Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Involving measuring – analyzing – or testing
Reexamination Certificate
2007-03-06
2007-03-06
King, Roy (Department: 1742)
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Involving measuring, analyzing, or testing
C205S101000, C205S787000
Reexamination Certificate
active
10856619
ABSTRACT:
Suppressor and anti-suppressor additives in an acid copper sulfate plating bath are analyzed by the cyclic voltammetric stripping (CVS) method without cleaning or rinsing the cell between the two analyses. The suppressor analysis is performed first and the suppressor concentration in the resulting measurement solution is adjusted to a predetermined value corresponding to full suppression. This fully-suppressed solution is then used as the background electrolyte for the anti-suppressor analysis. This integrated analysis approach provides results comparable to those obtained with cell cleaning and rinsing between the analyses but significantly reduces the analysis time, consumption of expensive chemicals, and quantity of hazardous waste generated.
REFERENCES:
patent: 6280602 (2001-08-01), Robertson
patent: 6572753 (2003-06-01), Chalyt et al.
Bratin Peter
Kogan Alex
Pavlov Michael
Perpich Michael James
Shalyt Eugene
ECI Technology Inc.
King Roy
Leader William T.
Tench D. Morgan
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