Development of Lead-free solder alloys for electronic packaging by thermodynamic calculation, Synthesis of conductive nanoparticles for ink-jet printing, and research about the properties of catalysis by computer simulation technique in multi-scale.

1989~ Prof. KAIST
1993~1994 Exchange Professor, UC Berkeley & Lawrence Berkeley National Lab.
1994~1995 Advisor on Technology of Samsung Electro-mechanics
1996 Visiting Professor, Tohoku Univ., Japan
1997 Visiting Professor, Max-Planck Institute, Germany
1999 Visiting Professor, Univ. of Genoa, Italy
1999~ The Korean Chairman, Alloy Phase Diagram International Commission
2000 Exchange Professor, Penn State Univ., USA
2001~ Overseas Editorial Staff, Materials Transactions of JIM
2002 Visiting Professor, Institute of Metals & Materials Science, Poland
2003~2006 Editorial Director, The Microelectronics and Packaging Society
2008~ Educational director, The Korean Institute of Metals and Materials
2008~ Head of KAIST BK Material Foundation

2000 3rd Young Scientist Award, Division of Engineering