Plasma pressure control assembly

Adhesive bonding and miscellaneous chemical manufacture – Differential fluid etching apparatus – With microwave gas energizing means

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C23F 142

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active

053912527

ABSTRACT:
A plasma assembly including an RF head extending into a vacuum chamber and an associated electrode for generating a confined plasma. The assembly includes a sidewall within the chamber forming a plenum about the RF head. The plenum defines a volume substantially smaller than the volume of the chamber and hence, the gas pressure within the plenum is more easily monitored and controlled by the provision of make-up gas.

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