G - Physics
11
B
G11B 7/007 (2006.01) G11B 7/013 (2006.01) G11B 7/24 (2006.01) G11B 20/12 (2006.01)
Patent
CA 2420971
An optical disc having lands and grooves, on both of which data is recorded. The interval between the center of a land and the center of a groove adjacent to the land is at least 0.28 µm, giving a data efficiency of at least 80%. The above arrangement can provide an optical disc having a recording capacity of at least 25 GB.
L'invention concerne un disque optique présentant des parties plates et des parties en creux, sur lesquelles sont enregistrées des données. L'intervalle entre le centre d'une partie plate et le centre d'une partie en creux adjacente à cette dernière est d'au moins 0,28 µm, ce qui permet d'obtenir une efficacité des données d'au moins 80 %. Cet agencement permet de produire un disque optique présentant une capacité d'enregistrement d'au moins 25 Go.
Furumiya Shigeru
Ishibashi Hiromichi
Ishida Takashi
Minamino Junichi
Nakamura Atsushi
Matsushita Electric Industrial Co. Ltd.
Osler Hoskin & Harcourt Llp
Panasonic Corporation
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