Jae Yoong Cho - Electrical Engineering and Computer Science

Jae Yoong Cho
Research Fellow
Department of Electrical Engineering and Computer Science
University of Michigan
2411 EECS Building, Ann Arbor, MI 48109
Email: [email protected]
Tel: 734-763-7162, Fax: 734-763-9324
www.eecs.umich.edu/~jycho
Education
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Ph.D. in Electrical Engineering, University of Michigan, Ann Arbor, MI, Feb 2012.
- Thesis Title: “High-Performance Micromachined Vibratory Rate- and RateIntegrating Gyroscopes”.
- Thesis Committee: Khalil Najafi (Chair), Yogesh Gianchandani, Noel C. Perkins,
and Sang Woo Lee.
M.S. in Electrical Engineering, University of Michigan, Ann Arbor, MI, June 2007.
B.S.E. in Electrical Engineering and Material Science and Engineering, University of
Michigan, Ann Arbor, MI, June 2004.
Employment
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Mar. 2012 – Present: Postdoctoral Research Fellow, Dept. of Electrical Engineering and
Computer Science and Center for Wireless Integrated MicroSensing and Systems
(WIMS2), University of Michigan, Ann Arbor, MI
- Micro Rate-Integrating Gyroscope (MRIG): As a project administrator, I lead the
team developing novel fused silica rate-integrating gyroscope architecture,
microfabrication technologies, and high-performance gyro control algorithms.
Funding provided by DARPA Micro-PNT Program.
- Single-Chip Time and Inertial Measurement Unit (TIMU): I contribute to the
development of novel extremely miniaturized fused silica timing and inertial sensor
architecture and microfabration process. Funding provided by DARPA Micro-PNT
Program.
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Sep. 2004 – Feb. 2012: Graduate Student Research Assistant, Dept. of Electrical
Engineering and Computer Science and the Center for Wireless Integrated MicroSystems
(WIMS), University of Michigan, Ann Arbor, MI.
- Developed the architecture, fabrication technology, and readout-and-control circuitry
for the Cylindrical Rate-Integrating Gyroscope (CING) and Balanced Oscillating
Gyroscope (BOG).
- Contributed to the fabrication of environment-resistant MEMS package for a DARPA
Harsh Environment Robust Micromechanical Technology (HERMIT) project.
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May – Aug. 2004: Research Assistant, Tabata Research Group, Dept. of Mechanical
Engineering, Kyoto University, Kyoto, Japan.
- Studied self-assembly of polymer beads for the fabrication of nanostructures.
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June – July 2004: Intern, KRI, Inc, Kyoto, Japan.
- Assembled polymer microfludic chips for blood analysis.
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June – July 2004: Undergraduate Research Assistant, Goldman Research Group, Dept. of
Material Science and Engineering, University of Michigan, Ann Arbor, MI.
- Evaluated GaAs semiconductor properties.
Honors and Awards
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Outstanding Leadership Award (2008): Peer-voted award at the Center for Wireless
Integrated Microsystems (WIMS), University of Michigan for mentoring support, assisting
others, and excellent laboratory skills.
Beakyop Scholarship (2004): Awarded by Geongsangnam-Do province, Rep. of Korea.
Senior Scholars Award (2003): Awarded by Department of Electrical Engineering and
Computer Science, University of Michigan.
Jack Heller Memorial Engineering Scholarship (2002-2003): Awarded by Department of
Material Science and Engineering, University of Michigan.
Leadership Experience
• WIMS Student Leadership Council, Industrial Relations Chair (2006-2007): Participated in
K-12 outreach activities. Edited resume books for Industrial Advisory Board (IAB) Meeting
and interacted with WIMS industrial partners.
Refereed Journal Publications
[1] J. Cho, J. Yan, J. A. Gregory, H. Eberhart, R. L. Peterson, and K. Najafi, “3-Dimensional
Blow Torch-Molding of Fused Silica Microstructures,” IEEE Journal of
Microelectromechanical Systems, vol. 22, no. 6, Dec. 2013, pp. 1276-1284.
