著者

Hosoda Yasuo Higuchi Takanobu Shida Noriyoshi Imai Tetsuya Iida Tetsuya Kuriyama Kazumi Yokogawa Fumihiko

出版者

The Japan Society of Applied Physics

雑誌

Japanese Journal of Applied Physics (ISSN:00214922)

巻号頁・発行日

vol.44, no.5, pp.3587-3590, 2005

被引用文献数

4

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We realized an inorganic write-once disk for an optical recording system of the Blu-ray disk format. We developed a new Al alloy for the reflective layer and a Nb-compound oxide nitride material for the dielectric layer. By adopting these materials for the reflective layer and the dielectric layer of our write-once disk, we achieved complete exclusion of toxic substances specified in the pollutant release and transfer register (PRTR) law. That is, this disk did not contain any substances specified in the PRTR law. We confirmed this disk to be compatible with 1× to 2× recording at the user capacity of 25.0 GB. The bottom jitter values of both 1× and 2× were less than 6.0%. In addition, we developed another kind of substrate, which was made of a natural polymer derived from corn starch. The bottom jitter value was 6.0% at the user capacity of 25.0 GB with the limit equalizer.