1.51-GHz with Q
>10,000 Even in Air!
A result of
purposely impedance-mismatching a polydiamond disk with its polysilicon stem.
1.2-GHz with Q = 14,600!
Who says diamond is needed to get Q
>10,000 at GHz frequencies? With the right "hollow-disk" ring
design, polysilicon can do even better than diamond.
60-MHz Wine-Glass Disk Oscillator Makes
the GSM Reference Oscillator Spec!
handling and a Q >50,000 crucial in making the spec.
Arraying for Impedance <480W at 72MHz!
coupled resonator arrays automatically align resonator frequencies to allow
output summation for low impedance and higher power handling.
Micromechanical Resonator Wins
Best Paper Award at the 2005 IEEE Int. Frequency Control Symposium!
to Yu-Wei Lin for winning the Best Frequency Control Paper Award at the 2005
IEEE Int. Frequency Control Symposium.
Clock Overview Paper Wins the Jack Raper Award at the
2005 IEEE Int. Solid-State Circuits Conference!
to all those in the CSAC program (which Prof. Nguyen ran while at DARPA),
especially John Kitching from NIST, who co-authored this paper.
Vibrating RF MEMS Wins
Best Invited Paper Award at the 2004 IEEE Custom Integrated Circuits
Read this for an
overview on vibrating RF MEMS.
Oscillator Wins 2004 UFFC
Symposium Best Frequency Control Paper Award!
to Seungbae Lee for winning the Best Frequency Control Paper Award at the 2004
IEEE Ultrasonics, Ferroelectrics, and Frequency Control 50th Anniv. Joint
Resonator Work Wins 2003 IEDM Best Paper Award!
to Yuan Xie for winning the 2003 Int. Electron Devices Meeting Roger A. Haken
Best Student Paper Award.
High-Q and Low Motional Resistance (2010)
Hung and C. T.-C. Nguyen, Q-boosted
AlN array-composite resonator with Q
>10,000, Tech. Digest, IEEE Int. Electron Devices Mtg.,
San Francisco, California, Dec. 6-8, 2010, pp. 162-165
Akgul, B. Kim, Z. Ren, and C. T.-C. Nguyen, Capacitively
transduced micromechanical resonators with simultaneous low motional
resistance and Q
>70,000, Tech. Digest,
2008 Solid-State Sensor, Actuator, and Microsystems Workshop, Hilton
Head, South Carolina, June 6-10, 2010, pp. 467-470.
Hung and C. T.-C. Nguyen, Capacitive-piezo transducers for higher
Q contour-mode AlN
resonators at 1.2 GHz, Tech.
Digest, 2008 Solid-State Sensor, Actuator, and Microsystems
Workshop, Hilton Head, South Carolina, June 6-10, 2010, pp. 463-466.
Kim, M. Akgul, Y. Lin, W.-C. Li, Z. Ren, and C. T.-C. Nguyen,
Acceleration sensitivity of small-gap capacitive micromechanical
resonator oscillators, Proceedings, 2010 IEEE Int. Frequency Control Symp., Newport Beach,
California, June 1-4, 2010, pp. 273-278.
Hung and C. T.-C. Nguyen, Silicide-Based Release of High Aspect
Ratio Microstructures, Tech.
Digest, 23rd IEEE Int. Conf. on Micro Electro
Mechanical Systems (MEMS10), Hong Kong, China, Jan. 24-28, 2010,