Method of making white diamond film

Details Method of making white diamond film Method of making white diamond film

C - Chemistry, Metallurgy

01

B

C01B 31/06 (2006.01) C23C 16/26 (2006.01) C23C 16/27 (2006.01) C30B 29/04 (2006.01)

Patent

CA 2112308

Diamond film with substantially no non-diamond carbon and a high thermal conductivity is deposited by means of a direct current arc jet apparatus with a substrate temperature below about 975 degrees Celsius, an arc power of between about 20 and 40 kw. a pressure of about 12 torr, and an enthalpy greater than 30 from a activated gas jet fed with hydrogen and methane, the methane being supplied at a concentration of less than 0.07%. The resulting material has a high transparency and thermal conductivity. Also disclosed is the use of the diamond material made by the present method for cutting tool applications, particularly milling.

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