Abstract: An inertial sensor including at least one measurement beam and one active body formed of a proof body and of deformable plates, said active body being maintained in suspension inside of a tight enclosure via its plates, the measurement beam connecting a portion of the proof body to an internal wall of said enclosure, said measurement beam having a lower thickness than the proof body.

Abstract: A micro-electromechanical system (MEMS) device for measuring accelerations, angular rates, or for actuation comprises at least two substrates and at least one movable structure arranged in a cavity between the substrates. An electrically conducting frame surrounding the movable structure is arranged at an interface of the two substrates. The frame is electrically separated from the movable structure and connected by at least first and second electrically conducting connections to the first and second substrates, respectively. The frame may have a width of not more than 150 preferably not more than 50 ?m. The first connection is at an interface between the frame and the first substrate. The second connection is a layer applied at an outer periphery of the frame and a peripheral face of the second substrate. The structure keeps electrical fields and electromagnetic disturbances away from the sensor and may also be used for shielding micro-electronic circuits.