Patents by Inventor Takamitsu Kanazawa

Takamitsu Kanazawa 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: 10236274
    Abstract: Reduction in reliability of a semiconductor device is suppressed. A semiconductor device includes a plurality of metal patterns formed on a ceramic substrate, and a plurality of semiconductor chips mounted on the plurality of metal patterns. Also, the plurality of metal patterns include metal patterns MPH and MPU which face each other. In addition, a region which is provided between these metal patterns MPH and MPU and which is exposed from the plurality of metal patterns extends so as to zigzag along an extending direction of the metal pattern MPH.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: March 19, 2019
    Assignee: Renesas Electronics Corporation
    Inventors: Yukihiro Sato, Katsuhiko Funatsu, Takamitsu Kanazawa, Masahiro Koido, Hiroyoshi Taya
  • Patent number: 10049968
    Abstract: To improve the reliability of a semiconductor device. A chip mounting portion TAB5 is arranged to be shifted to the +x direction side. Further, a gate electrode pad of a semiconductor chip CHP1 (LV) and a pad of a semiconductor chip CHP3 are electrically coupled by a wire W1a and a wire W1b through a relay lead RL1. Likewise, a gate electrode pad of a semiconductor chip CHP1 (LW) and the pad of the semiconductor chip CHP3 are electrically coupled by a wire W1c and a wire W1d through a relay lead RL2. At this time, the structures of parts of the relay leads RL1 and RL2, which are exposed from a sealing body MR are different from the structures of respective parts exposed from the sealing body MR, of a plurality of leads LD1 and LD2 which function as external terminals.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: August 14, 2018
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Yukihiro Sato, Akira Muto, Ryo Kanda, Takamitsu Kanazawa
  • Publication number: 20180138828
    Abstract: Reliability of a semiconductor device is improved. A third semiconductor chip on which a control circuit is formed, and a first semiconductor chip of a plurality of IGBT chips are electrically connected via a high-side relay board. That is, the first semiconductor chip and the third semiconductor chip are electrically connected via a first wire, a high-side relay board and a second wire. Similarly, the third semiconductor chip on which the control circuit is formed and a second semiconductor chip of a plurality of IGBT chips are electrically connected via a low-side relay board. That is, the second semiconductor chip and the third semiconductor chip are electrically connected via the first wire, the low-side relay board and the second wire.
    Type: Application
    Filed: January 11, 2018
    Publication date: May 17, 2018
    Inventors: Kuniharu MUTO, Koji BANDO, Takamitsu KANAZAWA, Ryo KANDA, Akihiro TAMURA, Hirobumi MINEGISHI
  • Publication number: 20180122727
    Abstract: To improve the reliability of a semiconductor device. A chip mounting portion TAB5 is arranged to be shifted to the +x direction side. Further, a gate electrode pad of a semiconductor chip CHP1 (LV) and a pad of a semiconductor chip CHP3 are electrically coupled by a wire W1a and a wire W1b through a relay lead RL1. Likewise, a gate electrode pad of a semiconductor chip CHP1 (LW) and the pad of the semiconductor chip CHP3 are electrically coupled by a wire W1c and a wire W1d through a relay lead RL2. At this time, the structures of parts of the relay leads RL1 and RL2, which are exposed from a sealing body MR are different from the structures of respective parts exposed from the sealing body MR, of a plurality of leads LD1 and LD2 which function as external terminals.
