Patent ID: 7491432

Claim:
A ceramic susceptor for semiconductor manufacturing equipment, the ceramic susceptor comprising: a ceramic substrate, one side thereof having a wafer-retaining face; a resistive heating element provided either superficially or interiorly in said substrate; and a recess formed in said wafer-retaining face with room to carry a semiconductor manufacturing wafer, said recess constituted by a perimetric wall and a bottom face the entirety of which is planar, and being shaped such that the perimetric wall meets the bottom face to form an angle greater than 90° and less than 170° and so that the perimetric wall and the bottom face join in a circumferential verge having a radius of curvature of 0.1 mm or more, the bottom face being sized to receive a back side of the wafer such that the entire back side is in contact with the bottom face.