G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 7/24 (2006.01) G11B 7/005 (2006.01) G11B 7/007 (2006.01) G11B 7/26 (2006.01)
Patent
CA 2477869
An optical recording medium: which includes a main-information area in which a metal reflection film is formed on a substrate where a row of pits is formed as main data, and a sub-information area in which medium identification information is recorded which is used to identify the optical recording medium individually by removing the metal reflection film partially and forming a plurality of reflection-film removed areas; and whose information is reproduced by irradiating the metal reflection film with a beam of light, in which in the sub-information area, a row of pits or a groove is formed on the substrate, and the track pitch of the row of pits or the groove is 0.24µm or wider and 0.45 µ m or narrower.
L'invention concerne un support d'enregistrement optique comportant une zone d'informations principales produite par formation d'un film réfléchissant métallique sur un substrat présentant un système de puits en tant que données principales, et une zone d'informations secondaires produite par décapage partiel du film réfléchissant métallique de manière à former une pluralité de zones libres destinées à l'enregistrement d'informations d'identification de support pour l'identification du support d'enregistrement optique. Les informations sont reproduites par application d'un faisceau lumineux sur le film réfléchissant métallique. Dans la zone d'informations secondaires, un système de puits ou une rainure guide est formé dans le substrat. La profondeur du système de puits ou de la rainure guide est de 0,24 à 0,45 mu m.
Abe Shinya
Kawaguchi Yuko
Ohno Eiji
Tomiyama Morio
Matsushita Electric Industrial Co. Ltd.
Panasonic Corporation
Riches Mckenzie & Herbert Llp
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