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:
Nov. 06, 2007
Filed:
May. 04, 2004
Michael Pavlov, Fairlawn, NJ (US);
Eugene Shalyt, Washington Township, NJ (US);
Peter Bratin, Flushing, NY (US);
Michael Pavlov, Fairlawn, NJ (US);
Eugene Shalyt, Washington Township, NJ (US);
Peter Bratin, Flushing, NY (US);
ECI Technology, Inc., Totowa, NJ (US);
Abstract
The 3-mercaptopropylsulfonic acid (MPSA) breakdown product of the bis(sodiumsulfopropyl)disulfide (SPS) additive used in acid copper plating baths accelerates copper electrodeposition and can be detected by cyclic voltammetric stripping (CVS) analysis. In the presence of oxygen, MPSA decomposes rapidly in acid copper sulfate baths so that the CVS stripping peak area (A) decreases on successive cycles. The slope of a plot of Avs. CVS cycle number (or time) or logarithm of the CVS cycle number (or time) provides a measure of the initial MPSA concentration.