US Patent 6853209 Contactor assembly for testing electrical circuits

The invention provides a contactor assembly. The contactor assembly comprises an electrical contactor including a contactor substrate, a plurality of electrical terminals on the contactor substrate; an interposer including an electrically conductive interposer substrate having first and second sides, a plurality of first and second resilient interconnection elements extending respectively from the first and second sides of the interposer substrate, wherein the interposer is positioned in a predetermined position relative to the electrical contactor in which predetermined position each first resilient interconnection element makes electrical contact with an electrical terminal of the electrical contactor, the interposer substrate having been moved relatively towards the contactor substrate to resiliently deform the first resilient interconnection elements; and a retaining component having a first portion secured to the electrical contactor and a second portion in contact with the interposer to retain the interposer in the predetermined position relative to the electrical contactor.