1. Samsung Advanced Institute of Technology, Yong-in 449-712, Republic of Korea
2. Department of Electrical
Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
3. Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea
4. Samsung Corning Precision Materials, Gumi 730-360, Republic of Korea
5. Department of Materials Science and Engineering, Yonsei University, 134 Chinchon-Dong, Seoul 120-749, Republic of Korea