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. 21, 1998
Filed:
Jul. 31, 1996
Akinori Shiotani, Chiba, JP;
Hiroaki Yamaguchi, Chiba, JP;
Fumio Aoki, Chiba, JP;
Katsutoshi Washio, Chiba, JP;
Ube Industries, Ltd., Yamaguchi, JP;
Abstract
A polyimide/metal composite sheet is composed of a polyimide substrate film (made of polyimide prepared by reaction of symmetric biphenyltetracarboxylic acid dianhydride and p-phenylenediamine, and optionally 4,4'-diaminodiphenyl ether), a polyimide intervening layer (made of polyimide prepared by reaction of asymmetric biphenyltetracarboxylic acid dianhydride and 1,3-bis(4-aminophenoxy)benzene), and a metal foil. The polyimide substrate film and the intervening polyimide layer are firmly combined and hardly peelable from each other, and the intervening polyimide layer and the metal foil are combined strongly by hot-melt.