Patents by Inventor Tatsumi Usami

Tatsumi Usami 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: 11462561
    Abstract: According to one embodiment, a semiconductor device includes: a wiring layer including a first metallic film provided on an oxide film, a second metallic film provided on the first metallic film, and a polysilicon film provided on the second metallic film; and an element layer provided on the wiring layer and including semiconductor elements electrically connected to the first metallic film. Standard Gibbs energy of formation of a first metal included in the first metallic film is lower than that of a second metal included in the second metallic film.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: October 4, 2022
    Assignee: Kioxia Corporation
    Inventors: Takashi Izumi, Akitsugu Hatazaki, Masaaki Hatano, Tatsumi Usami
  • Publication number: 20210074722
    Abstract: According to one embodiment, a semiconductor device includes: a wiring layer including a first metallic film provided on an oxide film, a second metallic film provided on the first metallic film, and a polysilicon film provided on the second metallic film; and an element layer provided on the wiring layer and including semiconductor elements electrically connected to the first metallic film. Standard Gibbs energy of formation of a first metal included in the first metallic film is lower than that of a second metal included in the second metallic film.
    Type: Application
    Filed: August 28, 2020
    Publication date: March 11, 2021
    Applicant: Kioxia Corporation
    Inventors: Takashi Izumi, Akitsugu Hatazaki, Masaaki Hatano, Tatsumi Usami
  • Patent number: 10658162
    Abstract: A semiconductor manufacturing apparatus includes a vacuum chamber, a rotary member, a first magnet, a second magnet, and a magnetic body. The vacuum chamber contains a substrate and a target located opposite to the substrate. The rotary member has a first surface located on a back side of the target outside the vacuum chamber. The first magnet is provided on the first surface. The second magnet has a magnetic pole opposite to a magnetic pole of the first magnet and is provided on an inner side of the first magnet on the first surface. The magnetic body is provided between the first magnet and the second magnet and is configured to be movable backward and forward in a vertical direction.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: May 19, 2020
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventor: Tatsumi Usami
  • Patent number: 10446419
    Abstract: A semiconductor manufacturing apparatus according to the present embodiment includes a first cooler, a second cooler, and a temperature controller. The first cooler includes a first placing portion that can place a central portion of a semiconductor substrate thereon, and cools the central portion by heat exchange with the first placing portion. The second cooler includes a second placing portion that can place a peripheral portion of the semiconductor substrate thereon in a periphery of the first placing portion, and cools the peripheral portion. The temperature controller controls a temperature of the second placing portion to be lower than a temperature of the semiconductor substrate and to be higher than a temperature of the first placing portion.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: October 15, 2019
    Assignee: Toshiba Memory Corporation
    Inventor: Tatsumi Usami
  • Publication number: 20180261437
    Abstract: A semiconductor manufacturing apparatus includes a vacuum chamber, a rotary member, a first magnet, a second magnet, and a magnetic body. The vacuum chamber contains a substrate and a target located opposite to the substrate. The rotary member has a first surface located on a back side of the target outside the vacuum chamber. The first magnet is provided on the first surface. The second magnet has a magnetic pole opposite to a magnetic pole of the first magnet and is provided on an inner side of the first magnet on the first surface. The magnetic body is provided between the first magnet and the second magnet and is configured to be movable backward and forward in a vertical direction.
    Type: Application
    Filed: September 5, 2017
    Publication date: September 13, 2018
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventor: Tatsumi USAMI
  • Publication number: 20170263474
    Abstract: A semiconductor manufacturing apparatus according to the present embodiment includes a first cooler, a second cooler, and a temperature controller. The first cooler includes a first placing portion that can place a central portion of a semiconductor substrate thereon, and cools the central portion by heat exchange with the first placing portion. The second cooler includes a second placing portion that can place a peripheral portion of the semiconductor substrate thereon in a periphery of the first placing portion, and cools the peripheral portion. The temperature controller controls a temperature of the second placing portion to be lower than a temperature of the semiconductor substrate and to be higher than a temperature of the first placing portion.
    Type: Application
    Filed: September 14, 2016
    Publication date: September 14, 2017
    Applicant: Toshiba Memory Corporation
    Inventor: Tatsumi USAMI
  • Publication number: 20110272021
    Abstract: A manufacturing method of a solar cell including a transparent conductive film formed on a transparent substrate includes the steps of: preparing a target, the target including ZnO and a material including a substance including an Al or a Ga, the ZnO being a primary component of the target; in a first atmosphere including a process gas, applying a sputter electric voltage to the target and forming a first layer included in the transparent conductive film; in a second atmosphere including a greater amount of an oxygen gas compared to the first atmosphere, applying a sputter electric voltage to the target and forming a second layer on the first layer, the second layer being included in the transparent conductive film; and forming an irregular shape by performing an etching process on the transparent conductive film.
    Type: Application
    Filed: January 21, 2010
    Publication date: November 10, 2011
    Applicant: ULVAC, INC.
    Inventors: Hirohisa Takahashi, Satoru Ishibashi, Tatsumi Usami, Masanori Shirai, Michio Akiyama