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US 2006/0077878 A1Published application
Phase-change optical recording media and optical recording-reproducing apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsTsukasa Nakai, Yasuaki Ootera, Sumio Ashida, Keiichiro Yusu, Nobuhisa Yoshida, Koji Takazawa, Naomasa Nakamura
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Abstract
The present invention relates to an optical recording media including two or more information layers, at least one of the information layers including a writable recording film. In the optical recording media, at least one information layer has protrusions and recesses that permit tracking and at least another one information layer is substantially flat.
Claims12
An optical recording media, comprising:
- two or more information layers, at least one of the information layers including a writable recording film, at least one information layer having protrusions and recesses that permit tracking and at least another one information layer being substantially flat.
Dependencies are inferred from the claim text.