BERKELEY SENSOR & ACTUATOR CENTER
UC BERKELEY UC DAVIS
User: Guest |  Site Map |  My BSAC Profile
HOME  PROJECTS  THRUSTS  PUBLICATIONS  ABOUT BSAC  DIRECTORY  ALUMNI  FOR BSAC RESEARCHERS  EVENTS CALENDAR  SECURE LOGIN
Researchers
     
 
Joy (Xiaoyue) Jiang, Ph.D. 2018

Mechanical Engineering
Advisor: Prof. Lin/Horsley

BIOGRAPHY
Joy Jiang received the B.S. degree in mechanical engineering from University of Rochester in 2013 and the M.S. degree in electrical engineering from the University of California, Berkeley in 2015. Currently she is a Graduate Student Researcher in the Berkeley Sensor and Actuator Center (BSAC) at the University of California, Berkeley, pursuing her Ph.D. in mechanical engineering. Her research interests include MEMS sensors and actuators for acoustic sensors applications. She is a recipient of the Outstanding Student Paper Award at the IEEE MEMS 2016 Conference.

Novel Ultrasonic Fingerprint Sensor Based on High-Frequency Piezoelectric Micromachined Ultrasonic Transducers (PMUTs) [BPN628]
This project presents the first MEMS ultrasonic fingerprint sensor with the capability to image epidermis and dermis layer fingerprints. The sensor is based on a piezoelectric micromachined ultrasonic transducer (PMUT) array that is bonded at wafer-level to complementary metal oxide semiconductor (CMOS) signal processing electronics to produce a pulse-echo ultrasonic imager on a chip. To meet the 500 DPI standard for consumer fingerprint sensors, the PMUT pitch was reduced by approximately a factor of two relative to an earlier design. We conducted a systematic design study of the individual PMUT and array to achieve this scaling while maintaining a high fill-factor. The resulting 110X56 PMUT array, composed of 30um X 43um rectangular PMUTs achieved a 51.7% fill-factor, three times greater than that of the previous design. Together with the custom CMOS ASIC, the sensor chieves 2 uV/Pa sensitivity, 19 kPa peak-to-peak pressure output, 75 um lateral resolution, and 150 um axial resolution in a 4.6 mm X 3.2 mm image.


Current Active Projects:
BPN628
 

     Last Updated: Fri 2016-Dec-02 14:46:16

back to Researchers



 

  • Copyright Notification: All papers downloaded from this site are © University of California or the publisher, all rights reserved. Contact the BSAC Webmaster for permission related to copyrighted materials.
  • Links on these pages to commercial sites do not represent endorsements by UC or its affiliates.
  • Privacy Policy
  • Contact Us

   webmaster@bsac.eecs.berkeley.edu
  User logged in as: Guest
  User Idle since: December 5, 2016, 6:51 pm