Patent ID: 8536891
Filing Date: 2013-09-17
Classification: G01R

Abstract:
1. An inspection method for inspecting electric characteristics of a plurality of devices formed on a target object by using an inspection apparatus which includes 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 vertical drive mechanism including an elevation shaft connected to the mounting table and a servo motor for driving the elevation shaft to lift and lower the mounting table, the inspection method comprising: heating or cooling the target object to a predetermined temperature; controlling a position of the servo motor until the target object and the probes come into contact with each other; and controlling a torque of the servo motor while inspecting the electric characteristics of the devices after the target object and the probes have come into contact with each other, wherein said controlling the torque of the servo motor includes adjusting the torque of the servo motor by lifting or lowering the mounting table when it is determined that the torque of the servo motor is changed after the target object and the probes have come into contact with each other.