Patent ID: 9685356
Date: 2017-06-20
CPC Classifications: H01J,H01L,Y10T

Claim:
1. An electrostatic chuck comprising: a ceramic body having a first ceramic material composition; a thermally conductive base bonded to a lower surface of the ceramic body; and a plasma resistant protective layer bonded to an upper surface of the ceramic body by a metal bond that is substantially in direct physical contact with the ceramic body and the plasma resistant protective layer, the plasma resistant protective layer comprising a bulk sintered ceramic article having a second ceramic material composition that is different from the first ceramic material composition, wherein the metal bond functions as an electrode of the electrostatic chuck, and wherein the metal bond comprises: an electrode connection, formed in the ceramic body, that is to electrically connect the metal bond to at least one of a power source or a radio frequency source, the electrode connection comprising a hole filled with an electrically conductive material.