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BPN722: Ultrasonic Fingerprint Sensor Using Piezoelectric Micromachined Ultrasonic Transducers (PMUTs)

Project ID BPN722
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Start Date Wed 2013-Aug-14 21:51:30
Last Updated Wed 2014-Feb-26 18:29:52
Abstract The proliferation of electronic devices such as smartphones creates a pressing need for reliable biometric authentication. Present solutions such as capacitive fingerprint sensors have failed to gain wide acceptance due to there susceptibility to contamination from oils, perspiration, and dirt. Ultrasonic fingerprint sensors solve these problems but currently available devices too large and costly for deployment in consumer devices. The goal of this project is to fabricate a fingerprint sensor based on a piezoelectric micro-machined ultrasonic transducer (PMUT) array and integrated electronics. A test chip comprising an 8 by 24 array of PMUTs fabricated on a 125um pitch and per-transducer readout electronics is presently in fabrication.
Status Continuing
Funding Source BSAC Member Fees
IAB Research Area Physical Sensors & Devices
Researcher(s) Hao-Yen Tang, Yipeng Lu
Advisor(s) Bernhard E. Boser
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