Patent ID: 9577603
Date: 2017-02-21
CPC Classifications: H03H

Claim:
1. A solidly mounted resonator (SMR), comprising: an acoustic reflector over a substrate, the acoustic reflector comprising a plurality of acoustic impedance layers having different acoustic impedances, respectively; a bottom electrode on a top acoustic impedance layer of the plurality of acoustic impedance layers; a piezoelectric layer on the bottom electrode; a top electrode on the piezoelectric layer; and a plurality of lateral features on a surface of the top electrode, the plurality of lateral features corresponding to a plurality of stepped structures forming one of an ascending or descending stair step pattern, wherein respective edges of the plurality of stepped structures form corresponding vertical interfaces arranged in the one of the ascending or descending stair step pattern, each of the respective edges forming the corresponding vertical interfaces being substantially perpendicular to the surface of the top electrode.