Patent ID: 6992500

Claim:
A prober for testing a plurality of objects to be tested which are arranged on a wafer-like substrate under temperature control, comprising: a prober chamber; a stage base arranged in the prober chamber; an X-Y stage arranged on the stage base, the X-Y stage including an X-Y stage driving mechanism to move the X-Y stage at least in the X-Y direction; a Z stage arranged on the X-Y stage, the Z stage including a Z stage elevating mechanism to vertically move the Z stage; a main chuck arranged on the Z stage, the main chuck including: a rotational driving mechanism to rotate the main chuck in the θ direction, a plurality of heaters, said plurality of heaters respectively having sizes suitable to heat either one object to be tested or a group of objects to be tested, and said plurality of heaters respectively including temperature sensors, and a heat exchanger which cools the objects to be tested which are heated by said plurality of heaters; and a temperature controller which controls at least either the heaters or heat exchanger on the basis of the detection results of the temperature sensors, wherein said plurality of heaters have either cell structures respectively corresponding to one object to be tested, or cell structures respectively corresponding to the group of objects to be tested, the cell structures include individual heat exchangers, and the temperature controller controls at least either the heaters or heat exchanger, thus controlling the temperatures of the cell structures.