    Type: Application
    Filed: December 29, 2017
    Publication date: May 3, 2018
    Inventors: Yukihiro SATO, Akira MUTO, Ryo KANDA, Takamitsu KANAZAWA
  • Patent number: 9906165
    Abstract: Reliability of a semiconductor device is improved. A third semiconductor chip on which a control circuit is formed, and a first semiconductor chip of a plurality of IGBT chips are electrically connected via a high-side relay board. That is, the first semiconductor chip and the third semiconductor chip are electrically connected via a first wire, a high-side relay board and a second wire. Similarly, the third semiconductor chip on which the control circuit is formed and a second semiconductor chip of a plurality of IGBT chips are electrically connected via a low-side relay board. That is, the second semiconductor chip and the third semiconductor chip are electrically connected via the first wire, the low-side relay board and the second wire.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: February 27, 2018
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Kuniharu Muto, Koji Bando, Takamitsu Kanazawa, Ryo Kanda, Akihiro Tamura, Hirobumi Minegishi
  • Patent number: 9887151
    Abstract: To improve the reliability of a semiconductor device. A chip mounting portion TAB5 is arranged to be shifted to the +x direction side. Further, a gate electrode pad of a semiconductor chip CHP1 (LV) and a pad of a semiconductor chip CHP3 are electrically coupled by a wire W1a and a wire W1b through a relay lead RL1. Likewise, a gate electrode pad of a semiconductor chip CHP1 (LW) and the pad of the semiconductor chip CHP3 are electrically coupled by a wire W1c and a wire W1d through a relay lead RL2. At this time, the structures of parts of the relay leads RL1 and RL2, which are exposed from a sealing body MR are different from the structures of respective parts exposed from the sealing body MR, of a plurality of leads LD1 and LD2 which function as external terminals.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: February 6, 2018
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Yukihiro Sato, Akira Muto, Ryo Kanda, Takamitsu Kanazawa
  • Publication number: 20170263587
    Abstract: Reduction in reliability of a semiconductor device is suppressed. A semiconductor device includes a plurality of metal patterns formed on a ceramic substrate, and a plurality of semiconductor chips mounted on the plurality of metal patterns. Also, the plurality of metal patterns include metal patterns MPH and MPU which face each other. In addition, a region which is provided between these metal patterns MPH and MPU and which is exposed from the plurality of metal patterns extends so as to zigzag along an extending direction of the metal pattern MPH.
    Type: Application
    Filed: May 31, 2017
    Publication date: September 14, 2017
    Inventors: Yukihiro SATO, Katsuhiko FUNATSU, Takamitsu KANAZAWA, Masahiro KOIDO, Hiroyoshi TAYA
  • Patent number: 9698125
    Abstract: Reduction in reliability of a semiconductor device is suppressed. A semiconductor device includes a plurality of metal patterns formed on a ceramic substrate, and a plurality of semiconductor chips mounted on the plurality of metal patterns. Also, the plurality of metal patterns include metal patterns MPH and MPU which face each other. In addition, a region which is provided between these metal patterns MPH and MPU and which is exposed from the plurality of metal patterns extends so as to zigzag along an extending direction of the metal pattern MPH.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: July 4, 2017
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Yukihiro Sato, Katsuhiko Funatsu, Takamitsu Kanazawa, Masahiro Koido, Hiroyoshi Taya
  • Patent number: 9666518
    Abstract: A semiconductor device includes a plurality of metal patterns formed on a ceramic substrate, and a semiconductor chip mounted on some of the plurality of metal patterns. Also, a plurality of hollow portions are formed in peripheral portions of the plurality of metal patterns. In addition, the plurality of hollow portions are not formed in a region overlapping the semiconductor chip in the plurality of metal patterns. Furthermore, the plurality of hollow portions are provided in a plurality of metal patterns arranged at a position closest to the peripheral portion of the top surface of the ceramic substrate among the plurality of metal patterns.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: May 30, 2017
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Katsuhiko Funatsu, Yukihiro Sato, Takamitsu Kanazawa, Masahiro Koido, Hiroyoshi Taya
  • Publication number: 20170141086
    Abstract: A semiconductor device includes a plurality of metal patterns formed on a ceramic substrate, and a semiconductor chip mounted on some of the plurality of metal patterns. Also, a plurality of hollow portions are formed in peripheral portions of the plurality of metal patterns. In addition, the plurality of hollow portions are not formed in a region overlapping the semiconductor chip in the plurality of metal patterns. Furthermore, the plurality of hollow portions are provided in a plurality of metal patterns arranged at a position closest to the peripheral portion of the top surface of the ceramic substrate among the plurality of metal patterns.
