Patent ID: 7710134

Claim:
A probe card assembly, comprising a main body, a probe base provided at a center of the main body, and a plurality of test probes connecting the main body and the probe base, wherein each of the test probes has a tip extending out from the probe base for contacting a wafer to be tested, and the test probes comprise at least one power probe, at least one grounding probe and a plurality of signal probes, in which each of the test probes has a middle section between the main body and the probe base, the probe card assembly being characterized in that: the middle sections of at least one said grounding probe and at least one said signal probe have outer surfaces thereof coated with a conductive adhesive that extends to a grounding end of the main body of the probe card assembly, wherein the grounding probe is a bare probe without an insulation layer and each of the signal probes contains therein a core that is wrapped by an insulation layer.