Mechanical Engineering Faculty Profile:

Dr. Bongtae Han
Professor of Mechanical Engineering

Mechanical design of microelectronics devices; Design assessment of microelectronics devices for optimum reliability; Experimental micro and nanomechanics (development of optical methodologies for characterization of micro and nano structures and mechanical properties)

(301) 405-5255 | bthan@umd.edu | website | Room 2147, Building 088, Glenn L. Martin Hall

Education
Ph.D., Virginia Polytechnic Institute and State University, 1991

Recent Publications
B. Han, “Thermal Stresses in Microelectronics Subassemblies: Quantitative Characterization using Photomechanics Methods,” Journal of Thermal Stresses, Vol. 26, pp. 583-613 (2003).

M. Mello, B. Han and Z. Wang, “Infrared Diffraction Interferometer for Co-planarity Measurement of High Density Solder Bump Pattern,” Optical Engineering, Vol. 43, No. 4, pp. 888-894, (2004).

Z. Wang and B. Han, “Advanced Iterative Algorithm for Phase Extraction of Randomly Phase-Shifted Interferograms,” Optics Letters, Vol. 29, No. 14, pp. 1671-1673, (2004).

S.-M. Cho, B. Han and J. Joo, “Temperature Dependent Deformation Analysis of Ball Grid Array Package Assembly under Accelerated Thermal Cycling Condition,” Journal of Electronic Packaging, Transaction of the ASME, Vol. 126, pp. 41-47 (2004).

E. Stellrecht, B. Han and M. Pecht, “Characterization of Hygroscopic Swelling Behavior of Mold Compounds and Plastic Packages,” IEEE Transactions on Components and Packaging Technologies, Vol. 27, No. 3, pp. 499-506 (2004).

K. Verma and B. Han, “Real-time Observation of Thermally Induced Warpage of Flip-Chip Package Using Far Infrared Fizeau Interferometry,” Experimental Mechanics, Vol. 44, No. 6, pp. 628-633, (2004).

Z. Wang, J. F. Cárdenas-García and B. Han, “Inverse Method to Determine Elastic Constants Using a Circular Disc and Moiré Interferometry,” Experimental Mechanics, Vol. 45, No. 1, pp. 27-34 (2005).

C.-W. Han and B. Han, “Contrast of Shadow Moiré at High Order Talbot Distances,” Optical Engineering, Vol. 44, No. 2, 28002:1-6 (2005).

C.-W. Han and B. Han, “Error Analysis of Phase Shifting Technique When Applied to Shadow Moiré,” Applied Optics, Vol. 45, No. 6, pp. 1124-1133 (2006).

Scientific and Professional Membership
Fellow, American Society of Mechanical Engineers (ASME);Fellow, Society for Experimental Mechanics (SEM); Associate Editor, ASME Transactions, Journal of Electronic Packaging (2004-2007); Member of International Editorial Board, The Journal of Experimental Mechanics, (2005–); Associate Editor, Journal of Electronic Packaging, Transaction of ASME; Executive Board Member, Society for Experimental Mechanics (1997-1999); Symposium Chair, The 1st International Symposium on Optical Methodologies and Metrologies for Microelectronics and Photonics, 2004 SEM Annual Meeting, Costa Mesa, CA, June 2004; Symposium Chair, The International Symposium on Recent Developments of Experimental Mechanics, 1999 ASME Summer Annual Meeting, Blacksburg, VA, June 1999.

Honors and Awards
Fellow, Society for Experimental Mechanics (SEM - 2005); Associate Editor of the Year Award, ASME (2005); Best Paper Award, IEEE Transactions on Components and Packaging Technologies (2004); Gold Award (best paper in the Analysis and Simulation session), 1st Samsung Technical Conference (2004); Brewer Award, Outstanding Experimental Stress Analyst, Society for Experimental Mechanics (2001); IBM Excellence Award for Outstanding Technical Achievements (1994)

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