Patent ID: 8030957

Claim:
An apparatus for testing an integrated circuit of a device, comprising: an apparatus frame; a holder for the device, secured to the apparatus frame; a subassembly including: (i) a contactor support structure held by the apparatus frame; (ii) a compensating piece with a three-dimensional profiled surface that improves planarity of a three-dimensional profile of a surface of the subassembly other than the profiled surface of the compensating piece; and (iii) a plurality of terminals held by the contactor support structure, the holder and contactor support structure being movable relative to one another so that each one of the terminals releasably makes contact with a respective contact of the device; a power source; a power electrical path connecting the power source to a power terminal of the terminals held by the support structure; a signal source; and a plurality of signal electrical paths, each connecting the signal source to a respective signal terminal of the terminals held by the support structure.