Phase change recording medium
AssigneeKabushiki Kaisha Toshiba
InventorsTsukasa NAKAI, Noritake Oomachi, Sumio Ashida, Naomasa Nakamura, Keiichiro Yusu, Yasuhiro Satoh
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Abstract
According to one embodiment, in a phase change optical disk which has a substrate and a multi-layered including an interference film, phase change recording film, interface film, and reflecting film, and in which information is reversibly recorded in or erased from the recording film by using light, an element (e.g., Ge or Te) forming the phase change recording film has segregation or a concentration distribution in the thickness direction of the recording film from a portion in contact with the phase change recording film.
Claims17
An optical recording medium which comprises a substrate and a multi-layered structure including an interference film, a recording film configured to reversibly change an atomic arrangement, a crystallization promoting film in contact with the recording film, and a reflecting film, and in which information can be reversibly recorded in and erased from the recording film by using light,
- wherein an element forming the recording film has one of segregation distribution and a concentration distribution in a thickness direction of the recording film from a portion in contact with the recording film.
Dependencies are inferred from the claim text.