Patents by Inventor Kozo Harada

Kozo Harada 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: 20240072026
    Abstract: A semiconductor device according to the present disclosure includes: a semiconductor element; a plurality of conductive members each electrically connected to the semiconductor element and each extending upward; a sealing resin to seal the semiconductor element and the conductive member and to form a protrusion that covers a perimeter of a tip portion of each of the plurality of conductive members; a control substrate provided with a through hole into which the protrusion is inserted, the control substrate having a control electrode; and a flexible wiring to connect the control electrode and the tip portion of the conductive member to each other, the flexible wiring having flexibility. With such a configuration, a trouble due to external force or stress applied to the semiconductor device or the semiconductor package can be prevented and the semiconductor device or the semiconductor package having an excellent durability can be obtained.
    Type: Application
    Filed: January 15, 2021
    Publication date: February 29, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kazutake KADOWAKI, Kozo HARADA, Hodaka ROKUBUICHI
  • Patent number: 11916001
    Abstract: A semiconductor power module includes a base plate, an insulating substrate, a power semiconductor element, an external terminal, a main terminal, a connected body, a case, a highly-insulating voltage-resisting resin material, a sealing resin, and a cover. The main terminal is connected to the connected body. The connected body is directly joined to the metal plate. The connected body is provided with a receiving section in which the main terminal is received. The receiving section is provided with a slit portion. The slit portion extends from a lower end side of the receiving section toward an upper end side thereof. The lower end side is located on a side close to the insulating substrate. The upper end side is located opposite to the side close to the insulating substrate.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: February 27, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Kozo Harada
  • Publication number: 20240055357
    Abstract: A semiconductor package includes a semiconductor element, a first insulating layer, a first wiring layer, a second insulating layer, and a second wiring layer. The first insulating layer covers the semiconductor element. The first wiring layer includes a first layer section. The first layer section covers the first insulating layer. The second insulating layer covers the first insulating layer and the first wiring layer. The second wiring layer is electrically connected to the semiconductor element through a second through hole and a third through hole. The second wiring layer includes a second layer section. The second layer section covers the second insulating layer. The second layer section of the second wiring layer has a portion overlying the first layer section of the first wiring layer with the second insulating layer interposed.
    Type: Application
    Filed: October 29, 2020
    Publication date: February 15, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kozo HARADA, Hodaka ROKUBUICHI
  • Patent number: 11855033
    Abstract: The conductive wire is bonded to the front electrode of the semiconductor device at the bonding section. The first resin member covers at least one end portion of two end portions of the bonding section, the first surface of the front electrode, and the second surface of the conductive wire. The second resin member covers the bent portion of the first resin member. The first resin member has a higher break elongation and a higher break strength than the second resin member. The second tensile elastic modulus of the second resin member is greater than the first tensile elastic modulus of the first resin member. Thereby, the reliability of the power semiconductor module is improved.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: December 26, 2023
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Haruko Hitomi, Kozo Harada, Ken Sakamoto
  • Publication number: 20230271579
    Abstract: A power conversion apparatus includes a hermetic housing, a power semiconductor module, and dry gas. The hermetic housing includes a gas inlet valve and a gas outlet valve. The power semiconductor module is arranged in an internal space in the hermetic housing. The internal space in the hermetic housing is filled with dry gas.
    Type: Application
    Filed: September 7, 2020
    Publication date: August 31, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Junichi NAKASHIMA, Kenji FUJIWARA, Kozo HARADA, Kunihiko TAJIRI, Yuji SHIRAKATA
  • Publication number: 20230105637
    Abstract: The power module includes: a heat spreader having a plate shape and having heat conducting property; a semiconductor element at least thermally connected to a one-side surface of the heat spreader; a highly-heat-dissipating insulation adhesive sheet having a plate shape and having a one-side surface thermally connected to an other-side surface of the heat spreader; a metal plate having a one-side surface thermally connected to an other-side surface of the highly-heat-dissipating insulation adhesive sheet; and a sealing resin member sealing the semiconductor element, the heat spreader, the highly-heat-dissipating insulation adhesive sheet, and the metal plate in a state where an other-side surface of the metal plate is exposed, wherein the highly-heat-dissipating insulation adhesive sheet is a complex obtained by impregnating, with a resin, a porous ceramic sintered body in which ceramic particles have a gap and have been integrally sintered.
    Type: Application
    Filed: March 29, 2022
    Publication date: April 6, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tomohisa YAMANE, Kei YAMAMOTO, Kozo HARADA, Masaki TAYA, Yo TANAKA, Kazuhiro TADA
  • Publication number: 20230024580
    Abstract: A semiconductor module includes a first power semiconductor device, a conductive wire, and a resin film. The conductive wire is joined to a surface of a first front electrode of the first power semiconductor device. The resin film is formed to be continuous on at least one of an end portion or an end portion of a first joint between the first front electrode and the conductive wire in a longitudinal direction of the conductive wire, a surface of the first front electrode, and a surface of the conductive wire. The resin film has an elastic elongation rate of 4.5% to 10.0%.
