Processing silicon wafers employing processing gas atmospheres o

Coating processes – Electrical product produced – Condenser or capacitor

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427 93, 427 95, H01L 21316

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active

043767966

ABSTRACT:
At atmosphere X and an atmosphere Y, which may be an oxidizing atmosphere, are used in a process wherein silicon wafers are processed in a processing chamber, which is pressurized sequentially with a purging atmosphere, with the atmosphere X, and with the atmosphere Y displacing the atmosphere X excpet for a residual portion remaining with the atmosphere X and diminishing in concentration with time. As the atmosphere X has a molecular weight approximating the molecular weight of the atmosphere Y, stratification is minimized. If the atmosphere Y is steam, the atmosphere X may be a premixture of helium and oxyen.

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