Patents by Inventor Mithumasa Kojima

Mithumasa Kojima 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).

  • Flexible photosensitive polymer composition with azide and/or amine compound, poly(amic acid) and highly polar compound with boiling point above 150.degree. C.
    Patent number: 4587197
    Abstract: A photosensitive polymer composition comprising (A) a poly(amic acid), (B) a compound or a mixture of compounds which can form a compound having two or more amino groups in the molecule, and (C) at least one compound having a boiling point of 150.degree. C. or higher at atmospheric pressure and selected from the group consisting of ##STR1## wherein R.sup.a, R.sup.b, R.sup.c, m and n are as defined in the specification, has good properties and does not produce cracks on a pattern at the time of development obtained from said composition.
    Type: Grant
    Filed: February 8, 1984
    Date of Patent: May 6, 1986
    Assignees: Hitachi, Ltd., Hitachi Chemical Co., Ltd.
    Inventors: Mithumasa Kojima, Fumio Kataoka, Fusaji Shoji, Hitoshi Yokono