Patent ID: 6379491
Filing Date: 2002-04-30
Classification: F16B,H01J,H01L

Abstract:
An apparatus for treating a wafer under fabrication with an erosive plasma, in a contamination controlled environment, comprising:a chamber for containing the wafer to be treated by the plasma, and for isolating the wafer from contaminants external to the chamber during treatment, and one or more plasma erosion resistive screws, each having a shaft secured within the chamber so as to limit exposure of the shaft to the plasma, and a raised head which is integral with, and made of the same material as, the shaft, at least part of the raised head protruding into the chamber so as be exposed to the plasma to a greater extent than the shaft, the head of the screw having a continuous, uninterrupted outer-surface shape which is an uninterrupted, surface of rotation.