Category of Study: MEMS

Office: Room 313, Essex Hall

Emai:  sazzadur@uwindsor.ca

Telephone:  (519) 253-3000 extension 4794

Fax:  (519) 971-3695

Education:
Ph.D., 2003, University of Windsor

Professional Designation:
• P. Eng., Professional Engineers Ontario (PEO)
• Member, Institute of Electrical and Electronics Engineers (IEEE)
• Member, IEEE Electron Devices Society

Fields of Interest:
• Capacitive micromachined ultrasonic transducers (CMUT)
• Planar and non-planar beamforming beamsteering CMUT arrays
• MEMS short range, long range, and ultrawideband (UWB) radar
• Sonoluminescence based MEMS transducer
• MEMS electrostatic sensors and actuators
• MEMS multi-spectral (ultrasonic and microwave) transducer array
• 3-D packaging and integration of diverse origin technologies
• MEMS micropower generator

Application Areas:
• High resolution 3-D and 4-D medical diagnostic imaging
• Automotive collision avoidance
• Automotive pre-crash warning and mitigation of collision damage
• Material characterization
• Biometric based identification and security
• Cardiac pacemakers

Research Sponsors:
• Natural Sciences and Engineering Research Council (NSERC) of Canada
• CMC Microsystems
• Ontario Centres of Excellence (OCE)
• Auto21
• Micronet Canada
• IntelliSense Software Inc.

Research Affliliations:
• Research Centre for Integrated Microsystems (RCIM)
• Department of Physics
• Institute of Diagnostic Imaging Research (IDIR), Windsor

Courses:
1. Physical Electronics: 88-225
2. Automotive Electronics: 88-434
3. Microelectromechanical Systems (MEMS): 88-435
4. Advanced Topics in MEMS: 88-552

Awards and Honours:
1. Received University of Windsor Award for Excellence in Scholarship, Research and Creative Activity, 2008, 2007, and 2005.
2. Received Ontario Graduate Scholarship for Science and Technology (OGSST) (2000-2003).
3. Received the 2001 Strategic Microelectronics Consortium Industrial Collaboration Award at the Annual Symposium on Microelectronics Research & Development in Canada (MR&DCAN2001) organized by CMC Microsystems.
4. Received the “MICRONET Best Paper Award” in national design competitions in Ottawa for the years 2000 and 2001.
5. University of Windsor Member Representative to the Canadian Microelectronics Corporation (CMC Microsystems) for the period 2004-2010.
 

PUBLICATIONS:

Journals:
1. M. Rahman, S. Chowdhury, “A Highly Accurate Closed-Form Model for Pull-in Voltage of Electrostatically Actuated Circular Diaphragms Subject to Large Deflection”, Journal of Micro and Nanosystems, published, vol. 1, no. 2, pp. 139-146, July, 2009.
2. L. Ghosh, S. Chowdhury, “A Highly Accurate Pull-in Voltage Model for an Atomic Force Microscope Probe”, IEEE Sensor's Journal, 2009.
3. A. Tam, S. Chowdhury, “Exploiting Sonoluminescence to Realize a MEMS Ultrasonic Sensor”, Journal of Circuits, Systems, and Computers, vol. 17, no. 2, April 2008, pp. 309-332
4. M. Meloche, S. Chowdhury, “Design of a MEMS Discretized Hyperbolic Paraboloid Geometry Ultrasonic Sensor Microarray”, IEEE Trans. on Ultrasonics, Ferro-electrics, and Frequency Control, vol. 55, no. 6, June, 2008, pp. 1362-1372.
5. S. Chowdhury, M. Ahmadi, W. C. Miller, “Pull-in Voltage Study of Electrostatically Actuated Fixed-Fixed Beams Using a VLSI On-Chip Interconnect Capacitance Model”, IEEE/ASME J. of Microelectromechanical Systems, vol. 15, no. 3, pp. 639-651, June, 2006.
6. S. Chowdhury, M. Ahmadi, W. C. Miller, “A Closed-Form Model for the Pull-in Voltage of Electrostatically Actuated Cantilever Beams”, Journal of Micromechanics and Microengineering, vol. 15, no. 4, pp. 756-763, April, 2005.
7. S. Chowdhury, M. Ahmadi, W. C. Miller, “A New Analytical Model for the Pull-in Voltage of Clamped Diaphragms Subject to Electrostatic Force”, Sensor Letters Journal, vol. 2, no.2, pp. 106-112, June,2004.
8. S. Chowdhury, M. Ahmadi, W. C. Miller, “Microelectromechanical Systems and System-on-Chip Connectivity”, IEEE Circuits and Systems Magazine, vol. 2, no.2 2, pp. 4-28, May, 2002.
9. S. Chowdhury, Majid Ahmadi, W. C. Miller, “Design of a MEMS Acoustical Beamforming Sensor Microarray”, IEEE Sensors Journal, vol. 2, no. 6, pp. 617-627, Dec. 2002.

