Patent ID: 8130004
Filing Date: 2012-03-06
Classification: G01R

Abstract:
1. A probe apparatus comprising: a movable mounting table for supporting an object to be tested; a probe card disposed above the mounting table and having a plurality of probes to come into contact with electrodes of the object; a support body for supporting the probe card; and a control unit for controlling the mounting table, wherein electrical characteristics of the object are tested based on a signal from a tester by bringing the object and the probes into electrical contact with each other by overdriving the mounting table in a state where a test head is electrically connected with the probe card by a predetermined load, and wherein one or more distance measuring devices for measuring a current overdriving amount of the mounting table are provided at one or more locations of the test head or the probe card and the control unit compares the current overdriving amount with a preset overdriving amount and corrects the current overdriving amount to become same as the preset overdriving amount based on the comparison result, and wherein the distance measuring devices are provided at the test head, and each includes a first measuring unit for measuring a distance to a top surface of the object on the mounting table and a second measuring unit for measuring a distance to a top surface of the probe card.