Patent ID: 7205174
Filing Date: 2007-04-17
Classification: B81B,G02B

Abstract:
1. A method of fabricating the comb-drive actuator comprising the steps of: etching back side of the first semiconductor wafer to define features for alignment of subsequent steps; etching front side of the first semiconductor wafer to specific depth to form a cavity and stationary comb electrodes by aligning to features on the back side of wafer; oxidizing at least one surface of a second semiconductor wafer; fusion bonding the first wafer with the second wafer with oxidized surface of the second wafer facing the etched cavity and comb electrodes of the first wafers; etching the second wafer to form the movable element and stationary element by aligning to features on the back side of the first wafer such that the comb electrodes of the moveable element are interdigitated with the comb electrodes of the stationary element which over lap the stationary comb electrodes of the first wafer but are insulated by the oxide layer.