Patent ID: 7090781

Claim:
A method of making a microactuator with an electrostatic impact driving mechanism, by monolithically forming from a Si single crystal substrate, an outer frame part, and an elastic support beam, a movable mass, a driving electrode and a stopper member and forming a pedestal part and a lid part from a material having a preselected friction coefficient, characterized by comprising the sequential steps of: a) forming said driving electrode member on a front surface of said Si single crystal substrate; b) etching said Si substrate from its back side in order to make said elastic support beam and movable mass members floating in the air; c) attaching a first member having a preselected friction coefficient to rear surfaces of said Si substrate; d) etching said Si substrate from its front side in order to form said outer frame part, said elastic support beam and movable mass members, the formed portion of said driving electrode member and said stopper member monolithically; e) etching said elastic support beam and movable mass members formed in step (d) from their front side in order to make said elastic support beam and movable mass members floating in the air; and f) attaching a second member having said preselected friction coefficient to front surfaces of said Si substrate.