Micro Structures & Sensors Lab
Kenny Group @ Stanford

Vu Hong


PhD Candidate

vuhong :at: mems.stanford.edu

Advisor: Thomas W. Kenny

Research

Single crystal silicon fatigue
Stiction in vacuum encapsulated environments
Capacitive sensor fusion and integration

Integrated Epi-Seal MEMS

Fatigue Study of Silicon Using Encapsulated MEMS Resonators


Education

Stanford University
(June 2012 - present) PhD candidate in Mechanical Engineering

Stanford University
(June 2012) MS in Mechanical Engineering

Massachusetts Institute of Technology (MIT)
(June 2010) SB in Mechanical Engineering

Experience

Micro Structures and Sensors Laboratory
(Sept 2010 - present) Graduate Research Assistant

Palo Alto Research Center (PARC)
Hardware Systems Laboratory Intern (Jun 2010 - Aug 2010)

Laboratory for Manufacturing and Productivity (MIT)
Undergraduate Researcher (Jun 2007 - Jan 2009)

Solidworks Corporation
Quality Assurance Intern (Jun 2008 - Aug 2008)

Fellowships / Awards

NSF Graduate Research Fellowship
Tau Beta Pi
Pi Tau Sigma
Sigma Xi
MIT Energy Initiative (MITEI) Martin Family Scholarship

