Patent ID: 7836574
Filing Date: 2010-11-23
Classification: B81B,B81C,H03H,Y10T

Abstract:
1. A method for forming a filter device, the method comprising: a base wafer being one of an insulating wafer and a Silicon-On-Insulator wafer; a resonator wafer being a Silicon-On-Insulator wafer having a single crystal silicon semiconductor material active layer and a semiconductor material handle layer separated by a dielectric layer; in the base wafer, forming one or more resonator anchors adjacent to a capacitive air gap and one or more RF transmission lines; coupling the active layer of the Silicon-On-Insulator resonator wafer directly to the resonator anchors of the base wafer; removing the handle and dielectric layers of the Silicon-On-Insulator resonator wafer; and in the single crystal silicon semiconductor material active layer of the Silicon-On-Insulator resonator wafer, silicon dry etch micromachining a single crystal silicon resonator.