Patent ID: 8749113

Claim:
An electrostatic actuator, comprising: an electrode unit provided on a substrate; a conductive film body unit provided opposing the electrode unit, the conductive film body unit having a rectangular shape, the conductive film body unit having a plurality of rectangular holes, and a long-axis direction of the holes being substantially orthogonal to a long-axis direction of the conductive film body unit; a plurality of first urging units provided at a first circumferential edge portion of the conductive film body unit to support the film body unit, the plurality of first urging units provided in the long-axis direction of the conductive film body unit, the plurality of first urging units extending substantially orthogonal to the long-axis direction of the conductive film body unit; and a plurality of second urging units provided at a second circumferential edge portion opposing the first circumferential edge portion to support the film body unit, the plurality of second urging units provided in the long-axis direction of the conductive film body unit, the plurality of second urging units extending substantially orthogonal to the long-axis direction of the conductive film body unit, the electrode unit and the conductive film body unit contacting or separated from each other, the electrode unit being set to a voltage having a prescribed value, the plurality of first urging units having mutually different rigidities, and the plurality of second urging units having mutually different rigidities.