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Heating device for semiconductor wafers

  • US 5,970,214 A
  • Filed: 05/14/1998
  • Issued: 10/19/1999
  • Est. Priority Date: 05/14/1998
  • Status: Expired due to Term
First Claim
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1. An apparatus for heat treating semiconductor wafers comprising:

  • a thermal processing chamber adapted to contain a semiconductor wafer; and

    a heating device in communication with said thermal processing chamber for heating a semiconductor wafer contained in said chamber, said heating device comprising concentric rings of light energy sources for heating different radial locations on said semiconductor wafer, at least certain of said concentric rings of said light energy sources being separated by at least one tuning source, said at least one tuning source being configured to only emit a lesser amount of light energy than any adjacent concentric ring of light energy sources, said at least one tuning source supplying predetermined amounts of light energy in between said concentric rings for more uniformly heating said semiconductor wafer.

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