CMP slurry additive for foreign matter detection

Cleaning and liquid contact with solids – Processes – Including application of electrical radiant or wave energy...

Reexamination Certificate

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C438S693000

Reexamination Certificate

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06857434

ABSTRACT:
A method and structure polishes and cleans silicon wafers by mixing a marker with a slurry to form a slurry mixture, performs chemical mechanical polishing on a silicon wafer using the slurry mixture, rinses the slurry mixture from the silicon wafer, checks the silicon wafer for marker residue, and repeats the rinsing process if the checking process detects the marker residue on the wafer.

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Burke, P., et al., “Evaluation of Contaminant-Induced Charge from Oxide Chemical-Mechanical Polish”, Proceedings of the SPIE—The International Society for Optical Engineering Conference, Title: Proc. SPIE—Int. Soc. Opt. Eng. (USA), vol. 2638, p. 27-37, 1995.

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