Patent ID: 7601405

Claim:
A process for producing a layer system for the protection against wear, for the protection against corrosion and for improving the sliding properties, having an adhesive layer for the arrangement on a substrate, a transition layer for the arrangement on the adhesive layer and a cover layer of an adamantine carbon, comprising a) charging the substrate into a vacuum chamber and pumping down to a vacuum of a starting pressure of less than 10 −4 mbar, preferably 10 −5 mbar, b) cleaning a surface of the substrate, c) plasma-aided vapor-depositing of the adhesive layer on the substrate, d) applying the transition layer to the adhesion layer by simultaneous plasma-aided vapor depositing of adhesion layer constituents and depositing carbon from the gas phase, e) applying the adamantine carbon layer on the transition layer by a plasma-aided depositing of carbon from the gas phase, wherein at least during process steps c), d) and e), a substrate bias voltage is applied to the substrate, and at least during process steps d) and e), the plasma is stabilized by a longitudinal magnetic field, and wherein the magnetic flux course of the magnetic field is produced by two electromagnetic coils bounding the vacuum chamber on opposite sides thereof and current is introduced such that a mutually reinforcing magnetic field is created which is directed in the same direction at both coils, or the magnetic flux course of the magnetic field is also produced by only one coil for a smaller chamber, and the magnetic field is variable with respect to time and space for counteracting secondary plasmas in that the coil currents are displaced together with one another or are displaced against one another.