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. 15, 2003
Filed:
Oct. 02, 2001
Applicant:
Inventors:
Tomohiko Yamamoto, Yamaguchi, JP;
Takuji Takahashi, Yamaguchi, JP;
Kohji Narui, Yamaguchi, JP;
Hiroto Mitsui, Yamaguchi, JP;
Norihisa Komoda, Yamaguchi, JP;
Assignee:
Ube Industries, Ltd., Yamaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 2/708 ; B32B 1/508 ; B32B 7/02 ;
U.S. Cl.
CPC ...
B32B 2/708 ; B32B 1/508 ; B32B 7/02 ;
Abstract
An aromatic polyimide film of polyimide composed of a 3,3′,4,4′-biphenyltetracarboxylic acid component and a p-phenylenediamine component, which has a thickness of 35 to 55 &mgr;m and is employed for manufacturing a polyimide film/metal film laminate, preferably has a linear thermal expansion coefficient of 17×10 to 24×10 cm/cm/° C. (TD) in the temperature range of 50-200° C., and a modulus of tensile elasticity of 700 kgf/mm or more (TD), and has a surface having been subjected to discharge treatment.