• Senior Research Engineer:  PowerMEMS Technologies, Inc. (2/06 – present)

  Visiting Scientist:  UCLA (3/06 – present)
     - Development of Micro Thermo-Mechanical Energy Harvesting Device

  Staff Research Engineer: University of California at Los Angeles, Mechanical and Aerospace Dept, Advisor: Greg P. Carman  (6/03 – 2/06)

  -Development of Piezoelectric Micro Energy Harvesting Device using Frequency Rectification, PowerMEMS
  -Development/characterization of actuators for control of thin film membranes to optical requirements, AIRFORCE
  -Electro-optic polymer modulator & SOI Ridge Waveguides, Consultant.
  -Development of Microvalves for SMA Compact Actuator, DARPA/CHAP
  -Large Scale Panel Testing of embedded Optical Smart Sensors in Advanced Composites for Structural Health Monitoring, NASA/Dryden

  Postdoctoral Researcher Fellow: UCLA, MAE Dept, Prof. G. P. Carman (5/99–5/03)

  - Development of Piezoelectric pump with novel MEMS valves, Pizokinetics/DARPA
  - Development of Thin Film Shape Memory Alloys compact actuator for kinetic energy missile, Hughes/DARPA
  - Investigating the Damping Properties of Magnetostrictive composites,
  - Embedded Optical Sensor research with application to flight, NASA/Dryden
  - Fatigue assessment methodology for sandwich panels, ONR

  Postdoctoral Researcher: Korea Institute of Science and Technology (KIST), CAD/CAM Research Center, Korea, Advisor: Dr. J. H. Cha (9/98 – 4/ 99)

  -Development of Intelligent Design System for Embodiment Design of Machine Tools

  Graduate Student Researcher: Hanyang University, Mechanical Dept., Seoul, Korea, Advisor: Prof. S. K. Ha (2/92 - 8/98)

  • Optimum Design of Filament Wound Composite Structure
  • Hybrid Composite Flywheel Rotor for an Energy Storage System
  • Composite Pressure Vessel
  • Design and Development of Manufacturing of Composite Flywheel Rotor with High Angular Velocity
  • Design of CNG Vessel layered with Aluminum and Composites
  • Analysis of Valve for Nuclear Generator

Teaching Assistant, Basic Mechanical Engineering Laboratory, Hanyang Univ., South Korea (3/94 – 2/96).

Hand-on MEMS(MicroElectroMechanical System) Fabrication Techniques: (+3yrs)

-LPCVD Polysilicon/Oxide Deposition,  STS PECVD Oxide Deposition
-Metallization (E-Beam Evaporation, NiTi Sputtering)
-Dry-etching (Fluorine RIE, Oxford RIE, Deep RIE, AOE), Wet-etching (KOH, HF)
-Characterization (SEM, nanospec, Dektak 6 profilometer, Wyko NT 3300 profiler)
-Lithography (Karl Suss mask aligner) , Supercritical Dryer

Computer skills:

-FEM simulation (ANSYS (+6 yrs),  PATRAN/NASTRAN, ABAQUS)

> Structural, geometrical nonlinear, modal, harmonic, transient, damping, thermal, buckling, fluid (CFD)
> Coupled fields : electric+ thermal,  thermal+fluid (CFD),  structural+piezoelectric
> Design optimization (ANSYS + DOT)

-Optimization software (DOT)
-Programming (Visual Fortran (+4 yrs) , C++, Excel, Matlab)

Experimental skills:

-Micro mechanical testing on INSTRON and MTS servo-hydraulic system
-Dynamic behavior measurement (Dynamic signal analyzer)
-Non-Destructive Evaluation techniques (X-Ray radiography, fiber optic sensors)
-Manufacturing of composite material (Hot press, Autoclave, VARTM)

• Membership:

  • Member, American Society of Mechanical Engineers (ASME), USA member
• Member, The International Society for Optical Engineering  (SPIE), USA member
• Journal Referee:

• Journal of Composite Material (JCM)
•  Journal of Intelligent Material Systems & Structures (JIMSS)

• "Energy Harvesting using Frequency Rectification," United States Provisional Patent (60/719,565), October 4, 2005.

• "Energy Harvesting by means of Thermo-Mechanical Device utilizing Bistable Ferromagnets," United States Provisional Patent, January, 2006.

• "SMA Microvalve/Thermostat," United States Provisional Patent (60/665,583), March 24, 2005.