[2] J. Cho, J.-K. Woo, J. Yan, R. L. Peterson, and K. Najafi, “Fused-Silica Micro Birdbath
Resonator Gyroscope (µ-BRG),” IEEE Journal of Microelectromechanical Systems., vol. 23,
no. 1, Feb. 2014, pp. 66-77.
Refereed Conference Publications
[1] S. Lee, J. Cho, and K. Najafi, "Fabrication of Vertical Comb Electrodes Using Selective
Anodic Bonding," in Proc. 20th IEEE International Conference on Micro Electro
Mechanical Systems (MEMS’07), Kobe, Japan, January 2007, pp. 349-352.
[2] S.-H. Lee, J. Cho, S. W. Lee, M. F. Zaman, F. Ayazi, and K. Najafi, "A Low-Power OvenControlled Vacuum Package Technology for High-Performance MEMS”, in Proc. 22th IEEE
International Conference on Micro Electro Mechanical Systems (MEMS’09), Sorrento, Italy,
January 2009, pp.753-756.
[3] J. Cho, J. A. Gregory, K. Najafi, "Single-Crystal-Silicon Vibratory Cylindrical Rate
Integrating Gyroscope (CING)," in Proc. 16th IEEE International Conference on Solid-State
Sensors, Actuators, and Microsystems (TRANSDUCERS’11), Beijing, China, June 2011, pp.
2813-2816.
[4] J. A. Gregory, J. Cho, K. Najafi, “MEMS Rate and Rate-Integrating Gyroscope Control with
Commercial Software Defined Radio Hardware,” in Proc. 16th IEEE International
Conference on Solid-State Sensors, Actuators, and Microsystems (TRANSDUCERS’11),
Beijing, China, June 2011, pp. 2394-2397.
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[5] J. Cho, J. A. Gregory, and K. Najafi, "High-Q, 3KHz Single-Crystal-Silicon Cylindrical
Rate-integrating Gyro (CING)," in Proc. 25th IEEE International Conference on Micro
Electro Mechanical Systems (MEMS’12), Paris, France, January 2012, pp. 172-175.
[6] J. A. Gregory, J. Cho, and K. Najafi, “Characterization and Control of a High-Q MEMS
Inertial Sensor using Low-Cost Hardware”, in Proc. IEEE/ION Position Location and
Navigation Symposium (PLANS 2012), Myrtle Beach, SC, May 2012, pp. 239-247.
[7] J. A. Gregory, J. Cho, and K. Najafi, “Novel Mismatch Compensation Methods for RateIntegrating Gyroscopes”, in Proc. IEEE/ION Position Location and Navigation Symposium
(PLANS 2012), Myrtle Beach, SC, May 2012, pp. 252-258.
[8] J. Cho, J. Yan, J. A. Gregory, H. Eberhart, R. L. Peterson, and K. Najafi, “High-Q Fused
Silica Birdbath and Hemispherical 3-D Resonators Made by Blow Torch Molding,” in Proc.
26th IEEE International Conference on Micro Electro Mechanical Systems (MEMS’13),
Taipei, Taiwan, January 2013, pp. 177-180.
[9] J. Cho, J.-K. Woo, J. Yan, R. L. Peterson, and K. Najafi, “A High-Q Birdbath Resonator
Gyroscope (BRG),” in Proc. 17th IEEE International Conference on Solid-State Sensors,
Actuators and Microsystems (TRANSDUCERS’13), Barcelona, Spain, June 2013, pp. 18471850.
[10] J.-K. Woo, J. Cho, C. Boyd, and K. Najafi, “Whole-Angle-Mode Micromachined FusedSilica Birdbath Resonator Gyroscope (WA-BRG),” accepted for oral presentation in Proc.
27th IEEE International Conference on Micro Electro Mechanical Systems (MEMS’14), San
Francisco, USA, January 2014.
[11] J. Cho, T. Nagourney, A. Darvishian, B. Shiari, J.-K. Woo, and K. Najafi, "Fused Silica
Micro Birdbath Shell Resonators With 1.2 Million Q and 43 Second Decay Time Constant,"
Accepted by 2014 Hilton Head Solid State Sensors, Actuators, and Microsytems Workshop,
Hilton Head Island, SC, June 2014.
