Patents by Inventor Kazunori Takeguchi

Kazunori Takeguchi 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).

  • Process for manufacturing multilayer printed wiring board
    Patent number: 5116440
    Abstract: In manufacturing multilayer printed wiring boards with a cavity for mounting an electronic device, a rubber or composite rubber sheet is mounted in the cavity to prevent a prepreg resin from flowing into the cavity. The rubber sheet or composite rubber sheet is removed after applying pressure and temperature to an assembly consisting of boards to be bonded and the prepreg between them. This eliminates poor bonding which can result when resin flows into the cavity.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: May 26, 1992
    Assignee: Risho Kogyo Co., Ltd.
    Inventors: Kazunori Takeguchi, Kohji Hirata