C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
73/102, 128/111,
C23C 16/26 (2006.01) C23C 16/27 (2006.01) C23C 16/56 (2006.01) G01N 1/06 (2006.01)
Patent
CA 1337560
An edged medical tool, such as a scalpel or an injection needle, is imparted with unexpectedly improved incisiveness by first providing a carbonaceous coating of from 1 to 20 nm thickness having a crystalline diamond structure by a method of plasma-induced vapor-phase deposition in an atmosphere of a mixture of hydrogen gas and a hydrocarbon gas at a microwave frequency of from 1 to GHz and then etching the thus formed diamond-like coating layer in a plasma of hydrogen gas to such an extent that the etched surfaced has a roughness of from 0.5 to 5 nm.
597482
Iida Tamaki
Kitamura Hajime
G. Ronald Bell & Associates
Shin-Etsu Chemical Co. Ltd.
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