Patents by Inventor Shigeru Tomisawa

Shigeru Tomisawa 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).

  • Rubber photoresist composite and a method for producing a circuit board using thereof
    Patent number: 5783359
    Abstract: This invention relates to a rubber photoresist composite which can be applied evenly on a large-sized or square-shaped baseboard and a method for producing a circuit board using thereof. A rubber photoresist composite of this invention comprises a photosensitive agent, a cyclized rubber and a solvent, said solvent including a solvent component having a boiling point ranging from 150.degree. C. to 220.degree. C. The rubber photoresist composite can be applied evenly on the baseboard rotated at a high speed by a spinner.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: July 21, 1998
    Assignees: Fujitsu Limited, Nippon Zeon Co., Ltd.
    Inventors: Shigeru Tomisawa, Yasuhiro Yoneda, Masahiko Sugimura