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. 11, 1995
Filed:
Jan. 26, 1994
Applicant:
Inventor:
David Goad, Barrington, IL (US);
Assignee:
KDK Corporation, Ibaraki, JP;
Primary Examiner:
Int. Cl.
CPC ...
B44C / ; C23F / ;
U.S. Cl.
CPC ...
156651 ; 156656 ; 1566591 ; 156665 ; 156904 ; 20412935 ; 20412965 ; 428601 ; 428612 ;
Abstract
A method of etching increases the surface area of a metal foil by creating uniformly distributed etch tunnels. The foil is pretreated by depositing a discontinuous surface layer of metal that is cathodic to the foil, followed by chemically etching the foil to remove a portion of the deposited metal. Finally, the foil is electrochemically etched to create the etch tunnels.