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MicroSensors and MicroActuators

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Yoon Su Choi (PhD student)

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Biographical Sketch

Yoonsu Choi received the BS, MS in Electronics Engineering from Soongsil University in 1993 and 1995, respectively. During 1995-1999, he worked at Korea Telecom Research Center, Seoul, Korea. He is currently working towards a Ph.D. in Electrical Engineering at Georgia Institute of Technology.

Personal Website: MEMS Street (http://www.biomems.st)

Office: 404-894-9905

Fax: 404-894-5028

Cell: 404-455-1945

gte810q@mail.gatech.edu

yoonsu@go.com

Current Project:

A 3-D Microfluidic/electronic Neural Interface System: In Vitro Studies of Neural Networks, Plasticity, and Injury

Published Papers:

[1] Yoonsu Choi, R. Powers, V. Vernekar, A. B. Frazier, M. LaPlaca, and M.G. Allen, " High Aspect Ratio SU-8 Structures for 3-D Culturing of Neurons," Proceedings of ASME International Mechanical Engineering Congress and Exposition, Nov. 2003.

[2] Yoonsu Choi, J. Ross, S. DeWeerth, and M.G. Allen, " Mechanically Driven Microtweezers," Proceedings of ASME International Mechanical Engineering Congress and Exposition, Nov. 2003.

[3] Yoonsu Choi, R. Powers, Y. Yoon, M. G. Allen, “A Three-Dimensional Microfluidic Network for Cellular Perfusion,” The 7^th International Conference on Miniaturized Chemical and BioChemical Analysis Systems (MicroTAS2003), Oct. 2003.

[4] J. Ross, G. Prado, Yoonsu Choi, M. G. Allen, M. LaPlaca, S. DeWeerth, “A Novel System for Measurement of Electrophysiological Signals Associated with Traumatic Neuronal Injury,” The 7^th International Conference on Miniaturized Chemical and BioChemical Analysis Systems (MicroTAS2003), Oct. 2003.

[5] D. Kim, Yoonsu Choi, M. Ahn, M. G. Allen, J. S. Kenney, and P. Marry, “2.4 GHz continuously variable ferroelectric phase shifters using all-pass networks,” IEEE Microwave and Wireless Components Lett. vol. 13, Oct. 2003

[6] Y. Yoon, R. Powers, Yoonsu Choi, C. Courcimault, and M.G. Allen, “Micromachined Polymeric Microvasculatures: A Three-Dimensional Microfluidic System Using Inclined SU-8 Structures and Laser Machining,” 226th American Chemical Society National Meeting, Sep. 2003.

[7] H. Noh, Yoonsu Choi, C. Wu, P. J. Hesketh, M. G. Allen, “Rapid, Low-Cost Fabrication of Parylene Microchannels for Microfluidic Applications,” The 12^th International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers03), June, 2003.

[8] D. Kim, Yoonsu Choi, M. Ahn, M. G. Allen, and J. S. Kenney, “Monolithic 180° and 360° analog phase shifters based on barium-strontium-titanate coated substrate,” IEICE Trans. Electronics Aug. 2003.

[9] D. Kim, Yoonsu Choi, M. G. Allen, J. S. Kenney, and D. Kiesling, “A wide-band reflection-type phase shifter at S-band using BST coated substrate,” IEEE Trans. Microwave Theory Tech., vol. 50, No. 12, pp. 2903-2909, Dec. 2002.

[10] D. Kim, Yoonsu Choi, M. Ahn, M. G. Allen, and J. S. Kenney, “S-band ferroelectric phase shifters with continuous 180° and 360° phase shift range,” IEEE Asian-Pacific Microwave Conf., vol. 3, pp. 1581-1584, 2002.

[11] D. Kim, Yoonsu Choi, M. G. Allen, J. S. Kenney, and D. Kiesling, “A wide bandwidth monolithic BST reflection-type phase shifter using a coplanar waveguide Lange coupler,” Microwave Symposium Digest, 2002 IEEE MTT-S International, vol. 3, pp.1471-1474, June 2002.

[12] D. Kim, Yoonsu Choi, M. G. Allen, J. S. Kenney, D. W. Stollberg, and D. Kiesling, “An S-band reflection-type phase shifter-A design example using ferroelectrics,” MRS 2002 spring meeting proceedings, vol. 720, April 2002.

[13] Yoonsu Choi, K. Kim, and M.G. Allen, "Continuously-Varying, Three-Dimensional SU-8 Structures: Fabrication of Inclined Magnetic Actuators," Proceedings of the IEEE Microelectromechanical System Conference, Jan. 2002.

[14] Yoonsu Choi, K. Kim, and M.G. Allen, "A Magnetically Actuated, Electrostatically Clamped High Current MEMS Switch," Proceedings of ASME International Mechanical Engineering Congress and Exposition, Nov. 2001.

[15] Yoonsu Choi, J. Song, S. Chung, and J. Yoon, "An Implementation of CAMA Integrating Several Types of Switches," Proceedings of International Conference on Advanced Communication Technology (ICACT’99), Feb. 1999.

[16] Yoonsu Choi, D. Kim, S. Chung, and M. Lee, "Implementation of CAMA System for M10CN Switch," Journal of The Korea Institute of Telematics and Electronics, Vol. 35, No. 4, April 1998.

[17] Yoonsu Choi, S. Lee, J. Yoon, and M. Lee, "An Implementation of KT-CAMA system for Switches without bulit-in cama function," Proceedings of The Third Asia-Pacific Conference on Communications (APCC'97), Dec. 7, 1997.

[18] Yoonsu Choi, and K. Chung, "An Efficient Model Generation for Model-based PCB Pattern Inspection," Journal of The Korea Information Science Society, Vol. 24, No. 7, July 1997

[19] Yoonsu Choi, J. Song, J. Yoon, and M. Lee, "Implementation of CAMA System for No.1A Switch," Proceedings of The Korea Institute of Telematics and Electronics Summer Conference, Vol. 20, No. 1, June 1997.

[20] Yoonsu Choi, J. Song, J. Yoon, and M. Lee, "A study on confidence of KT-CAMA system," Korea Telecom Technical Review, Vol. 11, No. 2, June 1997.

[21] Yoonsu Choi, and S. Jung, "Development of the Extraction Device collecting charges from Switches for KT-CAMA system," The 7th Joint Conference on Communications & Informations (JCCI'97) Vol. 7, No. 1, April 1997.

[22] W. H. Lee, Yoonsu Choi, J. R. Kim, and K. Chung, "Generation of Reference Model for PCB Pattern Inspection from Gerber CAD data," Journal of The Korea Information Science Society, Vol. 23, No. 1, Jan. 1996

[23] Yoonsu Choi, and K. Chung, "An Efficient PCB pattern Inspection Using outline Tracing," Proceedings of The Korea Institute of Telematics and Electronics Summer Conference, Vol. 18, No. 1, June 1995.

[24] Yoonsu Choi, and K. Chung, "An Efficient PCB pattern Inspection based Model-Matching," Proceedings of The Seventh Workshop for Image processing and understanding, The Korea Information Science Society Vol. 7, No. 1, May 1994.