Patent ID: 11917918
Assignee: NINGBO SEMICONDUCTOR INTERNATIONAL CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  H  G | IPC G  H

Claim 0:
1. A fingerprint identification module, comprising:
a substrate;
a signal processing circuit formed in the substrate;
a permanent bonding layer bonded to the substrate, the permanent bonding layer containing one or more cavities;
one or more piezoelectric transducers, located over the permanent bonding layer, wherein
a piezoelectric transducer of the one or more piezoelectric transducers includes a first electrode, a second electrode under the first electrode, and a piezoelectric layer between the first electrode and the second electrode,
the second electrode of each piezoelectric transducer fully covers one cavity, and

a second conductive plug electrically connected to the second electrode and formed on a side of the second electrode opposite to the cavity, the second conductive plug passing through the piezoelectric layer.