Patents by Inventor Tomohiro HIEDA

Tomohiro HIEDA 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: 10790242
    Abstract: According to the present invention, a semiconductor device includes a substrate having a metallic pattern formed on a top surface of the substrate, a semiconductor chip provided on the metallic pattern, a back surface electrode terminal in flat plate form connected to the metallic pattern with a wire, a front surface electrode terminal in flat plate form, the front surface electrode terminal being in parallel to the back surface electrode terminal above the back surface electrode terminal, extending immediately above the semiconductor chip, and being directly joined to a top surface of the semiconductor chip, a case surrounding the substrate and a seal material for sealing an inside of the case.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: September 29, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tetsuo Yamashita, Tomohiro Hieda, Masaomi Miyazawa
  • Patent number: 10564048
    Abstract: According to the present invention, a semiconductor device includes a semiconductor chip, resistance of which changes in accordance with temperature, an external resistor connected in series with the semiconductor chip and a detector configured to detect, while a first voltage is applied between both ends of a series circuit formed by the semiconductor chip and the external resistor, a second voltage applied between both ends of the external resistor, wherein the detector calculates a temperature of the semiconductor chip from the second voltage.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: February 18, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tetsuo Yamashita, Tomohiro Hieda, Hiroki Muraoka, Mituharu Tabata, Koichi Masuda
  • Publication number: 20200011743
    Abstract: According to the present invention, a semiconductor device includes a semiconductor chip, resistance of which changes in accordance with temperature, an external resistor connected in series with the semiconductor chip and a detector configured to detect, while a first voltage is applied between both ends of a series circuit formed by the semiconductor chip and the external resistor, a second voltage applied between both ends of the external resistor, wherein the detector calculates a temperature of the semiconductor chip from the second voltage.
    Type: Application
    Filed: February 8, 2019
    Publication date: January 9, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tetsuo YAMASHITA, Tomohiro HIEDA, Hiroki MURAOKA, Mituharu TABATA, Koichi MASUDA
  • Publication number: 20190244913
    Abstract: According to the present invention, a semiconductor device includes a substrate having a metallic pattern formed on a top surface of the substrate, a semiconductor chip provided on the metallic pattern, a back surface electrode terminal in flat plate form connected to the metallic pattern with a wire, a front surface electrode terminal in flat plate form, the front surface electrode terminal being in parallel to the back surface electrode terminal above the back surface electrode terminal, extending immediately above the semiconductor chip, and being directly joined to a top surface of the semiconductor chip, a case surrounding the substrate and a seal material for sealing an inside of the case.
    Type: Application
    Filed: April 16, 2019
    Publication date: August 8, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tetsuo YAMASHITA, Tomohiro HIEDA, Masaomi MIYAZAWA
  • Patent number: 10347593
    Abstract: According to the present invention, a semiconductor device includes a substrate having a metallic pattern formed on a top surface of the substrate, a semiconductor chip provided on the metallic pattern, a back surface electrode terminal in flat plate form connected to the metallic pattern with a wire, a front surface electrode terminal in flat plate form, the front surface electrode terminal being in parallel to the back surface electrode terminal above the back surface electrode terminal, extending immediately above the semiconductor chip, and being directly joined to a top surface of the semiconductor chip, a case surrounding the substrate and a seal material for sealing an inside of the case.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: July 9, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tetsuo Yamashita, Tomohiro Hieda, Masaomi Miyazawa
  • Publication number: 20180301421
    Abstract: According to the present invention, a semiconductor device includes a substrate having a metallic pattern formed on a top surface of the substrate, a semiconductor chip provided on the metallic pattern, a back surface electrode terminal in flat plate form connected to the metallic pattern with a wire, a front surface electrode terminal in flat plate form, the front surface electrode terminal being in parallel to the back surface electrode terminal above the back surface electrode terminal, extending immediately above the semiconductor chip, and being directly joined to a top surface of the semiconductor chip, a case surrounding the substrate and a seal material for sealing an inside of the case.
    Type: Application
    Filed: December 14, 2017
    Publication date: October 18, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tetsuo YAMASHITA, Tomohiro HIEDA, Masaomi MIYAZAWA
  • Patent number: 9721861
    Abstract: A semiconductor device includes a semiconductor element and a ceramic circuit substrate on which the semiconductor element is mounted. The ceramic circuit substrate includes a ceramic substrate having one surface and the other surface facing each other, a metal circuit board joined to the one surface of the ceramic substrate and electrically connected to the semiconductor element, and a metal heat-dissipation plate joined to the other surface of the ceramic substrate. The metal circuit board is greater in thickness than the metal heat-dissipation plate. A surface of the metal heat-dissipation plate on a side opposite to the ceramic substrate is larger in area than a surface of the metal circuit board on a side opposite to the ceramic substrate. Thereby, a semiconductor device capable of suppressing warpage of the ceramic substrate can be achieved.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: August 1, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshitaka Otsubo, Takuya Takahashi, Masaomi Miyazawa, Tetsuo Yamashita, Tomohiro Hieda, Mituharu Tabata
  • Publication number: 20160095213
    Abstract: A semiconductor device includes a semiconductor element and a ceramic circuit substrate on which the semiconductor element is mounted. The ceramic circuit substrate includes a ceramic substrate having one surface and the other surface facing each other, a metal circuit board joined to the one surface of the ceramic substrate and electrically connected to the semiconductor element, and a metal heat-dissipation plate joined to the other surface of the ceramic substrate. The metal circuit board is greater in thickness than the metal heat-dissipation plate. A surface of the metal heat-dissipation plate on a side opposite to the ceramic substrate is larger in area than a surface of the metal circuit board on a side opposite to the ceramic substrate. Thereby, a semiconductor device capable of suppressing warpage of the ceramic substrate can be achieved.
    Type: Application
    Filed: April 15, 2015
    Publication date: March 31, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshitaka OTSUBO, Takuya TAKAHASHI, Masaomi MIYAZAWA, Tetsuo YAMASHITA, Tomohiro HIEDA, Mituharu TABATA