Patent ID: 8424594
Filing Date: 2013-04-23
Classification: G01R

Abstract:
1. A testing apparatus comprising: a device under test (DUT), said DUT having a first surface, a second surface, and a plurality of sides perpendicular to said first surface and said second surface, comprising; a frame, said frame having a first rail for translation in a first lateral direction and a second rail for translation in a second lateral direction that is perpendicular and coplanar to said first lateral direction; a heat spreader mounted to said first rail and said second rail, said heat spreader including a transparent diamond sheet having a first surface and a second surface with a single aperture formed therein; said diamond sheet mounted in a cooling ring that includes a base formed from copper plated with gold; a solid immersion lens accommodated in said aperture of said transparent diamond sheet; a clamp for holding said DUT under said heat spreader; wherein said DUT is held under said heat spreader by said clamp such that said heat spreader is pressed against a silicon substrate located above said first surface of said DUT by at least one spring to maintain uniform pressure on said DUT while said second surface of said DUT is secured to an electrical interface with said clamp; and wherein said heat spreader is movable relative to said DUT by translation of said rails in said lateral directions to position said solid immersion lens for analyzing said DUT while said heat spreader remains in contact with said DUT.