Patent ID: 8730644

Claim:
A bipolar electrostatic chuck, at least comprising: an electrode layer including a first electrode and a second electrode; and an upper insulating layer which forms a substrate attracting surface for attracting a substrate, wherein in a case where a surface of the electrode layer is regarded to be divided into a plurality of virtual cells having a predetermined width (L) arranged in an x direction and a y direction, first electrode sections forming the first electrode and second electrode sections forming the second electrode are alternately arranged in the plurality of virtual cells in the x direction, and are alternately arranged in the plurality of virtual cells in the y direction, with a space (d) between the first electrode section and the second electrode section which are adjacent to each other, wherein the first electrode sections and the second electrode sections are disposed, so that a plurality of electrodeless portions having no electrode section are formed in the virtual cells, wherein, the substrate attracting surface of the upper insulating layer has protrusions protruding to the substrate side at a position corresponding to the electrodeless portion, so that top surfaces of the protrusions contact with the substrate to form the substrate attracting surface, and wherein the upper insulating layer comprises a film selected from the group consisting of a polyimide film, a silicone film, and a polyamide film.