Patent ID: 8081007

Claim:
An inspection apparatus for inspecting electric characteristics of a plurality of devices formed on a target object, the apparatus comprising: a movable mounting table having therein a temperature controller; a vertical drive mechanism for lifting and lowering the mounting table; a control unit for controlling the vertical drive mechanism; and a probe card having a plurality of probes arranged above the mounting table, the target object being heated or cooled to a specified temperature by means of the temperature controller and being inspected while the devices and the probes of the probe card are brought into contact with each other under a predetermined contact load by means of the vertical drive mechanism, wherein the vertical drive mechanism includes an elevation shaft connected to the mounting table and a servo motor for driving the elevation shaft to lift and lower the mounting table, wherein the control unit includes a servo driver which includes a position control part for controlling a position of the servo motor, a torque control part for controlling a torque of the servo motor and a switching part for switching between the position control part and the torque control part.