Patents by Inventor Yuji Ichimura

Yuji Ichimura 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: 11640926
    Abstract: A semiconductor device includes a semiconductor chip, a substrate having a main surface on which the semiconductor chip is arranged, a resin case which has a storage space therein and a side wall, the side wall having an injection path extending from the storage space to a device exterior, the resin case having a first opening at a bottom side thereof, connecting the storage space to the device exterior, the substrate being disposed on the resin case, at a main surface side of the substrate facing at the bottom side of the resin case, and a sealing material filling the storage space and the injection path.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: May 2, 2023
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Yuji Ichimura
  • Patent number: 11430707
    Abstract: The semiconductor device includes an insulating circuit substrate mounted with a semiconductor element; an external terminal; a base including a support portion; an adhesive sheet; and a sealing portion covering the semiconductor element. The support portion has a first surface, a second surface on the side opposite to the first surface, and a first opening opened at the first surface and the second surface. The insulating circuit substrate is disposed in the first opening. The adhesive sheet is disposed on the second surface of the support portion and has a second opening in which the semiconductor element is disposed in plan view. The adhesive sheet is projected into the first opening in plan view and adhered to a circuit block. The external terminal is adhered on the adhesive sheet and has a connecting surface to which a bonding wire is connected.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: August 30, 2022
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Yuji Ichimura
  • Patent number: 11177224
    Abstract: A flat plate frame is formed, which is flat plate-shaped, which has an opening penetrating its front and rear surfaces and groove terminal patterns formed on its front surface, and which contains a semi-cured thermosetting resin. Then, an insulating substrate is disposed on the rear surface so as to cover the opening of the flat plate frame, external connection terminals are disposed on the terminal patterns, and heating is carried out. As a result, a terminal package to which the insulating substrate and external connection terminals are firmly joined is produced using the flat plate frame. The external connection terminals included in the terminal package are reliably and firmly joined to the terminal package. Therefore, the external connection terminals are not displaced when wires are bonded to the external connection terminals.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: November 16, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Toshio Denta, Yuji Ichimura
  • Publication number: 20200357753
    Abstract: A flat plate frame is formed, which is flat plate-shaped, which has an opening penetrating its front and rear surfaces and groove terminal patterns formed on its front surface, and which contains a semi-cured thermosetting resin. Then, an insulating substrate is disposed on the rear surface so as to cover the opening of the flat plate frame, external connection terminals are disposed on the terminal patterns, and heating is carried out. As a result, a terminal package to which the insulating substrate and external connection terminals are firmly joined is produced using the flat plate frame. The external connection terminals included in the terminal package are reliably and firmly joined to the terminal package. Therefore, the external connection terminals are not displaced when wires are bonded to the external connection terminals.
    Type: Application
    Filed: March 31, 2020
    Publication date: November 12, 2020
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Toshio DENTA, Yuji ICHIMURA
  • Publication number: 20200185291
    Abstract: A semiconductor device includes a semiconductor chip, a substrate having a main surface on which the semiconductor chip is arranged, a resin case which has a storage space therein and a side wall, the side wall having an injection path extending from the storage space to a device exterior, the resin case having a first opening at a bottom side thereof, connecting the storage space to the device exterior, the substrate being disposed on the resin case, at a main surface side of the substrate facing at the bottom side of the resin case, and a sealing material filling the storage space and the injection path.
    Type: Application
    Filed: October 29, 2019
    Publication date: June 11, 2020
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Yuji ICHIMURA
  • Patent number: 10597526
    Abstract: A resin composition is disclosed that includes a thermosetting base resin; a curing agent; an inorganic filler; and at least one fluorine resin powder selected from polyvinylidene fluoride, polychlorotrifluoroethylene, and a tetrafluoroethylene/perfluoro(alkyl vinyl ether)/chlorotrifluoroethylene copolymer, and a semiconductor device which is fabricated by being sealed using a sealant formed of the resin composition.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: March 24, 2020
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Yuko Nakamata, Yuji Ichimura
  • Publication number: 20200091025
    Abstract: The semiconductor device includes an insulating circuit substrate mounted with a semiconductor element; an external terminal; a base including a support portion; an adhesive sheet; and a sealing portion covering the semiconductor element. The support portion has a first surface, a second surface on the side opposite to the first surface, and a first opening opened at the first surface and the second surface. The insulating circuit substrate is disposed in the first opening. The adhesive sheet is disposed on the second surface of the support portion and has a second opening in which the semiconductor element is disposed in plan view. The adhesive sheet is projected into the first opening in plan view and adhered to a circuit block. The external terminal is adhered on the adhesive sheet and has a connecting surface to which a bonding wire is connected.
