Micro Structures & Sensors Lab
Kenny Group @ Stanford

Ian B. Flader


PhD Candidate

iflader :at: mems.stanford.edu
440 Escondido Mall, Bldg 530 Rm 224, Stanford, CA 94305, USA
Advisor: Thomas W. Kenny

Research

Novel processes for epitaxial encapsulation
Sensor integration and performance optimization
Disk resonating gyroscope design/characterization
Optimization techniques

Education

Stanford University
(2012 - present) PhD Candidate in Mechanical Engineering

Stanford University
(Winter 2013) M.S. in Mechanical Engineering

University of Tennessee
(2008 - 2012) B.S. in Mechanical Engineering

Experience

Schlumberger
(2012) Reliability Engineer
LEAN project leader and value mapping tools.

Schlumberger
(2011) Reliability Engineer
Statistical failure analysis of drilling tools.

Proven Technologies
(2010) Engineering Intern
Systems design and manufacture.

Fellowships / Awards

Best Student Paper Award (Track 1)
(2015) IEEE Sensors 2015 - "Tunable Quality Factor Through 1:1 Modal Coupling in a Disk Resonator"

Summa Cum Laude
(2012) University of Tennessee

Engineering Science Scholarship
(2012) University of Tennessee

Volunteer Scholarship
(2008-2012) University of Tennessee

HOPE Scholarship
(2008-2012) University of Tennessee

Publications

Conference
James M.L. Miller, Anne L. Alter, Nicholas E. Bousse, Yunhan Chen, Ian B. Flader, Dongsuk D. Shin, Thomas W. Kenny, Steven W. Shaw, "Influence of clamping loss and electrical damping on nonlinear dissipation in micromechanical resonators," 2022 IEEE 35th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 507-510, Jan 2022.
Journal
James M. L. Miller, Haoshen Zhu, Subramanian Sundaram, Gabrielle D. Vukasin, Yunhan Chen, Ian B. Flader, Dongsuk D. Shin, and Thomas W. Kenny, "Limits to Thermal-Piezoresistive Cooling in Silicon Micromechanical Resonators," Journal of Microelectromechanical Systems, Vol. 29, No. 5, pp. 677-684, Oct 2020.
Journal
Anne L. Alter, Ian B. Flader, Yunhan Chen, Lizmarie Comenencia Ortiz, Dongsuk D. Shin, and Thomas W. Kenny, "Characterization of Accelerated Fatigue in Thick Epi-Polysilicon Vacuum Encapsulated MEMS Resonators," Journal of Microelectromechanical Systems, pp. 1-10, 2020.
Journal
Anne L. Alter, Ian B. Flader, Yunhan Chen, Dongsuk D. Shin, and Thomas W. Kenny, "Nonlinear Dissipation in Epitaxial SCS and Polysilicon MEMS Driven at Large Amplitudes," Journal of Microelectromechanical Systems, pp. 1-3, 2020.
Journal
Xin Zhou, Chun Zhao, Dingbang Xiao, Jiangkun Sun, Guillermo Sobreviela, Dustin D. Gerrard, Yunhan Chen, Ian Flader, Thomas W. Kenny, Xuezhong Wu, and Ashwin Seshia, "Dynamic modulation of modal coupling inmicroelectromechanical gyroscopic ring resonators," Nature Communications, Vol. 10, No. 4980, pp. 1-9, Oct 2019.
Conference
Gabrielle D. Vukasin, Veronica K. Sanchez, Christopher P. Cameron, Hyun-Keun Kwon, Janna Rodriguez, Ian B. Flader, Yunhan Chen and Thomas W. Kenny, "EFFECT OF SUBSTRATE THICKNESS ON ANCHOR DAMPING IN MEMS DEVICES," Transducers 2019 - EUROSENSORS XXXIII, pp. 1843-1845, Jun 2019.
Conference
Saisneha Koppaka, Anne L. Alter, Gabrielle D. Vukasin, Dongsuk D. Shin, Ian B. Flader, Yunhan Chen, and Thomas W. Kenny, "NONLINEARITY OF DEGENERATELY DOPED FLEXURAL MODE SILICON MICROMECHANICAL RESONATORS," Transducers 2019 - EUROSENSORS XXXIII, pp. 1897-1900, Jun 2019.
Conference
Anne L. Alter, Gabrielle D. Vukasin, Ian B. Flader, Hyo Jin Kim, Yunhan Chen, Daniel D. Shin, and Thomas W. Kenny, "EXPERIMENTALLY OBSERVED NONLINEAR DISSIPATION LINKED TO CONTRIBUTIONS FROM GAS DAMPING AND TED IN MEMS FLEXURAL MODE RESONATORS," Transducers 2019 - EUROSENSORS XXXIII, pp. 2095-2098, Jun 2019.