[12] J. Cho, J-K. Woo, T. Nagourney, A. Darvishian, B. Shiari, C. Boyd, and K. Najafi,
"Development of Fused-Silica Micro Birdbath Resonator Gyroscope," Accepted as
Alternative in Institute of Navigation (ION) Joint Navigation Conference 2014, Orlando, FL,
June 2014.
Refereed Conference Presentations
[1] J. Cho, "Single-Crystal-Silicon Vibratory Cylindrical Rate Integrating Gyroscope (CING),"
in IEEE International Conference on Solid-State Sensors, Actuators, and Microsystems
(TRANSDUCERS’11), Beijing, China, June 2011.
[2] J. Cho, "High-Q, 3KHz Single-Crystal-Silicon Cylindrical Rate-integrating Gyro (CING)," in
25th IEEE International Conference on Micro Electro Mechanical Systems (MEMS’12),
Paris, France, January 2012.
[3] (Invited) J. Cho, “DRIE of Single-Crystal-Si for MEMS Inertial Sensors”, in Lurie
Nanofabrication Facility (LNF) DRIE Workshop, Ann Arbor, MI, February 2012.
[4] J. Cho, “High-Q Fused Silica Birdbath and Hemispherical 3-D Resonators Made by Blow
Torch Molding,” in 26th IEEE International Conference on Micro Electro Mechanical
Systems (MEMS’13), Taipei, Taiwan, January 2013.
[5] J. Cho, T. Nagourney, A. Darvishian, B. Shiari, J.-K. Woo, and K. Najafi, "Fused Silica
Micro Birdbath Shell Resonators With 1.2 Million Q and 43 Second Decay Time Constant,"
Accepted by 2014 Hilton Head Solid State Sensors, Actuators, and Microsytems Workshop,
Hilton Head Island, SC, June 2014.
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[6] J. Cho, J-K. Woo, T. Nagourney, A. Darvishian, B. Shiari, C. Boyd, and K. Najafi,
"Development of Fused-Silica Micro Birdbath Resonator Gyroscope," Accepted as
Alternative in Institute of Navigation (ION) Joint Navigation Conference 2014, Orlando, FL,
June 2014.
Non-Refereed Conference/Seminar Presentations
[1] (Invited) J. Cho, “DRIE of Single-Crystal-Si for MEMS Inertial Sensors”, in Lurie
Nanofabrication Facility (LNF) DRIE Workshop, Ann Arbor, MI, February 2012.
Patents
[1] K. Najafi and J. Cho, "Gyroscope and Method of Fabricating a Resonator for a Gyroscope,”
US Patent Application No. 13/481,650, May 25, 2012.
[2] K. Najafi, R. L. Peterson, J. Cho, Z. Cao, G. He, J. A. Gregory, and Y. Yuan, “Microsystem
Device and Methods for Fabricating the Same,” US Patent Application No. 13/665,163, Oct
31, 2012.
Contributed Funding Proposals
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Micro Rate-Integrating Gyroscope (MRIG) Program (funded), DARPA MTO, May 2010.
- Co-invention of fused silica micro shell rate-integrating gyroscope architecture,
named the micro birdbath resonator gyroscope, as well as its microfabrication
process.
Single Chip Timing and Inertial Measurement Unit (TIMU) TIMU (funded), DARPA MTO,
February 2011.
- Co-invention of extremely miniaturized micro fused silica timing and inertial
measurement unit (TIMU) architecture as well as its microfabrication process.
Primary and Secondary Calibration Active Layer (PASCAL) (funded), DARPA MTO, June
2011.
Teaching Interests
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Microsystem Design
Introduction to Microelectromechancial Systems
Integrated Microsystems Laboratory
Analog Electronic Circuits
Professional Associations
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IEEE (SM’07, M’12)
Alpha Sigma Mu, Honor Society of dept. of Material Science and Engineering, Student
Member (since 2003).
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