Patent ID: 8449679
Filing Date: 2013-05-28
Classification: H01J,H01L

Abstract:
1. A temperature-controlled hot edge ring assembly adapted to surround a semiconductor substrate supported in a plasma reaction chamber, the assembly comprising: a substrate support with an annular support surface surrounding a substrate support surface, a radio-frequency (RF) coupling ring overlying the annular support surface; a lower gasket between the annular support surface and the RF coupling ring, the lower gasket being thermally and electrically conductive; a hot edge ring overlying the RF coupling ring, wherein the substrate support is adapted to support a substrate such that an outer edge of the substrate overhangs the hot edge ring; and an upper thermally conductive medium between the hot edge ring and the RF coupling ring; wherein the thermally conductive medium comprises: an inner O-ring and an outer O-ring, the inner O-ring and the outer O-ring being concentrically arranged, wherein the inner O-ring, outer O-ring, the hot edge ring and the RF coupling ring define a volume, the volume adapted to contain pressurized heat transfer gas, wherein the heat transfer gas includes helium, neon, argon or nitrogen.