Patent ID: 11870410
Assignee: NINGBO SEMICONDUCTOR INTERNATIONAL CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A packaging method of a film bulk acoustic resonator, comprising:
providing a resonant cavity main structure, wherein the resonant cavity main structure includes a first substrate and a film bulk acoustic resonant structure formed on the first substrate, wherein a first cavity is formed between the first substrate and the film bulk acoustic resonant structure;
forming a resonator cover by providing a second substrate and forming an elastic bonding material layer containing a second cavity within the elastic bonding material layer on the second substrate;
bonding the resonant cavity main structure and the resonator cover together by bonding the elastic bonding material layer to the film bulk acoustic resonant structure on the first substrate and removing elasticity of the elastic bonding material layer, wherein after the bonding process, the film bulk acoustic resonant structure is sandwiched between the first substrate and the second substrate and the second cavity is at least partially aligned with the first cavity;
forming a through-hole penetrating through the second substrate and the elastic bonding material layer of the resonator cover and exposing a corresponding electrical connection part of the film bulk acoustic resonant structure; and
forming a conductive interconnection layer on a sidewall of the through-hole and on a portion of a surface of the resonator cover at a periphery of the through-hole.