Patent ID: 8119432

Claim:
A method comprising: providing a first substrate having an upper surface; forming one or more electrodes overlying the first substrate; forming a dielectric layer having a top surface and overlying the one or more electrodes; forming a trench in the dielectric layer, the trench extending from the top surface of the dielectric layer to the upper surface of the first substrate; providing a second substrate having a single crystal silicon layer; bonding the second substrate to the first substrate, wherein the single crystal silicon layer makes contact with at least a portion of the dielectric layer; thinning the second substrate to a predetermined thickness; forming one or more vias extending from a top surface of the thinned second substrate to the one or more electrodes; forming a metal layer over the top surface of the thinned second substrate; patterning the metal layer to form a resonator layer; and removing at least a portion of the resonator layer to form a resonator structure.