Patent ID: 6110329
Filing Date: 2000-08-29
Classification: C23C

Abstract:
A method of manufacturing a composite material structure consisting of a substrate and a layer including sp.sup.2 - and sp.sup.3 -hybridized carbon having an interface area with the substrate and an exposed surface, said layer having a sp.sup.3 -hybridized carbon proportion which increases from said interface area toward said exposed surface, said method comprising the steps of:a) depositing by physical vapor deposition (PVD) on said substrate carbon to form said carbon layer from a graphite target using a magnetron sputtering apparatus in a process chamber in which an argon partial pressure of 0.6 to 1.0 Pa is maintained, andb) maintaining, during the deposition of said carbon layer, between said target and said substrate a bias voltage for applying an impulse to the carbon layer being formed on said substrate, and increasing the bias voltage with increasing layer thickness from 0 Volts to 300 Volts in such a way that the impulse application to said layer is continuously or discontinuously increased.