Method of producing diamond of controlled quality and product pr

Details Method of producing diamond of controlled quality and product pr Method of producing diamond of controlled quality and product pr

1996-04-01

1999-03-16

Lewis, Michael

Coating processes

Direct application of electrical, magnetic, wave, or...

Plasma

423446, C01B 3106

Patent

active

058827404

ABSTRACT:
A method is provided for efficiently producing an entirely quality-controlled CVD diamond. A CVD process is interrupted at an early stage and the deposit is taken out of the reaction chamber, before a significant mass is accumulated, and is inspected by means of cathodoluminescence. The spectrum are compared with a given reference in terms of peak position, half width and 20%-value width in coordination. The observed deviation allows to determine whether to maintain or alter the settings.
A diamond substance of acceptable quality which is properly specified in terms of the CL parameters is also provided.

REFERENCES:
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patent: 5114696 (1992-05-01), Purdes
patent: 5474021 (1995-12-01), Tsuno et al.
patent: 5510157 (1996-04-01), Chen et al.
Yokota et al, "Effect of Doping With Nitrogen and Boron on Cathodo-Luminescene of CUD Diamond", Mot. Res. Symp. Proc. vol. 162 pp. 231-236 1990 No Month.

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