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Method for the selective removal of high-k dielectrics

  • US 6,656,852 B2
  • Filed: 12/06/2001
  • Issued: 12/02/2003
  • Est. Priority Date: 12/06/2001
  • Status: Active Grant
First Claim
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1. A method of removing an exposed portion of a high-k dielectric layer from a substrate, comprising:

  • providing a substrate with a high-k dielectric layer;

    wet etching with a final etching solution consisting essentially of water, a strong acid, an oxidizing agent, and a fluorine compound;

    wherein the strong acid is not the same as the fluorine compound.

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