Patent ID: 7675671

Claim:
A micro electro mechanical systems (MEMS) device including a substrate laminated a first silicon layer, a second silicon layer and an insulation layer between the first silicon layer and the second silicon layer, the MEMS device comprising: a rotating unit having the first silicon layer; a first hinge supporting to rotate the rotating unit; a first frame having the first silicon layer, the second silicon layer and the insulation layer, the first frame arranged around an outer circumference of the rotating unit, the first frame supporting the rotating unit with the first hinge; a first side surface formed on the first silicon layer of the rotating unit opposite side of the first silicon layer of the first frame; a second side surface formed on the second silicon layer of the first frame opposite side of the rotating unit; a first actuator having in a pair of a first electrode and a second electrode, the first actuator generating electrostatic force for rotating the rotating unit by driving voltage, the first electrode arranged on the first side surface of the rotating unit, the second electrode arranged on the second side surface of the first frame; a first junction area formed on an edge of the second silicon layer of the first frame by the side of the insulation layer, the first junction area chamfered; and a second junction area formed on an edge of the first silicon layer of the first frame by the side of the insulation layer, the second junction area chamfered.