    Type: Application
    Filed: February 6, 2020
    Publication date: January 26, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Ken SAKAMOTO, Haruko HITOMI, Kozo HARADA, Seiki HIRAMATSU
  • Publication number: 20220415735
    Abstract: A power module includes an insulating substrate, a case member, a power semiconductor element, a base member, a sealing member, and an adhesive member. The insulating substrate has a first surface and a second surface opposite to the first surface. The case member surrounds the insulating substrate when viewed in a direction perpendicular to the first surface. The power semiconductor element faces the first surface. The base member faces the second surface. The sealing member seals the power semiconductor element and the insulating substrate and is in contact with the case member. The adhesive member fixes the base member and the case member, and surrounds the insulating substrate when viewed in the direction perpendicular to the first surface.
    Type: Application
    Filed: January 17, 2020
    Publication date: December 29, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kozo HARADA, Ken SAKAMOTO, Yoshihiro YAMAGUCHI
  • Publication number: 20220336402
    Abstract: A semiconductor device includes a semiconductor element, at least one first resin member, and at least one conducting wire. The semiconductor element includes a front electrode and a body part. The at least one first resin member is disposed on a second surface of the front electrode. The at least one conducting wire includes a joining part. The at least one first resin member includes a convex part. The convex part protrudes from the front electrode in a direction away from the body part. The at least one conducting wire includes a concave part. The concave part is adjacent to the joining part. The concave part extends along the convex part. The concave part is fitted to the convex part.
    Type: Application
    Filed: December 4, 2019
    Publication date: October 20, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Haruko HITOMI, Kozo HARADA, Ken SAKAMOTO
  • Publication number: 20220165700
    Abstract: The conductive wire is bonded to the front electrode of the semiconductor device at the bonding section. The first resin member covers at least one end portion of two end portions of the bonding section, the first surface of the front electrode, and the second surface of the conductive wire. The second resin member covers the bent portion of the first resin member. The first resin member has a higher break elongation and a higher break strength than the second resin member. The second tensile elastic modulus of the second resin member is greater than the first tensile elastic modulus of the first resin member. Thereby, the reliability of the power semiconductor module is improved.
    Type: Application
    Filed: May 30, 2019
    Publication date: May 26, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Haruko HITOMI, Kozo HARADA, Ken SAKAMOTO
  • Patent number: 11031355
    Abstract: A semiconductor device includes an insulating substrate having a main surface, a semiconductor element, a case member, and a sealing resin as a sealing material. The case member includes a recess that is continuous with a connection portion of the case member connected to the insulating substrate, and that faces the internal region. The recess includes a facing surface as an inner wall portion facing the main surface of the insulating substrate. A distance from the main surface of the insulating substrate to the facing surface as the inner wall portion is greater than a distance from the main surface to an upper surface of the semiconductor element.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: June 8, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yusuke Kaji, Kozo Harada
  • Publication number: 20200395278
    Abstract: A semiconductor power module includes a base plate, an insulating substrate, a power semiconductor element, an external terminal, a main terminal, a connected body, a case, a highly-insulating voltage-resisting resin material, a sealing resin, and a cover. The main terminal is connected to the connected body. The connected body is directly joined to the metal plate. The connected body is provided with a receiving section in which the main terminal is received. The receiving section is provided with a slit portion. The slit portion extends from a lower end side of the receiving section toward an upper end side thereof. The lower end side is located on a side close to the insulating substrate. The upper end side is located opposite to the side close to the insulating substrate.
    Type: Application
    Filed: December 13, 2018
    Publication date: December 17, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventor: Kozo HARADA
  • Patent number: 10801085
    Abstract: A high-strength steel sheet having high yield ratio, excellent stretch flange formability, and resistance to secondary working embrittlement. The steel sheet has a composition containing C: 0.02% to less than 0.10%, Si: less than 0.3%, Mn: less than 1.0%, P: 0.10% or less, S: 0.020% or less, Al: 0.01% to 0.10%, N: 0.010% or less, and Nb: 0.003% to less than 0.070% on a mass basis, the remainder being Fe and inevitable impurities. A steel microstructure of the steel sheet contains ferrite: 90% or more and a total of pearlite, martensite, retained austenite, and cementite: 0% to 10% on an area fraction basis, in which the average grain size of the ferrite is 15.0 ?m or less, and in which the average aspect ratio of the ferrite is 1.2 or more; and a tensile strength of 500 MPa or less.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: October 13, 2020
    Assignee: JFE STEEL CORPORATION
    Inventors: Yuma Honda, Yoshimasa Funakawa, Kozo Harada
  • Publication number: 20200286840
    Abstract: A semiconductor device includes an insulating substrate having a main surface, a semiconductor element, a case member, and a sealing resin as a sealing material. The case member includes a recess that is continuous with a connection portion of the case member connected to the insulating substrate, and that faces the internal region. The recess includes a facing surface as an inner wall portion facing the main surface of the insulating substrate. A distance from the main surface of the insulating substrate to the facing surface as the inner wall portion is greater than a distance from the main surface to an upper surface of the semiconductor element.
