Patent ID: 8522411
Filing Date: 2013-09-03
Classification: H03H,Y10T

Abstract:
1. A method of fabricating a piezoelectric resonator, the method comprising: a. providing a bottom electrode and a piezoelectric layer coupled to the bottom electrode; b. depositing a bottom metal layer of a top electrode on the piezoelectric layer; c. depositing a top metal layer of the top electrode on the bottom metal layer; d. depositing a photoresist layer on the top metal layer; e. patterning and etching the photoresist layer; f. patterning and etching the top metal layer using the etched photoresist layer; g. patterning and etching the bottom metal layer using the etched photoresist layer such that an entire perimeter side surface of the top metal layer is recessed relative to a perimeter edge of the bottom metal layer; h. removing the etched photoresist layer; and l. depositing a passivation layer on the top metal layer and the bottom metal layer such that the top metal layer and the bottom metal layer are isolated from a subsequent metal etch step.