    Type: Application
    Filed: January 31, 2017
    Publication date: May 18, 2017
    Inventors: Katsuhiko FUNATSU, Yukihiro SATO, Takamitsu KANAZAWA, Masahiro KOIDO, Hiroyoshi TAYA
  • Patent number: 9641102
    Abstract: For example, a semiconductor device has a lead connected to a second portion of a chip mounting part on which a semiconductor chip to be a heat source is mounted and a lead connected to a third portion of the chip mounting part on which the semiconductor chip to be the heat source is mounted. Further, each of the leads has a protruding portion protruding from a sealing member. In this manner, it is possible to enhance a heat dissipation characteristic of the semiconductor device.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: May 2, 2017
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Kazuhiro Mitamura, Koji Bando, Yukihiro Sato, Takamitsu Kanazawa
  • Patent number: 9576885
    Abstract: A semiconductor device includes a plurality of metal patterns formed on a ceramic substrate, and a semiconductor chip mounted on some of the plurality of metal patterns. Also, a plurality of hollow portions are formed in peripheral portions of the plurality of metal patterns. In addition, the plurality of hollow portions are not formed in a region overlapping the semiconductor chip in the plurality of metal patterns. Furthermore, the plurality of hollow portions are provided in a plurality of metal patterns arranged at a position closest to the peripheral portion of the top surface of the ceramic substrate among the plurality of metal patterns.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: February 21, 2017
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Katsuhiko Funatsu, Yukihiro Sato, Takamitsu Kanazawa, Masahiro Koido, Hiroyoshi Taya
  • Publication number: 20170033035
    Abstract: To improve the reliability of a semiconductor device. A chip mounting portion TAB5 is arranged to be shifted to the +x direction side. Further, a gate electrode pad of a semiconductor chip CHP1 (LV) and a pad of a semiconductor chip CHP3 are electrically coupled by a wire W1a and a wire W1b through a relay lead RL1. Likewise, a gate electrode pad of a semiconductor chip CHP1 (LW) and the pad of the semiconductor chip CHP3 are electrically coupled by a wire W1c and a wire W1d through a relay lead RL2. At this time, the structures of parts of the relay leads RL1 and RL2, which are exposed from a sealing body MR are different from the structures of respective parts exposed from the sealing body MR, of a plurality of leads LD1 and LD2 which function as external terminals.
    Type: Application
    Filed: June 6, 2016
    Publication date: February 2, 2017
    Inventors: Yukihiro SATO, Akira MUTO, Ryo KANDA, Takamitsu KANAZAWA
  • Publication number: 20170033710
    Abstract: Reliability of a semiconductor device is improved. A third semiconductor chip on which a control circuit is formed, and a first semiconductor chip of a plurality of IGBT chips are electrically connected via a high-side relay board. That is, the first semiconductor chip and the third semiconductor chip are electrically connected via a first wire, a high-side relay board and a second wire. Similarly, the third semiconductor chip on which the control circuit is formed and a second semiconductor chip of a plurality of IGBT chips are electrically connected via a low-side relay board. That is, the second semiconductor chip and the third semiconductor chip are electrically connected via the first wire, the low-side relay board and the second wire.
    Type: Application
    Filed: June 28, 2016
    Publication date: February 2, 2017
    Inventors: Kuniharu MUTO, Koji BANDO, Takamitsu KANAZAWA, Ryo KANDA, Akihiro TAMURA, Hirobumi MINEGISHI
  • Patent number: 9502388
    Abstract: Technology capable of improving reliability of a semiconductor device is provided. In the present invention, a gate pad GPj formed on a front surface of a semiconductor chip CHP1 is disposed so as to be closer to a source lead SL than to other leads (a drain lead DL and a gate lead GL). As a result, according to the present invention, a distance between the gate pad GPj and the source lead SL can be shortened, and thus a length of the wire Wgj for connecting the gate pad GPj and the source lead SL together can be shortened. Thus, according to the present invention, a parasitic inductance that is present in the wire Wgj can be sufficiently reduced.
