Patent ID: 7420143
Filing Date: 2008-09-02
Classification: C04B,H01L,H05B

Abstract:
1. A graphite article for use in an assembly for a semi-conductor processing environment, comprising a graphite core, a coating layer comprising pyrolytic graphite having an average thickness of 0.001″ to 0.10″, a protective coating layer disposed on a least a portion of the pyrolytic graphite coating layer, the protective coating layer comprising at least one of a nitride, carbide, carbonitride or oxynitride of elements selected from a group consisting of B, Al, Si, Ga, refractory hard metals, transition metals, and combinations thereof; and wherein the graphite article has a tensile strength of at least 25% higher than a corresponding graphite article without the pyrolytic graphite coating layer and the protective coating layer.