Tuesday, 04 November 2025 at Noon | 490 Cory Hall
Register to attend in person here.
Professor Wei-Chang Li
Institute of Applied Mechanics | National Taiwan University
Host: Jun-Chau Chien, BSAC Co-Director
ABSTRACT
Micromechanical vibro-impact resonators, which operate in a highly nonlinear regime involving physical impacts between the resonator structure and output electrodes or stoppers, have enabled a range of novel applications that extend beyond conventional linear resonators used for timing and frequency reference. In this talk, I will present our recent progress in developing vibro-impact devices using a CMOS-MEMS fabrication platform. Specifically, I will highlight our advancements in perfecting CMOS-MEMS resoswitches and demonstrate their diverse applications, including zero quiescent-power communication receivers, on-chip surface condition monitoring, and controlled motion manipulation between dynamical attractors—all leveraging the rich nonlinear dynamics inherent to vibro-impact operation.
BIO
Wei-Chang Li received the B.S. and M.S. degrees in electrical engineering from National Taiwan University, Taipei, Taiwan, in 2003 and 2005, respectively, and the Ph.D. degree in electrical engineering from the University of California at Berkeley in 2015. He joined the Institute of Applied Mechanics at National Taiwan University as an Assistant Professor in 2016 and became an Associate Professor since 2021. His research interests lie in resonant switch (resoswitch)-enabled technology and advanced micro-fabrication technology and includes zero-quiescent power RF receivers, surface monitoring sensors, and ultra-low power integrated sensor technologies. He is a Technical Program Committee Member of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS) 2024 and 2025 and International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS) 2023 and 2025. He is a Frequency Control Steering Committee Member of the IEEE Ultrasonic, Ferroelectrics, and Frequency Control Society. He was a recipient of the Best Design Award of the National Applied Research Laboratories—Taiwan Semiconductor Research Institute Outstanding Chip Design Award from 2020 to 2025 (with his students).
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