Patent ID: 9721822
Date: 2017-08-01
CPC Classifications: H01J,H01L

Claim:
1. An electrostatic chuck apparatus comprising: an electrostatic chuck section, one main surface of which is a placing surface for placing a specimen, and which is equipped with an internal electrode for electrostatic adsorption; an annular focus ring section which is provided so as to surround the electrostatic chuck section; a cooling base section which is provided on the other main surface side of the electrode chuck section to cool the electrostatic chuck section and the focus ring section, the focus ring section includes an annular focus ring, an annular ceramic plate which is adhered to a lower surface of the focus ring, a sheet-like heater portion which is provided between the annular ceramic plate and the cooling base section, and is formed from a non-magnetic metal, and an electrode section which supplies electricity to a heater section, the heater section is fixed to the annular ceramic plate by a first insulating adhesive layer, is fixed to the cooling base section by a second insulating adhesive layer, and is insulated by the first insulating adhesive layer and the second insulating adhesive layer, and a cooling medium gas is circulated between the annular focus ring section and the annular ceramic plate.