Patent ID: 7083997
Filing Date: 2006-08-01
Classification: B81B,B81C,G02B

Abstract:
1. A method of fabricating a microelectromechanical system, said method comprising: providing a substrate comprising a handle layer of silicon, a device layer of silicon and a sacrificial layer of silicon disposed between the handle layer and the device layer, the handle layer being separated from the sacrificial layer by a first dielectric layer, the sacrificial layer being separated from the device layer by a second dielectric layer; forming an isolation trench that extends through at least the sacrificial layer, the isolation trench defining a release area in the sacrificial layer; forming a micromechanical structure in the device layer by etching the silicon of the device layer; and removing at least a portion of the sacrificial layer of silicon underlying the micromechanical structure to release the micromechanical structure for movement.