Ultrasonic sensor, fingerprint recognition apparatus, and electronic device
AssigneeEgis Technology Inc.
InventorsBRUCE C. S. CHOU, CHEN-CHIH FAN
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Abstract
An ultrasonic sensor includes a substrate, a piezoelectric transducer on the substrate, a first chip on the substrate and electrically connected to the piezoelectric transducer. The first chip includes one type of a transmitter chip, a receiver chip, or an integrated chip. The integrated chip integrates circuits of the transmitter chip and the receiver chip. The ultrasonic sensor can shorten the transmission path between the piezoelectric transducer and the first chip, and help to reduce the size of the sensor.
Claims19
An ultrasonic sensor comprising:
- a substrate;
- a piezoelectric transducer on the substrate;
- a first chip on the substrate and electrically connected to the piezoelectric transducer, the first chip including one type of a transmitter chip, a receiver chip, or an integrated chip, wherein the integrated chip integrates circuits of the transmitter chip and the receiver chip.
A fingerprint recognition apparatus, comprising an ultrasonic sensor, wherein the ultrasonic sensor comprises:
- a substrate;
- a piezoelectric transducer on the substrate;
- and
- a first chip on the substrate and electrically connected to the piezoelectric transducer, the first chip including one type of a transmitter chip, a receiver chip, or an integrated chip, wherein the integrated chip integrates circuits of the transmitter chip and the receiver chip.
An electronic device, comprising:
- a fingerprint recognition apparatus comprising an ultrasonic sensor, the ultrasonic sensor comprising:
- a substrate;
- a piezoelectric transducer on the substrate;
- and
- a first chip on the substrate and electrically connected to the piezoelectric transducer, the first chip including one type of a transmitter chip, a receiver chip, or an integrated chip, wherein the integrated chip integrates circuits of the transmitter chip and the receiver chip.
Dependencies are inferred from the claim text.