Patent ID: 7282930

Claim:
A device for testing thin elements, such as wafers or multiple individual substrates, while at the same time offering a facility for inspecting a back side of the thin elements, with a thermally stable, rigid basic construction, comprising: a stable base plate located on the basic construction and having a central inspection opening, an inspecting device for inspecting a back side of the thin element through the central opening, a frame positioned on the plate such that horizontal movement of the frame on and relative to the plate is allowed, a planar drive mechanism for controlling the horizontal movement of the frame, a highly-rigid substrate support held in the frame, first means for mounting the thin element on the substrate support, wherein mounting of the thin element on the substrate support is effected by a vacuum, or using mechanical elements, gel pack pads, or adhesive, and second means to selectively fix the frame and the substrate support on and relative to the base frame, and third means to selectively facilitate movement of the frame and substrate support on and relative to the base plate.