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: 8304882
    Abstract: Provided is a power semiconductor device including: an insulating substrate; a circuit pattern formed on an upper surface of the insulating substrate; a power semiconductor formed on the circuit pattern; a plurality of metal socket electrode terminals formed perpendicularly to the circuit pattern or the power semiconductor so as to be in conduction with external terminals; an integral resin sleeve in which a plurality of sleeve parts are integrated, the plurality of sleeve parts being fitted with the plurality of metal socket electrode terminals from above the plurality of metal socket electrode terminals and having openings at both ends thereof; and a molding resin covering the insulating substrate, the circuit pattern, the power semiconductor, the electrode terminals, and the integral resin sleeve.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: November 6, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Oka, Yoshihiro Yamaguchi
  • Patent number: 8299601
    Abstract: A power semiconductor module includes: a circuit board having a metal base plate, a high thermal conductive insulating layer, and a wiring pattern; power semiconductor elements electrically connected to the wiring pattern; tubular external terminal connection bodies provided to the wiring pattern for external terminals; and a transfer mold resin body encapsulated to expose through-holes in the metal base plate and used to fixedly attach cooling fins to the face of the metal base plate on the other side with attachment members, the face of the metal base plate on the other side, and top portions of the tubular external terminal connection bodies, to form insertion holes for the attachment members communicating with the through-holes and having a larger diameter than the through-holes, and to cover the one side and side faces of the metal base plate and the power semiconductor elements.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: October 30, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Oka, Yoshiko Obiraki, Takeshi Oi
  • Patent number: 8299603
    Abstract: A power semiconductor device in which transfer molding resin seals: a metallic circuit substrate; a power semiconductor element joined to a wiring pattern; and a side surface of a cylindrical external terminal communication section provided on the wiring pattern and to which an external terminal can be inserted and connected. The cylindrical external terminal communication section is substantially perpendicular to a surface on which the wiring pattern is formed. An outer surface of a metal plate of the metallic circuit substrate and a top portion of the cylindrical external terminal communication section are exposed from the transfer molding resin. The transfer molding resin is not present within the cylindrical external terminal communication section.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: October 30, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Oka, Osamu Usui, Yasushi Nakayama, Yoshiko Obiraki, Takeshi Oi
  • Patent number: 8294257
    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: October 23, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihiro Yamaguchi, Seiji Oka, Osamu Usui, Takeshi Oi
  • Publication number: 20120231586
    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: Application
    Filed: May 21, 2012
    Publication date: September 13, 2012
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji OKA, Yoshihiro Yamaguchi
  • Patent number: 8258618
    Abstract: The power semiconductor module includes: a circuit substrate; power semiconductor elements joined to element mounting portions of the wiring pattern on the circuit substrate; the cylindrical external terminal communication section joined to the wiring pattern; circuit forming means for connecting between portions that require electrical connection therebetween; and transfer molding resin for sealing these components. The cylindrical external terminal communication section is a metal cylinder, and the cylindrical external terminal communication section has a hole filled with gel.
    Type: Grant
    Filed: October 12, 2009
    Date of Patent: September 4, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshiko Obiraki, Seiji Oka, Takeshi Oi
  • Patent number: 8253236
    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: April 14, 2011
    Date of Patent: August 28, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takeshi Oi, Seiji Oka, Yoshiko Obiraki, Osamu Usui, Yasushi Nakayama
  • Publication number: 20120187554
    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: Application
    Filed: September 1, 2011
    Publication date: July 26, 2012
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji OKA, Shiori Idaka, Hiroshi Yoshida
  • Publication number: 20120098138
    Abstract: A power semiconductor device of the present invention has the power semiconductor elements having back surfaces bonded to the wiring patterns and surface electrodes on surfaces, the cylindrical communication parts having bottom surfaces bonded on the surface electrodes of the power semiconductor elements and/or on the wiring patterns, the transfer mold resin having concave parts which expose the upper surfaces of the communication parts and covering surfaces other than the upper surfaces of the communication parts, the insulating layer, the wiring patterns, and the power semiconductor elements, and the external terminals having 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, the bent area which is bent in an L shape and the bent area is embedded in the concave part of the transfer mold resin.
    Type: Application
    Filed: June 1, 2011
    Publication date: April 26, 2012
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji OKA, Tetsuya Ueda
  • Publication number: 20110260315
    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: Application
    Filed: January 18, 2011
    Publication date: October 27, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshihiro YAMAGUCHI, Seiji Oka, Osamu Usui, Takeshi Oi
  • Publication number: 20110187003
    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: Application
    Filed: April 14, 2011
    Publication date: August 4, 2011
    Inventors: Takeshi Oi, Seiji Oka, Yoshiko Obiraki, Osamu Usui, Yasushi Nakayama
  • Publication number: 20110049531
    Abstract: Provided is a power semiconductor device including: an insulating substrate; a circuit pattern formed on an upper surface of the insulating substrate; a power semiconductor formed on the circuit pattern; a plurality of metal socket electrode terminals formed perpendicularly to the circuit pattern or the power semiconductor so as to be in conduction with external terminals; an integral resin sleeve in which a plurality of sleeve parts are integrated, the plurality of sleeve parts being fitted with the plurality of metal socket electrode terminals from above the plurality of metal socket electrode terminals and having openings at both ends thereof; and a molding resin covering the insulating substrate, the circuit pattern, the power semiconductor, the electrode terminals, and the integral resin sleeve.
