Patent ID: 7192483
Filing Date: 2007-03-20
Classification: C23C

Abstract:
1. Method for diamond coating of substrates in which the substrate is exposed in a vacuum atmosphere to a reactive gas mixture excited by means of a plasma discharge, the plasma discharge comprising a plasma beam ( 14 ) in an evacuated receiver ( 16 ) that is formed between a cathode chamber ( 1 ) and an anode ( 2 ), and the reactive gas mixture comprising a reactive gas and a working gas, the reactive gas in ( 9 ) and the working gas in ( 8 ) and/or ( 9 ) introduced into the receiver, and the receiver ( 16 ) is evacuated by a pump arrangement ( 15 ), and the hydrogen concentration of the reactive gas mixture being 0–20 vol. % and the H 2 concentration of the reactive gas mixture is chosen such that the diamond coating has an average crystallite size of less than 50 nm.