Patent ID: 7208960
Filing Date: 2007-04-24
Classification: G01D,G01L,H03K

Abstract:
1. A capacitive sensor comprising: a first flexible, resilient dielectric layer having a first and second side and a thickness of between 8 and 250 micrometers; an electrically conductive detector and trace layer on the first side of the first dielectric layer comprising a detector and trace; a first electrically conductive reference layer on a second side of the first dielectric layer; an electric field across the first flexible, resilient dielectric layer; and a capacitance meter electrically connected to the detector and trace layer and to the first conductive reference layer; wherein the first conductive reference layer has a first voltage and the detector and trace layer has a second voltage, and wherein the first and second voltage have a difference of at least 0.1 volts; and wherein the first dielectric layer comprises a film free of voids.