Patent ID: 8414735

Claim:
A mounting table for mounting thereon a substrate comprising: a lower electrode to which a high frequency power is supplied to generate a plasma to thereby process the substrate; an electrostatic chuck for holding the substrate thereto by using an electrostatic adsorptive force, wherein the electrostatic chuck is disposed on the lower electrode and a diameter of the electrostatic chuck is smaller than a diameter of the substrate; an electrode plate disposed in the electrostatic chuck; an inner ring-shaped member provided on the lower electrode to surround the electrostatic chuck, a part of the lower electrode, and an outer periphery of the substrate; a covering member provided to surround the lower electrode and the outer periphery of the inner ring-shaped member; and an outer ring-shaped member provided on the covering member to surround an outer periphery of the inner ring-shaped member, wherein the outer ring-shaped member includes a plurality of stacked plates, including: an upper ring-shaped plate having an upper surface facing a processing space where the substrate is processed, and a lower ring-shaped plate mounting thereon the upper ring-shaped plate, the lower ring-shaped plate being mounted on the covering member, and wherein a plurality of protrusions is formed on a lower surface of the upper ring-shaped plate by way of which the lower surface of the upper ring-shaped plate is in point contact with the lower ring-shaped plate.