    Type: Grant
    Filed: February 7, 2016
    Date of Patent: November 22, 2016
    Assignee: Renesas Electronics Corporation
    Inventors: Takamitsu Kanazawa, Satoru Akiyama
  • Publication number: 20160163615
    Abstract: For example, a semiconductor device has a lead connected to a second portion of a chip mounting part on which a semiconductor chip to be a heat source is mounted and a lead connected to a third portion of the chip mounting part on which the semiconductor chip to be the heat source is mounted. Further, each of the leads has a protruding portion protruding from a sealing member. In this manner, it is possible to enhance a heat dissipation characteristic of the semiconductor device.
    Type: Application
    Filed: November 16, 2015
    Publication date: June 9, 2016
    Inventors: Kazuhiro MITAMURA, Koji BANDO, Yukihiro SATO, Takamitsu KANAZAWA
  • Publication number: 20160155726
    Abstract: Technology capable of improving reliability of a semiconductor device is provided. In the present invention, a gate pad GPj formed on a front surface of a semiconductor chip CHP1 is disposed so as to be closer to a source lead SL than to other leads (a drain lead DL and a gate lead GL). As a result, according to the present invention, a distance between the gate pad GPj and the source lead SL can be shortened, and thus a length of the wire Wgj for connecting the gate pad GPj and the source lead SL together can be shortened. Thus, according to the present invention, a parasitic inductance that is present in the wire Wgj can be sufficiently reduced.
    Type: Application
    Filed: February 7, 2016
    Publication date: June 2, 2016
    Inventors: Takamitsu Kanazawa, Satoru Akiyama
  • Publication number: 20160093589
    Abstract: Reduction in reliability of a semiconductor device is suppressed. A semiconductor device includes a plurality of metal patterns formed on a ceramic substrate, and a plurality of semiconductor chips mounted on the plurality of metal patterns. Also, the plurality of metal patterns include metal patterns MPH and MPU which face each other. In addition, a region which is provided between these metal patterns MPH and MPU and which is exposed from the plurality of metal patterns extends so as to zigzag along an extending direction of the metal pattern MPH.
    Type: Application
    Filed: September 24, 2015
    Publication date: March 31, 2016
    Inventors: Yukihiro SATO, Katsuhiko FUNATSU, Takamitsu KANAZAWA, Masahiro KOIDO, Hiroyoshi TAYA
  • Publication number: 20160093594
    Abstract: A semiconductor device includes a plurality of metal patterns formed on a ceramic substrate, and a semiconductor chip mounted on some of the plurality of metal patterns. Also, a plurality of hollow portions are formed in peripheral portions of the plurality of metal patterns. In addition, the plurality of hollow portions are not formed in a region overlapping the semiconductor chip in the plurality of metal patterns. Furthermore, the plurality of hollow portions are provided in a plurality of metal patterns arranged at a position closest to the peripheral portion of the top surface of the ceramic substrate among the plurality of metal patterns.
    Type: Application
    Filed: September 24, 2015
    Publication date: March 31, 2016
    Inventors: Katsuhiko FUNATSU, Yukihiro SATO, Takamitsu KANAZAWA, Masahiro KOIDO, Hiroyoshi TAYA
  • Patent number: 9263435
    Abstract: Technology capable of improving reliability of a semiconductor device is provided. In the present invention, a gate pad GPj formed on a front surface of a semiconductor chip CHP1 is disposed so as to be closer to a source lead SL than to other leads (a drain lead DL and a gate lead GL). As a result, according to the present invention, a distance between the gate pad GPj and the source lead SL can be shortened, and thus a length of the wire Wgj for connecting the gate pad GPj and the source lead SL together can be shortened. Thus, according to the present invention, a parasitic inductance that is present in the wire Wgj can be sufficiently reduced.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: February 16, 2016
    Assignee: Renesas Electronics Corporation
    Inventors: Takamitsu Kanazawa, Satoru Akiyama