Refereed Conference Proceedings:
1. M Rahman, S. Chowdhury, “Analysis of a MEMS-Based Ring–Disc Electrode System for Stabilization of Microbubbles in Aqueous Solution Using Dielectrophoretic Force”, in Proc. of 3rd International Joint Conference on Advanced Materials and Design,(ISDT2009), May 11-14, 2009, pp. 1-6.
2. A. Sinjari, S. Chowdhury, “A Single-Pole-Triple-Throw (SP3T)MEMS RF Switch for 24 GHz Short Range Radar”, in Proc. of IEEE EIT2009, June 7-9, 2009, Windsor, ON, pp. 182-185.
3. M. Rahman, S. Chowdhury, “A Highly Accurate Method to Calculate Capacitance of MEMS Sensors with Circular Membranes”, in Proc. of EIT2009, June 7-9, 2009, Windsor, ON, pp. 178-181.
4. A. Sinjari, S. Chowdhury, “High Performance 77 GHz Single Pole Triple Throw (SP3T) MEMS Switch”, in Proc. of IEEE NEWCAS-TAISA’09, June 28-July 1, 2009, Toulouse, France, pp-1-4.
5. M. Rahman, S. Chowdhury, “A Simple Capacitance Calculation Formula for MEMS Capacitive Sensors with Square Diaphragms”, in Proc. of IEEE NEWCAS-TAISA’09, June 28-July 1, 2009, Toulouse, France, pp. 1-4.
6. L. Ghosh, S. Chowdhury, “Electrostatic Energy Characterization for an Atomic Force Microscope Probe”, in Proc of IEEE CMC MNRC 2008, Ottawa, vol. 1, pp. 1-4.
7. J. Martinez-Quijada, S. Chowdhury, “A Two-Stator MEMS Power Generator for Cardiac Pacemakers”, in Proc. of IEEE ISCAS2008, Seattle, vol. 1, 2008, pp.161-164.
8. A. Sinjari, S. Chowdhury, “Design of a PZT-based MEMS Rotman Lens”, in Proc. of CCECE 2008., Niagara Falls, ON, vol. 1, 2008, pp. 001121 – 001124.
9. A. Sinjari, S. Chowdhury, “MEMS Automotive Collision Avoidance Radar Beamformer”, Proc. of IEEE ISCAS2008, Seattle, vol. 1, 2008, pp. 2086-2089,.
10. M. Meloche, S. Chowdhury, “An Integrated Active Vehicle Safety System (IAVSS) To Improve Vehicle Dynamic Safety”, in Proc. of XVII Canadian Multidisciplinary Road Safety Conference (CMRSC2007), Montreal, vol. 1, 2007, pp. 1-15.
11. A. Tam, S. Chowdhury, “A MEMS Ultra-Stable Short Duration Current Pulse Generator”, in Proc. of IEEE Computer Society Annual Symposium on VLSI (ISVLSI2007), Porto Alegre, Brazil, vol. 1, pp. 369-374.
12. J. Martinez-Quijada, S. Chowdhury, "Body-Motion Driven MEMS Generator for Implantable Biomedical Devices”, in Proc. of CCECE2007, Vancouver, April 2007, pp. 164-167.
13. M. Meloche, S. Chowdhury, “A MEMS Non-Planar Constant Beamwidth Ultrasonic Sensor Microarray”, in Proc. of IEEE-NEWCAS 2006, Gatineau, Canada, vol. 1, pp. 273-276, June, 2006.
14. A. Tam, S. Chowdhury, “A MEMS Sonoluminescent Ultrasonic Sensor”, in Proc. of IEEE EIT2006, Lansing, Michigan, vol. 1, May, 2006, pp. 508-511.
15. S. Chowdhury, M. Ahmadi, W. C. Miller, “A Comparison of Pull-in Voltage Calculation Methods for MEMS-Based Electrostatic Actuator Design”, in Proc. of ICST2005, Palmerston, New Zealand, vol. 1, Nov. 2005, pp. 112-117.
16. S. Chowdhury, M. Ahmadi, W. C. Miller, “A New Method of Electrostatic Force Modeling for MEMS Sensors and Actuators” in Proc. of ICMENS2005, Banff, Alberta, 2005, vol. 1, pp. 431-435.
17. S. Chowdhury, M. Ahmadi, W. C. Miller, “Pull-in Voltage Calculations for MEMS Sensors with Cantilevered Beams”, in Proc. of NEWCAS2005, Quebec City, Canada, vol. 1, 2005, pp. 143-146.
