Patent ID: 7083737
Filing Date: 2006-08-01
Classification: B81B,B81C,Y10T

Abstract:
1. A method for manufacturing a micro-actuator comprising the steps of: forming a top structure by processing a first plate, the top structure comprising a substantially rectangular stage, a plurality of driving comb-type electrodes formed on the bottom of the stage, a first frame layer separated from and surrounding the stage along the periphery the stage and having a first height, and at least one torsion bar for suspending the stage from the first frame layer and providing a restoring force upon rotation of the stage along an axial direction of the torsion bar; forming a bottom structure by processing a second plate and a base plate, the bottom structure comprising a base plate, a plurality of fixed comb-type electrodes formed on the base plate, and a second frame layer formed on the base plate and surrounding the fixed comb-type electrodes and having a second height; and joining the top and bottom structures to form one body by forming a eutectic bonding layer between the first frame layer and the second frame layer, said first frame layer being aligned with the second frame layer so that the driving comb-type electrodes interdigitate the fixed comb-type electrodes. wherein an electrostatic force induced between the driving comb-type electrodes and the fixed comb-type electrodes causes the stage to rotate alone the axial direction during operation of the micro-actuator.