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:
Mar. 31, 1992
Filed:
Jan. 16, 1990
Applicant:
Inventors:
Horst Kober, Weinheim, DE;
Uwe Horch, Schwabisch-Gmund, DE;
Assignee:
Firma Carl Freudenberg, Weinheim/Bergstr., DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
156250 ; 156257 ; 156268 ; 29829 ; 29830 ; 29835 ; 361398 ; 428901 ;
Abstract
In a process for manufacturing printed-circuit boards which have rigid and flexible areas or internal layers of printed-circuit boards, a piece of the surface is punched out to form a window in every area of the insulating layer material which is to be flexible. The punched out piece is reinserted into the punched-out window as a filling piece before laminating the compound of individual layers.