Patent ID: 7408367
Filing Date: 2008-08-05
Classification: G01R

Abstract:
1. A micro Kelvin probe assembly for determining the resistance or impedance of a device under test (DUT) that has two spaced contacts, using an ammeter to flow current through the DUT and a voltmeter to measure the voltage drop across the DUT, the assembly comprising: a printed circuit board (PCB) carrying two pairs of contacts, where each pair of contacts are arranged as concentric circles of different radii; anisotropic conductive elastomer (ACE) material as an electrical interposer in direct physical and electrical contact with each of the PCB two pairs of contacts; wherein the DUT is placed on the ACE such that each DUT contact is directly opposite one pair of PCB contacts; and wherein the ammeter is connected to one contact of each pair of PCB contacts and flows current through the DUT, and the voltmeter is connected to the other contact of each pair of PCB contacts, so that voltmeter can be used to measure the voltage drop across the DUT without an effect caused by the interposer.