Patent ID: 9712136
Date: 2017-07-18
CPC Classifications: G01J,H01L,H03H

Claim:
1. A resonator comprising: a piezoelectric layer having a length direction (L), a width direction (W), and a thickness direction (T); a first conductive layer including at least one first electrode disposed over a top surface of the piezoelectric layer, wherein the top surface extends along the length direction and the width direction; a second conductive layer including at least one second electrode disposed over a bottom surface of the piezoelectric layer, wherein the bottom surface extends along the length direction and the width direction; wherein a two-dimensional mode of mechanical vibration is excited in a cross sectional plane of the piezoelectric layer in response to at least one signal provided to the at least one first electrode and/or the at least one second electrode; wherein a two-dimensional mode of mechanical vibration in a cross sectional plane of the piezoelectric layer is sensed through piezoelectrically generated charge collected by the at least one first electrode and/or the at least one second electrode; wherein the cross sectional plane extends along the width direction and the thickness direction; wherein the frequency of the two-dimensional mode of mechanical vibration is dependent on both the width direction and the thickness direction of the resonator structure; and wherein electromechanical coupling of the two-dimensional mode of mechanical vibration is dependent on a numerical ratio of the thickness and the width, T/W.