Patent ID: 11916535
Assignee: SKYWORKS GLOBAL PTE. LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for fabricating a bulk acoustic resonator, the method comprising:
forming a first electrode having a first lateral shape;
providing a piezoelectric layer on the first electrode; and
forming a second electrode having a second lateral shape on the piezoelectric layer such that the piezoelectric layer is between the first and second electrodes, the forming of the first electrode and the forming of the second electrode including selecting and arranging the first and second lateral shapes to provide a resonator shape defined by an outline of an overlap of the first and second electrodes, the resonator shape including N smooth curves joined by N vertices of an N-sided polygon having an inside, each vertex joining two neighboring smooth curves such that the two neighboring smooth curves combined is not a smooth curve due to the respective vertex, each smooth curve having a concave shape with respect to the inside of the N-sided polygon, the resonator shape selected to have no axis of symmetry.