Patent ID: 6757140
Filing Date: 2004-06-29
Classification: G11B

Abstract:
A data storage system comprising:a head; a microelectromechanical actuator that is secured to the head to effect fine positioning of the head, and which comprises a rotor that is electrostatically coupled to an inner stator and an outer stator; the rotor comprises a set of movable inner radial spokes and a set of movable outer radial spokes that are disposed on opposite sides of the rotor; the rotor further comprises a set of inner movable electrodes and a set of outer movable electrodes that extend from, and that are arranged substantially perpendicularly relative to the inner and outer movable radial spokes, respectively; the inner stator comprises a plurality of outwardly extending inner radial spokes and a plurality of inner electrodes that are arranged substantially perpendicularly relative to the inner radial spokes and that are interleaved with the inner movable electrodes; the outer stator comprises a plurality of inwardly extending outer radial spokes and a plurality of outer electrodes that are arranged substantially perpendicularly relative to the outer radial spokes and that are interleaved with the outer movable electrodes; and wherein the inner radial spokes of the inner stator ore mostly equidistally distributed.