Patent ID: 9725806
Date: 2017-08-08
CPC Classifications: C23C,H01J,H01L

Claim:
1. A pedestal for a semiconductor processing chamber, comprising: a body comprising a ceramic material, wherein a plurality of coplanar grooves are formed in a radial direction in a surface of the body; a ceramic plate bounding at least one side of the grooves; a plurality of heater elements encapsulated within the body; a hollow shaft comprising a ceramic material and coupled to the body, wherein the hollow shaft includes a plurality of channels that interface with the grooves in the body; and a dielectric insert having a plurality of channels formed therein disposed in the hollow shaft, wherein at least a portion of the channels in the dielectric insert comprise a curved portion having an end terminating at an end of at least one of the grooves formed in a surface of the body.