Patent ID: 8525538
Filing Date: 2013-09-03
Classification: G01R

Abstract:
1. A test apparatus for testing an electrical characteristic of a semiconductor device comprising: a substrate support unit on which a substrate with the semiconductor device formed thereon is placed; a test head including a base to which a probe card is connected, the test head being provided above the substrate support unit; a horizontal maintaining unit holding the probe card in a horizontal state by applying a load on the probe card, the horizontal maintaining unit being installed inside the base of the test head; and a first reinforcement member disposed on a portion of the top surface of the probe card, and a second reinforcement member which is connected to the first reinforcement member and disposed above a central region of the probe card and disposed on a portion of a top surface of the first reinforcement member so that a separation space confined in between the second reinforcement member, the first reinforcement member, and the probe card is formed; and a controller which determines the location of the contact mark and compensates for a bending of the probe card by controlling movement of a certain part of the horizontal maintaining unit.