Patent ID: 11950512
Assignee: APPLE INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B  H  G | IPC H

Claim 13:
14. An acoustic imaging system configured to adhere to an interior surface of a portable electronic device, the acoustic imaging system comprising:
an adhesive layer configured to acoustically couple to the interior surface;
a high acoustic impedance stack comprising:
an actuator layer comprising an array of piezoelectric actuators formed below the adhesive layer;
an array of electrode pairs, each associated with a respective piezoelectric actuator of the actuator layer, each electrode pair comprising:
a first electrode disposed between the adhesive layer a top surface of the respective piezoelectric actuator; and
a second electrode disposed on a bottom surface of the respective piezoelectric actuator opposite and parallel to the first electrode; and

a metalloid oxide layer encapsulating the array of electrode pairs against a second surface of the actuator layer; and

an application-specific integrated circuit formed below and coupled to the metalloid oxide layer of the high acoustic impedance stack, the application-specific integrated circuit conductively coupled to the array of electrode pairs.