    Type: Application
    Filed: May 28, 2010
    Publication date: March 3, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji OKA, Yoshihiro YAMAGUCHI
  • Patent number: 7849706
    Abstract: An indoor unit of an air conditioner includes an indoor unit casing having a first suction port, a panel, a moving mechanism, and a control unit. The panel opens the first suction port by moving so that the panel is spaced apart from the indoor unit casing, and closes the first suction port by moving so that the panel is proximate to the indoor unit casing. The moving mechanism moves the panel so that the first suction port is opened to a desired degree of opening. The control unit controls the moving mechanism. Furthermore, the control unit is capable of modifying the degree of opening of the first suction port to a desired degree of opening.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: December 14, 2010
    Assignee: Daikin Industries, Ltd.
    Inventors: Masanao Yasutomi, Seiji Oka, Mikio Ito
  • Publication number: 20100133684
    Abstract: A power semiconductor module includes: a circuit board having a metal base plate, a high thermal conductive insulating layer, and a wiring pattern; power semiconductor elements electrically connected to the wiring pattern; tubular external terminal connection bodies provided to the wiring pattern for external terminals; and a transfer mold resin body encapsulated to expose through-holes in the metal base plate and used to fixedly attach cooling fins to the face of the metal base plate on the other side with attachment members, the face of the metal base plate on the other side, and top portions of the tubular external terminal connection bodies, to form insertion holes for the attachment members communicating with the through-holes and having a larger diameter than the through-holes, and to cover the one side and side faces of the metal base plate and the power semiconductor elements.
    Type: Application
    Filed: August 4, 2009
    Publication date: June 3, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji OKA, Yoshiko Obiraki, Takeshi Oi
  • Publication number: 20100133681
    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: Application
    Filed: October 20, 2009
    Publication date: June 3, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji OKA, Yoshiko OBIRAKI, Takeshi OI
  • Publication number: 20100134979
    Abstract: A power semiconductor apparatus has: plural power semiconductor units, sealed by a transfer mold resin so that insertion holes of conductive tubular sockets in which plural external terminals can be insertion-connected are exposed in one surface thereof and a metal heat dissipation surface is exposed in another surface thereof; and a conductive connecting member having the plural external terminals. The surfaces of the power semiconductor units that have the insertion holes of tubular sockets are arrayed in the same direction in the plural power semiconductor units. Electrical wiring connection between the plural power semiconductor units is effected by inserting the external terminals of the conductive connecting member into the respective insertion holes of the tubular sockets of the plural power semiconductor units.
    Type: Application
    Filed: August 13, 2009
    Publication date: June 3, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshiko Obiraki, Seiji Oka, Takeshi Oi
  • Publication number: 20100133667
    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: Application
    Filed: September 22, 2009
    Publication date: June 3, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji OKA, Yoshiko OBIRAKI, Takeshi OI
  • Publication number: 20100127389
    Abstract: The power semiconductor module includes: a circuit substrate; power semiconductor elements joined to element mounting portions of the wiring pattern on the circuit substrate; the cylindrical external terminal communication section joined to the wiring pattern; circuit forming means for connecting between portions that require electrical connection therebetween; and transfer molding resin for sealing these components. The cylindrical external terminal communication section is a metal cylinder, and the cylindrical external terminal communication section has a hole filled with gel.
    Type: Application
    Filed: October 12, 2009
    Publication date: May 27, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshiko Obiraki, Seiji Oka, Takeshi Oi
  • Publication number: 20100127383
    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: Application
    Filed: October 20, 2009
    Publication date: May 27, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji OKA, Yoshiko Obiraki, Takeshi Oi
  • Publication number: 20100117219
    Abstract: A power semiconductor device in which transfer molding resin seals: a metallic circuit substrate; a power semiconductor element joined to a wiring pattern; and a side surface of a cylindrical external terminal communication section provided on the wiring pattern and to which an external terminal can be inserted and connected. The cylindrical external terminal communication section is substantially perpendicular to a surface on which the wiring pattern is formed. An outer surface of a metal plate of the metallic circuit substrate and a top portion of the cylindrical external terminal communication section are exposed from the transfer molding resin. The transfer molding resin is not present within the cylindrical external terminal communication section.
    Type: Application
    Filed: January 18, 2008
    Publication date: May 13, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji Oka, Osamu Usui, Yasushi Nakayama, Yoshiko Obiraki, Takeshi Oi