Patent ID: 9466518
Filing Date: 2016-10-11
CPC Classification: G03F,H01J,H01L

Claim Text:
1. An electrostatic chuck device comprising: an electrostatic chuck section which has a base material having one principal surface as a placement surface on which a plate-shaped sample is placed, and an internal electrode for electrostatic adsorption that electrostatically adsorbs the plate-shaped sample to the placement surface, wherein an annular projection portion is provided at a peripheral border portion on the one principal surface, and a plurality of projection portions having the same height as the height of the annular projection portion are provided in an area surrounded by the annular projection portion on the one principal surface, an upper end portion of the annular projection portion and upper end portions of the plurality of projection portions are located on a concave surface with a central portion of the one principal surface as a basal plane, a base section for cooling is provided on the other principal surface side of the electrostatic chuck section, and a difference between a height from one principal surface of the base section for cooling of the annular projection portion and a height from one principal surface of the base section for cooling of the projection portion which is located in the vicinity of the center of the area is greater than or equal to 1 μm and less than or equal to 30 μm.