Patents by Inventor Seiji Oka

Seiji Oka 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: 10068819
    Abstract: A relay substrate in which a circuit pattern and an external electrode are integrated on a insulating plate is used in the semiconductor device. Such configuration makes it possible to reduce a resistance in a current path while preventing the problems occurring when the external electrode is soldered on the semiconductor chip.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: September 4, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Oka, Hiroshi Yoshida, Hidetoshi Ishibashi, Yuji Imoto, Daisuke Murata, Kenta Nakahara
  • Publication number: 20180245837
    Abstract: An air conditioner of the present invention includes: a compressor; an outdoor fan; a temperature sensor configured to detect an outside temperature; a memory configured to store the outside temperature detected by the temperature sensor; and a controller configured to conduct holding control of not updating the outside temperature stored in the memory, when the compressor is being driven and the outdoor fan is stopped or is repeatedly started and stopped after the outside temperature detected by the temperature sensor is stored in the memory while the outdoor fan is being driven.
    Type: Application
    Filed: February 27, 2018
    Publication date: August 30, 2018
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takeshi YAMAKAWA, Kengo MURAYAMA, Seiji OKA
  • Publication number: 20180174864
    Abstract: An object is to provide a technology that reduces the number of components and that is capable of suppressing the cost. A structure including semiconductor elements, a plurality of electrode terminals, and a dam bar for connecting the plurality of electrode terminals is prepared, and a part of the structure including a part of the plurality of electrode terminals and the dam bar is arranged in the terminal hole. Further, the part of the structure is clamped by a movable clamp inside the terminal hole, and at least a portion of the movable clamp is fitted into the terminal hole, and then a resin is injected into an internal space of a pair of molds.
    Type: Application
    Filed: October 6, 2015
    Publication date: June 21, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tetsuya UEDA, Hiroshi YOSHIDA, Seiji OKA, Ken SAKAMOTO
  • Publication number: 20170372978
    Abstract: A relay substrate in which a circuit pattern and an external electrode are integrated on a insulating plate is used in the semiconductor device. Such configuration makes it possible to reduce a resistance in a current path while preventing the problems occurring when the external electrode is soldered on the semiconductor chip.
    Type: Application
    Filed: February 13, 2017
    Publication date: December 28, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Seiji OKA, Hiroshi YOSHIDA, Hidetoshi ISHIBASHI, Yuji IMOTO, Daisuke MURATA, Kenta NAKAHARA
  • Patent number: 9287201
    Abstract: A semiconductor device including: a semiconductor element; a lead frame connected to the semiconductor element; a metal base plate mounted on the lead frame via a first insulation layer; and a second insulation layer disposed on the opposite side of the metal base plate face on which the first insulation layer is disposed; wherein the first insulation layer is an insulation layer whose heat-dissipation performance is higher than that of the second insulation layer, and the second insulation layer is an insulation layer whose insulation performance is the same as that of the first insulation layer or higher than that of the first insulation layer.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: March 15, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Shiota, Seiji Oka, Yoshihiro Yamaguchi
  • Patent number: 9196604
    Abstract: A power semiconductor module includes a base plate as a metallic heat dissipating body, a first insulating layer on the base plate, and a first wiring pattern on the first insulating layer. On a predetermined region that is a part of the first wiring pattern, a second wiring pattern for a second layer is laminated via only a second insulating layer made of resin, thereby forming a pattern laminated region. A power semiconductor element is mounted in a region other than the pattern laminated region on the first wiring pattern. The base plate, the first insulating layer, the first wiring pattern, the second insulating layer, the second wiring pattern, and the power semiconductor element are integrally sealed with a transfer mold resin, thus obtaining the power semiconductor module.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: November 24, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshiko Tamada, Seiji Oka
  • Publication number: 20150115288
    Abstract: A power semiconductor module includes a base plate as a metallic heat dissipating body, a first insulating layer on the base plate, and a first wiring pattern on the first insulating layer. On a predetermined region that is a part of the first wiring pattern, a second wiring pattern for a second layer is laminated via only a second insulating layer made of resin, thereby forming a pattern laminated region. A power semiconductor element is mounted in a region other than the pattern laminated region on the first wiring pattern. The base plate, the first insulating layer, the first wiring pattern, the second insulating layer, the second wiring pattern, and the power semiconductor element are integrally sealed with a transfer mold resin, thus obtaining the power semiconductor module.
