Wei-Chang Li
Institute of applied Mechanics, National Taiwan University, Taiwan (R.O.C.)
Date : 30 juin 2026
Heure : 14h00 – 15h30
Lieu : École de technologie supérieure, Pavillon A, salle A-1300 (1100, rue Notre-Dame Ouest, Montréal)
Résumé: Micromechanical vibro-impact resonators operate in a strongly nonlinear regime defined by physical collisions between the resonator structure and its output electrodes or mechanical stoppers. Unlike conventional linear resonators—used primarily as timing and frequency references—these devices exploit their contact dynamics to unlock a range of novel functionalities. In this talk, I will present recent progress on vibro-impact devices built using a CMOS-MEMS fabrication platform. I will focus on advances in the design and fabrication of 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. Together, these examples illustrate how the rich nonlinear dynamics intrinsic to vibro-impact operation can be engineered into practical device functionality.
Note biographique: 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 has been an Associate Professor since 2021. His research interests center on nonlinear resonator-enabled technology and advanced micro-fabrication, including zero-quiescent-power RF receivers, surface monitoring sensors, and ultra-low-power integrated sensor technologies. He has served as a Technical Program Committee Member of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS) in 2024 and 2025 and the International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS) in 2023 and 2025, and is a Frequency Control Standing Committee Member of the IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society. He and his students received the Best Student Paper Award at the 2026 IEEE International Frequency Control Symposium (IFCS), as well as the National Applied Research Laboratories—Taiwan Semiconductor Research Institute Outstanding Chip Design Award from 2020 to 2025.