1. D. G. Lee, D. D. Shin, G.P. Carman, “Large Flow Rate/High Frequency Microvalve Array for High Performance Actuators,”  Sensors and Actuator A: Physical, In Press, 2006
2. S. Chatterjee, M. Ujihara, D. G. Lee, Chen J., Lei S.,  G. P. Carman,” Spray Etching 2um Features in 304 Stainless Steel,”Journal of Micromechanic and Microengineering , Accepted, 2006.
3. D.D. Shin, D.-G. Lee, and G. P. Carman, “Thin Film NiTi Microthermostat Array,” Sensors and Actuator A: 130-131, pp.37-41, 2006.
4. S. K. Kim et al., “Electro-optic phase modulator using metal-defined polymer optical waveguide,” Applied Physics Letters, Vol. 87, 011107, 2005.
5. Q. Chen, D.-G. Lee, G. P. Carman., “Development of Large Flow Rate, Robust, Passive Micro Check Valves for Compact Piezoelectric ally Actuated Pumps,” Sensors and Actuators A, Vol. 117, pp. 325-330, 2004.
6. S. K. Kim et al., “Stress-induced Electro-Optic Polymer Waveguides Operating at both 1.31 um and 1.55um Wavelengths,” Electronics Letters, Vol. 40, No.14, 2004.
7. Lee, D. G., S.W. Or, and G. P. Carman, "A Piezoelectric Pump with Active Valve," Journal of Intelligent Material Systems & Structures, Vol.15, No. 2, pp. 107-115, 2003.
8. Lee, D. G., M. Mitrovic, G. P. Carman, and W. L. Richards, "Characterization of Fiber Optic Sensors for Structural Health Monitoring," Journal of Composite Materials, Vol. 36, No. 11, pp. 1349-1366, 2002.
9. Kim, D. J., D. G. Lee, and S. K. Ha, "Optimal Design of Composite Flywheel Rotor," Transactions of the Korean Society of Mechanical Engineers (A), Vol. 22, No. 7, pp. 1287-1298, 1998.  (Korean)
10. Yoon, Y. B., Y. S. Cho, D. G. Lee, and S. K. Ha, "Shape Estimation of the Composite Smart Structure Using Strain Sensors," Transactions of the Korean Society of Mechanical Engineers (A), Vol. 22, No.1, pp. 23 - 32, 1998. (Korean)
11. Lee, D. G. and S. K. Ha, "Optimal Design of Composites Laminated Pressure Vessels with Metallic Liners,” Journal of the Korean Society for Composite Materials, Vol. 10, No.1, pp.1-12, 1997. (Korean)
12. Lee, D. G. and S. K. Ha, "A Study on the Design of Lightweight, High Pressure CNG Vessel of Composite Materials," Journal of Engineering & Technology, Hanyang University, Vol. 2, No. 1, pp. 73 - 84, 1993(Korean)

