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. 10, 2000
Filed:
Aug. 06, 1990
Applicant:
Inventor:
Bernd Lindinger, Presbaum/Wien, AT;
Assignee:
Elo-chem Atztechnik GmbH, Meersburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C23F / ; C23F / ;
U.S. Cl.
CPC ...
252 795 ; 252 792 ; 216 78 ; 216106 ;
Abstract
An electrolytically reclaimable etching solution for etching circuit boards and mold parts of copper and copper-based alloys, with a content of copper tetrammine sulfate, ammonia, ammonium sulfate, ammoniachloride, if necessary ammonium nitrate, and also a catalyzer for raising the etching rate. According to the invention, such an etching solution excels through a content of vanadium or a vanadium compound as a catalyzer in a concentration of 1 mg to 99 mg/l of etching solution, calculated as vanadium.