Patent ID: 6131255
Filing Date: 2000-10-17
Classification: G01R,H01L

Abstract:
A vessel for interfacing a plurality of semiconductor integrated circuit dice, each of said dice having a plurality of contact pads, with other electronic systems, said vessel comprising:at least one printed circuit board (PCB);means for non-permanently maintaining a precise position of said PCB with respect to said dice; andmeans for non-permanently electrically connecting said PCB to said contact pads, said means for non-permanently electrically connecting comprises:a plurality of electrically conductive pillars extending from said PCB;said pillars positioned to precisely contact said contact pads when said dice and PCB are brought together in alignment;wherein said means for non-permanently maintaining said precise position comprise:an upper plate;means for attaching said PCB to said upper plate;said upper plate sized and positioned to impart a substantially uniform vertical force across said PCB and thereby said pillars;a lower plate;means for non-permanently attaching said dice to said lower plate;said lower plate sized and positioned to impart a substantially uniform vertical force across said dice; andmeans for rigidly and non-permanently maintaining a position of the upper plate with respect to the lower plate;wherein said means for non-permanently attaching said dice to said lower plate comprise:said lower plate having a plurality of recesses sized and dimensioned to accommodate dice of varying thicknesses such that tops of said dice lie substantially within a plane.