Bernhard Boser (Advisor)

Piezoelectric Micromachined Ultrasonic Transducers for Ultrasonic Fingerprint Sensors

Joy (Xiaoyue) Jiang
David A. Horsley
Liwei Lin
Bernhard E. Boser
George C. Johnson
2018

A variety of physical mechanisms have been exploited to capture electronic images of a human fingerprint, including optical, capacitive, pressure, and acoustic mechanisms. Compared to other technologies, ultrasonic fingerprint sensors have two major advantages (1) they are insensitive to contamination and moisture on the finger (2) they have the ability to measure images at multiple depths hundreds of microns from the sensor surface. With the maturity of the thin film piezoelectric materials technology and MEMS-CMOS eutectic wafer-bonding process, piezoelectric micromachined...

MicroElectroMechanical Devices and Fabrication Technologies for Radio-Frequency Analog Signal Processing

Darrin Young
Bernhard E. Boser
Robert G. Meyer
Albert P. Pisano
1999
The proliferation of wireless services creates a pressing need for compact and low cost RF transceivers. Modern sub-micron technologies provide the active components needed for miniaturization but fail to deliver high quality passives needed in ...

Darrin Young

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
Ph.D. 1999

Integrated Micromechanical Resonant Sensors for Inertial Measurement Systems

Ashwin Seshia
Roger T. Howe
Bernhard E. Boser
Kristofer S.J. Pister
Roberto Horowitz
2002
Thumbnail-sized inertial measurement systems based on Micro Electro Mechanical Systems (MEMS) technology have been perceived as a breakthrough in the field of inertial navigation. However, even as micromechanical accelerometers have seen widespread commercialization, vibratory micromechanical gyroscopes...

Vladimir Petkov

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
Ph.D. 2004

High-Order ΣΔ Interface for Micromachined Inertial Sensors

Vladimir Petkov
Bernhard E. Boser
Roger T. Howe
Roberto Horowitz
2004
Emerging automotive and consumer applications such as vehicle stability control, GPS backup and many others are generating a growing demand for inertial sensors with an increasing range of functionality including digital interfacing, built-in self-test, calibration and temperature compensation. Among various techniques for implementing inertial sensor interfaces, Σ∆ modulation provides the benefits of intrinsically linear, two-level force-feedback and analog-to-digital conversion....

Electronics for Resonant Sensors

Kenneth Wojciechowski
Bernhard E. Boser
Liwei Lin
Roger T. Howe
2005
Resonant force or displacement sensing based on observing the change in resonant frequency is attractive because of its relative insensitivity to 1/f noise, high resolution and bandwidth, and “quasi-digital” output. Applications include inertial and strain sensors, biosensors based on mass-loading, and atomic force microscopy. The main contributions of this dissertation are Design of low-noise high fidelity MEMS resonators for sensing, ...

Kenneth Wojciechowski

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
Ph.D. 2005

Baris Cagdaser

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
Ph.D. 2005

Chinwuba Ezekwe

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
Ph.D. 2007