Patents by Inventor Yoshiharu Tomura

Yoshiharu Tomura 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).

  • Multilayer printed wiring board
    Patent number: 5130179
    Abstract: A multilayer printed wiring board and a method of manufacturing the board are provided. The board has a printed wiring incorporating metal powder consisting of fine grains and a layer of insulation material which is adhesive when uncured. The fine grains of the metal powder are securely fixed to the layer of insulation material so as to strengthen the bond between the printed wiring and the layer of insulation material. Alternatively, the layer of insulation material incorporates a layer of glass powder to enhance the insulation thereof. In this case, the layer of glass powder is made by evenly spreading glass powder on a first coat of uncured adhesive insulation material. The layer of glass powder is covered by a second coat of insulation material after the first coat of insulation material is cured so that the layer of glass powder is sandwiched between the two coats of insulation material.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: July 14, 1992
    Inventors: Masafumi Miyazaki, Teruhisa Tanabe, Yoshiharu Tomura
  • Method of making multilayer printed wiring board
    Patent number: 5078831
    Abstract: A multilayer printed wiring board and a method of manufacturing the board are provided. The board has a printed wiring incorporating metal powder consisting of fine grains and a layer of insulation material which is adhesive when uncured. The fine grains of the metal powder are securely fixed to the layer of insulation material so as to strengthen the bond between the printed wiring and the layer of insulation material. Alternatively, the layer of insulation material incorporates a layer of glass powder to enhance the insulation thereof. In this case, the layer of glass powder is made by evenly spreading glass powder on a first coat of uncured adhesive insulation material. The layer of glass powder is covered by a second coat of insulation material after the first coat of insulation material is cured so that the layer of glass powder is sandwiched between the two coats of insulation material.
    Type: Grant
    Filed: September 13, 1990
    Date of Patent: January 7, 1992
    Inventors: Masafumi Miyazaki, Teruhisa Tanabe, Yoshiharu Tomura