Patent ID: 7312604

Claim:
An apparatus for positioning a test head relative to a prober, comprising a frame, first and second elongate lead screws, each of the lead screws having an extremity pivotably coupled to the frame, the first lead screw pivotable about a first pivot axis and the second lead screw pivotable about a second pivot axis extending parallel to the first pivot axis, the first and second lead screws rotatable about respective first and second axes of rotation, the first axis of rotation extending perpendicular to the first pivot axis and the second axis of rotation extending perpendicular to the second pivot axis, a link having a first end portion rotatably coupled to the first lead screw and a second end portion rotatably coupled to the second lead screw, at least one actuator coupled to the first and second lead screws for rotating the first lead screw in opposite first and second directions about the first axis of rotation and for rotating the second lead screw in opposite first and second directions about the second axis of rotation and an arm coupled to the link and adapted to carry the test head wherein rotation of the first and second lead screws in the first direction causes the link to translate relative to the first and second lead screws so as to translate the test head relative to the frame and rotation of the first lead screw in the first direction and rotation of the second lead screw in the second direction causes the link to rotate relative to the first and second lead screws so as to pivot the test head relative to the frame.