Patent ID: 8270141
Filing Date: 2012-09-18
Classification: H01L,Y10T

Abstract:
1. An electrostatic chuck, comprising: a body having a notched upper peripheral edge, defined by a first surface perpendicular to a sidewall of the body and a stepped second surface disposed between the first surface and an upper surface of the body, and a plurality of holes disposed through the body along the first surface of the notched upper peripheral edge; a plurality of fasteners disposed through respective ones of the plurality of holes to couple the body to a base disposed beneath the body; a dielectric member disposed above the upper surface of the body to electrostatically retain a substrate disposed thereon; an insulator ring disposed about the body and within the notched upper peripheral edge, the insulator ring having a stepped inner sidewall that mates with the stepped second surface of the notched upper peripheral edge to define a non-linear interface therebetween; and an edge ring disposed over the insulator ring, wherein the non-linear interface limits arcing between the edge ring and the fastener when RF power is applied to the electrostatic chuck.