    Type: Application
    Filed: July 25, 2019
    Publication date: March 19, 2020
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Yuji ICHIMURA
  • Patent number: 10106683
    Abstract: A resin composite includes a maleimide resin powder and a resin having a glass transition point that is lower that the glass transition point of the maleimide resin. The resin having a glass transition point that is lower than that of the maleimide resin may be an epoxy resin. Then, the resin composite may be cured at the curing temperature of the epoxy resin. The maleimide resin powder is mixed in an amount ranging from 50 weight % to 80 weight % with respect to the epoxy resin.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: October 23, 2018
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Yuko Nakamata, Yuji Ichimura
  • Patent number: 10077385
    Abstract: A resin composition has a high glass transition temperature and is highly adhesive to a member made of metal, ceramics, or the like. The resin composition includes a thermosetting base resin, a thermoplastic resin powder, a curing agent, and an inorganic filler, a cured resin product formed by curing the resin composition, and an electrical member.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: September 18, 2018
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Kotomi Suzuki, Yuji Ichimura, Yuko Nakamata
  • Publication number: 20170275453
    Abstract: A resin composition is disclosed that includes a thermosetting base resin; a curing agent; an inorganic filler; and at least one fluorine resin powder selected from polyvinylidene fluoride, polychlorotetrafluoroethylene, and a tetrafluoroethylene/perfluoro(alkyl vinyl ether)/chlorotrifluoroethylene copolymer, and a semiconductor device which is fabricated by being sealed using a sealant formed of the resin composition.
    Type: Application
    Filed: February 28, 2017
    Publication date: September 28, 2017
    Applicant: Fuji Electric Co., Ltd.
    Inventors: Yuko Nakamata, Yuji Ichimura
  • Publication number: 20170240744
    Abstract: A resin composite includes a maleimide resin powder and a resin having a glass transition point that is lower that the glass transition point of the maleimide resin. The resin having a glass transition point that is lower than that of the maleimide resin may be an epoxy resin. Then, the resin composite may be cured at the curing temperature of the epoxy resin. The maleimide resin powder is mixed in an amount ranging from 50 weight % to 80 weight % with respect to the epoxy resin.
    Type: Application
    Filed: January 3, 2017
    Publication date: August 24, 2017
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Yuko NAKAMATA, Yuji ICHIMURA
  • Publication number: 20170233620
    Abstract: A resin composition has a high glass transition temperature and is highly adhesive to a member made of metal, ceramics, or the like. The resin composition includes a thermosetting base resin, a thermoplastic resin powder, a curing agent, and an inorganic filler, a cured resin product formed by curing the resin composition, and an electrical member.
    Type: Application
    Filed: January 20, 2017
    Publication date: August 17, 2017
    Applicant: Fuji Electric Co., Ltd.
    Inventors: Kotomi Suzuki, Yuji Ichimura, Yuko Nakamata
  • Patent number: 9617455
    Abstract: A silicone resin composition is provided that exhibits an increased adhesiveness relative to insulating circuit substrates and can prevent bubble production even when moisture absorption has occurred, exhibits an excellent heat resistance, and is free of problems such as cracking. A silicone resin composition for use as a sealant for a power semiconductor module includes an insulating circuit substrate having a Cu layer formed on a surface thereof. The silicone resin composition is formed on the Cu layer of the insulating circuit substrate, and has, after curing, a penetration of 35 to 70 and an adhesive strength of 50 to 180 kPa between the silicone resin composition and the insulating circuit substrate. The penetration is measured in accordance with JIS K 2220.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: April 11, 2017
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Makoto Higashidate, Yuji Ichimura
  • Patent number: 9548253
    Abstract: A method of manufacturing a semiconductor device and a semiconductor device that is manufactured by the method. In the method of manufacturing a semiconductor device, a releasing sheet is disposed in close contact with a hole of an aluminum plate having the recessed hole, and a skeleton structure of a semiconductor device is put into the recessed hole. Then, liquid epoxy resin is poured into the recessed hole. After hardening, the epoxy resin body 10 including the skeleton structure is taken out from the recessed hole to complete manufacturing the semiconductor device. Using a simple molding jig including the aluminum plate, and covering the skeleton structure with the epoxy resin body, a highly reliable semiconductor device with a case-less construction can be manufactured.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: January 17, 2017
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Kei Yamaguchi, Yuji Ichimura, Daisuke Kimijima
  • Publication number: 20160333239
    Abstract: A silicone resin composition is provided that exhibits an increased adhesiveness relative to insulating circuit substrates and can prevent bubble production even when moisture absorption has occurred, exhibits an excellent heat resistance, and is free of problems such as cracking. A silicone resin composition for use as a sealant for a power semiconductor module includes an insulating circuit substrate having a Cu layer formed on a surface thereof. The silicone resin composition is formed on the Cu layer of the insulating circuit substrate, and has, after curing, a penetration of 35 to 70 and an adhesive strength of 50 to 180 kPa between the silicone resin composition and the insulating circuit substrate. The penetration is measured in accordance with JIS K 2220.
