Patent ID: 7800280
Filing Date: 2010-09-21
Classification: B81B,G02B

Abstract:
1. A microelectromechanical systems (MEMS) device comprising: a frame; an actuator formed on a same layer as the frame and connected to the frame to be capable of performing a relative motion with respect to the frame; and at least one stopper which restricts a displacement of the actuator in a direction along a height of the actuator, wherein the at least one stopper comprises an ascending restriction stopper which restricts an upward displacement of the actuator and a descending restriction stopper which restricts a downward displacement of the actuator, wherein the ascending restriction stopper is fixed to the frame, and includes an end portion that overlaps the actuator by being separated by a predetermined distance from the actuator when there is no displacement of the actuator, and the actuator has a peripheral portion, the peripheral portion of the actuator being caught by the end portion of the ascending restriction stopper in a case of an external shock, and wherein the descending restriction stopper is fixed to the actuator, and includes an end portion that overlaps the frame by being separated by a predetermined distance from the frame when there is no displacement of the actuator, and the end portion of the descending restriction stopper descending with the actuator is caught by the frame in a case of an external shock.