Patent ID: 9209060
Filing Date: 2015-12-08
Classification: H01J,H01L

Abstract:
1. A mounting table structure including an electrostatic chuck at a central region thereof and a base member that mounts thereon a focus ring along a periphery of the electrostatic chuck, the mounting table structure comprising: a sheet, having elasticity and thermal conductivity, provided between the focus ring and the base member; a pressing member provided along a periphery of the focus ring, and configured to press the focus ring toward the base member to contract the sheet; and a supporting member connected to the base member, wherein the pressing member includes a pressing surface that presses the focus ring toward the base member and a plurality of contact surfaces that face downward and are arranged at a predetermined interval in a circumferential direction thereof, the supporting member includes first contact surfaces and second contact surfaces, the first contact surfaces are arranged at the predetermined interval in the circumferential direction, the second contact surfaces are arranged at the predetermined interval in the circumferential direction such that the second contact surfaces and the first contact surfaces are alternately arranged on a single circle when viewed from above the supporting member, the first contact surfaces are located at a position different from that of the second contact surfaces in a height direction, and the contact surfaces of the pressing member are protruded from portions of the pressing member at a distance larger than distances of the first contact surfaces and the second contact surfaces in the height direction.