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:
Apr. 02, 1985
Filed:
Apr. 21, 1983
Applicant:
Inventors:
Toshihiro Inaike, Chiba, JP;
Katsuhiko Ushimi, Ichihara, JP;
Shuji Yamamoto, Chiba, JP;
Toshihiro Inoue, Ichihara, JP;
Assignee:
UBE Industries, Ltd., Chiba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
4273882 ; 427 96 ; 4284735 ;
Abstract
An aromatic imide polymer laminate material usable as a flexible circuit board substrate is produced by the process comprising coating a surface of a metallic foil with a solution of an aromatic imide polymer comprising at least 90 molar % of recurring unit of the formula (I): ##STR1## wherein R is a symmetrical bivalent aromatic radical having no substituent, and dissolved in a solvent consisting essentially of at least one phenolic compound; and heat drying the resultant solution layer to form an aromatic imide polymer solid layer firmly bonded directly to the metallic foil.