1. M. Tieck, G. P. Carman D. G. Lee, “Electrical Energy Harvesting Using a Mechanical Rectification Approach”, IMECE2006-15712, 2006
2. Lee, D. G., D. Shin, and G. P. Carman, “High Flow Rate/High Frequency Microvalve Array,” ASME IMECE05, Microfluidics 2005 Session, IMECE2005-79294, 2005.
3. Shin, D., D. G. Lee, K.P. Mohanchandra, and G. P. Carman, “Thin Film NiTi Fluidic-Thermostat Array,” Transducers ’05, Seoul, Korea, June 5, 2005.
4. McKnight G., L. Momoda, D. G. Lee, D. Shin, G. Carman,”Miniature Thin Film NiTi Hydraulic Actuator with MEMS Microvalves,” Proceedings of SPIE, Vol. 5762, pp.  187-195, CA, Mar. 2005.
5. Lee, D., L. Richards, G. P. Carman, "Characterization of embedded fiber optic sensors for structural health-management system,” SPIE’s 11th Annual International Symposium on Smart Structures and Materials, Vol. 5390, pp.  505-512, CA, Mar. 2004.
6. Hill, Lisa R., G. P. Carman, D. Lee, B. Patrick, “ Shape memory alloy film for deployment and control of membrane apertures,” SPIE’s 11th Annual International Symposium on Smart Structures and Materials, Vol. 5166, pp. 271-280, CA, Mar. 2004.
7. Ujihara M., D. G. Lee, G. P. Carman, "System optimization of thin-film SMA micro pump, " SPIE’s 11th Annual International Symposium on Smart Structures and Materials, CA, 5389-32, Mar. 2004 (presentation only).
8. Pulliam, W. J., D. Lee, G. P. Carman, "Passive magnetostrictive composite films for turbomachinery fan blade damping, " 2003 ASME International Mechanical Engineering Congress, IMECE2003-43225, Washington, D.C,. Nov. 15-21, 2003.
9. Li, B., Q. Chen, D. G. Lee, and G. P. Carman, "Development of Robust Microvalves for Large Flow Rate Robust Hydraulic Actuators,” 2003 IEEE Conference on MEMS,pp.96-99,2003
10. Lee, D., D. Shin, G. P. Carman, Q. Chen, "Microvalves for SMA-based CHAD,” SPIE’s 10th Annual International Symposium on Smart Structures and Materials, Vol. 5055, pp.300-306, CA, Mar. 2003.
11. Shin, D., D. Lee, K. P. Mohanchandra, G. P. Carman, "Miniature actuator using thin-film shape memory alloy, " SPIE’s 10th Annual International Symposium on Smart Structures and Materials, Vol. 5054, pp.118-124, CA, Mar. 2003
12. Pulliam, W. J., D. Lee, G. P. Carman, G. P. McKnight, "Thin-layer magnetostrictive composite films for turbomachinery fan blade damping, " SPIE’s 10th Annual International Symposium on Smart Structures and Materials, Vol. 5054, pp.360-371, CA, Mar. 2003.
13. Lee, D., S. W. Or, C. O’Neill, and G. P. Carman, "Piezoelectric Pump with Innovative Active Valves,” SPIE’s 9th Annual International Symposium on Smart Structures and Materials, Vol. 4701, pp.530-536, San Diego, CA, Mar. 2002.
14. Shin, D., D. G. Lee, K. P. Mohanchandra, and G. P. Carman,” Thin Film Shape Memory Alloy Motor for A Compact Kinetic Energy Missile, " 13th International Conference on Adaptive Structures and Technologies (ICAST), Oct, Postdam/Berlin, Germany, Oct. 2002.
15. Shin, D., D. G. Lee, K. P. Mohanchandra, and G. P. Carman, " Development of a SMA-Based Actuator for Compact Kinetic Energy Missile, " SPIE’s 9th Annual International Symposium on Smart Structures and Materials, Vol. 4701, pp. 237-243, San Diego, CA, Mar. 2002.
16. Richards, W. L. et al., "Fiber Optic Sensor Development for the Structural Health Management of Reusable Launch Vehicles," Proceeding of the 3rd International Workshop on Structural Health Monitoring, pp.133-143, Stanford University, CA, 2001.
17. Lee, D., M. Mitrovic, G. P. Carman, and W. L. Richards, "Experimental Evaluation of Embedded EFPI Optical Fiber Sensors for Structural Health Monitoring," SPIE’s 8th Annual International Symposium on Smart Structures and Materials, Vol. 4327, pp.753- 762, Newport Beach, CA, Mar. 2001.
18. Lee, D., M. Mitrovic, Milan, G.  P. Carman, and W. L. Richards, "Prediction of Strength and Fatigue Properties of Embedded EFPI Sensors," SPIE’s 8th Annual International Symposium on Smart Structures and Materials, Newport Beach, CA, Mar 4-8, 2001 (presentation only).
19. Ha, S. K., D. G. Lee, and D. J. Kim, "Optimization of Hybrid Composite Rotor in Flywheel Battery," SAE Future Transportation Technology Conference and Exposition, August 11-13, Costa Mesa, 1998.
20. Ha, S. K., D. G. Lee, and D. J. Kim, "Design of Hybrid Composite Flywheel Rotor for an Energy Storage System," Structural Engineering World Congress (SEWC), July 19-23, San Francisco, CA, 1998
21. Lee, D. G. and S. K. Ha, "Design of Multi-layered Pressure Vessels of the Composite Materials Using Modified Mixed Variational Principle," Proceeding of Korean Society for Aeronautical & Space Science Fall Annual Meeting 97, pp. 56 - 53, 1997. (Korean)
22. Kim, D. J., D. G. Lee, and S. K. Ha, "Optimal Design of Composite Flywheel Rotor," Proceeding of KSME Fall Annual Meeting 97 (A), pp. 474 - 481, 1997. (Korean)
23. Lee, D. G. and S. K. Ha, "Optimal Design of Aluminum-Composites Laminated Pressure Vessels," Proceeding of KSME Fall Annual Meeting 96 A Solids and Structures Division, pp. 30 - 36, 1996. (Korean)