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

Claim 0:
1. An apparatus including an acoustic filter package comprising:
a base layer;
a support layer disposed on the base layer;
a piezoelectric structure disposed on the support layer,
wherein the piezoelectric structure comprises:
a piezoelectric layer;
a top electrode on a top surface of the piezoelectric layer;
a bottom electrode on a bottom surface of the piezoelectric layer;
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;
a corrosion resistant pad disposed on the contact pad;
a capping structure disposed on the piezoelectric structure;
a first dielectric layer over the piezoelectric layer, the top electrode, and at least a portion of the contact pad; and
a second dielectric layer over the first dielectric layer and at least a portion of the corrosion resistant pad, and

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.