Patent ID: 7679385

Claim:
A probe card for inspecting electric properties of an object to be inspected located thereunder, 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 attached to both upper and lower surfaces of said substrate to have the substrate sandwiched therebetween, each of said sheets composed of a plurality of elastic conductive portions and an insulating portion interconnecting said conductive portions, said conductive portions being formed to pass through each of said sheets and protrude from both upper and lower surfaces of each of said sheets, said substrate being formed with a plurality of current-carrying paths passing from the upper surface to the lower surface of said substrate, said conductive portions of said sheets on both surfaces of said substrate being electrically connected to corresponding current-carrying paths of said substrate, said sheets on both surfaces of said substrate being bonded to said substrate, said sheet on the upper surface side of said substrate having a frame attached thereto, and said frame surrounding an outer peripheral portion of said sheet on the upper surface side and holding said sheet on the upper surface side, and said sheet on the upper surface side being bonded to said circuit board by said frame; and wherein said frame is fixed to said circuit board at a position outside an outer periphery of said substrate.