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:
Jan. 15, 1991
Filed:
Aug. 24, 1989
Applicant:
Inventors:
Assignee:
The Yokohama Rubber Co., Ltd., Minato-ky, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428209 ; 428413 ; 428414 ; 428418 ; 428457 ; 428463 ; 428901 ; 361397 ; 361398 ;
Abstract
Composite films for use in printed wiring boards are comprised of an insulating layer and a copper foil laminated thereover, the insulating layer being made up predominantly of a selected epoxy resin and a selected acrylonitrile-butadiene rubber, whereby voidlessness, thickness uniformity and insulation adjustment are enhanced. Also disclosed is a method of producing a printed wiring board using the film by a subtractive process.