Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Optical recording media
An optical recording media has a disc substrate and two or more recording layers arranged apart from each other with a dielectric layer interposed therebetween to cause optical change simultaneously by irradiation with light, in which a first recording layer positioned near the disc substrate has a higher optical change temperature and a higher extinction coefficient compared with those of a second recording layer and a later recording layer.
Kabushiki Kaisha Toshiba
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Hideki Sumio Keiichiro Tsukasa Shinichi
Ito Ashida Yusu Nakai Tatsuta