18. S. Chowdhury, M. Ahmadi, W. C. Miller, “The Concept of a 3-D Cubic Acoustical Sensor Microarray Cluster for Use in a Hearing Instrument”, in Proc. of ICMENS2004, Banff, Alberta, vol. 1. 2004, pp. 160-164.
19. S. Chowdhury, M. Ahmadi, W. C. Miller, “Electrical Connectivity Analysis of a MEMS Micropackage”, in Proc. of IEEE ISCAS2004, Vancouver, vol. 4, 2004, pp. 916-919.
20. S. Chowdhury, M. Ahmadi, W. C. Miller, “Nonlinear Effects in MEMS Capacitive Microphone Design”, in Proc. of ICMENS2003, Banff, Alberta, 20-23 July, 2003, pp. 297-302, (Source of funding: NSERC, CMC, Gennum, Micronet, IntelliSense Inc. USA).
21. S. Chowdhury, M. Ahmadi, W. C. Miller, “A MEMS Custom Micropackaging Solution”, in Proc. of IEEE ISCAS2003, vol. 3, Bangkok, 25-28 May, 2003, pp. 938-941.
22. S. Chowdhury, M. Ahmadi, G. A. Jullien, W. C. Miller, “A MEMS Socket System For High Density SoC Interconnection”, in Proc. of the 2002 IEEE International Symposium on Circuits and Systems (ISCAS2002), Scottsdale, Arizona, 2002, vol. 1, pp. 657-660.
23. S. Chowdhury, M. Ahmadi, G. A. Jullien, W. C. Miller, “A MEMS Implementation of an Acoustical Sensor Array”, in Proceedings of the 2001 IEEE International Symposium on Circuits and Systems (ISCAS2001), 2001, Sydney, Australia, Vol. 2, pp. 273-276.
24. S. Chowdhury, M. Ahmadi, G. A. Jullien, W. C. Miller, “A Modular MEMS Electromagnetic Actuator for Use in a Hearing Instrument”, in Proceedings of the 43rd IEEE Midwest Symposium on Circuits and Systems, Lansing, Michigan, 2000, Vol.1, pp. 240 –243.
25. S. Chowdhury, G. A. Jullien, M. Ahmadi, W. C. Miller, “A MEMS Micromagnetic Actuator for use in a Bionic Interface”, in Proceedings of the 2000 IEEE International Symposium on Circuits and Systems (ISCAS2000), Geneva, Switzerland, 2000, Vol.5, pp. 181 -184.
26. S. Chowdhury, G. A. Jullien, M. Ahmadi, W. C. Miller, D. Keating, and N. Finch, "Acoustic and magnetic MEMS components for a hearing aid instrument”, in Proceedings of SPIE on International Symposium on Design, Test, Integration, and Packaging of MEMS/MOEMS, May 9-12, 2000, Paris, France, 2000, Vol. 4019, pp.122-133.
27. S. Chowdhury, J. J. Soltis, W. C. Miller, “Interpolation using Elliptic Sine Function: A Digital Signal Processing Approach”, in Proceedings of the 1999 IEEE Canadian Conference of Electrical and Computer Engineering (CCECE’99), Edmonton, Alberta, 1999. Vol. 2, pp. 714 –719.

Special Presentations (Recent):
1. S. Chowdhury, “MEMS-Based Intelligent Active Safety Systems”, APMA-AUTO21 2009 Conference, Hamilton, ON, May26-28, 2009.
2. Sinjari, S. Abbas, S. Chowdhury, “MEMS Sensors for Automotive Collision Avoidance”, OCE Discovery 2008, May 12-13, 2008, Toronto.
3. Sinjari, S. Abbas, R. Muscedere, M. Ahmadi, S. Chowdhury, “MEMS Sensors for an Integrated Active vehicle Safety System (IAVSS)”, North American International Autoshow (NAIAS), 2008, NAIAS, Detroit, January, 2008.
4. J. Martinez-Quijada, S. Chowdhury, “A MEMS Micropower Generator for Implantable Medical Devices”, The CMC Microsystems 2006 Annual Symposium, October, 2006, Ottawa.
5. M. Meloche, M. Ahmadi, W. C. Miller, S. Chowdhury, “A MEMS Tiered Topology Beamforming Ultrasonic Microarray”, CMC Microsystems’s 2005 Annual Symposium, 2006, Ottawa.