Patent ID: 9412635
Filing Date: 2016-08-09
CPC Classification: B23Q,H01L

Claim Text:
1. An electrostatic chuck device comprising: an electrostatic chuck part that has a placement surface for placing a plate-shaped sample and has an internal electrode for electrostatic attraction built therein; and a cooling base part that cools the electrostatic chuck part, wherein the electrostatic chuck part and the cooling base part are integrally adhered to each other via a first adhesive layer, wherein the electrostatic chuck part and the cooling base part are formed with a cooling gas hole passing through the electrostatic chuck part and the cooling base part and/or a pin-inserting hole allowing a pin for attaching/detaching the plate-shaped sample to be inserted thereinto, and wherein an insulator having a double pipe structure including a first insulator and a second insulator provided coaxially with an outer peripheral portion of the first insulator is provided in any one or both of the cooling gas hole and the pin-inserting hole so as to cover at least an exposed surface of the first adhesive layer.