Patent ID: 11910716
Assignee: QUALCOMM INCORPORATED
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 16:
17. An apparatus comprising:
an ultrasonic sensor stack configured to transmit and receive ultrasonic waves;
a foldable display stack comprising a first stiffener;
a second stiffener between the ultrasonic sensor stack and the foldable display stack; and
a first adhesive layer between the second stiffener and the first stiffener, wherein a multi-layer stiffener is formed by at least the first stiffener, the second stiffener, and the first adhesive layer, wherein each of the first stiffener and the second stiffener has a Young's modulus greater than about 10 GPa, and an acoustic impedance value of greater than about 8.0 MRayls.