Method and system for target lifetime

Chemistry: electrical and wave energy – Processes and products – Coating – forming or etching by sputtering

Reexamination Certificate

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C204S298120

Reexamination Certificate

active

10810534

ABSTRACT:
A method and system for determining a lifetime of a target for a physical vapor deposition tool (302), has, a mapping table (304a) of criteria for a minimum accumulating rate of Δ wafers fabricated by Δ target life for a target in the tool; and a database (304) recording Δ wafers fabricated by Δ target life for a target in the tool; and a computer (306) retrieving the criteria from the mapping table and entering the criteria in the database; and the tool (302) reporting Δ wafers fabricated by Δ target life for a target in the tool (302) for comparison with the criteria.

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patent: 2004/0020769 (2004-02-01), Ivannov et al.
patent: 2005/0236266 (2005-10-01), Poole et al.

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