Journal
Ian B. Flader, Yunhan Chen, Yushi Yang, Eldwin J. Ng, Dongsuk D. Shin, David B. Heinz, Lizmarie Comenencia Ortiz, Anne L. Alter, Woosung Park, Kenneth E. Goodson, and Thomas W. Kenny, "Micro-Tethering for Fabrication of Encapsulated Inertial Sensors With High Sensitivity," Journal of Microelectromechanical Systems, Vol. 28, No. 3, pp. 372-381, Jun 2019.
Journal
James M. Lehto Miller, Azadeh Ansari, David B. Heinz, Yunhan Chen, Ian B. Flader, Dongsuk D. Shin, L. Guillermo Villanueva, and Thomas W. Kenny, "Effective Quality Factor Tuning Mechanisms in Micromechanical Resonators," Applied Physics Reviews, Vol. 5, pp. 41307, Dec 2018.
Journal
James M. Lehto Miller, Haoshen Zhu, David B. Heinz, Yunhan Chen, Ian B. Flader, Dongsuk D. Shin, Joshua E.-Y. Lee, and Thomas W. Kenny, "Thermal-Piezoresistive Tuning of the Effective Quality Factor of a Micromechanical Resonator," Physical Review Applied, Vol. 10, No. 4, pp. 1-10, Oct 2018.
Conference
Eugene Cook, Michael Tomaino-Iannucci, Jonathan Bernstein, Marc Weinberg, Jennifer Choy, Karl Hobart, Lunet Luna, Marko Tadjer, Rachael Myers-Ward, Fritz Kub, Yushi Yang, Eldwin Ng, Ian Flader, Yunhan Chen, and Thomas Kenny, "A HIGH-MASS, EIGHT-FOLD SYMMETRIC SILICON CARBIDE MEMS GYROSCOPE," Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2018, pp. 364-365, Jun 2018.
Conference
James M. Lehto Miller, Azadeh Ansari, David B. Heinz, Yunhan Chen, Ian B. Flader, Dongsuk D. Shin, L. Guillermo Villanueva, and Thomas W. Kenny, "WHAT IS EFFECTIVE QUALITY FACTOR?," Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2018, pp. 240-241, Jun 2018.
Conference
Lizmarie Comenencia Ortiz, Dustin D. Gerrard, Ian B. Flader, Gabrielle D. Vukasin, David B. Heinz, Janna Rodriguez, Saisneha Koppaka, Dongsuk D. Shin, Hyun-Keun Kwon, Saurabh Chandorkar, and Thomas W. Kenny, "ENHANCING MICRO-OVEN POWER AND STIFFNESS IN ENCAPSULATED DEVICES FOR TIMING REFERENCE APPLICATIONS," Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2018, pp. 214-217, Jun 2018.
Conference
Anne L. Alter, Ian B. Flader, Yunhan Chen, Lizmarie Comenencia Ortiz, Dongsuk D. Shin, David B. Heinz, and Thomas W. Kenny, "FIRST FATIGUE MEASUREMENTS ON THICK EPI-POLYSILICON MEMS IN ULTRA-CLEAN ENVIRONMENT," Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2018, pp. 132-135, Jun 2018.
Journal
Lizmarie Comenencia Ortiz, David B. Heinz, Ian B. Flader, Anne L. Alter, Dongsuk D. Shin, Yunhan Chen, and Thomas W. Kenny, "Assessing failure in epitaxially encapsulated micro-scale sensors using micro and nano x-ray computed tomography," MRS Communications, pp. 1-8, Apr 2018.
Conference
Dongsuk D. Shin, Yunhan Chen, Ian B. Flader, and Thomas W. Kenny, "Temperature compensation of resonant accelerometer via nonlinear operation," 2018 IEEE 31st International Conference on Micro Electro Mechanical Systems (MEMS), pp. 1012-1015, Jan 2018.
Conference
Verena Maiwald, Ian B. Flader, Michelle Müller, Yunhan Chen, Silvan Plüss, Dongsuk D. Shin, Cosmin Roman, David B. Heinz, Thomas W. Kenny, and Christofer Hierold, "Experimental fractal-like instability bands in a resonant silicon-silicon contact pull-in vibration detector," 2018 IEEE 31st International Conference on Micro Electro Mechanical Systems (MEMS), pp. 984-987, Jan 2018.
Conference
Lizmarie Comenencia Ortiz, Ian B. Flader, Gabrielle D. Vukasin, Dustin D. Gerrard, Saurabh A. Chandorkar, Janna Rodriguez, Dongsuk D. Shin, Ryan Kwon, David B. Heinz, Yunhan Chen, Woosung Park, Kenneth E. Goodson, and Thomas W. Kenny, "Thermal effects of ovenized clocks on episeal encapsulated inertial measurement units," 2018 IEEE 31st International Conference on Micro Electro Mechanical Systems (MEMS), pp. 980-983, Jan 2018.
