Patents by Inventor Hisashi Kawafuji

Hisashi Kawafuji 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: 10796979
    Abstract: A power module includes: a power chip; a control chip controlling the power chip; a power terminal connected to the power chip; a control terminal connected to the control chip; and a package covering the power chip, the control chip, the power terminal, and the control terminal with mold resin, wherein first and second recesses for attaching a fin are respectively provided on side faces facing each other of the package from which neither the power terminal nor the control terminal protrudes, and the first and second recesses are arranged not at positions opposite to each other but alternately.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: October 6, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Maki Hasegawa, Shuhei Yokoyama, Shigeru Mori, Hisashi Kawafuji
  • Patent number: 10741472
    Abstract: A power module includes: a power chip; a control chip controlling the power chip; a power terminal connected to the power chip; a control terminal connected to the control chip; and a package covering the power chip, the control chip, the power terminal, and the control terminal with mold resin, wherein first and second recesses for attaching a fin are respectively provided on side faces facing each other of the package from which neither the power terminal nor the control terminal protrudes, and the first and second recesses are arranged not at positions opposite to each other but alternately.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: August 11, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Maki Hasegawa, Shuhei Yokoyama, Shigeru Mori, Hisashi Kawafuji
  • Patent number: 10332869
    Abstract: A power module includes one control IC and a plurality of reverse conducting insulated gate bipolar transistors (RC-IGBTs). The control IC has the functions of a high-voltage IC and a low-voltage IC. The plurality of RC-IGBTs are disposed on three of four sides of the control IC and connected to the control IC through only wires.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: June 25, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naoki Ikeda, Hisashi Oda, Maki Hasegawa, Hisashi Kawafuji
  • Publication number: 20190115283
    Abstract: A power module includes: a power chip; a control chip controlling the power chip; a power terminal connected to the power chip; a control terminal connected to the control chip; and a package covering the power chip, the control chip, the power terminal, and the control terminal with mold resin, wherein first and second recesses for attaching a fin are respectively provided on side faces facing each other of the package from which neither the power terminal nor the control terminal protrudes, and the first and second recesses are arranged not at positions opposite to each other but alternately.
    Type: Application
    Filed: April 16, 2018
    Publication date: April 18, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Maki HASEGAWA, Shuhei YOKOYAMA, Shigeru MORI, Hisashi KAWAFUJI
  • Publication number: 20170236812
    Abstract: A power module includes one control IC and a plurality of reverse conducting insulated gate bipolar transistors (RC-IGBTs). The control IC has the functions of a high-voltage IC and a low-voltage IC. The plurality of RC-IGBTs are disposed on three of four sides of the control IC and connected to the control IC through only wires.
    Type: Application
    Filed: April 28, 2017
    Publication date: August 17, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Naoki IKEDA, Hisashi ODA, Maki HASEGAWA, Hisashi KAWAFUJI
  • Patent number: 9716058
    Abstract: A power module includes one control IC and a plurality of reverse conducting insulated gate bipolar transistors (RC-IGBTs). The control IC has the functions of a high-voltage IC and a low-voltage IC. The plurality of RC-IGBTs are disposed on three of four sides of the control IC and connected to the control IC through only wires.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: July 25, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naoki Ikeda, Hisashi Oda, Maki Hasegawa, Hisashi Kawafuji
  • Patent number: 9324685
    Abstract: There is provided a semiconductor device having a converter circuit, a brake circuit and an inverter circuit and manufacturable by a simplified manufacturing process. The semiconductor device has a plurality of die pads, IGBTs, diodes, freewheel diodes, an HVIC and LVICs mounted on the plurality of die pads, a plurality of leads, and an encapsulation resin body that covers these component parts. In a manufacturing process, a single-plate lead frame having the above-described plurality of die pads and leads connected together can be prepared. The semiconductor device may be manufactured by using this single-plate lead frame.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: April 26, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hongbo Zhang, Hisashi Kawafuji, Ming Shang, Shinya Nakagawa
  • Publication number: 20160064353
    Abstract: There is provided a semiconductor device having a converter circuit, a brake circuit and an inverter circuit and manufacturable by a simplified manufacturing process. The semiconductor device has a plurality of die pads, IGBTs, diodes, freewheel diodes, an HVIC and LVICs mounted on the plurality of die pads, a plurality of leads, and an encapsulation resin body that covers these component parts. In a manufacturing process, a single-plate lead frame having the above-described plurality of die pads and leads connected together can be prepared. The semiconductor device may be manufactured by using this single-plate lead frame.
