Patent ID: 7193492

Claim:
A device, comprising: a stationary part having an electrode; a movable part movably coupled to the stationary part by one or more springs, each spring connected between said movable and stationary parts, the movable part having a first conducting structure, wherein: the electrode and the first conducting structure form an actuator; the movable part is adapted to rotate with respect to the stationary part about a rotation axis defined by said one or more springs in response to a voltage differential applied to the actuator; the movable part has a short portion and a long portion with respect to said rotation axis, said short and long portions forming an unbalanced plate; and the first conducting structure is located at said short portion such that the mass of the first conducting structure at least partially compensates for the plate's imbalance; and a substantially continuous conducting barrier around the perimeter of the electrode, said barrier adapted to provide electrical shielding for the electrode, wherein the first conducting structure is a part of said barrier.