Method of producing diamond-like carbon-coatings
First Claim
1. Method of producing diamond-like carbon coatings in which hydrocarbons and hydrogen, possible in the presence of a noble gas, are ionized by plasma discharge, comprising placing a substrate to be coated in a coating apparatus and evacuating the apparatus to a residual gas pressure of below 2×
- 10-5 mbar, then passing a hydrocarbon gas or a mixture of hydrocarbon gases and pure hydrogen onto the substrate to be coated which is at room temperature or cooled down to -100°
C., and producing around the substrate an oxygen-free plasma discharge by high-frequency excitation which is sustained by the gases admitted, the gases being excited, dissociated, ionized and accelerated toward the substrate during the plasma discharge, wherein the partial pressure of the hydrocarbon gas is adjusted between 10-3 and 1 mbar.
1 Assignment
0 Petitions
Accused Products
Abstract
Diamond-like, transparent, clear and uncolored carbon coatings with low internal stresses are generated on substrates by plasma discharge from the gas phase. For this purpose, a hydrocarbon gas or a mixture of hydrocarbon gases and pure hydrogen is admitted onto the substrate to be coated which is at room temperature. Around the substrate an oxygen-free plasma discharge is produced by high-frequency excitation which is sustained by the gases admitted. The gases are excited, dissociated ionized and accelerated toward the substrate during plasma discharge.
74 Citations
14 Claims
-
1. Method of producing diamond-like carbon coatings in which hydrocarbons and hydrogen, possible in the presence of a noble gas, are ionized by plasma discharge, comprising placing a substrate to be coated in a coating apparatus and evacuating the apparatus to a residual gas pressure of below 2×
- 10-5 mbar, then passing a hydrocarbon gas or a mixture of hydrocarbon gases and pure hydrogen onto the substrate to be coated which is at room temperature or cooled down to -100°
C., and producing around the substrate an oxygen-free plasma discharge by high-frequency excitation which is sustained by the gases admitted, the gases being excited, dissociated, ionized and accelerated toward the substrate during the plasma discharge, wherein the partial pressure of the hydrocarbon gas is adjusted between 10-3 and 1 mbar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- 10-5 mbar, then passing a hydrocarbon gas or a mixture of hydrocarbon gases and pure hydrogen onto the substrate to be coated which is at room temperature or cooled down to -100°
Specification