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. 05, 2011
Filed:
Jul. 09, 2008
Applicants:
Ryuichiro Kogure, Osaka, JP;
Tadahiro Yokozawa, Chiba, JP;
Hiroaki Yamaguchi, Chiba, JP;
Osamu Nakayama, Kanagawa, JP;
Inventors:
Ryuichiro Kogure, Osaka, JP;
Tadahiro Yokozawa, Chiba, JP;
Hiroaki Yamaguchi, Chiba, JP;
Osamu Nakayama, Kanagawa, JP;
Assignee:
Ube Industries, Ltd., Yamaguchi, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01K 3/10 (2006.01); H05K 7/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A flexible circuit printable board can be favorably produced by a process composed of steps of forming in a polyimide film having a metal coat on each surface side a via hole penetrating at least one metal coat and the polyimide film; and applying a mixture of liquid and abrasive grains under pressure onto the via hole, whereby smoothing an edge of the via hole and cleaning the via hole.