Patent ID: 7364624

Claim:
A wafer processing device comprising: a platform for supporting an object to be heated, the platform comprises a substrate having upper and lower relatively flat surfaces, the platform is comprised of graphite; a shaft extending substantially transverse to the platform, the shaft is comprised of graphite; a first coating on at least one of the flat surfaces, with said first coating composed of at least a material selected from the group consisting 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; a second coating layer composed of pyrolytic graphite disposed on the first coating in a patterned arrangement of predetermined geometry, the layer having at least two separate ends adapted for forming at least an electrode; and a top coating of a dielectric material superimposed on said first and second coatings, the top coating is composed of at least a material selected from the group consisting 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; wherein the graphite shaft and the graphite platform form a single unitary body, and wherein the graphite shaft is a rod with a hollow core, wherein the graphite shaft further includes at least two electrical conductors for connecting the electrode to an external source of power, each electrical conductor being in contact with, and surrounded by, dielectric material, wherein the two electrical conductors are symmetrically disposed on opposite sides of an exterior surface of the graphite shaft.