Patent ID: 9543183
Date: 2017-01-10
CPC Classifications: H01L,Y10T

Claim:
1. A heated electrostatic chuck comprising: a base having an upper surface and peripheral side surfaces; a thermal barrier coating formed by plasma deposition directly on at least the upper surface of the base; at least one heating element formed directly on portions of the thermal barrier coating; an electrically insulating layer formed on the heating element and exposed portions of the thermal barrier coating; at least one chucking electrode formed on at least a portion of the electrically insulating layer; and a protective layer formed on the chucking electrode; wherein the thermal barrier coating is a ceramic material selected from the group consisting of yttria-stabilized zirconia, alumina, zirconia, ceria, gadolinia, yttria, and mixtures thereof; and wherein a porosity of the thermal barrier coating decreases from a side adjacent the base toward a side adjacent the electrically insulating layer to provide a decreasing porosity gradient and decreasing coefficient of thermal expansion gradient with increasing distance from the base member within the thermal barrier coating.