Patent ID: 8821795
Filing Date: 2014-09-02
Classification: H01L,Y10T

Abstract:
1. A method for screening material, comprising: contacting a set of probes extending from a moveable probe card with a discrete region of a top surface of a substrate, wherein the moveable probe card is coupled to a voltage source to provide access of the voltage source to the set of probes; heating a bottom surface of the substrate through a support over which the substrate is disposed; applying a voltage from the voltage source to the discrete region through the set of probes during the heating, wherein the heating is independent of the applying a voltage; measuring through the moveable probe card, a current value associated with the applied voltage; measuring a temperature of the discrete region during the current measuring; calculating a resistance for the applied voltage and the measured associated current value; changing the applied voltage and the temperature; repeating the current measuring, the temperature measuring and the calculating for the changed applied voltage and the changed temperature; repeating each method operation for a next discrete region, the next discrete region having a varied material composition relative to a material composition of the discrete region.