Patent ID: 7129617

Claim:
A rotary-type comb-drive actuator, comprising: a substrate; a movable electrode arranged on a plane of the substrate to be movable in parallel to the substrate plane, and formed to have a predetermined length so as to have a comb-shaped electrode comprised of a plurality of fingers; a drive electrode formed to have a length corresponding to that of the movable electrode so as to apply an electrostatic force to the movable electrode, and formed to have a comb-shaped electrode that is comprised of a plurality of fingers and arranged to be interdigitated with the comb-shaped electrode of the movable electrode, the drive electrode being fixed on the substrate; one or more vertical springs arranged in parallel to the substrate, and connected to be perpendicular to the movable electrode on both sides of a first end of the movable electrode; one or more vertical spring anchors connected to the vertical springs to support the vertical springs, and fixed on the substrate; a horizontal spring having a main part connected in parallel to a longitudinal direction of the movable electrode, the horizontal spring being connected to a side of the movable electrode; and a horizontal spring anchor connected to the horizontal spring to support the horizontal spring, and fixed on the substrate.