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DETECTION OF CLEARANCE OF POLYSILICON RESIDUE

  • US 20080138988A1
  • Filed: 12/07/2007
  • Published: 06/12/2008
  • Est. Priority Date: 12/07/2006
  • Status: Abandoned Application
First Claim
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1. A method of detecting an endpoint during polishing of polysilicon, comprising:

  • polishing a substrate having polysilicon residue on an area of oxide; and

    optically detecting clearance of the polysilicon residue.

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