1. Department of Materials Science and Engineering
2. Frederick Seitz Materials Research Laboratory
3. University of Illinois at Urbana-Champaign
4. Urbana
5. USA
6. Department of Safety Engineering
7. Seoul National University of Science and Technology
8. Seoul 01811
9. Republic of Korea
10. Department of Electrical and Computer Engineering
11. Inter-University Semiconductor Research Center
12. Seoul National University
13. Seoul