Patent ID: 7486095

Claim:
A method of determining resistances of electrical paths in an interconnect structure, the electrical paths connecting ports of the interconnect structure to test points of the interconnect structure, the test points for contacting electronic devices to be tested, wherein the ports are connectable to communications channels of a tester configured to control testing of the electronic devices, the method comprising: connecting the ports to the communications channels; electrically connecting a plurality of the test points to each other; driving a current down a selected one of the channels and into one of the ports connected to the selected one of the channels, the one of the ports connected to one of the plurality of the test points; measuring a voltage drop between the selected one of the channels and another of the channels connected to another of the plurality of the test points; repeating the driving and the measuring for at least one of a different selected one of the channels or a different another of the channels; and approximating a resistance of the electrical path between at least one of the ports and at least one of the plurality of the test points with the driven currents and the measured voltages.