Patent ID: 11942915
Assignee: RF360 SINGAPORE PTE. LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A bulk acoustic wave resonator device, comprising:
a bottom electrode and a top electrode; and
a piezoelectric layer having a first portion disposed between the bottom electrode and the top electrode, the first portion having a thickness, the piezoelectric layer having a second portion on at least two sides of the first portion, the second portion having a thickness different from the thickness of the first portion, wherein the piezoelectric layer has a first surface facing the bottom electrode and a second surface opposite the first surface, the second surface including: a first surface portion facing the top electrode; a second surface portion associated with at least a portion of the second portion of the piezoelectric layer; and a transitional surface portion disposed between the first and second surface portions of the second surface, wherein the transitional surface portion has an oblique orientation with regard to the first surface portion and the second surface portion of the second surface.