Patent ID: 7014499
Filing Date: 2006-03-21
Classification: G01R

Abstract:
1. A probe card for testing semiconductor devices, comprising a main board member having connection terminals formed on a top side thereof to be in contact with pogo pins of a test head, and connection terminals concentrated on the center of a bottom side thereof to be in contact with the connection terminals of the top side, thereby forming a connection circuit; an upper reinforcing plate fixedly engaged with the center of the top side of the main board member so as to prevent an upward distortion of the main board member; a lower reinforcing plate formed in a track-shaped structure having a predetermined thickness and a predetermined width on the center of the main board member, and fixedly engaged with the main board member together with the upper reinforcing plate so as to prevent a downward distortion of the main board member; an interface member having connection terminals formed on the top and bottom sides thereof on a same vertical line to be in contact with each other, each connection terminal being combined with the one end of a connection pin at a predetermined angle in the mutually corresponding directions to have elasticity, the other end of the connection pin on the top side being in contact with the connection circuit of the main board member, the interface member being inserted in an inner space of the lower reinforcing plate so as to prevent its horizontal movement; a sub board member being formed from a ceramic material and having a circuit pattern formed by a fine-pattern forming process of semiconductor, the circuit pattern having connection terminals formed on a top side thereof to be in contact with the connection pins slantly extending downward from the interface member, and connection terminals formed on a bottom side thereof to form an integrated circuit pattern smaller in size than the circuit pattern of the top side; a needle guide member having a flat plate provided with a plurality of needle insert holes formed on the same vertical line of the connection terminals on the bottom side of the sub board, and being attached to the bottom side of the sub board member; a plurality of needle members having a patterned fine thin plate inserted into the respective needle insert holes of the needle guide member; a side cover member being inserted into the lower reinforcing plate and having a stepped inner neck with the sub board member and the needle guide member combined together and fixedly inserted therein; and a clamping member having the one end thereof being bolted to the lower reinforcing plate and the other end thereof being formed from a thin plate of an elastic metal material so as to press upwardly a stepped outer neck of the side cover member.