Patent ID: 8692564
Filing Date: 2014-04-08
Classification: G01B

Abstract:
1. A system for use in determining a thickness of a layer of interest in a multi-layer structure, said system comprising: a sample engaging member comprising a first electrode having a first sample contact surface configured to be positioned in contact with a first surface of the multi-layer structure; a second electrode having a second sample contact surface configured to be positioned in contact with a second surface of the multi-layer structure, wherein the second surface is opposite the first surface; a pressure control device configured to press said first electrode against the multi-layer structure substantially at a predetermined sampling pressure, wherein the sampling pressure is a pressure at which an electrical impedance of the sample tracks a reference impedance associated with the sample; and a measurement device electrically coupled to said first electrode and said second electrode, said measurement device configured to measure an electrical impedance between said first electrode and said second electrode.