Patent ID: 6572933
Filing Date: 2003-06-03
Classification: C23C,H01J

Abstract:
A method for forming an adherent coating on a substrate comprising the steps of:(a) applying a first, negative-pulsed bias voltage to the substrate and immersing the biased substrate in a plasma containing atoms which bond to the coating, such that ions of the atoms which bond to the coating are formed in the plasma and are injected into the surface of the substrate, forming thereby a compositionally graded surface thereon; (b) thereafter applying a second, negative-pulsed bias voltage to the substrate having the compositionally graded surface and immersing the substrate having the compositionally graded surface in a plasma containing gaseous precursor species, thereby forming an initial coating on the surface thereof; and (c) thereafter applying a third pulsed, negative bias voltage to the initial coated substrate and immersing the initial coated substrate in a plasma containing inert gas ions such that intrinsic stress experienced by the initial coating is reduced, whereby the adherent coating is formed on the surface of the substrate.