Patents by Inventor Tatsuya Karasawa

Tatsuya Karasawa 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: 20240304525
    Abstract: A method includes electrically connecting first and second semiconductor elements to conductive plates, respectively, on the front surface of one or more insulating substrates disposed on a metal base; disposing, on the base, a case including a chassis, a first lead frame having a first wiring part extending in a wired direction parallel to the front surface, and a second lead frame having a second wiring part in the wiring direction to overlap the first wiring part with gap that are integrally molded together; and attaching one or more insulating members that include a clamping part sandwiching the first and second wiring parts from the rear surface of the first wiring part and the front surface of the second wiring part in an attachment area thereof and a wiring gap part filling the gap in the attachment area, before joining the lead frames to circuit patterns, respectively.
    Type: Application
    Filed: January 29, 2024
    Publication date: September 12, 2024
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Tatsuya KARASAWA
  • Patent number: 11177236
    Abstract: A semiconductor device includes a circuit board including an insulating layer having opposite front and rear surfaces, an electrode pad disposed on the front surface, a housing having an installation area for the circuit board, and a bonding material embedded in a recess within either a first area located at the rear surface of the insulating layer directly below an area of the circuit board in which the electrode pad is disposed, or at a second area located within the installation area of the housing and corresponding to the first area in a plan view.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: November 16, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Tatsuya Karasawa
  • Publication number: 20200126947
    Abstract: A semiconductor device includes a circuit board including an insulating layer having opposite front and rear surfaces, an electrode pad disposed on the front surface, a housing having an installation area for the circuit board, and a bonding material embedded in a recess within either a first area located at the rear surface of the insulating layer directly below an area of the circuit board in which the electrode pad is disposed, or at a second area located within the installation area of the housing and corresponding to the first area in a plan view.
    Type: Application
    Filed: August 28, 2019
    Publication date: April 23, 2020
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Tatsuya KARASAWA
  • Patent number: 10381243
    Abstract: A semiconductor module in which no crack of a metal film exists in a terminal is provided. A semiconductor module is provided, including: a semiconductor element; a terminal with a metal film formed on a surface and including a bent portion; a resin case to which the terminal is fixed and in which a through hole is formed opposite to the terminal, the resin case housing a semiconductor element; a fastening portion provided inside the through hole; and a supporting portion provided inside the through hole and supporting the fastening portion.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: August 13, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Tatsuya Karasawa
  • Publication number: 20180076053
    Abstract: A semiconductor module in which no crack of a metal film exists in a terminal is provided. A semiconductor module is provided, including: a semiconductor element; a terminal with a metal film formed on a surface and including a bent portion; a resin case to which the terminal is fixed and in which a through hole is formed opposite to the terminal, the resin case housing a semiconductor element; a fastening portion provided inside the through hole; and a supporting portion provided inside the through hole and supporting the fastening portion.
    Type: Application
    Filed: July 26, 2017
    Publication date: March 15, 2018
    Inventor: Tatsuya KARASAWA
  • Patent number: 9832903
    Abstract: Second fixation portions of a terminal conversion adaptor are fitted into and engaged with engagement portions abutting on first fixation portions of a power semiconductor module. By use of one common fixation screw, each of the fixation portions and each of the second fixation portions are fixed to a cooler. Pin connection type external connection terminals of the power semiconductor module are connected to conversion terminals (which are provided with screw connection portions) of the terminal conversion adaptor so that the pin connection type external connection terminals can be converted into screw connection. Thus, it is possible to provide a conversion adaptor which can convert a connection form of each external connection terminal of a power semiconductor module easily and a power semiconductor module device in which the connection form of the external connection terminal can be converted into a desired connection form by the conversion adaptor.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: November 28, 2017
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Tatsuya Karasawa
  • Publication number: 20160095244
    Abstract: Second fixation portions of a terminal conversion adaptor are fitted into and engaged with engagement portions abutting on first fixation portions of a power semiconductor module. By use of one common fixation screw, each of the fixation portions and each of the second fixation portions are fixed to a cooler. Pin connection type external connection terminals of the power semiconductor module are connected to conversion terminals (which are provided with screw connection portions) of the terminal conversion adaptor so that the pin connection type external connection terminals can be converted into screw connection. Thus, it is possible to provide a conversion adaptor which can convert a connection form of each external connection terminal of a power semiconductor module easily and a power semiconductor module device in which the connection form of the external connection terminal can be converted into a desired connection form by the conversion adaptor.
    Type: Application
    Filed: August 28, 2015
    Publication date: March 31, 2016
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Tatsuya KARASAWA
  • Patent number: 8994164
    Abstract: A semiconductor device includes an insulating substrate having a semiconductor element mounted thereon; an outer case accommodating the insulating substrate; and a metallic terminal bar disposed above the insulating substrate and fixed to side walls of the outer case at both ends thereof. Each of both ends of the terminal bar at a position close to the side wall of the outer case at a surface on an opposite side to a surface facing the insulating substrate is provided with a pressed groove.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: March 31, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Hideaki Takahashi, Tatsuya Karasawa, Yo Sakamoto
  • Publication number: 20140246769
    Abstract: A semiconductor device includes an insulating substrate having a semiconductor element mounted thereon; an outer case accommodating the insulating substrate; and a metallic terminal bar disposed above the insulating substrate and fixed to side walls of the outer case at both ends thereof. Each of both ends of the terminal bar at a position close to the side wall of the outer case at a surface on an opposite side to a surface facing the insulating substrate is provided with a pressed groove.
    Type: Application
    Filed: September 12, 2012
    Publication date: September 4, 2014
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Hideaki Takahashi, Tatsuya Karasawa, Yo Sakamoto
  • Patent number: D724554
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: March 17, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Satoru Motohashi, Hideaki Takahashi, Tatsuya Karasawa, Kenshi Terashima