    Type: Application
    Filed: November 12, 2015
    Publication date: March 3, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hongbo ZHANG, Hisashi KAWAFUJI, Ming SHANG, Shinya NAKAGAWA
  • Patent number: 9230891
    Abstract: There is provided a semiconductor device having a converter circuit, a brake circuit and an inverter circuit and manufacturable by a simplified manufacturing process. the semiconductor device has a plurality of die pads, IGBTs, diodes, freewheel diodes, an HVIC and LVICs mounted on the plurality of die pads, a plurality of leads, and an encapsulation resin body that covers these component parts. In a manufacturing process, a single-plate lead frame having the above-described plurality of die pads and leads connected together can be prepared. The semiconductor device may be manufactured by using this single-plate lead frame.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: January 5, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hongbo Zhang, Hisashi Kawafuji, Ming Shang, Shinya Nakagawa
  • Publication number: 20150155228
    Abstract: A power module includes one control IC and a plurality of reverse conducting insulated gate bipolar transistors (RC-IGBTs). The control IC has the functions of a high-voltage IC and a low-voltage IC. The plurality of RC-IGBTs are disposed on three of four sides of the control IC and connected to the control IC through only wires.
    Type: Application
    Filed: October 14, 2014
    Publication date: June 4, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Naoki IKEDA, Hisashi ODA, Maki HASEGAWA, Hisashi KAWAFUJI
  • Publication number: 20150084173
    Abstract: There is provided a semiconductor device having a converter circuit, a brake circuit and an inverter circuit and manufacturable by a simplified manufacturing process. the semiconductor device has a plurality of die pads, IGBTs, diodes, freewheel diodes, an HVIC and LVICs mounted on the plurality of die pads, a plurality of leads, and an encapsulation resin body that covers these component parts. In a manufacturing process, a single-plate lead frame having the above-described plurality of die pads and leads connected together can be prepared. The semiconductor device may be manufactured by using this single-plate lead frame.
    Type: Application
    Filed: April 7, 2014
    Publication date: March 26, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hongbo ZHANG, Hisashi KAWAFUJI, Ming SHANG, Shinya NAKAGAWA
  • Patent number: 7808085
    Abstract: A semiconductor device includes a pair of power chips, an IC chip, a plurality of leads one of which having a die pad on which the power chips are mounted and another one having a die attach portion on which the IC chip is mounted, a resin sheet firmly adhered to one side of the die pad, and a resin casing made by molding operation to encapsulate the power chips, the IC chip and the resin sheet by a resin in such a manner that one surface of the resin sheet opposite the die pad is exposed to the exterior of the resin casing. The resin casing has a groove formed in one surface opposite the exposed surface of the resin sheet, the groove extending parallel to the resin sheet and perpendicular to a runner through which the resin was supplied in the molding operation.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: October 5, 2010
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroyuki Ozaki, Hisashi Kawafuji, Shinya Nakagawa, Kenichi Hayashi
  • Patent number: 7781262
    Abstract: The method of producing a semiconductor device in which chips are resin-molded, including steps of: preparing frames having front and back surfaces and die pads; preparing an insulation resin sheet having a first and a second surfaces; preparing a resin-sealing metal mold having cap pins; mounting the resin sheet inside the resin-sealing metal mold in such a manner that the second surface of the resin sheet contacts an inner bottom surface of the resin-sealing metal mold; mounting power chips on the surfaces of the die pads; positioning the frames on the first surface of the resin sheet in such a manner that the back surfaces of the die pads contact the first surface of the resin sheet; pressing the die pads toward the resin sheet using the cap pins and fixing the die pads; injecting a sealing resin in the resin-sealing metal mold and hardening the sealing resin; and removing the semiconductor device in which the power chips are molded with the sealing resin out from the resin-sealing metal mold.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: August 24, 2010
