Polycrystalline diamond partially depleted of catalyzing material

  • US 6,589,640 B2
  • Filed: 11/01/2002
  • Issued: 07/08/2003
  • Est. Priority Date: 09/20/2000
  • Status: Expired due to Term
First Claim
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1. A polycrystalline diamond element comprising a body with a working surface, wherein a first volume of the body remote from the working surface contains a catalyzing material, a second volume of the body adjacent to the working surface is substantially free of the catalyzing material, wherein the second volume extends to a depth of at least about 0.1 mm from the working surface.

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