Publications

Journal
Shirin Ghaffari, Eldwin Jiaqiang Ng, Chae Hyuck Ahn, Yushi Yang, Shasha Wang, Vu A. Hong, and Thomas W. Kenny, "Accurate Modeling of Quality Factor Behavior of Complex Silicon MEMS Resonators," Journal of Microelectromechanical Systems, Vol. 24, No. 2, pp. 276-288, Apr 2015.
Journal
Chae Hyuck Ahn, Eldwin J. Ng, Vu A. Hong, Yushi Yang, Brian J. Lee, Ian Flader, Thomas W. Kenny, "Mode-Matching of Wineglass Mode Disk Resonator Gyroscope in (100) Single Crystal Silicon," Journal of Microelectromechanical Systems, Vol. 24, No. 2, pp. 343-350, Apr 2015.
Journal
Vu A. Hong, Shingo Yoneoka, Matthew W. Messana, Andrew B. Graham, James C. Salvia, Todd T. Branchflower, Eldwin J. Ng, and Thomas W. Kenny, "Fatigue Experiments on Single Crystal Silicon in an Oxygen-Free Environment," Journal of Microelectromechanical Systems, Vol. 24, No. 2, pp. 351-359, Apr 2015.
Conference
E. Ng, Y. Yang, V.A. Hong, C.H. Ahn, D.B. Heinz, I. Flader, Y. Chen, C.L.M. Everhart, B. Kim, R. Melamud, R.N. Candler, M.A. Hopcroft, J.C. Salvia, S. Yoneoka, A.B. Graham, M. Agarwal, M.W. Messana, K.L. Chen, H.K. Lee, S. Wang, G. Bahl, V. Qu, C.F. Chiang, T.W. Kenny, A. Partridge, M. Lutz, G. Yama, and G.J. O'Brien, "The long path from MEMS resonators to timing products," 2015 28th IEEE International Conference on Micro Electro Mechanical Systems (MEMS), pp. 1-2, Jan 2015.
Conference
D. Senkal, E.J. Ng, V. Hong, Y. Yang, C.H. Ahn, T.W. Kenny, and A.M. Shkel, "Parametric drive of a toroidal MEMS rate integrating gyroscope demonstrating < 20 PPM scale factor stability," 2015 28th IEEE International Conference on Micro Electro Mechanical Systems (MEMS), pp. 29-32, Jan 2015.
Conference
Igor I. Izyumin, Mitchell H. Kline, Yu-Ching Yeh, Burak Eminoglu, Chae Hyuck Ahn, Vu A. Hong, Yushi Yang, Eldwin J. Ng, Thomas W. Kenny, and Bernhard E. Boser, "A 7ppm, 6°/hr frequency-output MEMS gyroscope," 2015 28th IEEE International Conference on Micro Electro Mechanical Systems (MEMS), pp. 33-36, Jan 2015.
Conference
D.B. Heinz, V.A. Hong, T.S. Kimbrell, J. Stehle, C.H. Ahn, E.J. Ng, Y. Yang, G. Yama, G.J. O'Brien, and T.W. Kenny, "Stiction forces and reduction by dynamic contact in ultra-clean encapsulated MEMS devices," 2015 28th IEEE International Conference on Micro Electro Mechanical Systems (MEMS), pp. 393-396, Jan 2015.
Conference
Yushi Yang, Eldwin Ng, Pavel Polunin, Yunhan Chen, Scott Strachan, Vu Hong, Chae Hyuck Ahn, Ori Shoshani, Steven Shaw, Mark Dykman, and Thomas Kenny, "Experimental investigation on mode coupling of bulk mode silicon MEMS resonators," 2015 28th IEEE International Conference on Micro Electro Mechanical Systems (MEMS), pp. 1008-1011, Jan 2015.
Journal
C. H. Ahn, S. Nitzan, E. J. Ng, V. A. Hong, Y. Yang, T. Kimbrell, D. A. Horsley, and T. W. Kenny, "Encapsulated high frequency (235 kHz), high-Q (100 k) disk resonator gyroscope with electrostatic parametric pump," Applied Physics Letters, Vol. 105, No. 24, pp. 243504, Dec 2014.
Journal
Bo Woon Soon, Eldwin J. Ng, Vu A. Hong, Yushi Yang, Chae Hyuck Ahn, You Qian, Thomas W. Kenny, and Chengkuo Lee, "Fabrication and Characterization of a Vacuum Encapsulated Curved Beam Switch for Harsh Environment Application," Journal of Microelectromechanical Systems, Vol. 23, No. 5, pp. 1121-1130, Dec 2014.
Journal
Eldwin J. Ng, Vu A. Hong, Yushi Yang, Chae Hyuck Ahn, Camille L. M. Everhart, and Thomas W. Kenny, "Temperature Dependence of the Elastic Constants of Doped Silicon," Journal of Microelectromechanical Systems, Aug 2014.
Conference
J. Lake, Y.-H. Hwang, E. Ng, C.-H. Ahn, V. Hong, Y. Yang, Y. Dai, and R. Candler, "Experimental Validation of 3D Intuitive Modeling Approach for Anchor Loss in MEMS Resonators," Solid-State Sensors, Actuators, and Microsystems Workshop, Hilton Head 2014, pp. 277-280, Jun 2014.
Conference
C.L. Roozeboom, B.E. Hill, V.A. Hong, C.H. Ahn, E.J. Ng, Y. Yang, M.A. Hopcroft, and B.L. Pruitt, "Multifunctional Integrated Sensor Monitoring," Solid-State Sensors, Actuators, and Microsystems Workshop, Hilton Head 2014, pp. 447-448, Jun 2014.
Conference
Yushi Yang, Eldwin J. Ng, Vu A. Hong, Chae Hyuck Ahn, Yunhan Chen, Elia Ahadi, Mark Dykman, and Thomas W. Kenny, "Measurement of the nonlinear elasticity of doped bulk-mode MEMS resonators," Solid-State Sensors, Actuators, and Microsystems Workshop, Hilton Head 2014, pp. 285-288, Jun 2014.
Conference
M. Li, S. Sonmezoglu, E.J. Ng, V.A. Hong, C.H. Ahn, Y. Yang, T.W. Kenny, and D.A. Horsley, "Lorentz force magnetometer with quadratrue frequency modulation," Solid-State Sensors, Actuators, and Microsystems Workshop, Hilton Head 2014, pp. 52-55, Jun 2014.
Conference
