Thermally stable diamond polycrystalline diamond constructions

  • US 7,608,333 B2
  • Filed: 12/22/2004
  • Issued: 10/27/2009
  • Est. Priority Date: 09/21/2004
  • Status: Active Grant
First Claim
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1. A thermally stable diamond construction comprising:

  • a substrate; and

    a diamond body attached to the substrate and comprising a plurality of bonded diamond crystals and a plurality of interstitial regions disposed among the bonded diamond crystals,the diamond body including a top surface and a side surface extending away from the top surface, andthe diamond body comprising;

    a first region of the diamond body being substantially free of a Group VIII metal, and the first region extending into the diamond body from the top surface a partial depth between about 0.02 mm and 0.09 mm and a partial depth along a partial length of the side surface, wherein the partial length extends substantially uniformly around a circumference of the diamond body along at least 50% of the side surface; and

    a second region adjacent the first region, the second region comprising the Group VIII metal.

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