Conference
Janna Rodriguez, Dustin D. Gerrard, Grant M. Glaze, Saurabh Chandorkar, Yunhan Chen, Ian B. Flader, Dongsuk D. Shin, and Thomas W. Kenny, "Unanticipated results in the first direct measurements of anchor damping in MEMS resonators," 2018 IEEE 31st International Conference on Micro Electro Mechanical Systems (MEMS), pp. 543-546, Jan 2018.
Conference
Ian B. Flader, Yunhan Chen, Chae Hyuck Ahn, Dongsuk D. Shin, Anne L. Alter, Janna Rodriguez, and Thomas W. Kenny, "Epitaxial encapsulation of fully differential electrodes and large transduction gaps for MEMS resonant structures," 2018 IEEE 31st International Conference on Micro Electro Mechanical Systems (MEMS), pp. 483-486, Jan 2018.
Journal
Yunhan Chen, Ian B. Flader, Dongsuk D. Shin, Chae Hyuck Ahn, Janna Rodriguez, and Thomas W. Kenny, "Robust Method of Fabricating Epitaxially Encapsulated MEMS Devices with Large Gaps," Journal of Microelectromechanical Systems, Vol. 26, No. 6, pp. 1235-1243, Dec 2017.
Conference
J. Rodriguez, D.D. Gerrard, G.M. Glaze, S. Chandorkar, L. Comenecia, Y. Chen, I. B. Flader, T.W. Kenny, "Direct measurements of anchor damping in MEMS resonators," 2017 IEEE SENSORS, Vol. 1, pp. 1-3, Oct 2017.
Conference
V. Maiwald, Y. Chen, M. Muller, I. B. Flader, C. Roman, D. B. Heinz, D. D. Shin, T. W. Kenny, and C. Hierold, "Transfer function tuning of a broadband shoaling mechanical amplifier near the electrostatic instability," 2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), pp. 802-805, Jun 2017.
Conference
J. Rodriguez, D. D. Gerrard, S. Chandorkar, Y. Chen, G. M. Glaze, I. B. Flader, C. H. Ahn, E. J. Ng, and T. W. Kenny, "Wide-range temperature dependence studies for devices limited by thermoelastic dissipation and anchor damping," 2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), pp. 1100-1103, Jun 2017.
Conference
Dustin D. Gerrard, Yunhan Chen, Saurabh A. Chandorkar, Guo Yu, Janna Rodriguez, Ian B. Flader, Dongsuk D. Shin, Carl D. Meinhart, Ole Sigmund, and Thomas W. Kenny, "Topology optimization for reduction of thermo-elastic dissipation in MEMS resonators," 2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), pp. 794-797, Jun 2017.
Conference
Ian B. Flader, Yunhan Chen, Dustin D. Gerrard, and Thomas W. Kenny, "Wafer-scale encapsulation of fully differential electrodes for mutli-axis inertial sensing," 2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), pp. 591-594, Jun 2017.
Conference
Dongsuk D. Shin, Yunhan Chen, Ian B. Flader, and Thomas W. Kenny, "Epitaxially encapsulated resonant accelerometer with an on-chip micro-oven," 2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), pp. 595-598, Jun 2017.
Conference
David B. Heinz, Ian B. Flader, Yunhan Chen, Gabrielle D. Vukasin, Lizmarie Comenencia Ortiz, and Thomas W. Kenny, "Direct comparison of stiction properties of oxide coated polysilicon and smooth single crystal silicon," 2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), pp. 1203-1206, Jun 2017.
Conference
Soner Sonmezoglu, Ian B. Flader, Yunhan Chen, Dongsuk D. Shin, Thomas W. Kenny, and David A. Horsley, "Dual-resonator MEMS magnetic sensor with differential amplitude modulation," 2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), pp. 814-817, Jun 2017.
Conference
