Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Involving measuring – analyzing – or testing
Reexamination Certificate
2005-12-23
2008-09-23
Tsang-Foster, Susy (Department: 1795)
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Involving measuring, analyzing, or testing
C205S083000, C205S101000, C205S296000, C205S787000
Reexamination Certificate
active
07427344
ABSTRACT:
The present invention relates to a method and apparatus for determining organic additive concentrations in a sample electrolytic solution, preferably a copper electroplating solution, by measuring the double layer capacitance of a measuring electrode in such sample solution. Specifically, the present invention utilizes the correlation between double layer capacitance and the organic additive concentration for concentration mapping, based on the double layer capacitance measured for the sample electrolytic solution.
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Han Jianwen
King MacKenzie E.
Advanced Technology & Materials Inc.
Chappuis Maggie
Hultquist Steven J.
Intellectual Property / Technology Law
Leader William T
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