Patent ID: 7307435

Claim:
A probe card comprising: a main substrate; a main reinforcing plate attached to the main substrate; a sub-reinforcing plate attached to the main reinforcing plate, and a coupling force adjusting means for coupling the main reinforcing plate with the sub-reinforcing plate at a plurality of coupling positions that are intersections of a plurality of imaginary concentric circles provided at different distances from a center of the probe card, and a plurality of imaginary straight lines provided radially from the center at a predetermined angle, so as to prevent deformation of the main reinforcing plate and the sub-reinforcing plate due to the difference in the amount of thermal expansion or thermal shrinkage, wherein the coupling force adjusting means comprises: a plurality of threaded holes of the main reinforcing plate provided at the plurality of coupling positions; a plurality of threaded holes of the sub-reinforcing plate provided at the plurality of coupling positions; and a plurality of coupling screws for selectively threading into the respective screw holes and threaded holes, the coupling screws being countersunk screws whose outer circumferential surfaces of head portions are taped.