Controlling the thickness of wafers during the...

Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Involving measuring – analyzing – or testing

Reexamination Certificate

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C204S228700

Reexamination Certificate

active

07914657

ABSTRACT:
Embodiments of the present invention pertain to controlling thickness of wafers during electroplating process. Information pertaining to an old current used during an electroplating process of a previous wafer is received. Information pertaining to the thickness of the previous wafer is received. A new current is automatically determined. The new current is to be used during an electroplating process for a new wafer. The new current is determined based on the information pertaining to the old current and the information pertaining to the thickness of the previous wafer.

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Battaglia “Regression-Based Statistical Process Control” AMP Journal of Technology, vol. 3 Nov. 1993 pp. 38ff.
Venkatesan “Performance Analysis of an Integral Controller” International Journal of Production Research, vol. 3 No. 16 2001 pp. 3671-3683.

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