Patents by Inventor Yasuo Nakatasuka

Yasuo Nakatasuka 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).

  • Production method of anisotropic conductive sheet
    Patent number: 7601281
    Abstract: A flowable insulating resin 1 is placed in a sheet-like molding die space and conductive magnetic particles 2 are dispersed in the insulating resin 1. A first magnetic field G1 is acted in the sheet thickness direction on the position where a conductive path is to be formed in the die space, and conductive magnetic particles 2a are locally collected together to form a conductive path. Simultaneously, a second magnetic field G2 is acted in the sheet thickness direction on the intermediate region and the magnetic field G2 is moved in the lateral direction to move conductive magnetic particles 2b left in the intermediate region to join the collection forming the conductive path. As a result, the number of the conductive magnetic particles left in the insulating resin becomes smaller.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: October 13, 2009
    Assignee: Nitto Denko Corporation
    Inventors: Toshiaki Masaki, Kenichi Ikeda, Osamu Maekawa, Yasuo Nakatasuka, Masataka Tada