Patent ID: 8004290
Filing Date: 2011-08-23
Classification: G01R,H01L

Abstract:
1. A method for determining dielectric thickness, dielectric leakage or other electrical information in a multilayer film stack on a semiconducting or conducting substrate, the multilayer film stack comprising one or more test pads, each of which comprises a first dielectric layer between the substrate and an intermediate layer of semiconducting or conducting material, and a second dielectric layer disposed such that the intermediate layer is between the first and second dielectric layers, the method comprising: a) depositing electrical charge at one or more localized regions on an exposed surface of the second dielectric layer of each test pad; b) performing one or more measurements of an electrical quantity at the one or more localized regions; c) determining a relationship between the measured electrical quantity and an area of the test pads; and d) extracting a property of the second dielectric layer from the relationship.