The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2001
Filed:
Jun. 10, 1998
Applicant:
Inventors:
Hirofumi Yamada, Otsu, JP;
Manabu Fukudome, Otsu, JP;
Naoki Egawa, Otsu, JP;
Yuzuru Kondo, Ashiya, JP;
Haruhiko Maki, Kyoto, JP;
Assignee:
Kanegafuchi Kagaku Kogyo Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 3/914 ; B29C 4/124 ;
U.S. Cl.
CPC ...
B29C 3/914 ; B29C 4/124 ;
Abstract
A method for producing a polyimide film in which the imidation ratio and/or the amount of volatile constituent are controlled to improve the adhesive strength of the polyimide film. The method may also comprise controlling the highest temperature of heating the prefilm to improve the adhesive strength of the polyimide film.