Patent ID: 7324251

Claim:
A micro-actuation element comprising a movable unit, a support frame and a coupler for connecting the movable unit and the frame, the movable unit, the frame and the coupler being integrally formed in a material substrate with a multi-layer structure comprising a plurality of electroconductive layers and insulation layers arranged between the electroconductive layers, the electroconductive layers including a core conduction layer, the movable unit comprising a first structure originating in the core conduction layer, the frame comprising a second structure originating in the core conduction layer, the coupler comprising a plurality of electrically separated torsion bars originating in the core conduction layer and continuously connected to the first structure and the second structure, including two torsion bars spaced from each other in a width direction, the two torsion bars having spacing that becomes greater as the bars are closer to the movable unit.