Patent ID: 7267551
Filing Date: 2007-09-11
Classification: G01R,H01R

Abstract:
1. A probe card for inspecting electric properties of an object to be inspected, said card comprising: a circuit board; and an inspection contact structure provided between said circuit board and the object to be inspected, for passing current between the object to be inspected and said circuit board, said inspection contact structure comprising: a substrate in a flat plate shape; and sheets respectively attached to both surfaces of the substrate, each of said sheets including a plurality of elastic conductive portions and insulating portions each interconnecting said conductive portions, said conductive portions being formed to pass through said sheet and protrude from both surfaces of said sheets, the substrate being formed with a plurality of current-carrying paths linearly passing through the substrate in a thickness direction in a manner to correspond to said conductive portions, said conductive portions of said sheets on both surfaces of the substrate being in contact with end portions of the respective corresponding current-carrying paths in a manner to have the current-carrying paths sandwiched therebetween, said sheets on both surfaces of the substrate being fixed to the substrate, and the substrate being fixed to the circuit board; wherein said sheets are fixed to a frame formed along an outer peripheral portion of said sheets and fixed to the substrate via said frame; and wherein said frame is bond to the substrate with a silicone adhesive.