James M.L. Miller, David B. Heinz, Ian B. Flader, Yunhan Chen, Dongsuk D. Shin, and Thomas W. Kenny, "Effective quality factor and temperature dependence of self-oscillations in a thermal-piezoresistively pumped resonator," 2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), pp. 1907-1910, Jun 2017.
Conference
Yunhan Chen, Ian B. Flader, Dongsuk D. Shin, Chae Hyuck Ahn, Lizmarie Comenencia Ortiz, and Thomas W. Kenny, "Fabrication of wide and deep cavities for silicon MEMS devices without wafer bonding," 2017 IEEE International Symposium on Inertial Sensors and Systems (INERTIAL), pp. 113-116, Mar 2017.
Conference
Alexandra Efimovskaya, Yushi Yang, Eldwin Ng, Yunhan Chen, Ian Flader, Thomas W. Kenny, and Andrei M. Shkel, "Compact roll-pitch-yaw gyroscope implemented in wafer-level Epitaxial Silicon Encapsulation process," 2017 IEEE International Symposium on Inertial Sensors and Systems (INERTIAL), pp. 1-2, Mar 2017.
Conference
Soner Sonmezoglu, Ian B. Flader, Yunhan Chen, Dongsuk D. Shin, Thomas W. Kenny, and David A. Horsley, "Dual-resonator MEMS Lorentz force magnetometer based on differential frequency modulation," 2017 IEEE International Symposium on Inertial Sensors and Systems (INERTIAL), pp. 160-163, Mar 2017.
Conference
Yunhan Chen, Dongsuk D. Shin, Ian B. Flader, and Thomas W. Kenny, "Tri-mode operation of highly doped silicon resonators for temperature compensated timing references," 2017 IEEE 30th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 1158-1161, Jan 2017.
Conference
Alexandra Efimovskaya, Yu-Wei Lin, Yushi Yang, Eldwin Ng, Yunhan Chen, Ian Flader, Chae H. Ahn, Vu Hong, Thomas W. Kenny, and Andrei M. Shkel, "On cross-talk between gyroscopes integrated on a folded MEMS IMU Cube," 2017 IEEE 30th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 1142-1145, Jan 2017.
Conference
Dustin D. Gerrard, Janna Rodriguez, Lizmarie Comenencia Ortiz, Saurabh A. Chandorkar, Ian B. Flader, Yunhan Chen, Dongsuk D. Shin, and Thomas W. Kenny, "Manipulation of heat flux paths in thermo-elastically damped resonators for Q optimization," 2017 IEEE 30th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 1130-1133, Jan 2017.
Conference
Parsa Taheri-Tehrani, Martial Defoort, Yunhan Chen, Ian Flader, Dongsuk D. Shin, Thomas W. Kenny, and David A. Horsley, "Epitaxially-encapsulated quad mass resonator with shaped comb fingers for frequency tuning," 2017 IEEE 30th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 1111-1114, Jan 2017.
Conference
Dongsuk D. Shin, Chae Hyuck Ahn, Yunhan Chen, David L. Christensen, Ian B. Flader, and Thomas W. Kenny, "Environmentally robust differential resonant accelerometer in a wafer-scale encapsulation process," 2017 IEEE 30th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 17-20, Jan 2017.
Conference
Ian B. Flader, Yunhan Chen, Dongsuk D. Shin, David B. Heinz, Lizmarie Comenencia Ortiz, Anne L. Alter, Woosung Park, Kenneth E. Goodson, Thomas W. Kenny, "Micro-tethering for in-process stiction mitigation of highly compliant structures," 2017 IEEE 30th International Conference on Micro Electro Mechanical Systems (MEMS), Jan 2017.
Journal
Yushi Yang, Eldwin J. Ng, Pavel M. Polunin, Yunhan Chen, Ian B. Flader, Steven W. Shaw, Mark I. Dykman, and Thomas W. Kenny, "Nonlinearity of Degenerately Doped Bulk-Mode Silicon MEMS Resonators," Journal of Microelectromechanical Systems, Vol. 25, No. 5, pp. 859-869, Oct 2016.
Conference
Ian B. Flader, Chae H. Ahn, Dustin D. Gerrard, Eldwin J. Ng, Yushi Yang, Vu A. Hong, Marco Pavone, and Thomas W. Kenny, "Autonomous calibration of MEMS disk resonating gyroscope for improved sensor performance," 2016 American Control Conference (ACC), pp. 5803-5810, Jul 2016.
Conference
