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. 31, 1987
Filed:
Nov. 09, 1984
Applicant:
Inventor:
Edward T Spacer, Harleysville, PA (US);
Assignee:
American Electronic Laboratories, Inc., Lansdale, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B44C / ;
U.S. Cl.
CPC ...
156656 ; 1566591 ; 156664 ; 156902 ; 252 792 ; 204 321 ;
Abstract
A method for producing high resolution etched circuit patterns from a metal clad laminate of a conductive species on a nonconductive substrate is provided. The laminate is etched with an etchant solution for the conductive species to form a circuit pattern. The etched laminate is contacted with an oxidizing agent and aqueous acid to remove redeposited conductive species from the exposed substrate adjacent the circuit pattern. The side walls of the resulting circuit pattern are substantially vertical and free of 'halo'.