Patents by Inventor Naohumi Sato

Naohumi Sato 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 having small pitch between outer leads
    Patent number: 5486722
    Abstract: A lead frame in which a bulgy portion is disposed to each of inner leads or outer leads at a position corresponding to a mold line, whereby a lead gap in the portion is defined as less than 0.15 mm.The lead frame has such a shape as causing less resin leakage upon applying resin molding to a packaging main body upon preparing an IC plastic package. This enables to improve the yield in preparing the IC plastic package and reduce the manufacturing cost.
    Type: Grant
    Filed: May 3, 1994
    Date of Patent: January 23, 1996
    Assignee: Sumitomo Metal Mining Company, Limited
    Inventors: Naohumi Sato, Yasuhiro Yanagisawa