Patent ID: 11949398
Assignee: SHENZHEN NEWSONIC TECHNOLOGIES CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A semiconductor device, comprising:
a first sub-semiconductor structure, comprising a dielectric layer; and
a second sub-semiconductor structure, at least comprising a carrier substrate, and being bonded to the first sub-semiconductor structure,
wherein the first sub-semiconductor structure or the second sub-semiconductor structure comprises a charge accumulation preventing layer, and the charge accumulation preventing layer is disposed between the carrier substrate and the dielectric layer, and is configured to avoid an undesired conductive channel from being generated due to charge accumulation on a surface of the carrier substrate;
wherein the semiconductor device is a bulk acoustic wave resonator, and the first sub-semiconductor structure further comprises a piezoelectric layer, and a first electrode and a second electrode disposed on opposite sides of the piezoelectric layer, the dielectric layer is disposed between the piezoelectric layer and the second sub-semiconductor structure,
the bulk acoustic wave resonator has a cavity, and the cavity is disposed between the piezoelectric layer and the second sub-semiconductor structure, and is surrounded by the dielectric layer in a direction parallel to a main surface of the carrier substrate;
wherein the first sub-semiconductor structure further comprises a first bonding layer, and the first bonding layer is disposed along sidewalls of the dielectric layer and a surface of the dielectric layer at a side close to the second sub-semiconductor structure, and surfaces of the piezoelectric layer and the second electrode at a side close to the second sub-semiconductor structure; a first portion of the first bonding layer is bonded to the second sub-semiconductor structure, and the cavity is defined between a second portion of the first bonding layer and the second sub-semiconductor structure.