    Type: Application
    Filed: July 17, 2013
    Publication date: April 30, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoshiko Tamada, Seiji Oka
  • Patent number: 8994165
    Abstract: A power semiconductor device includes power semiconductor elements joined to wiring patterns of a circuit substrate, cylindrical external terminal communication sections, and wiring means for forming electrical connection between, for example, the power semiconductor elements and the cylindrical external terminal communication sections. The power semiconductor elements, the cylindrical external terminal communication sections, and the wiring means are sealed with transfer molding resin. The cylindrical external terminal communication sections are arranged on the wiring patterns so as to be substantially perpendicular to the wiring patterns, such that external terminals are insertable and connectable to the cylindrical external terminal communication sections, and such that a plurality of cylindrical external terminal communication sections among the cylindrical external terminal communication sections are arranged two-dimensionally on each of wiring patterns that act as main circuits.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: March 31, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takeshi Oi, Seiji Oka, Yoshiko Obiraki, Osamu Usui, Yasushi Nakayama
  • Patent number: 8952520
    Abstract: A power semiconductor device with improved productivity, reduced size and reduction of amounting area therefore is provided. In the provided power semiconductor device, an external terminal does not limit an increase in current. The power semiconductor device is sealed with transfer molding resin. In the power semiconductor device, a cylindrical external terminal communication section is arranged on a wiring pattern so as to be substantially perpendicular to the wiring pattern. An external terminal can be inserted and connected to the cylindrical external terminal communication section. The cylindrical external terminal communication section allows the inserted external terminal to be electrically connected to the wiring pattern. A taper is formed at, at least, one end of the cylindrical external terminal communication section, which one end is joined to the wiring pattern.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: February 10, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshiko Obiraki, Seiji Oka, Osamu Usui, Yasushi Nakayama, Takeshi Oi
  • Patent number: 8741695
    Abstract: A semiconductor device includes a metal substrate including a metal base plate, an insulating sheet located on the metal base plate, and a wiring pattern located on the insulating sheet, and a semiconductor element located on the metal substrate. The semiconductor element is sealed with a molding resin. The molding resin extends to side surfaces of the metal substrate. On the side surfaces of the metal substrate, the insulating sheet and the wiring pattern are not exposed from the molding resin, whereas the metal base plate includes a projecting portion exposed from the molding resin.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: June 3, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Oka, Kazuhiro Tada, Hiroshi Yoshida
  • Publication number: 20140035123
    Abstract: A semiconductor device includes: a semiconductor element; a substrate; a metal plate; and a plurality of spherical particles. The substrate has the semiconductor element mounted thereon. The metal plate has one surface and the other surface that face each other, and the substrate is provided on the one surface. The plurality of spherical particles each has a spherical outer shape, and a part of the spherical outer shape is buried in the other surface of the metal plate. With such a configuration, there can be obtained a semiconductor device that allows promotion of heat dissipation from the semiconductor element, and a method for manufacturing the semiconductor device.
    Type: Application
    Filed: March 14, 2013
    Publication date: February 6, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji OKA, Yoshihiro YAMAGUCHI
  • Patent number: 8610261
    Abstract: A power semiconductor device includes a power semiconductor module having cylindrical conductors which are joined to a wiring pattern so as to be substantially perpendicular to the wiring pattern and whose openings are exposed at a surface of transfer molding resin, and an insert case having a ceiling portion and peripheral walls, the ceiling portion being provided with external terminals that are fitted into, and passed through, the ceiling portion, the external terminals having outer-surface-side connecting portions at the outer surface side of the ceiling portion and inner-surface-side connecting portions at the inner surface side of the ceiling portion. The power semiconductor module is set within the insert case such that the inner-surface-side connecting portions of the external terminals are inserted into the cylindrical conductors.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: December 17, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Oka, Yoshiko Obiraki, Takeshi Oi
  • Patent number: 8575745
    Abstract: A power semiconductor device includes a conductive insertion member as an external terminal projecting from a surface of the power semiconductor device facing a printed wiring board. The printed wiring board includes a conductive fitting member mounted on a pad part of the printed wiring board. The fitting member receives the insertion member therein when the power semiconductor device is connected to the printed wiring board. The insertion member has a recessed portion formed on a side surface of the insertion member. The fitting member has a projecting portion with elasticity formed on an inner side surface of the fitting member. The elasticity causes the projecting portion of the fitting member to contact the recessed portion of the insertion member under pressure when the insertion member is inserted into the fitting member.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: November 5, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Oka, Shiori Idaka, Hiroshi Yoshida
  • Publication number: 20130240912
    Abstract: A semiconductor device including: a semiconductor element; a lead frame connected to the semiconductor element; a metal base plate mounted on the lead frame via a first insulation layer; and a second insulation layer disposed on the opposite side of the metal base plate face on which the first insulation layer is disposed; wherein the first insulation layer is an insulation layer whose heat-dissipation performance is higher than that of the second insulation layer, and the second insulation layer is an insulation layer whose insulation performance is the same as that of the first insulation layer or higher than that of the first insulation layer.
