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:
Oct. 25, 1994
Filed:
Dec. 06, 1993
Applicant:
Inventors:
Gary R Sutcliffe, Kensington, CT (US);
Jay B Conrod, Cheshire, CT (US);
Assignee:
Enthone-OMI Inc., West Haven, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B44C / ; B29C / ; C23F / ;
U.S. Cl.
CPC ...
156656 ; 156666 ; 156668 ; 156902 ; 428209 ; 428901 ; 427304 ; 427307 ;
Abstract
A method for the manufacture of printed circuit boards is provided comprising conditioning the board, activating with a catalytic metal, post-activating, stabilizing and etching the copper surfaces before the desired circuit is formed on the board. This process eliminates the need for a flash coating of copper in the through holes before the use of protective coatings such as imaging resists and soldermasks.