Patent ID: 7791359

Claim:
A probe card for transmitting high frequency test signals to probe electronic devices, comprising: a circuit board defining a top surface for electrically connecting to a test machine, and a bottom surface opposite to the top surface, the circuit board having arranged thereon a plurality of signal circuits and grounding circuits in such a manner that at least one said grounding circuit is spacedly disposed adjacent to one said signal circuit and the grounding circuits are electrically connected to grounding potential; a probe holder mounted on the bottom surface of the circuit board; and a plurality of signal probes and grounding probes, in which the signal probes each comprises a metal pin and at least one lead wire arranged on and electrically insulated from the metal pin and electrically connected to the grounding probes, and the metal pins of the signal probes and the grounding probes each have a probing tip for probing electronic devices, a posterior portion, and a positioning portion located between the posterior portion and the probing tip and mounted to the probe holder; the posterior portions of the metal pins of the signal probes being electrically connected to the signal circuits; the posterior portions of the grounding probes being electrically connected to the grounding circuits.