J. Stehle, V.A. Hong, A. Feyh, G.J. O’Brien, G. Yama, O. Ambacher, B. Kim, and T.W. Kenny, "Silicon migration of through-holes in single- and poly-crystalline silicon membranes," Solid-State Sensors, Actuators, and Microsystems Workshop, Hilton Head 2014, pp. 32-35, Jun 2014.
Conference
S. Nitzan, T-H. Su, C. Ahn, E. Ng, V. Hong, Y. Yang, T. Kenny, and D. A. Horsley, "Impact of gyroscope operation above the critical bifurcation threshold on scale factor and bias instability," 2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 749-752, Jan 2014.
Conference
David B. Heinz, Vu A. Hong, Eldwin J. Ng, Chae Hyuck Ahn, Yushi Yang, and Thomas W. Kenny, "Characterization of stiction forces in ultra-clean encapsulated MEMS devices," 2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 588-591, Jan 2014.
Conference
C. L. Roozeboom, V. A. Hong, C. H. Ahn, E. J. Ng, Y. Yang, B. E. Hill, M. A. Hopcroft, and B. L. Pruitt, "Multifunctional integrated sensor in A 2×2 mm epitaxial sealed chip operating in a wireless sensor node," 2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 773-776, Jan 2014.
Conference
Mo Li, Eldwin J. Ng, Vu A. Hong, Chae H. Ahn, Yushi Yang, Thomas W. Kenny, and David A. Horsley, "Single-structure 3-axis lorentz force magnetometer with sub-30 nT/√HZ resolution," 2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 80-83, Jan 2014.
Conference
D. Senkal, S. Askari, M. J. Ahamed, E. J. Ng, V. Hong, Y. Yang, C. H. Ahn, T. W. Kenny, and A. M. Shkel, "100K Q-factor toroidal ring gyroscope implemented in wafer-level epitaxial silicon encapsulation process," 2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 24-27, Jan 2014.
Conference
E. J. Ng, Y. Yang,V. A. Hong, C. H. Ahn, D. L. Christensen, B. A. Gibson, K. R. Qalandar, K. L. Turner, T. W. Kenny, "Stable Pull-In Electrodes for Narrow Gap Actuation," IEEE International Conference on Micro Electro Mechanical Systems (MEMS) 2014, pp. 1281-1284, Jan 2014.
Conference
E. J. Ng, K. L. Harrison, C. L. Everhart, V. A. Hong, Y. Yang, C. H. Ahn, D. B. Heinz, R. T. Howe and T. W. Kenny, "Stable Charge-Biased Capacitive Resonators with Encapsulated Switches," IEEE International Conference on Micro Electro Mechanical Systems (MEMS) 2014, pp. 1277-1280, Jan 2014.
Journal
Shirin Ghaffari, Saurabh A. Chandorkar, Shasha Wang, Eldwin J. Ng, Chae H. Ahn, Vu Hong, Yushi Yang, and Thomas W. Kenny, "Quantum Limit of Quality Factor in Silicon Micro and Nano Mechanical Resonators," Scientific Reports, Vol. 3, Nov 2013.
Journal
M. Li, E. J. Ng, V. A. Hong, C. H. Ahn, Y. Yang, T. W. Kenny, and D. A. Horsley, "Lorentz force magnetometer using a micromechanical oscillator," Applied Physics Letters, Vol. 103, No. 17, pp. 173504, Oct 2013.
Conference
J. Lake, E. Ng, C.-H. Ahn, V. Hong, Y. Yang, J. Wong, and R. Candler, "Particle swarm optimization for design of MEMS resonators with low thermoelastic dissipation," 2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), pp. 1456-1459, Jun 2013.
Conference
Y. Yang, E. J. Ng, C. H. Ahn, V. A. Hong, E. Ahadi, and T. W. Kenny, "Mechanical coupling of dual breathe-mode ring resonator," 2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), pp. 502-505, Jun 2013.
Conference
V. A. Hong, B. J. Lee, D. L. Christensen, D. B. Heinz, E. J. Ng, C. H. Ahn, Y. Yang, and T. W. Kenny, "X-Y and Z-axis capacitive accelerometers packaged in an ultra-clean hermetic environment," 2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), pp. 618-621, Jun 2013.
Conference
E. J. Ng, C.-F. Chiang, Y. Yang, V. A. Hong, C. H. Ahn, and T. W. Kenny, "Ultra-high aspect ratio trenches in single crystal silicon with epitaxial gap tuning," 2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), pp. 182-185, Jun 2013.
Conference
E. J. Ng, C. H. Ahn, Y. Yang, V. A. Hong, C.-F. Chiang, E. Ahadi, M. W. Ward, and T. W. Kenny, "Localized, degenerately doped epitaxial silicon for temperature compensation of resonant MEMS systems," 2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), pp. 2419-2422, Jun 2013.
Conference
C. H. Ahn, E. J. Ng, V. A. Hong, Y. Yang, B. J. Lee, M. W. Ward, and T. W. Kenny, "Geometric compensation of (100) single crystal silicon disk resonating gyroscope for mode-matching," 2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), pp. 1723-1726, Jun 2013.
Conference
D. L. Christensen, C. H. Ahn, V. A. Hong, E. J. Ng, Y. Yang, B. J. Lee, and T. W. Kenny, "Hermetically encapsulated differential resonant accelerometer," 2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), pp. 606-609, Jun 2013.
Conference
V. A. Hong, S. Yoneoka, M. W. Messana, A. B. Graham, J. C. Salvia, T. T. Branchflower, E. J. Ng, and T. W. Kenny, "High-stress fatigue experiments on single crystal silicon in an oxygen-free environment," Solid-State Sensors, Actuators, and Microsystems Workshop, Hilton Head 2012, pp. 453-456, Jun 2012.