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:
May. 04, 1993
Filed:
Mar. 17, 1992
Applicant:
Inventor:
John L Cordani, Waterbury, CT (US);
Assignee:
MacDermid, Incorporated, Waterbury, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B44C / ; C23F / ; C09K / ;
U.S. Cl.
CPC ...
156651 ; 156656 ; 156666 ; 156902 ; 752 793 ; 134-3 ;
Abstract
After the stripping or etching away of metal to expose surface areas of insulating resin material in a printed circuit process based upon metal-clad insulating substrate material, the exposed surface areas of insulating material are contacted with a liquid treatment composition, comprised of an aqueous acidic solution containing fluoride ion, effective to remove from the surface areas residual metal species otherwise associated therewith, such that the surface insulation resistance afforded by the insulating surface areas of the printed circuit is improved.