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Apparatus for improving the performance of a temperature-sensitive etch process

  • US 6,056,850 A
  • Filed: 01/09/1998
  • Issued: 05/02/2000
  • Est. Priority Date: 07/12/1996
  • Status: Expired due to Term
First Claim
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1. An apparatus for performing gas plasma etching of a semiconductor substrate comprising:

  • a) an enclosed chamber having upper, lower, and side walls for containing said semiconductor substrate, said chamber including a vacuum pump for evacuating said chamber;

    b) a gas distributor in said chamber;

    c) a spaced apart radio frequency electrode and grounded electrode in said chamber for generating gas plasma;

    d) at least one temperature probe comprising a fiber optic probe positioned in said chamber for monitoring the temperature at a selected location in said chamber; and

    e) a controller communicating with said radio frequency electrode and said at least one temperature probe, said controller adapted to terminate the generation of gas plasma when a predetermined temperature is reached at said selected location.

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