Patent ID: 7446284
Filing Date: 2008-11-04
Classification: H01L,Y10S,Y10T

Abstract:
1. A wafer processing apparatus comprising a platform for placement of an object of various sizes to be processed, the platform comprising: a base substrate comprising at least one of an oxide, nitride, oxynitride of B, Si, Ga, and combinations thereof; a film electrode deposited upon the base substrate; at least a coating layer disposed on the film electrode, the coating layer comprising at least one of a nitride, carbide, carbonitride, oxynitride of elements selected from a group consisting of B, Al, Si, Ga, refractory hard metals, transition metals, and combinations thereof; wherein the film electrode has a coefficient of thermal expansion (CTE) in a range of 0.75 to 1.25 times that of the base substrate and the coating layer respectively; and wherein the base substrate is electrically insulating, and wherein the base substrate has a volume resistivity greater than 10 8 Ω-cm at 25° C.