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, 1985
Filed:
Aug. 17, 1984
Applicant:
Inventors:
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428458 ; 428450 ; 4284735 ; 428901 ; 528 26 ; 528 28 ; 528 38 ; 361398 ; 174 685 ;
Abstract
A flexible, printed circuit with excellent adhesion of the printed tracks, which is obtained by coating one side of a metal foil without an intermediate layer with a polymer consisting of a polyamide, polyimide or polyamide-imide containing siloxane groups, which is obtainable by crosslinking a silicon-modified polyamide prepolymer, polyamide-acid prepolymer or polyamide-amido-acid prepolymer of the formula I, heating the coated metal foil in the temperature range from 50.degree. to 300.degree. C. till a tack-free coating is obtained, exposing the opposite side of the coated metal foil, which side is provided with a photolacquer, through a photo mask, and developing the exposed metal foil.