Ian B. Flader, Chae H. Ahn, Dustin D. Gerrard, Eldwin J. Ng, Yushi Yang, Vu A. Hong, Marco Pavone, and Thomas W. Kenny, "Autonomous calibration of MEMS disk resonating gyroscope for improved sensor performance," 2016 American Control Conference (ACC), pp. 5803-5810, Jul 2016.
Journal
Yushi Yang, Eldwin J. Ng, Yunhan Chen, Ian B. Flader, and Thomas W. Kenny, "A Unified Epi-Seal Process for Fabrication of High-Stability Microelectromechanical Devices," Journal of Microelectromechanical Systems, Vol. 25, No. 3, pp. 489-497, Jun 2016.
Conference
Ian B. Flader, Chae Hyuck Ahn, Eldwin J. Ng, Yushi Yang, Vu A. Hong, and Thomas W. Kenny, "Stochastic method for disk resonating gyroscope mode matching and quadrature nulling," 2016 IEEE 29th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 998-1001, Jan 2016.
Conference
Chae Hyuck Ahn, Dongsuk D. Shin, Vu A. Hong, Yushi Yang, Eldwin J. Ng, Yunhan Chen, Ian B. Flader, and Thomas W. Kenny, "Encapsulated disk resonator gyroscope with differential internal electrodes," 2016 IEEE 29th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 962-965, Jan 2016.
Conference
Yunhan Chen, Eldwin J. Ng, Dongsuk D. Shin, Chae H. Ahn, Yushi Yang, Ian B. Flader, Vu A. Hong, and Thomas W. Kenny, "Ovenized dual-mode clock (ODMC) based on highly doped single crystal silicon resonators," 2016 IEEE 29th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 91-94, Jan 2016.
Conference
Parsa Taheri-Tehrani, Mitchell Kline, Igor Izyumin, Burak Eminoglu, Yu-Ching Yeh, Yushi Yang, Yunhan Chen, Ian Flader, Eldwin J. Ng, Thomas W. Kenny, Bernhard E. Boser, and David A. Horsley, "Epitaxially-encapsulated quad mass gyroscope with nonlinearity compensation," 2016 IEEE 29th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 966-969, Jan 2016.
Conference
Vu A. Hong, David B. Heinz, David L. Christensen, Dongsuk D. Shin, Yunhan Chen, Chae Hyuck Ahn, Yushi Yang, Eldwin J. Ng, Ian B. Flader, and Thomas W. Kenny, "Overcoming stiction forces with resonant over-travel stops," 2016 IEEE 29th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 47-50, Jan 2016.
Conference
S. Wisher, P. Shao, A. Norouzpour-Shirazi, Y. Yang, E. Ng, I. Flader, Y. Chen, D. Heinz, T. Kenny, and F. Ayazi, "A high-frequency epitaxially encapsulated single-drive quad-mass tri-axial resonant tuning fork gyroscope," 2016 IEEE 29th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 930-933, Jan 2016.
Conference
Dustin D. Gerrard, Chae H. Ahn, Ian B. Flader, Yunhan Chen, Eldwin J. Ng, Yushi Yang, and Thomas W. Kenny, "Q-factor optimization in disk resonator gyroscopes via geometric parameterization," 2016 IEEE 29th International Conference on Micro Electro Mechanical Systems (MEMS), pp. 994-997, Jan 2016.
Conference
Ian B. Flader, Chae H. Ahn, Yushi Yang, Eldwin J. Ng, Vu A. Hong, Jeesu Baek, and Thomas W. Kenny, "Tunable quality factor through 1:1 modal coupling in a disk resonator," 2015 IEEE SENSORS, pp. 1-4, Nov 2015.
Conference
Yushi Yang, Eldwin J. Ng, Yunhan Chen, Ian B. Flader, Chae Hyuck Ahn, Vu A. Hong, and Thomas W. Kenny, "A unified epi-seal process for resonators and inertial sensors," 2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), pp. 1326-1329, Jun 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.
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
Yunhan Chen, Eldwin J. Ng, Yushi Yang, Chae Hyuck Ahn, Ian Flader, and Thomas W. Kenny, "In-situ ovenization of Lamé-mode silicon resonators for temperature compensation," 2015 28th IEEE International Conference on Micro Electro Mechanical Systems (MEMS), pp. 809-812, Jan 2015.