Patents by Inventor Yoshikazu UMETA

Yoshikazu UMETA 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: 11326275
    Abstract: A SiC epitaxial growth apparatus according to an embodiment includes a mounting stand on which a SiC wafer is mounted, and a furnace body which is configured to cover the mounting stand, and the furnace body includes a raw material gas supply port which is positioned so as to face the mounting stand and is configured to supply a raw material gas to the growth space, a first purge gas supply port which surrounds a vicinity of the raw material gas supply port and is configured to supply a purge gas to the growth space, and a second purge gas supply port which surrounds a vicinity of the first purge gas supply port and is configured to supply a purge gas to the growth space.
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: May 10, 2022
    Assignee: SHOWA DENKO K.K.
    Inventors: Yoshikazu Umeta, Hironori Atsumi
  • Publication number: 20210217648
    Abstract: A susceptor which is used in a chemical vapor deposition apparatus for growing an epitaxial layer on a principal plane of a wafer by a chemical vapor deposition method, and which includes a base; and three protrusion parts that are disposed on an outer circumferential part of the base and support an outer circumferential part of the wafer, is provided.
    Type: Application
    Filed: March 24, 2021
    Publication date: July 15, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Jia Yu, Naoto Ishibashi, Keisuke Fukada, Yoshikazu Umeta, Hironori Atsumi
  • Publication number: 20210202294
    Abstract: A susceptor for supporting a disk-shaped wafer when performing a surface treatment, includes a protruding region, and at least three support parts, provided on the protruding region, and configured to support the disk-shaped wafer by making contact with a back surface of the disk-shaped wafer. A ratio of a total area of the support parts with respect to an area of the protruding region is 10% or less in a plan view of the disk-shaped wafer.
    Type: Application
    Filed: December 3, 2020
    Publication date: July 1, 2021
    Inventors: Yuichiro MABUCHI, Yoshikazu UMETA
  • Publication number: 20210066113
    Abstract: A susceptor (1) of the present invention is a susceptor that is configured to hold a wafer in a CVD apparatus that forms a layer on a wafer through chemical vapor deposition, and includes an external susceptor (2) and an internal susceptor (1). The external susceptor (2) has an opening (2c) that accommodates the internal susceptor (1) in a coupling manner and has a wafer placement surface (2a) on which an outer peripheral portion (Ws) of a wafer is placed. The internal susceptor (1) includes a projection portion (1a) on a surface (1b) facing the wafer (W), and a height (h) of the projection portion (1a) is a height at which the projection portion does not come into contact with the wafer (W) when the wafer (W) is placed on the susceptor.
    Type: Application
    Filed: June 22, 2018
    Publication date: March 4, 2021
    Applicant: SHOWA DENKO K.K.
    Inventors: Yoshikazu UMETA, Keisuke FUKADA, Naoto ISHIBASHI, Hironori ATSUMI
  • Patent number: 10801128
    Abstract: A SiC epitaxial growth apparatus includes: a susceptor having a mounting surface on which a wafer is placable; a heater which is provided apart from the susceptor on a side opposite to the mounting surface of the susceptor; and an annular radiation member which is in contact with a back surface of the susceptor opposite to the mounting surface and is located at a position which is overlapped with an outer peripheral portion of the wafer placed on the susceptor in a plan view, in which the radiation member has a higher emissivity than that of the susceptor and has an exposed portion as viewed from the heater.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: October 13, 2020
    Assignee: SHOWA DENKO K.K.
    Inventors: Yasunori Motoyama, Yoshishige Okuno, Yoshikazu Umeta, Keisuke Fukada
  • Publication number: 20200199745
    Abstract: Provided is a SiC chemical vapor deposition apparatus including: a furnace body inside of which a growth space is formed; and a placement table which is positioned in the growth space and has a placement surface on which a SiC wafer is placed, in which the furnace body comprises a first hole which is positioned on an upper portion which faces the placement surface and through which a raw material gas is introduced into the growth space, a second hole which is positioned on a side wall of the furnace body and through which a purge gas flows into the growth space, a third hole which is positioned on the side wall of the furnace body at a lower position than the second hole and discharges the gases in the growth space, and a protrusion which is protrudes towards the growth space from a lower end of the second hole to adjust a flow of the raw material gas.
    Type: Application
    Filed: December 17, 2019
    Publication date: June 25, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Yoshikazu UMETA, Yoshishige OKUNO, Rimpei KINDAICHI
  • Publication number: 20200190665
    Abstract: A SiC chemical vapor deposition device according to the present embodiment includes a placement table on which a SiC wafer is placed; and a furnace body that covers the placement table, in which the furnace body has a side wall and a ceiling that has a gas supply port for supplying raw material gas to the inside of the furnace body, covers a periphery of the gas supply port, and is positioned above the placement table, and emissivity of an inner surface of the ceiling is lower than that of an inner surface of the side wall.
