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:
Mar. 14, 2000
Filed:
Sep. 24, 1997
Applicant:
Inventors:
Wade Sonnenberg, Upton, MA (US);
John J Bladon, Marlborough, MA (US);
David Oglesby, Marlborough, MA (US);
Jeffrey P Burress, Bristow, VA (US);
Assignee:
Shipley Company, L.L.C., Marlborough, MA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25D / ; H05K / ;
U.S. Cl.
CPC ...
205125 ; 205183 ; 205210 ; 205917 ;
Abstract
A microetch composition for a circuit board containing sulfuric acid in combination with a carboxylic acid having 2 to 6 carbon atoms, wherein the volume of the carboxylic acid is preferably greater than the amount of sulfuric acid. The method discloses the contacting of a electrically conductive polymer with the microetch composition disclosed above to expose copper underlying the electrically conductive polymer.