Patent ID: 6629423
Filing Date: 2003-10-07
Classification: H01J,H01L

Abstract:
A method for controlling the temperature of an object to be processed, on a supporting table in a processing system, said system comprising a processing vessel including said supporting table having therein a refrigerant circulating passage, and a temperature control circuit for controlling a heat quantity and/or a flow rate of a refrigerant circulating in said refrigerant circulating passage,wherein a target differential value is previously determined in accordance with a process in said processing system, said target differential value being a theoretical difference between inlet and outlet temperatures of the refrigerant in said refrigerant circulating passage, said inlet and outlet temperatures of the refrigerant in said refrigerant circulating passage are detected to determine an actual differential value that is a difference between said inlet and outlet temperatures, and the heat quantity and/or the flow rate of the refrigerant in said temperature control circuit is controlled so that said actual differential value follows said target differential value to control the temperature of said object on said supporting table.