Patent ID: 7782071

Claim:
A wafer test station comprising: a test head having a probe card mounted therein, the probe card having a plurality of probes for forming an electrical connection with at least one device under test when the probes are placed in physical contact with the at least one device under test; a prober module having a stage for supporting the at least one device under test and for moving the at least one device under test into and out of contact with the probes of the probe card; a probe array analyzer module having an optical inspection system adapted to image each of the plurality of probes of the probe card, the optical inspection system comprising: a transparent fiducial plate, the fiducial plate have a plurality of fiducials formed therein in known positions; a viewing system positioned to capture an image of at least one of the plurality of probes through the fiducial plate; a processor for identifying a position of substantially all of the probes of the probe card relative to the fiducials and to one another; wherein the test head, the prober module and the probe array analyzer module include mechanisms associated therewith that permit the test head to be is configured to be selectively coupled to either of the prober module and the probe array analyzer module such that the probe card is loaded in substantially the same manner when the test head is coupled to the prober module or the probe array analyzer module.