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DIAMOND MATERIAL

  • US 20120051996A1
  • Filed: 07/22/2009
  • Published: 03/01/2012
  • Est. Priority Date: 07/23/2008
  • Status: Active Grant
First Claim
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1. A method of preparing diamond material of high chemical purity and high isotopic purity comprising;

  • activating and/or dissociating providing a source gas mixture and a solid carbon source to form gaseous carbon species, the source gas mixture comprising high purity gases, wherein the concentration of nitrogen in the source gas mixture is about 300 ppb or less,the solid carbon source comprising 12C in an amount of at least about 99% of the total C content of the source, wherein the solid carbon source has a low nitrogen impurity content;

    andgrowing a homoepitaxial diamond layer on the surface of a substrate from the gaseous carbon species, the substrate surface being substantially free of crystal defects.

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