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:
Dec. 12, 1995
Filed:
Nov. 24, 1993
Applicant:
Inventors:
Assignee:
Nippon Paint Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25D / ; C25D / ;
U.S. Cl.
CPC ...
2041802 ; 2041806 ; 205125 ; 205229 ; 205920 ;
Abstract
Water spotting which occurs during rinsing of an electrodeposited photosensitive resist composition on a copper layer of a printed circuit board is reduced by applying an aqueous solution containing a surfactant. The surfactant is preferably a salt of an acylated polypeptide which is solid at ambient room temperature and forms a thin uniform film when the solution is dried.