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kenichi Hayashi, Hisashi Kawafuji, Tatsuyuki Takeshita, Nobuhito Funakoshi, Hiroyuki Ozaki
  • Patent number: 7671453
    Abstract: A semiconductor device in which chips are resin-molded, including: frames having front and back surfaces and die pads; power chips mounted on the surfaces of the die pads; an insulation resin sheet having a first and a second surfaces which are opposed against each other, the resin sheet being disposed such that the back surfaces of the die pads contact the first surface of the resin sheet; and a mold resin applied on the first surface of the resin sheet so as to seal up the power chips. The thermal conductivity of the resin sheet is larger than that of the mold resin.
    Type: Grant
    Filed: September 22, 2004
    Date of Patent: March 2, 2010
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kenichi Hayashi, Hisashi Kawafuji, Tatsuyuki Takeshita, Nobuhito Funakoshi, Hiroyuki Ozaki, Kazuhiro Tada
  • Patent number: 7361983
    Abstract: In a semiconductor device (1), semiconductor elements (2) and (3) are mounted on a lead frame (5) having leads (4). The semiconductor elements (2) and (3) are connected with the leads (4) by metallic wires (6) and (7). The semiconductor device (1) also has a heat sink (8). The members (2) to (8) are sealed with a plastic package (10). The leads (4) are exposed outward. Each of the end leads (4a) to (4d) has a wide first lead portion, a narrow second lead portion, a third lead portion to be inserted into an external substrate, and a protruding gap-controlling portion (9) for keeping the gap between the semiconductor device (1) and the external substrate constant. Because the heat resistance from the leads (4) to the plastic package (10) increases, the temperature-rise property of the lead is improved so that the solderability is improved.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: April 22, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kenichi Hayashi, Hisashi Kawafuji, Junichi Murai, Goro Izuta
  • Publication number: 20070132112
    Abstract: A semiconductor device includes a pair of power chips, an IC chip, a plurality of leads one of which having a die pad on which the power chips are mounted and another one having a die attach portion on which the IC chip is mounted, a resin sheet firmly adhered to one side of the die pad, and a resin casing made by molding operation to encapsulate the power chips, the IC chip and the resin sheet by a resin in such a manner that one surface of the resin sheet opposite the die pad is exposed to the exterior of the resin casing. The resin casing has a groove formed in one surface opposite the exposed surface of the resin sheet, the groove extending parallel to the resin sheet and perpendicular to a runner through which the resin was supplied in the molding operation.
    Type: Application
    Filed: November 15, 2006
    Publication date: June 14, 2007
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroyuki Ozaki, Hisashi Kawafuji, Shinya Nakagawa, Kenichi Hayashi
  • Patent number: D770994
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: November 8, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Maki Hasegawa, Masahiro Kato, Shinya Nakagawa, Hisashi Kawafuji, Toru Iwagami
  • Patent number: D772182
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: November 22, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Maki Hasegawa, Masahiro Kato, Shinya Nakagawa, Hisashi Kawafuji, Toru Iwagami
  • Patent number: D777124
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: January 24, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Maki Hasegawa, Masahiro Kato, Shinya Nakagawa, Hisashi Kawafuji, Toru Iwagami
  • Patent number: D783550
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: April 11, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Maki Hasegawa, Masahiro Kato, Shinya Nakagawa, Hisashi Kawafuji, Toru Iwagami