Patents by Inventor Shigemi Yamane

Shigemi Yamane 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).

  • Lead frame and method for manufacturing the same
    Patent number: 4640723
    Abstract: A lead frame consists of a copper alloy containing 0.1 to 1% by weight of chromium and 0.001 to 0.5% by weight of zirconium and having a precipitate with a grain size of 0.5 to 50 .mu.m distributed therein at a rate of 1,000 to 10,000 grains/mm.sup.2. The lead frame is manufactured by casting a copper alloy containing 0.1 to 1% by weight of chromium and 0.001 to 0.5% by weight of zirconium by continuous casting, and performing rolling, a solution treatment, a cold working, and an age-hardening. The lead frame has an excellent bonding performance with an Au wire, hardness and bending strength, and is inexpensive.
    Type: Grant
    Filed: December 20, 1983
    Date of Patent: February 3, 1987
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Shinzo Sugai, Shigemi Yamane, Takashi Kuze