Patent ID: 8696862
Filing Date: 2014-04-15
Classification: H01L

Abstract:
1. A substrate mounting table, which is disposed in a processing chamber for performing a plasma process on a substrate mounted on the substrate mounting table and includes at least one power feed part formed of an insulating material surrounding a power feed line and a cooling medium path, the substrate mounting table comprising: an outer protrusion portion provided at an outer periphery of the substrate mounting table to provide a space between the mounted substrate and a substrate mounting surface of the substrate mounting table; an inner protrusion portion provided to surround the insulating material to divide the space into regions, wherein each of the regions is an empty gap; inlet ports through which cooling gases are respectively introduced into the regions; and a controller that controls pressures or flow rates of the cooling gases, wherein the inner protrusion portion is formed concentrically with the power feed part and a center of the power feed part is arranged on a central axis of the inner protrusion portion, and wherein the regions have a smaller area as they get closer to the center of the power feed part.