Method of producing colored diamond

FIELD: producing artificial diamonds.

SUBSTANCE: method comprises preparing diamond substrate virtually having no defects, preparing the initial gas, decomposing initial gas to produce the atmosphere for synthesis that nitrogen concentration of which ranges from 0.5 to 500 particles per million, and homogeneous epitaxy growth of diamond on the surface.

EFFECT: increased thickness of diamond.

40 cl, 9 dwg, 5 ex

 

The text descriptions are given in facsimile form.

1. A layer of single crystal diamond produced by the method of chemical deposition from the gas phase, the layer of okras is n and its thickness is more than 1 mm.

2. A layer of single crystal diamond according to claim 1, which has a decorative color.

3. A layer of single crystal diamond according to claim 2, in which the coating is decorative with a predominantly brown shade.

4. A layer of single crystal diamond according to claim 2, in which the painting is a decorative painting light orange-brown, orange-brown, pinkish-brown, pink-brown or dark brown.

5. A layer of single crystal diamond according to any one of claims 1 to 4, in which the angle corresponding to the color tone, is less than 80°.

6. A layer of single crystal diamond according to any one of claims 1 to 4, in which the angle corresponding to the color tone, is less than 75°.

7. A layer of single crystal diamond according to any one of claims 1 to 4, in which the angle corresponding to the color tone, is less than 70°.

8. A layer of single crystal diamond according to any one of claims 1 to 4, in which the thickness is more than 2 mm.

9. A layer of single crystal diamond according to any one of claims 1 to 4, in which the thickness is more than 3 mm.

10. A layer of single crystal diamond according to any one of claims 1 to 4, which has one or more characteristics (i), (ii), (iii)observed for the main part of the layer that includes at least 55% of the total volume of the layer:

(i) the bulk layer contains one or more defects and wired the x with the admixture of color centers, contribute to the absorption spectrum of the diamond, where the contribution to the absorption coefficient of one or more of the identified values of the wavelengths represented by the following characteristics:

(a) peak at 270 nm: contribution to the absorption coefficient at 270 nm in the range of 0.1 cm-1-30 cm-1; this peak begins at 220 nm and ends at 325 nm and has a maximum at 270 nm;

(b) the band at 350 nm: contribution to the absorption coefficient at 350 nm in the range of 0.3 cm-1-20 cm-1; this band begins at 270 nm and ends at 450 nm and has a maximum at 350 nm;

(C) band at 510 nm: the contribution to the absorbance at 510 nm in the range of 0.1 cm-1-10 cm-1; this band begins at 420 nm and ends at 640 nm and has a maximum at 510 nm;

(g) the band at 570/637 nm: the contribution to the absorbance at 570 nm in the range of 0.1 cm-1-5 cm-1; this band begins at 500 nm and ends at 640 nm and has a maximum at 570 nm;

(d) oblique section: contribution to the absorbance at 510 nm when the value is less than 3 cm-1; the contribution of the sloping plot of the absorption coefficient has the following approximate dependence on the wavelength: the absorption coefficient (cm-1) =×(wavelength in m)-3where C = constant;

(ii) the bulk layer contains centers, stipulated by the by the presence of defects and impurities, that contribute to the luminescence spectrum so that the normalized value of the luminescence intensity for the zero phonon line, measured by the method using the excitation luminescence argon ion laser with a wavelength of 514 nm at 77 K, corresponds to one or more of the following criteria:

(a) zero-phonon line at 575 nm: zero phonon line at 575 nm at 77 K has a normalized value of the intensity of luminescence in the range of 0.02-80; this peak begins at 570 nm and ends at 680 nm and has a maximum at 575 nm;

(b) zero-phonon line at 637 nm: zero phonon line at 637 nm at 77 K has a normalized value of the intensity of luminescence in the range of 0.01-300; this peak begins at 635 nm and ends at 800 nm and has a maximum at 637 nm;

(iii) the bulk layer of the diamond produced by the method of chemical deposition from the gas phase, characterized by the ratio of normalized values of luminescence at 637 nm/575 nm, measured by the method using the excitation luminescence argon ion laser with a wavelength of 514 nm at 77 K, which is in the range of 0.2-10.

11. The layer of single-crystal diamond of claim 10, in which the main volume includes at least 80% of the total volume of the layer.

12. A layer of monocrystalline diamond is about 10, in which the main volume includes at least 95% of the total volume of the layer.

13. A layer of single crystal diamond according to any one of 11 and 12, in which the main volume of the layer is formed in a single growth sector.

14. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond has a coefficient of absorption at 270 nm in the range of 0.4 cm-1-10 cm-1and corresponds to the peak at 270 nm, which begins at 235 nm and ends at 325 nm and has a maximum at 270 nm.

15. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond has a coefficient of absorption at 270 nm in the range of 0.8 cm-1-6 cm-1and corresponds to the peak at 270 nm, which begins at 235 nm and ends at 325 nm and has a maximum at 270 nm.

16. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond, is the absorption coefficient at 350 nm in the range of 1.0 cm-1-8 cm-1and corresponds to the band at 350 nm, which begins at 270 nm and ends at 450 nm and has a maximum at 350 nm.

17. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond, is the absorption coefficient at 350 nm in the range of 1.5 cm-1-6 cm-1and its what inspired the band at 350 nm, which starts at 270 nm and ends at 450 nm and has a maximum at 350 nm.

18. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond has a coefficient of absorption at 510 nm in the range of 0.2 cm-1-4 cm-1and corresponds to the band at 510 nm, which begins at 420 nm and ends at 640 nm and has a maximum at 510 nm.

19. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond has a coefficient of absorption at 510 nm in the range of 0.4 cm-1-2 cm-1and corresponds to the band at 510 nm, which begins at 420 nm and ends at 640 nm and has a maximum at 510 nm.

20. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond has a coefficient of absorption at 570 nm in the range of 0.3 cm-1-3 cm-1and corresponds to the band at 570/637 nm, which starts at 500 nm and ends at 640 nm and has a maximum at 570 nm.

21. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond has a coefficient of absorption at 570 nm in the range of 0.3 cm-1-1,5 cm-1and corresponds to the band at 570/637 nm, which starts at 500 nm and ends at 640 nm and has a maximum at 570 nm.

22. Koimonogatari diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond has a coefficient of absorption at 510 nm, which is less than 1.5 cm-1and corresponds to the inclined portion which has the following approximate dependence on the wavelength: the absorption coefficient (cm-1) =×(wavelength in m)-3where C = constant.

23. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond has a coefficient of absorption at 510 nm, which is less than 0.8 cm-1and corresponds to the inclined section, has the following approximate dependence on the wavelength: the absorption coefficient (cm-1) =×(wavelength in m)-3where C = constant.

24. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond has a coefficient of absorption at 575 nm in the range of 0.05 cm-1-60 cm-1in the curve of the normalized values of luminescence at 77 K and corresponds to the peak at 575 nm, which begins at 570 nm and ends at 680 nm and has zero photon maximum at 575 nm.

25. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond has a coefficient of absorption at 575 nm in the range of 0.2 cm-1-40 cm-1in the curve of the normalized values of the luminescence at 77 K and corresponds to the peak at 575 nm, which begins at 570 nm and ends at 680 nm and has zero photon maximum at 575 nm.

26. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond has a coefficient of absorption at 637 nm in the range of 0.02 cm-1-200 cm-1in the curve of the normalized values of luminescence at 77 K and corresponds to the peak at 637 nm, which begins at 635 nm and ends at 800 nm and has a zero phonon line at 637 nm.

27. The layer of single-crystal diamond of claim 10, where the center of the painting, which contributes to the absorption spectrum of the diamond has a coefficient of absorption at 637 nm in the range of 0.03 cm-1-100 cm-1in the curve of the normalized values of luminescence at 77 K and corresponds to the peak at 637 nm, which begins at 635 nm and ends at 800 nm and has a zero phonon line at 637 nm.

28. The layer of single-crystal diamond of claim 10, in which the ratio of normalized values of luminescence 637 nm/575 nm is in the range from 0.5 to 8.

29. The layer of single-crystal diamond of claim 10, in which the ratio of normalized values of luminescence 637 nm/575 nm is in the range from 2 to 5.

30. A layer of single crystal diamond, which is painted for the main volume, constituting at least 55% of the total layer spectrapure observed low-lying oblique section in the shape of the curve, growing from the branches according to: the absorption coefficient slope (cm-1) =×λ-3,

where C = constant, λ in m,

this inclined section has a coefficient of absorption at 510 nm, which is less than 3 cm-1and the main volume contains one or more defects or associated with the presence of impurities of color centers, which contribute to the absorption spectrum of the diamond, where the contribution to the absorption coefficient of one or more specified wavelengths has the following characteristics:

(a) peak at 270 nm: contribution to the absorption coefficient at 270 nm in the range of 0.1 cm-1-30 cm-1; this peak begins at 220 nm and ends at 325 nm and has a maximum at 270 nm;

(b) the band at 350 nm: contribution to the absorption coefficient at 350 nm is in the range of 0.3 cm-1-20 cm-1; this band begins at 270 nm and ends at 450 nm and has a maximum at 350 nm;

(C) band at 510 nm: the contribution to the absorbance at 510 nm is in the range of 0.1 cm-1-10 cm-1; this band begins at 420 nm and ends at 640 nm and has a maximum at 510 nm;

(g) the band at 570/637 nm: the contribution to the absorbance at 570 nm is in the range of 0.1 cm-1-5 cm-1; this band begins at 500 nm and sacancivaetsea 640 nm and has a maximum at 570 nm.

31. A method of obtaining a colored layer of monocrystalline diamond, including the stage of preparation of the diamond substrate having a surface that is essentially free from defects of crystallinity, the stage of preparation of the original gas phase decomposition of the source gas with the receiving environment for the synthesis, which contains from 0.5 to 500 ppm million of nitrogen calculated in the calculation of molecular nitrogen, and the stage homoepitaxial growth of diamond on the surface essentially free of defects in the crystal lattice.

32. The method according to p, in which the atmosphere for the synthesis contains from 1 to 100 min-1nitrogen in the calculation of molecular nitrogen.

33. The method according to p, in which the atmosphere for the synthesis contains nitrogen in a quantity appropriate to increase the size of the sector growth (100) and to reduce the size of competing growth sectors.

34. The method according to any of PP-33, in which the defect density is such that the surface features caused by etching and related defects, have a density of less than 5·l03/mm2.

35. The method according to any of PP-33, in which the defect density is such that the surface features caused by etching and associated with the formation of defects, have density below 102/mm2.

36. The method according to any of PP-33, in which the surface or the surface is, which is the growth of diamond by chemical vapor deposition from the gas phase, choose from surfaces(100), (110), 113) (111).

37. The layer of single-crystal diamond obtained by the method according to any of PP-36.

38. Jewelry stone, obtained from the layer of diamond according to any one of claims 1 to 30 and 37.

39. Jewelry stone in 38, with indicator of the quality of SI1 or higher.

40. Jewelry stone in 38, with indicator of the quality of VS1 or higher.



 

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