1. Organic Specialty Materials Research Laboratory, Ube Industries, Ltd., 8-1, Goi-minamikaigan, Ichihara, Chiba 290-0045, Japan
2. Corporate Research and Development, Ube Industries, Ltd., 1978-5, Kogushi, Ube, Yamaguchi 755-8633, Japan
3. Nanoelectronics Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1, Umezono, Tsukuba, Ibaraki 305-8568, Japan