Patent ID: 10269543

Abstract:
A lower electrode 2 includes a conductive base member 2a to which a high frequency power is applied; an electrostatic chuck 6, having an insulating layer 6b formed on a top surface of the base member 2a to cover an electrode 6a, configured to electrostatically attract a semiconductor wafer W as a target of a plasma process onto the insulating layer 6b; a focus ring 5 provided on a top surface of the insulating layer 6b of the electrostatic chuck 6 to surround the semiconductor wafer W; and a thermally sprayed film 100, which is conductive and formed on a portion of the insulating layer 6b of the electrostatic chuck 6 positioned between the focus ring 5 and the base member 2a by using a composite material in which titania is added to an insulating material for the insulating layer at a preset weight ratio.