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).

  • Publication number: 20150069601
    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: Application
    Filed: August 12, 2014
    Publication date: March 12, 2015
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Kei YAMAGUCHI, Yuji Ichimura, Daisuke Kimijima
  • Publication number: 20140319669
    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: Application
    Filed: April 25, 2014
    Publication date: October 30, 2014
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Daisuke KIMIJIMA, Yuji ICHIMURA
  • Publication number: 20140210060
    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: January 14, 2014
    Publication date: July 31, 2014
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Yuko NAKAMATA, Yuji ICHIMURA, Kei YAMAGUCHI
  • Patent number: 7234358
    Abstract: A pressure detecting apparatus has a pressure detecting device that converts a strain caused by a stress exerted thereto to an electrical signal, and outputs the converted electrical signal. The apparatus has a housing base including a housing recess that houses the pressure detecting device therein, and a connecting material interposed between the pressure detecting device and the housing recess. The connecting material connects the pressure detecting device and the housing recess with a tensile elongation percentage of about 400% or higher. The pressure detecting apparatus facilitates preventing thermal stress from adversely affecting the detection performance thereof, and produces excellent thermal response.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: June 26, 2007
    Assignee: Fuji Electric Device Technology Co., Ltd.
    Inventors: Kazunori Saito, Yuji Ichimura, Kei Yamaguchi, Katsumichi Ueyanagi, Shigeru Shinoda
  • Publication number: 20060243054
    Abstract: A pressure detecting apparatus has a pressure detecting device that converts a strain caused by a stress exerted thereto to an electrical signal, and outputs the converted electrical signal. The apparatus has a housing base including a housing recess that houses the pressure detecting device therein, and a connecting material interposed between the pressure detecting device and the housing recess. The connecting material connects the pressure detecting device and the housing recess with a tensile elongation percentage of about 400% or higher. The pressure detecting apparatus facilitates preventing thermal stress from adversely affecting the detection performance thereof, and produces excellent thermal response.
    Type: Application
    Filed: February 16, 2006
    Publication date: November 2, 2006
    Inventors: Kazunori Saito, Yuji Ichimura, Kei Yamaguchi, Katsumichi Ueyanagl, Shigeru Shinoda
  • Patent number: 5837336
    Abstract: A film-wrapped article consisting of a rectangular product wrapped with a heat-shrinkable plastic film in intimate contact therewith, the upper and under edge portions of the film being overlapped and sealed together along the body of the wrap to form a seal. A part of the seal on one side of the article is formed as a weakly joined zone whose adhesion strength increases by continuous or stepwise gradations from an opening zone where the adhesion strength is the lowest toward the both ends of the article. The weakly joined zone is made up of joined and unjoined regions extending along the interface between the upper and under edge portions, in a repetitive pattern of the regions varying in adhesion strength with changes in the area ratio of the joined and unjoined regions. The wrap has a cut for unwrapping use made in the opening or neighboring zone of the upper edge portion.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: November 17, 1998
    Assignee: TDK Corporation
    Inventors: Yuji Ichimura, Tatsuo Fujii
  • Patent number: 5606200
    Abstract: A resin sealed semiconductor device includes a metallic base plate and a covering case adhered to a peripheral section of the metallic base plate. Semiconductor elements are loaded on the metallic base plate, and lead-out terminals extend from an upper surface of a terminal-supporting plate made to adhere to lead-out terminals. The terminal-supporting plate forms an upper surface of the covering case 5 which is filled with a sealing resin. Uneven stripes are molded and extend circumferentially over the entire outer peripheral surface of terminal-supporting plate to roughen the peripheral surface, and the adhesion strength is reinforced by increasing the adhesive area between the terminal-supporting plate and the sealing resin.
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: February 25, 1997
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Kouichi Haraguchi, Yuji Ichimura