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. 18, 2011
Filed:
Apr. 26, 2005
Kazuhiro Ono, Otsu, JP;
Kan Fujihara, Otsu, JP;
Takaaki Matsuwaki, Shizuoka, JP;
Kaneka Corporation, Osaka-shi, JP;
Abstract
The present invention relates to an adhesive film with which a flexible metal-clad laminate is obtained with suppressed dimensional changes occurred when produced by a laminating method; and a flexible metal-clad laminate comprising the adhesive film and a metal foil bonded thereto. The adhesive film comprises a polyimide film and, formed on at least one side thereof, an adhesive layer comprising a thermoplastic polyimide and has coefficients of linear expansion satisfying the relationship 1.0>(coefficient of linear expansion in the MD direction)/(coefficient of linear expansion in the TD direction)>0.1. This adhesive film may be one produced continuously and further satisfying the relationship 1.70>(elastic modulus in the MD direction)/(elastic modulus in the TD direction)>1.05 when the adhesive film has an MD modulus of 5 GPa or higher throughout the whole width thereof. That adhesive film may be one produced continuously and further satisfying the relationship 2.00>(elastic modulus in the MD direction)/(elastic modulus in the TD direction)>1.10 when the adhesive film has an MD modulus less than 5 GPa throughout the whole thereof.