Patent ID: 7560668
Filing Date: 2009-07-14
Classification: H01J,H01L

Abstract:
1. A substrate processing device, comprising: a ceramic base including at least one member to be supplied with power; at least one power supply member, which applies a voltage to the member to be supplied with power, provided in the base; a peripheral member disposed close to the power supply member; a heat insulator surrounding a portion of the power supply member, disposed between the power supply member and the peripheral member, and having heat resistance to a temperature at least higher than 250° C.; an insulating pipe surrounding another portion of the power supply member and which is separated from both the heat insulator and the peripheral member; and a shaft supporting the ceramic base and comprising a hollow cylinder made of a material selected from the group consisting of aluminum nitride, silicon nitride and aluminum oxide; wherein the peripheral member is provided on an inner circumferential surface of a lower end of the shaft; wherein a lower end of the power supply member is fitted to the peripheral member through the heat insulating member; and wherein at least a part of the peripheral member is disposed adjacent to the power supply member at a distance of 5 mm or less.