Patents by Inventor Masayuki Mafune

Masayuki Mafune 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: 11587797
    Abstract: A semiconductor device includes a metal base plate, a case component, and a metal component. The metal component is fixed to the case component. A partial region of the metal component is exposed from the case component. The partial region is bonded to the base plate in a bonding portion. In the bonding portion, a surface of the partial region and a surface of the base plate are in direct contact with each other and integrated.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: February 21, 2023
    Assignee: Mitsubishi Electric Corporation
    Inventor: Masayuki Mafune
  • Publication number: 20220301956
    Abstract: A semiconductor device includes: an insulating resin; a metal pattern provided on the insulating resin; a semiconductor chip jointed to the metal pattern; a case bonded on the insulating resin and surrounding the semiconductor chip; a sealing material sealing the semiconductor chip inside the case; and a cover provided on an upper part of the case and covering the semiconductor chip and the sealing material, wherein a groove having a V-shaped cross-section is provided on the cover.
    Type: Application
    Filed: October 5, 2021
    Publication date: September 22, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventor: Masayuki MAFUNE
  • Publication number: 20200161145
    Abstract: A semiconductor device includes a metal base plate, a case component, and a metal component. The metal component is fixed to the case component. A partial region of the metal component is exposed from the case component. The partial region is bonded to the base plate in a bonding portion. In the bonding portion, a surface of the partial region and a surface of the base plate are in direct contact with each other and integrated.
    Type: Application
    Filed: September 25, 2019
    Publication date: May 21, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventor: Masayuki MAFUNE
  • Patent number: 10461045
    Abstract: A power semiconductor device including an insulating substrate having a metal layer formed on an upper surface thereof, a semiconductor element and a main electrode bonded to the metal layer, a metal wire connecting the metal layer with the semiconductor element, a metal member bonded to a lower surface side of the insulating substrate, a case member surrounding the insulating substrate and being in contact with a surface of the metal member bonded to the insulating substrate, and a sealing resin which fills a region surrounded by the metal member and the case member and has a resin strength of 0.12 MPa or higher at room temperature, a microcrystallization temperature of ?55° C. or lower, and a needle penetration of 30 to 50 after storage at 175° C. for 1000 hours and seals the insulating substrate, the metal layer, the semiconductor element, the metal wire, and the main electrode.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: October 29, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasumichi Hatanaka, Kozo Harada, Hiroyuki Harada, Takashi Nishimura, Masayuki Mafune, Koji Yamada
  • Publication number: 20190267331
    Abstract: A power semiconductor device including an insulating substrate having a metal layer formed on an upper surface thereof, a semiconductor element and a main electrode bonded to the metal layer, a metal wire connecting the metal layer with the semiconductor element, a metal member bonded to a lower surface side of the insulating substrate, a case member surrounding the insulating substrate and being in contact with a surface of the metal member bonded to the insulating substrate, and a sealing resin which fills a region surrounded by the metal member and the case member and has a resin strength of 0.12 MPa or higher at room temperature, a microcrystallization temperature of ?55° C. or lower, and a needle penetration of 30 to 50 after storage at 175° C. for 1000 hours and seals the insulating substrate, the metal layer, the semiconductor element, the metal wire, and the main electrode.
    Type: Application
    Filed: July 1, 2016
    Publication date: August 29, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yasumichi HATANAKA, Kozo Harada, Hiroyuki Harada, Takashi Nishimura, Masayuki Mafune, Koji Yamada