    Type: Application
    Filed: March 8, 2018
    Publication date: September 10, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yusuke KAJI, Kozo HARADA
  • Patent number: 10727145
    Abstract: A semiconductor device including: an insulating substrate having a conductor layer on the upper face and the lower face and a semiconductor element mounted on the upper conductor layer; a base plate bonded to the lower conductor layer; a case member surrounding the insulating substrate and bonded to the surface of the base plate to which the conductor layer bonded to the lower face; a first filler being a silicone composition filled in a region surrounded by the base plate and the case member; and a second filler being injected into a region below the first filler and surrounding a peripheral edge portion of the insulating substrate, whose height from the base plate is higher than the upper face and is lower than a bonding face between the semiconductor element and the upper conductor layer.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: July 28, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroyuki Harada, Kozo Harada, Hiroki Shiota, Yoshihiro Yamaguchi, Koji Yamada
  • Patent number: 10720368
    Abstract: A semiconductor device includes: an insulating substrate having an upper surface on which a semiconductor element is mounted; a base plate joined to a lower surface of the insulating substrate; a case member that surrounds the insulating substrate and that is in contact with a surface of the base plate to which the insulating substrate is joined; a sealing resin provided in a region surrounded by the base plate and the case member; a cover member facing a surface of the sealing resin and fixed to the case member; and a holding plate, a lower surface of the holding plate and a portion of a side surface of the holding plate being in close contact with the surface of the sealing resin, an upper surface of the holding plate being fixed to and protruding from a surface of the cover member facing the surface of the sealing resin.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: July 21, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroyuki Harada, Kozo Harada, Yasumichi Hatanaka, Takashi Nishimura, Masaki Taya
  • Patent number: 10714415
    Abstract: Even when a stiffener is omitted, the semiconductor device which can prevent the generation of twist and distortion of a wiring substrate is obtained. As for a semiconductor device which has a wiring substrate, a semiconductor chip by which the flip chip bond was made to the wiring substrate, and a heat spreader adhered to the back surface of the semiconductor chip, and which omitted the stiffener for reinforcing a wiring substrate and maintaining the surface smoothness of a heat spreader, a wiring substrate has a plurality of insulating substrates in which a through hole whose diameter differs, respectively was formed, and each insulating substrate contains a glass cloth.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: July 14, 2020
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Eiji Hayashi, Kyo Go, Kozo Harada, Shinji Baba
  • Patent number: 10655194
    Abstract: A high-strength steel sheet having a high yield ratio and excellent stretch flangeability, and a method for producing the high-strength steel sheet. The high-strength steel sheet has a composition containing, by mass: C: 0.02% or more and less than 0.10%, Si: less than 0.10%, Mn: less than 1.0%, P: 0.10% or less, S: 0.020% or less, Al: 0.01% or more and 0.10% or less, N: 0.010% or less, Nb: 0.005% or more and less than 0.070%, and the balance being Fe and inevitable impurities; and a microstructure including, by area: ferrite: 85% or more, pearlite: 0% to 15%, and a total of martensite, retained austenite and cementite: 0% to 3%. The average crystal grain diameter of the ferrite is 15.0 ?m or less. The grain diameter of a Nb carbide is 5 to 50 nm. The amount of Nb carbide precipitate is 0.005% to 0.050% in terms of volume fraction.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: May 19, 2020
    Assignee: JFE STEEL CORPORATION
    Inventors: Yuma Honda, Yoshimasa Funakawa, Kozo Harada
  • Publication number: 20190371686
    Abstract: A semiconductor device includes: an insulating substrate having an upper surface on which a semiconductor element is mounted; a base plate joined to a lower surface of the insulating substrate; a case member that surrounds the insulating substrate and that is in contact with a surface of the base plate to which the insulating substrate is joined; a sealing resin provided in a region surrounded by the base plate and the case member; a cover member facing a surface of the sealing resin and fixed to the case member; and a holding plate, a lower surface of the holding plate and a portion of a side surface of the holding plate being in close contact with the surface of the sealing resin, an upper surface of the holding plate being fixed to and protruding from a surface of the cover member facing the surface of the sealing resin.
    Type: Application
    Filed: December 14, 2016
    Publication date: December 5, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroyuki HARADA, Kozo HARADA, Yasumichi HATANAKA, Takashi NISHIMURA, Masaki TAYA
  • Patent number: 10494693
    Abstract: A high-strength steel sheet having a high yield ratio and a reduced difference in strength between the center and edges of the steel sheet in the width direction. The high-strength steel sheet includes a composition containing, by mass, C: 0.02% or more and less than 0.10%, Si: less than 0.10%, Mn: less than 1.0%, P: 0.10% or less, S: 0.020% or less, Al: 0.01% or more and 0.10% or less, N: 0.010% or less, Nb: 0.005% or more and less than 0.070%, and the balance being Fe and inevitable impurities. Additionally, the steel sheet has a microstructure including, by area, ferrite: 90% or more, pearlite: 0% to 10%, and the total of martensite, retained austenite, and cementite: 0% to 3%. The average crystal grain diameter dC of the ferrite at the center of the steel sheet in the width direction is 15.0 ?m or less.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: December 3, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Yuma Honda, Yoshimasa Funakawa, Kozo Harada