Affiliation: | (1) Research and Development Center, Toshiba Corporation, 1, Komukai Toshiba-cho, Saiwai-ku, 210 Kawasaki, Japan;(2) Present address: R&D Center from Komukai Works, Toshiba Corporation, 1, Komukai Toshiba-cho, Saiwai-ku, Kawasaki, 210, Japan |