Patent ID: 8453312
Filing Date: 2013-06-04
Classification: B81B,B81C,H03H,Y10T

Abstract:
1. A method forming a vibrating micromechanical structure, the method comprising: micromachining one or more resonator structure anchors, a capacitive air gap, one or more isolation trenches, and one or more alignment marks in a single crystal silicon semiconductor material active layer of a first Silicon-On-Insulator wafer having a dielectric layer between a semiconductor material handle layer and the semiconductor material active layer; fusion bonding a single crystal silicon semiconductor material active layer of a second Silicon-On-Insulator wafer directly to the active layer of the first Silicon-On-Insulator wafer, the second Silicon-On-Insulator wafer having a dielectric oxide layer between a second semiconductor material handle layer and the semiconductor material active layer; removing the second semiconductor material handle layer and dielectric oxide layers of the second Silicon-On-Insulator wafer; etching one or more windows in the active layer of the second Silicon-On-Insulator wafer; and silicon dry etch micromachining a single crystal silicon resonator structure in the single crystal silicon semiconductor material active layer of the second Silicon-On-Insulator wafer.