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HIGH COLOUR DIAMOND LAYER

  • US 20100015438A1
  • Filed: 06/22/2006
  • Published: 01/21/2010
  • Est. Priority Date: 06/22/2005
  • Status: Active Grant
First Claim
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1. A method of producing a CVD diamond layer having high colour comprising:

  • (i) providing a substrate;

    (ii) providing a CVD synthesis atmosphere in which there exists a first gas comprising a first impurity atom type which has a detrimental effect on the colour of the produced diamond layer; and

    (iii) adding into the synthesis atmosphere a second gas comprising a second impurity atom type,wherein the first and second impurity atom types are different;

    the type and quantity of the second impurity atom type is selected to reduce the detrimental effect on the colour caused by the first impurity atom type so as to produce a diamond layer having high colour;

    and the first and second impurity atom types are independently nitrogen or atoms which are solid in the elemental state.

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