Patent ID: 11967938
Assignee: RF360 SINGAPORE PTE. LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 28:
29. A method for manufacturing an apparatus including an acoustic filter package comprising:
forming a base layer;
forming a support layer disposed on the base layer;
forming a piezoelectric structure disposed on the support layer,
wherein the forming the piezoelectric structure comprises:
forming a piezoelectric layer;
forming a top electrode on a top surface of the piezoelectric layer;
forming a bottom electrode on a bottom surface of the piezoelectric layer;
forming a contact pad coupled to the bottom electrode that extends through an opening in the piezoelectric layer and is coupled to the bottom electrode or the top electrode;
forming a first dielectric layer over the piezoelectric structure, the top electrode, and at least a portion of the contact pad;
forming a corrosion resistant pad disposed on the contact pad;
forming a second dielectric layer over the first dielectric layer and at least a portion of the corrosion resistant pad; and
forming a capping structure disposed on the piezoelectric structure,

wherein the portion of the corrosion resistant pad is over a portion of the first dielectric layer that is over the portion of the contact pad.