Patent ID: 7789962

Claim:
A device for controlling a temperature of a mounting table for mounting thereon a target object, the device comprising: a first and a second coolant passageway provided at the mounting table, each having an inlet and an outlet; a coolant circulator having an output port connected to the inlet of the first coolant passageway via a first channel and a return port connected to the outlet of the second coolant passageway via a second channel, for circulating a coolant in the first and the second coolant passageway and outputting the coolant that has returned to the return port through the output port after restoring a temperature of the coolant to a reference temperature; a coolant temperature controller provided in the middle of the first channel, for raising or lowering the temperature of the coolant from the reference temperature to a desired set temperature; a channel switching unit having a first port connected to the outlet of the first coolant passageway via a third channel, a second port connected to a first branchpoint provided at an upstream side of the coolant temperature controller of the first channel via a fourth channel, a third port connected to the inlet of the second coolant passageway via a fifth channel and a fourth port connected to a second branchpoint provided in the second channel via a sixth channel, the channel switching unit for connecting, blocking and changing the channels among the first to the fourth port; and a channel controller for connecting, blocking and changing the channels inside the channel switching unit.