Patents by Inventor Soichiro Kawamura

Soichiro Kawamura 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).

  • Patent number: 6303230
    Abstract: This invention relates to laminates in which a layer of polyimide precursors and a layer of photosensitive resins are formed one on top of another on an electric conductor such as a stainless steel foil and also to laminates consisting of a stainless steel foil and successive layers of polyimide precursors and photosensitive resins useful for the manufacture of HDD suspensions. In particular, the use of resins containing a repeating unit derivable from specific aromatic diamines and aromatic carboxylic acid dianhydrides as polyimide precursors makes it possible to fabricate an insulator of high fabrication accuracy and reliability on an electric conductor and, in addition, the laminates are useful as materials for the manufacture of HDD suspensions of an integrated circuit/wiring structure with high accuracy.
    Type: Grant
    Filed: October 22, 1997
    Date of Patent: October 16, 2001
    Assignee: Nippon Steel Chemical Co., Ltd.
    Inventors: Hisashi Watanabe, Takashi Tanaka, Hiroyuki Chinju, Seigo Oka, Soichiro Kawamura, Taeko Hayama