Patent ID: 8663391
Filing Date: 2014-03-04
Classification: H01L,Y10T

Abstract:
1. An electrostatic chuck for receiving a substrate in a process chamber, the chuck comprising: (a) a ceramic puck comprising (i) a substrate receiving surface having a plurality of raised plateaus defined by spaced apart mesas, the raised plateaus being distributed across the substrate receiving surface in a non-symmetrical pattern, (ii) an opposing backside surface, and (iii) central and peripheral portions; (b) a plurality of heat transfer gas conduits traversing the ceramic puck and terminating in ports on the substrate receiving surface to provide heat transfer gas to the substrate receiving surface; (c) an electrode embedded in the ceramic puck to generate an electrostatic force to retain a substrate placed on the substrate receiving surface; and (d) a plurality of heater coils embedded in the ceramic puck, the heater coils being radially spaced apart and concentric to one another.