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:
Dec. 31, 1991
Filed:
Feb. 01, 1990
Applicant:
Inventors:
Shiro Konotsune, Kanagawa, JP;
Atsushi Takahashi, Ichihara, JP;
Shouichi Fukunaga, Ichihara, JP;
Kazutsune Kikuta, Ichihara, JP;
Assignee:
Chisso Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427 96 ; 427377 ; 427379 ; 4273881 ; 29DI / ;
Abstract
In a process for producing a flexible printed base by directly coating a copper foil with a polyimide precursor, followed by heating, drying and curing, a process affording a flexible printed base having a superior folding endurance and a good heat resistance at a cheap cost is provided, which process comprises carrying out the curing in an inert gas under a tension of 0.02 to 0.2 Kg/cm and at 200.degree. and 450.degree. C.