Patent ID: 7368928

Claim:
A vertical-type probe card comprising: a circuit board having a top surface, a bottom surface opposite to the top surface, a plurality of signal circuits and a plurality of grounding circuits; and a probe assembly located below the bottom surface of said circuit board, said probe assembly comprising: an upper guide plate mounted on said circuit board; a lower guide plate defining with the upper guide plate a receiving chamber therebetween; a conducting layer made of conducting material and disposed on the lower guide plate; a plurality of signal probes made of conducting material and respectively electrically connected to said signal circuits; at least one grounding probe made of conducting material and electrically connected to said grounding circuits and said conducting layer, and at least one compensation probe made of conducting material and electrically connected to said conducting layer and arranged in parallel and adjacent to at least one of said signal probes; wherein said signal probe, said at least one compensation probe and said at least one grounding probe are inserted through said upper guide plate and said lower guide plate, and said signal probes and said at least one grounding probe are flexible in said receiving chamber.