发明名称 |
Optical recording medium, manufacturing method for optical recording medium, and reproducing method for optical recording medium |
摘要 |
An optical recording medium 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 is recorded medium identification information, 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. Information is reproduced by irradiating the metal reflection film with a beam of light. In the sub-information area, a row of pits or a guide groove is formed on the substrate, and a track pitch of the row of pits or the guide groove is at least 0.24 μm wide and at most 0.45 μm wide.
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申请公布号 |
US7821909(B2) |
申请公布日期 |
2010.10.26 |
申请号 |
US20080237613 |
申请日期 |
2008.09.25 |
申请人 |
PANASONIC CORPORATION |
发明人 |
KAWAGUCHI YUKO;ABE SHINYA;TOMIYAMA MORIO;OHNO EIJI |
分类号 |
G11B7/24;G11B7/005;G11B7/007;G11B7/258;G11B7/26 |
主分类号 |
G11B7/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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