Patent ID: 7082024
Filing Date: 2006-07-25
Classification: H01G,H01H,Y10T

Abstract:
1. A variable capacitor comprising: a groove portion formed in an insulating substrate, two upper portions of the substrate located on either side of the groove portion forming two lateral edges, a conductive layer covering the inside of the groove portion, a flexible membrane, formed of a conductive material, placed above the groove portion by bearing on said edges, a dielectric layer covering the conductive layer or the membrane to insulate the portions of the conductive layer and of the membrane which are close to each other, and terminals of application of a voltage between the conductive layer and the membrane, wherein the depth of the groove portion continuously increases from one of the edges to the bottom of the groove portion, and wherein the conductive layer covers the inside of the groove portion at least to reach one of the two edges, that it may cover.