Patent ID: 7625772
Filing Date: 2009-12-01
Classification: B81B,B81C,H03H

Abstract:
1. Method for making an electromechanical component on a plane substrate and comprising at least one structure vibrating in the plane of the substrate and actuation electrodes, the method comprising at least the following steps in sequence: formation of the substrate comprising at least one silicon area provided with an upper surface at least partly covered by one insulating area, formation of a sacrificial silicon and germanium alloy layer by selective epitaxy starting from the uncovered part of the upper surface of the silicon area, formation of a silicon layer with a predetermined thickness by epitaxy, comprising at least one monocrystalline area arranged on said sacrificial layer and at least one polycrystalline area arranged on said insulating area, simultaneous formation of the vibrating structure and actuation electrodes, by etching a predetermined pattern in the monocrystalline area designed to form spaces between the electrodes and the vibrating structure, elimination of said sacrificial layer made of silicon and germanium alloy, by selective etching.