Patent ID: 7277214

Claim:
A method of fabricating a tiltable-body apparatus which includes a frame member formed of a ( 100 ) single crystal silicon substrate, a tiltable body formed of the ( 100 ) single crystal silicon substrate, and a torsion spring having a twisting longitudinal axis and formed of the ( 100 ) single crystal silicon substrate, the torsion spring being disposed along the twisting longitudinal axis, the torsion spring supporting the tiltable body flexibly and rotatably about the twisting longitudinal axis relative to the frame member, and the torsion spring including a plurality of planar portions defined by ( 100 ) and ( 111 ) faces of the single crystal silicon substrate, compliant directions of which intersect each other when viewed along a direction of the twisting longitudinal axis, said method comprising the steps of: depositing mask layers on both upper and lower surfaces of the ( 100 ) single crystal silicon substrate, respectively; patterning the mask layers in accordance with configurations of the tiltable body and the torsion spring; and anisotropically etching the ( 100 ) single crystal silicon substrate using the patterned mask layers.