Patent ID: 7595651

Claim:
A cantilever-type probe card comprising: a circuit board arranged thereon with a plurality of signal lines and a grounding block, said grounding block being a metal block electrically connected to a zero potential, said grounding block having a center through hole and a plurality of grooves radially arranged around said center through hole; and a plurality of signal probes and at least one grounding probe made of a conducting metal material, said signal probes being respectively electrically connected to said signal lines, said at least one grounding probe being electrically connected to said grounding block, said at least one grounding probe having a connection portion, a probing tip, and a front arm defined between said connection portion and said probing tip, each of said signal probes having at least one connection portion, at least one probing tip, and at least one front arm defined between said connection portion and said probing tip, the connection portions of said signal probes and said at least one grounding probe being fastened to said circuit board, the front arms of said signal probes and said at least one grounding probe being suspended in the grooves of said grounding block and spaced from said grounding block at a predetermined pitch to support the respective probing tips protruding outside said grounding block; wherein said grooves have a specific depth to provide a sufficient vertical displacement for each of the front arms of said signal probes and said at least one grounding probe to avoid accidental contact between the front arms and the grounding block, wherein the vertical displacement of the front arms corresponds to a longitudinal buffer for the probing tips to buffer the anti-force acted upon the probes.