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:
Nov. 18, 2008
Filed:
Jun. 29, 2005
Kenji Uhara, Aich, JP;
Kenji Uhara, Aich, JP;
Du Pont Toray Company Limited, Tokyo, JP;
Abstract
A multi-layer polyimide film including two or more laminated polyimide film layers is provided, with at least one of the two or more polyimide film layers is obtained by imidizing a polyamic acid derived from the reaction of at least one aromatic diamine containing 1-100 mol percent of carboxy-4,4'-diaminobiphenyl represented by the following formula, wherein m and n represent integers of 4 or less, including 0, and (m+n) is an integer of 1 or greater, and at least one aromatic tetracarboxylic dianhydride or a derivative thereof. Methods for obtaining a multi-layer polyimide film laminate can exhibit a peel strength of 10N/cm when laminated to a metal foil using an adhesive and can have a water absorption value of less than 3.0 weight percent.