    Type: Application
    Filed: December 11, 2019
    Publication date: June 18, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Yoshikazu UMETA, Yoshishige OKUNO, Rimpei KINDAICHI
  • Publication number: 20200173053
    Abstract: A SiC epitaxial growth apparatus according to an embodiment includes a mounting stand on which a SiC wafer is mounted, and a furnace body which is configured to cover the mounting stand, and the furnace body includes a raw material gas supply port which is positioned so as to face the mounting stand and is configured to supply a raw material gas to the growth space, a first purge gas supply port which surrounds a vicinity of the raw material gas supply port and is configured to supply a purge gas to the growth space, and a second purge gas supply port which surrounds a vicinity of the first purge gas supply port and is configured to supply a purge gas to the growth space.
    Type: Application
    Filed: November 29, 2019
    Publication date: June 4, 2020
    Applicant: SHOWA DENKO K.K
    Inventors: Yoshikazu Umeta, Hironori Atsumi
  • Publication number: 20200173023
    Abstract: A SiC chemical vapor deposition apparatus is provided, including: a furnace body inside of which a growth space is formed; and a mounting table which is positioned on a lower portion of the growth space and has a mounting surface on which a SiC wafer is mounted, in which the furnace body is separated into a plurality of members in a vertical direction substantially orthogonal to the mounting table, the plurality of members includes a first portion and a second portion, the first portion includes a protruding part that protrudes in an outer peripheral direction, the second portion includes a hook part on which the protruding part is hung, and the first portion and the second portion are connected to each other by hanging the hook part on the protruding part.
    Type: Application
    Filed: November 29, 2019
    Publication date: June 4, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Yoshikazu UMETA, Hironori ATSUMI
  • Publication number: 20200083085
    Abstract: A susceptor which is used in a chemical vapor deposition apparatus for growing an epitaxial layer on a principal plane of a wafer by a chemical vapor deposition method, and which includes a base; and three protrusion parts that are disposed on an outer circumferential part of the base and support an outer circumferential part of the wafer, is provided.
    Type: Application
    Filed: September 4, 2019
    Publication date: March 12, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Jia YU, Naoto ISHIBASHI, Keisuke FUKADA, Yoshikazu UMETA, Hironori ATSUMI
  • Publication number: 20190161886
    Abstract: A SiC epitaxial growth apparatus includes: a susceptor having a mounting surface on which a wafer is placable; and a heater which is provided apart from the susceptor on a side opposite to the mounting surface of the susceptor, in which an unevenness is formed on a radiation-receiving surface of the susceptor, which faces a first surface of the heater provided at the susceptor side, and the unevenness is located at a position which is overlapped with an outer peripheral portion of the wafer placed on the susceptor in a plan view.
    Type: Application
    Filed: November 20, 2018
    Publication date: May 30, 2019
    Applicant: SHOWA DENKO K.K.
    Inventors: Yasunori MOTOYAMA, Yoshishige OKUNO, Yoshikazu UMETA, Keisuke FUKADA
  • Publication number: 20190161885
    Abstract: A SiC epitaxial growth apparatus includes: a susceptor having a mounting surface on which a wafer is placable; a heater which is provided apart from the susceptor on a side opposite to the mounting surface of the susceptor; and an annular radiation member which is in contact with a back surface of the susceptor opposite to the mounting surface and is located at a position which is overlapped with an outer peripheral portion of the wafer placed on the susceptor in a plan view, in which the radiation member has a higher emissivity than that of the susceptor and has an exposed portion as viewed from the heater.
    Type: Application
    Filed: November 20, 2018
    Publication date: May 30, 2019
    Applicant: SHOWA DENKO K.K.
    Inventors: Yasunori MOTOYAMA, Yoshishige OKUNO, Yoshikazu UMETA, Keisuke FUKADA
  • Publication number: 20190144995
    Abstract: A chemical vapor deposition apparatus is provided which comprises a reaction furnace in which vapor deposition is performed and an exhaust pipe which discharges a gas from an interior of the reaction furnace, wherein the exhaust pipe includes at least one of a bending part, and the bending part includes at least one of a pipe-extension part, and the pipe-extension part extends from the bending part and has a storage space in the pipe-extension part.
    Type: Application
    Filed: October 31, 2018
    Publication date: May 16, 2019
    Applicant: SHOWA DENKO K.K.
    Inventors: Naoto ISHIBASHI, Keisuke FUKADA, Yoshikazu UMETA, Tomohiro KODAMA