Patent ID: 8869615

Claim:
A vibrating element made in a piezoelectric material machinable through a chemical process, having first and second modes of vibration and having a monolithic structure with a material of uniform thickness and being planar parallelly to a crystallographic plane XY of the material, which includes an electric crystallographic axis X and a mechanical crystallographic axis Y, and including a single substantially parallelepiped beam supporting electrodes configured to take part in one of the two modes of vibration; said beam comprising a longitudinal axis oriented along the electric crystallographic axis X; a fixed part fastened to one of the ends of the beam and a mass part fastened to the other end of the beam, the mass part being movable with an alternating displacement parallel to the plane XY of the monolithic structure following the second mode of vibration, and the mass part has a center of gravity located on a symmetry axis; and wherein the monolithic structure has the symmetry axis parallel to the electric crystallographic axis X, is movable with an alternating rotation about the symmetry axis following the first mode of vibration, and all the electrodes of the monolithic structure are located, at least in part, on the single substantially parallelepiped beam and shaped as two substantially identical strips extending parallel to the longitudinal axis of the beam.