Patent ID: 6532824
Filing Date: 2003-03-18
Classification: G01B,G01L,G01P

Abstract:
A capacitive strain sensor comprising:a substrate comprising an elastic body having one of a flat surface and a curved surface; a dielectric film layer formed on the surface of the elastic body with a substantially uniform thickness, said dielectric film layer being made of a material having a dielectric constant which changes in dependence upon strain; and at least one interdigital pair-electrode capacitor formed on the dielectric film layer; wherein said elastic body comprises a rectangular structure, and wherein said interdigital pair-electrode capacitor comprises a pair of common electrodes extending in parallel to two parallel sides of said rectangular elastic body and faced to each other, and a plurality of linear electrodes inclined by about 45Â° with respect to an extending direction of said common electrodes and extending in parallel to one another to be alternately interposed as digits of an interdigital pattern.