: Yoshinori MIYAMOTO, Tokutaro OKABE, Yuya KAGOSHIMA, Keisuke HIGASHITANI, Chiaki OZAKI
  • Publication number: 20180062036
    Abstract: A light-emitting element includes: a sapphire substrate having a c-plane at a main surface thereof; and a semiconductor layer provided at the main surface side of the sapphire substrate. The sapphire substrate includes a first unit including a first region, a second region, and a third region, wherein, when viewed from the main surface side, the three regions together have a shape of a regular hexagon that is evenly divided into the three regions such that each region has a shape of a rhombus; and a plurality of second units disposed to be aligned with each side of the first unit, the second unit having mirror symmetry relative to the first unit. The first unit and the second units are arranged to make a space at the center of the unit.
    Type: Application
    Filed: August 30, 2017
    Publication date: March 1, 2018
    Applicant: NICHIA CORPORATION
    Inventors: Makoto ABE, Keisuke HIGASHITANI, Naoki AZUMA, Akiyoshi KINOUCHI
  • Patent number: 9773946
    Abstract: A light-emitting element includes: a sapphire substrate having a c-plane at a main surface thereof; and a semiconductor layer provided at the main surface side of the sapphire substrate. The sapphire substrate includes a first unit including a first region, a second region, and a third region, wherein, when viewed from the main surface side, the three regions together have a shape of a regular hexagon that is evenly divided into the three regions such that each region has a shape of a rhombus; and a plurality of second units disposed to be aligned with each side of the first unit, the second unit having mirror symmetry relative to the first unit. The first unit and the second units are arranged to make a space at the center of the unit.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: September 26, 2017
    Assignee: NICHIA CORPORATION
    Inventors: Makoto Abe, Keisuke Higashitani, Naoki Azuma, Akiyoshi Kinouchi
  • Publication number: 20160240738
    Abstract: A light-emitting element includes: a sapphire substrate having a c-plane at a main surface thereof; and a semiconductor layer provided at the main surface side of the sapphire substrate. The sapphire substrate includes a first unit including a first region, a second region, and a third region, wherein, when viewed from the main surface side, the three regions together have a shape of a regular hexagon that is evenly divided into the three regions such that each region has a shape of a rhombus; and a plurality of second units disposed to be aligned with each side of the first unit, the second unit having mirror symmetry relative to the first unit. The first unit and the second units are arranged to make a space at the center of the unit.
    Type: Application
    Filed: February 16, 2016
    Publication date: August 18, 2016
    Applicant: NICHIA CORPORATION
    Inventors: Makoto ABE, Keisuke HIGASHITANI, Naoki AZUMA, Akiyoshi KINOUCHI