Monocrystal chemical vapor deposition diamond synthesis material with uniform color

Monocrystal chemical vapor deposition diamond synthesis material with uniform color

  • CN 104,854,267 B
  • Filed: 09/13/2013
  • Issued: 04/09/2019
  • Est. Priority Date: 09/19/2012
  • Status: Active Grant
First Claim
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1. a kind of blue-colored single crystal CVD synthetic diamond material, it includes:

  • Multiple layers;

    Wherein the multiple layer includes at least two groups layer, at least two groups layer they defect composition and color in terms of notTogether,The wherein respective defect type of at least two groups layer, defect density and thickness degree are as follows;

    if by the monocrystalline of the coloringCVD diamond material is made round bright formula cutting diamond, and the bright formula cutting diamond of the circle includes table top and vertex (vertices),And have the table top greater than 1mm to vertex (vertices) depth, then at least by seeing on direction of the table top to vertex (vertices) in standard environmentWhen observing by the naked eye under the conditions of examining, the bright formula cutting diamond of the circle includes uniform color,Wherein at least two groups layer includes first group of layer and second group of layer, and first group of layer includes boron dope agent, which mixesMiscellaneous dose of concentration is enough to generate blue-colored, boron dope agent of the second group of layer comprising low concentration,Wherein first group of layer includes the uncompensated boron dope agent concentration for being not less than 0.01ppm and being not more than 5.00ppm,Wherein second group of layer includes concentration not less than 0.05ppm and no more than the monosubstituted nitrogen dopant of 5ppm, describedNitrogen concentration in second group of layer is sufficiently low so that it will not influence the whole blue color of layering single crystal CVD synthetic diamond materialDegree, and wherein the thickness degree of second group of layer is greater than first group of layer,Wherein the quality factor (FM) of the visibility of individual layer are not more than 0.15, wherein calculate individual layer by following product canThe quality factor of opinion property;

    solid in thickness degree (mm) ×

    first group layer of thickness degree (mm) ×

    second group layer of first group of layer of FM=Boron concentration (ppm) ×

    circle cuts bright formula depth (mm).

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