Patent ID: 7332367

Claim:
A method of fabricating a MEMS scanning micro-mirror device actuated by a vertical comb drive actuator having a rotor component and a stator component, the method comprising the steps of: a. providing a wafer having a front side and a back side and including in order from the front side: a first device layer, a first sacrificial layer, a second device layer, a second sacrificial layer and a third device layer; b. performing a backside etch of the second and third device layers in sections that will border mirror and rotor component regions and of the third device layer in sections that will border stator component regions; c. performing a front side etch to obtain the mirror and the actuator rotor and stator components; and d. releasing the mirror and rotor components by etching the sacrificial layers bordering the mirror and actuator components; whereby in the releasing step, rotor components formed in the second device layer drop out from the structure, leaving rotor components in the first device layer and stator components in the second device layer.