Patent ID: 8551798

Claim:
A method of fabricating a microstructure device, the method comprising: providing a layered wafer, wherein the wafer includes a silicon handle layer, a buried oxide layer on the handle layer, and a silicon device layer on the buried oxide layer; forming a top oxide layer on the device layer; etching the top oxide layer, the device layer, and the buried oxide layer, thereby forming trenches to create an anchor and a microstructure device in the device layer; forming a thermal oxide layer along sides of the microstructure device to enclose the microstructure device in the buried oxide layer, the top oxide layer and the thermal oxide layer; forming a poly layer to fill in the trenches and enclose the anchor; and etching away portions of the buried oxide layer, the top oxide layer and the thermal oxide layer enclosing the microstructure device while the poly layer encloses the anchor.