Encapsulated wafer processing device and process for making thereof

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A wafer processing device for use in semiconductor wafer processing applications as an Electro-Static Chuck (ESC) comprising a graphite substrate and at least one electrode pattern, wherein the grooves in the electrode pattern are filled with insulating or semiconducting material selected from a group consisting of B, Al, Si, Ga, refractory hard metals, transition metals, and rare earth metals, or complexes and/or combinations thereof, forming a substantially planar surface. The substantially planar surface is then coated with at least a semiconducting 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 rare earth metals, or complexes and/or combinations thereof.