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. 26, 1993
Filed:
Aug. 04, 1992
Eric C Huenger, Seaford, NY (US);
Stanley W Tarry, Kings Park, NY (US);
Richard A Mayernik, Newark, DE (US);
AMP-AKZO Corporation, Newark, DE (US);
Abstract
An improved method of manufacturing electrolessly deposited copper is described. The copper deposits are useful in the manufacture of fully additive and partly additive plated-through hole, printed wiring boards. The copper is deposited from a bath containing a copper compound, a complexing agent for copper, a reducing agent for copper, a pH-adjusting agent and one or more addition agents. The improvement for producing highly stress resistant, copper deposits comprises controlling one or more plating bath parameters such as pH, complexing agents and sources of iron or chromium, so that the trace iron and/or chromium in the deposited copper is less than 2 mg/mole of copper.