Patent ID: 6951587
Filing Date: 2005-10-04
Classification: C23C,H01L

Abstract:
1. A ceramic heater system comprising: a heater base integrally formed of a ceramic material, the heater base comprising: a mounting surface formed as an upper surface of the heater base and configured to receive an object thereon, a heater disposed in said heater base and configured to heat the object, and a gas passage provided in said heater base below said heater, said gas passage formed in a lower surface of the heater base and comprising a gas inlet and gas outlets configured to feed a gas into and out from the gas passage, the gas passage comprising a plurality of first passages disposed concentrically in the heater base and a plurality of second passages connecting the plurality of first passages without being aligned in a direction towards a center of concentricity of the plurality of first passages, wherein said heater base is configured to be cooled by feeding the gas having a temperature lower than a temperature of said heater base to the gas passage.