    Type: Application
    Filed: December 5, 2011
    Publication date: September 19, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroki Shiota, Seiji Oka, Yoshihiro Yamaguchi
  • Patent number: 8502385
    Abstract: A power semiconductor device has the power semiconductor elements having back surfaces bonded to wiring patterns and surface electrodes, cylindrical communication parts having bottom surfaces bonded on the surface electrodes of the power semiconductor elements and/or on the wiring patterns, a transfer mold resin having concave parts which expose the upper surfaces of the communication parts and cover the insulating layer, the wiring patterns, and the power semiconductor elements. External terminals have one ends inserted in the upper surfaces of the communication parts and the other ends guided upward, and at least one external terminal has, between both end parts, a bent area which is bent in an L shape and is embedded in the concave part of the transfer mold resin.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: August 6, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Oka, Tetsuya Ueda
  • Publication number: 20130181225
    Abstract: A semiconductor device includes a metal substrate including a metal base plate, an insulating sheet located on the metal base plate, and a wiring pattern located on the insulating sheet, and a semiconductor element located on the metal substrate. The semiconductor element is sealed with a molding resin. The molding resin extends to side surfaces of the metal substrate. On the side surfaces of the metal substrate, the insulating sheet and the wiring pattern are not exposed from the molding resin, whereas the metal base plate includes a projecting portion exposed from the molding resin.
    Type: Application
    Filed: September 14, 2012
    Publication date: July 18, 2013
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji OKA, Kazuhiro TADA, Hiroshi YOSHIDA
  • Patent number: 8436459
    Abstract: A wiring process between the provided power semiconductor module and the external circuit is simple. In the power semiconductor module, a power semiconductor element and a cylindrical conductor are joined to one surface of a lead frame. An opening of the cylindrical conductor is exposed at a surface of transfer molding resin. Sealing with the transfer molding resin is performed such that terminal portions of the lead frame protrude from peripheral side portions of the transfer molding resin. The cylindrical conductor is conductive with a control circuit. The terminal portions of the lead frame are each conductive with a main circuit.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: May 7, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Oka, Yoshiko Obiraki, Takeshi Oi
  • Patent number: 8334589
    Abstract: A power block includes an insulating substrate, a conductive pattern formed on the insulating substrate, a power semiconductor chip bonded onto the conductive pattern by lead-free solder, a plurality of electrodes electrically connected to the power semiconductor chip and extending upwardly away from the insulating substrate, and a transfer molding resin covering the conductive pattern, the lead-free solder, the power semiconductor chip, and the plurality of electrodes, wherein surfaces of the plurality of electrodes are exposed at an outer surface of the transfer molding resin and lie in the same plane as the outer surface, the outer surface being located directly above the conductive pattern.
    Type: Grant
    Filed: January 18, 2011
    Date of Patent: December 18, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihiro Yamaguchi, Seiji Oka, Osamu Usui, Takeshi Oi
  • Patent number: 8319333
    Abstract: In the power semiconductor module, a wiring metal plate electrically connects between power semiconductor elements joined to the circuit pattern, and between the power semiconductor elements and the circuit pattern. Cylindrical main terminals are joined, substantially perpendicularly, to the wiring metal plate and the circuit pattern, respectively. A cylindrical control terminal is joined, substantially perpendicularly, to one of the power semiconductor elements.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: November 27, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Oka, Yoshiko Obiraki, Takeshi Oi
  • Patent number: 8313986
    Abstract: A method of manufacturing includes arranging an integral resin sleeve formed by integrating a plurality of sleeve parts so that the sleeve parts are respectively fitted with a plurality of electrode terminals. There is a press-fitting of the sleeve parts to the electrode terminals by performing mold clamping on molds to apply a force downward on the integral resin sleeve. Further, there is a filling of a molding resin into a hollow cavity of the molds.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: November 20, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Oka, Yoshihiro Yamaguchi