Patents by Inventor Nobuhiro ASAJI

Nobuhiro ASAJI 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: 11742251
    Abstract: A power semiconductor device includes: a power semiconductor element; a control circuit that controls the power semiconductor element; a control substrate having the control circuit mounted thereon; a lid arranged to overlap with at least a portion of the control substrate in a first direction; and at least one external connection terminal having a first portion connected with the control substrate, a second portion to be connected with an external apparatus, and a third portion located between the first portion and the second portion and fixed to the lid, the first portion being constituted as a press-fit portion.
    Type: Grant
    Filed: August 14, 2020
    Date of Patent: August 29, 2023
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hidetoshi Ishibashi, Yoshitaka Kimura, Minoru Egusa, Nobuhiro Asaji, Kazunari Teshigawara
  • Publication number: 20220415738
    Abstract: A power semiconductor device in which the size of an insulating substrate is reduced and connection failure can be suppressed includes an insulating substrate, a semiconductor element, and a printed circuit board. The semiconductor element is bonded to one main surface of the insulating substrate. The printed circuit board is bonded to face the semiconductor element. The semiconductor element has a main electrode and a signal electrode. The printed circuit board includes a core member, a first conductor layer, and a second conductor layer. The second conductor layer has a bonding pad. The printed circuit board has a missing portion. A metal column portion is arranged to pass through the inside of the missing portion and reach the insulating substrate. The signal electrode and the bonding pad are connected by a metal wire. The metal column portion and the insulating substrate are bonded.
    Type: Application
    Filed: November 18, 2020
    Publication date: December 29, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Nobuhiro ASAJI, Kazuya OKADA, Hidetoshi ISHIBASHI
  • Patent number: 11424178
    Abstract: A semiconductor module includes: an insulated circuit board; a semiconductor device mounted on the insulated circuit board; a printed wiring board arranged above the insulated circuit board and the semiconductor device and having a through-hole; a metal pile having a lower end bonded to an upper surface of the semiconductor device and a cylindrical portion penetrating through the through-hole and bonded to the printed wiring board; a case surrounding the insulated circuit board, the semiconductor device, the printed wiring board and the metal pile; and a sealing material sealing an inside of the case.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: August 23, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoshi Kondo, Hidetoshi Ishibashi, Hiroshi Yoshida, Nobuhiro Asaji, Junji Fujino, Yusuke Ishiyama, Hodaka Rokubuichi
  • Patent number: 11270982
    Abstract: A metal mask is disposed on a copper base plate. A solder paste is introduced into each of a plurality of openings in the metal mask, to thereby form a pattern of the solder paste on each of copper plates of the copper base plate. A semiconductor element and a conductive component are placed on the respective patterns of the solder pastes. A metal mask is disposed on the copper base plate. Then, a solder paste is introduced into each of a plurality of openings in the metal mask, to thereby form a pattern of the solder paste covering each of the semiconductor element and the conductive component. A large-capacity relay board is disposed so as to come into contact with a corresponding pattern of the solder paste. A power semiconductor device is completed by performing heat treatment under a temperature condition of 200° C. or higher.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: March 8, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Norikazu Sakai, Hiroshi Yoshida, Hidetoshi Ishibashi, Nobuhiro Asaji
  • Publication number: 20210134686
    Abstract: A power semiconductor device includes: a power semiconductor element; a control circuit that controls the power semiconductor element; a control substrate having the control circuit mounted thereon; a lid arranged to overlap with at least a portion of the control substrate in a first direction; and at least one external connection terminal having a first portion connected with the control substrate, a second portion to be connected with an external apparatus, and a third portion located between the first portion and the second portion and fixed to the lid, the first portion being constituted as a press-fit portion.
    Type: Application
    Filed: August 14, 2020
    Publication date: May 6, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hidetoshi Ishibashi, Yoshitaka Kimura, Minoru Egusa, Nobuhiro Asaji, Kazunari Teshigawara
  • Publication number: 20210066175
    Abstract: A semiconductor module includes: an insulated circuit board; a semiconductor device mounted on the insulated circuit board; a printed wiring board arranged above the insulated circuit board and the semiconductor device and having a through-hole; a metal pile having a lower end bonded to an upper surface of the semiconductor device and a cylindrical portion penetrating through the through-hole and bonded to the printed wiring board; a case surrounding the insulated circuit board, the semiconductor device, the printed wiring board and the metal pile; and a sealing material sealing an inside of the case.
    Type: Application
    Filed: April 9, 2020
    Publication date: March 4, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Satoshi KONDO, Hidetoshi ISHIBASHI, Hiroshi YOSHIDA, Nobuhiro ASAJI, Junji FUJINO, Yusuke ISHIYAMA, Hodaka ROKUBUICHI
  • Publication number: 20190348404
    Abstract: A metal mask is disposed on a copper base plate. A solder paste is introduced into each of a plurality of openings in the metal mask, to thereby form a pattern of the solder paste on each of copper plates of the copper base plate. A semiconductor element and a conductive component are placed on the respective patterns of the solder pastes. A metal mask is disposed on the copper base plate. Then, a solder paste is introduced into each of a plurality of openings in the metal mask, to thereby form a pattern of the solder paste covering each of the semiconductor element and the conductive component. A large-capacity relay board is disposed so as to come into contact with a corresponding pattern of the solder paste. A power semiconductor device is completed by performing heat treatment under a temperature condition of 200° C. or higher.
    Type: Application
    Filed: January 30, 2017
    Publication date: November 14, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Norikazu SAKAI, Hiroshi YOSHIDA, Hidetoshi ISHIBASHI, Nobuhiro ASAJI
  • Patent number: 10204886
    Abstract: A semiconductor device includes semiconductor chips fixed to a board, an insulating plate having a through-hole formed therein, a first lower conductor including a lower main body formed on the lower surface of the insulating plate and soldered to any of the semiconductor chips, and a lower protrusion portion that connects with the lower main body, and extends to the outside of the insulating plate, a second lower conductor formed on a lower surface of the insulating plate and soldered to any of the semiconductor chips, an upper conductor including an upper main body formed on the upper surface of the insulating plate, and an upper protrusion portion that connects with the upper main body and extends to the outside of the insulating plate, and a connection portion provided in the through-hole and connects the upper main body and the second lower conductor.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: February 12, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroshi Yoshida, Yuji Imoto, Hidetoshi Ishibashi, Daisuke Murata, Kenta Nakahara, Seiji Oka, Junji Fujino, Nobuhiro Asaji
  • Publication number: 20180294253
    Abstract: A semiconductor device includes semiconductor chips fixed to a board, an insulating plate having a through-hole formed therein, a first lower conductor including a lower main body formed on the lower surface of the insulating plate and soldered to any of the semiconductor chips, and a lower protrusion portion that connects with the lower main body, and extends to the outside of the insulating plate, a second lower conductor formed on a lower surface of the insulating plate and soldered to any of the semiconductor chips, an upper conductor including an upper main body formed on the upper surface of the insulating plate, and an upper protrusion portion that connects with the upper main body and extends to the outside of the insulating plate, and a connection portion provided in the through-hole and connects the upper main body and the second lower conductor.
    Type: Application
    Filed: January 29, 2016
    Publication date: October 11, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroshi YOSHIDA, Yuji IMOTO, Hidetoshi ISHIBASHI, Daisuke MURATA, Kenta NAKAHARA, Seiji Oka, Junji FUJINO, Nobuhiro ASAJI