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. 04, 2005
Filed:
Mar. 21, 2003
Applicants:
Takuji Takahashi, Yamaguchi, JP;
Toshihiko Anno, Yamaguchi, JP;
Kohji Narui, Yamaguchi, JP;
Shozo Katsuki, Yamaguchi, JP;
Inventors:
Takuji Takahashi, Yamaguchi, JP;
Toshihiko Anno, Yamaguchi, JP;
Kohji Narui, Yamaguchi, JP;
Shozo Katsuki, Yamaguchi, JP;
Assignee:
Ube Industries, Ltd., , JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B32B 2708 ; B32B 2734 ; B32B 704 ; B32B 1508 ; C08G 7310 ;
U.S. Cl.
CPC ...
Abstract
An aromatic polyimide film for producing an electro-conductive sealing element of a packaged semi-conductor device, has a thickness of 20 to 60 μm, a moisture vapor transmission coefficient of 0.05 to 0.8 g/mm/m·24 hrs, a water absorption ratio of 2.0% or less, and an elastic modulus in tension of 5,000 MPa or more, in which a surface of the polyimide film has been treated with reduced-pressure plasma discharge.