Liwei Lin (Advisor)

Research Advised by Professor Liwei Lin

Lin Group:  List of Projects | List of Researchers

Kaiyuan Yao

Alumni
Mechanical Engineering
Professor Liwei Lin (Advisor)
M.S. 2015, Ph.D. 2019

Silicon Carbide Bipolar Junction Transistors for High Temperature Sensing Applications

Nuo Zhang
Albert P. Pisano
Tsu-Jae King Liu
Liwei Lin
2014

An integrated sensing module capable of operating at high temperatures would be beneficial to a number of industrial applications, such as automotive industries, aerospace systems, industrial turbines and deep-well drilling telemetric systems. Consider industrial turbines as an example. It is important to monitor a variety of physical parameters within the hot sections of the turbines in order to increase turbine efficiency, reliability and to reduce pollution. In addition, real-time monitoring can help to detect and predict the failures of critical components in a timely fashion to...

Finite Element Analysis of the Effects of Package Induced Stress on Micromechanical Resonator Temperature Stability

Divya Kashyap
Clark T.-C. Nguyen
Liwei Lin
2015

Vacuum encapsulation of RF disk and beam resonators is often needed to maintain high quality factor and frequency stability. Conventionally, this is performed at the wafer level by anodic, eutectic, fusion, or glass frit bonding. After wafer dicing, packaging proceeds with die attach to the package substrate and plastic over molding. This process leads to many contacts between materials of different coefficients of thermal expansion (CTE) resulting in package-induced stress. The focus of this work is to determine the effect of this stress on the temperature stability of...

Zhichun Shao

Alumni
Mechanical Engineering
Professor Liwei Lin (Advisor)
Ph.D. 2021, M.A. 2019

Zhichun Shao received his B.S. in Engineering Mechanics from Tsinghua University, China in 2017 and M.S. in Mechanical Engineering from the University of California, Berkeley in 2019. He is currently pursuing a Ph.D. in MEMS/Nano in Mechanical Engineering at UC Berkeley under the supervision of Professor Liwei Lin.

Jacqueline Elwood

Alumni
Mechanical Engineering
Professor Liwei Lin (Advisor)
Ph.D. 2021

Received a B.S in Nanoscale Engineering at the SUNY University at Albany in Albany, NY. Joined the Liwei Lin Lab in Aug 2016 where research has focused on creating multi-functional, multi-material 3D printed systems.

BPN799: 3D Printed Microsensors

Jacqueline Elwood
2021

We aim to develop multi-functional, multi-material 3D printed structures for the development of 3D printed microsensors. Using these multi-functional 3D printed structures, we plan to demonstrate simple sensing platforms, such as EtOH sensing for monitoring of food quality, fermentation, or ethanol content in the body, for proof-of-concept in combining conductive materials with commercially available 3D printing materials or 3D printers. Upon further development, this combination could prove critical in resolving the foremost limitations of conventional diagnostic devices (i.e....

Ultra High Frequency Piezoelectric Resonators: Suspension and Elastic Coupling

James Porter
Albert P. Pisano
Roger T. Howe
Liwei Lin
2004

In this research project, the suspension and elastic coupling of Film Bulk AcousticResonators (FBAR) has been investigated. Individual resonators and small arrays of AlN FBARs have been designed and fabricated in a post-CMOS compatible process. Suspensions based on networks of thin beams did not perform well, but m...

Microresonators as Vacuum Gauges

Sharon Oh
Roger T. Howe
Liwei Lin
2001
Resonators are sensitive to physical inputs such as pressure and force. The parameters of interest are measured by the shift in resonance frequency. The ease of measurement and their high sensitivity make resonators an attractive means of measuring many...

Pressure Driven Microflow Through a Double-T Metering Section

Luke Hunter
Albert P. Pisano
Liwei Lin
2003

Many assay devices require metering a calibrated amount of sample foranalysis. As mobile/handheld assay devices become closer to realization, power usage becomes more critical for all system components. Current designs utilize electrokinetically driven flow and well-defined channel geome...

Integrated MEMS Technologies for Adaptive Optics

Blake Lin
Richard S. Muller
Tsu-Jae King Liu
Liwei Lin
2008

Image resolutions of modern optical systems are many times limited by wavefront aberrations due to turbulence in the optical media. Adaptive Optics (AO) is a technology that utilizes deformable mirrors (DM) to correct the wavefront distortion, thereby enhancing the image resolution. In this research, we investigate the design and fabrication of micromechanical-deformable-mirror arrays for AO applications. The mirror arrays are produced using surface micromachining techniques developed for the fabrication of Microelectromechanical Systems (MEMS).

Because many AO...