Patent ID: 7355425

Claim:
A probe card clamp mechanism, comprising: an insertion ring including a cylindrical portion, wherein a card holder of a probe card is attached to a lower end thereof, and a flange portion radially extending outwardly from an upper end portion of the cylindrical portion; and a lock ring, wherein an upper end portion thereof is inserted into an annular groove formed at a bottom surface of the flange portion of the insertion ring and a groove is formed around a circumference of an inner peripheral surface of the lock ring; wherein, at the cylindrical portion of the insertion ring, first rollers inserted into the groove of the lock ring are arranged at three or more locations disposed at predetermined intervals along a circumferential direction thereof; wherein, at the flange portion of the insertion ring, second rollers in contact with the inner peripheral surface of the lock ring are arranged at three or more locations disposed at predetermined intervals along a circumferential direction thereof; and wherein, at the lock ring, cutoff portions, through which the first rollers pass, are arranged corresponding to the first rollers.