    Type: Application
    Filed: April 5, 2016
    Publication date: November 17, 2016
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Makoto HIGASHIDATE, Yuji ICHIMURA
  • Publication number: 20160211201
    Abstract: Provided is a method of manufacturing a semiconductor device which includes a semiconductor chip, an insulating board mounted with the semiconductor chip and having a wiring pattern, and a leadframe connected to the wiring pattern, the semiconductor chip, the wiring pattern and the leadframe being partially sealed with a sealing resin, wherein: an epoxy resin composition formed by adding 0.3 to 0.7 mass % of epoxysilane as a silane coupling agent to an epoxy resin is used as the sealing resin; and a copper member made of copper or a copper alloy and having an oxide film formed in the surface with a film thickness in a color indicated by an L* value in the range of 48 to 51, an a* value in the range of 40 to 49 and a b* value in the range of 24 to 40 is used as the leadframe and the wiring pattern.
    Type: Application
    Filed: March 28, 2016
    Publication date: July 21, 2016
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Yuko NAKAMATA, Yuji ICHIMURA, Kei YAMAGUCHI
  • Patent number: 9355943
    Abstract: Provided is a method of manufacturing a semiconductor device which includes a semiconductor chip, an insulating board mounted with the semiconductor chip and having a wiring pattern, and a leadframe connected to the wiring pattern, the semiconductor chip, the wiring pattern and the leadframe being partially sealed with a sealing resin, wherein: an epoxy resin composition formed by adding 0.3 to 0.7 mass % of epoxysilane as a silane coupling agent to an epoxy resin is used as the sealing resin; and a copper member made of copper or a copper alloy and having an oxide film formed in the surface with a film thickness in a color indicated by an L* value in the range of 48 to 51, an a* value in the range of 40 to 49 and a b* value in the range of 24 to 40 is used as the leadframe and the wiring pattern.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: May 31, 2016
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Yuko Nakamata, Yuji Ichimura, Kei Yamaguchi
  • Patent number: 9123639
    Abstract: A power semiconductor module available under environments of high temperature has enhanced heat resistance of silicone gel filled up in a case. A power semiconductor module comprises a power semiconductor element, an insulating substrate mounted with the power semiconductor element, a resin case containing the power semiconductor element and the insulating substrate, a silicone gel injected into the resin case, and a sheet composed of a silicone rubber or silicone resin, disposed between the resin case and the silicone gel within the resin case.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: September 1, 2015
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Daisuke Kimijima, Yuji Ichimura
  • Patent number: 9035446
    Abstract: Provided is a power module. The power module includes a power semiconductor chip. The power module further includes a case that accommodates the power semiconductor chip. A silicone gel seals the power semiconductor chip within the case. The silicone gel including a heat-resistant silicone gel containing 20 to 100 mass ppm of a metal complex comprising a metal selected from a group consisting of iron and platinum.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: May 19, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Daisuke Kimijima, Yuji Ichimura
  • Publication number: 20150115428
    Abstract: A power semiconductor module available under environments of high temperature has enhanced heat resistance of silicone gel filled up in a case. A power semiconductor module comprises a power semiconductor element, an insulating substrate mounted with the power semiconductor element, a resin case containing the power semiconductor element and the insulating substrate, a silicone gel injected into the resin case, and a sheet composed of a silicone rubber or silicone resin, disposed between the resin case and the silicone gel within the resin case.
    Type: Application
    Filed: October 10, 2014
    Publication date: April 30, 2015
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Daisuke KIMIJIMA, Yuji ICHIMURA