Patent ID: 11870422
Assignee: AKOUSTIS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A method comprising:
forming a piezoelectric layer on a substrate;
forming a first conductive layer on a first side of the piezoelectric layer;
patterning the first conductive layer to form a first electrode for an acoustic resonator;
forming a second conductive layer on a second side of the piezoelectric layer;
patterning the second conductive layer to form a second electrode of the acoustic resonator;
forming an insulating layer on the second conductive layer; and
forming an interconnection metal layer electrically connected to the second electrode layer or the first electrode layer and having a portion extending onto the insulating layer and overlapping a portion of the second conductive layer to provide a first capacitor electrode of a capacitor coupled to the first electrode and/or the second electrode, disposed laterally adjacent the acoustic resonator, and having a portion of the second conductive layer as a second capacitor electrode of the capacitor and a portion of the insulating layer between the first and second capacitor electrodes as a dielectric of the capacitor, wherein the acoustic resonator comprises a first acoustic resonator and a second acoustic resonator coupled in series and wherein the capacitor is coupled across the series combination of the first acoustic resonator and the second acoustic resonator.