发明名称 |
INFORMATION RECORDING MEDIUM AND DISK DEVICE |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide an information recording medium with recording and reproducing characteristics enhanced by optimizing a groove shape of a substrate. <P>SOLUTION: The information recording medium has two or more recording layers, wherein a track pitch of the recording layer is in the range of 250 to 500 nm and a half-value width of the groove of the substrate is in the range of 47.5 to 72.5% of the track pitch. <P>COPYRIGHT: (C)2008,JPO&INPIT |
申请公布号 |
JP2008010107(A) |
申请公布日期 |
2008.01.17 |
申请号 |
JP20060182140 |
申请日期 |
2006.06.30 |
申请人 |
TOSHIBA CORP |
发明人 |
YAMAMOTO RYOSUKE;MATSUMARU SUKEAKI;UMEZAWA KAZUYO;TAKAZAWA KOJI;MORITA SEIJI;NAKAMURA NAOMASA;ANDO HIDEO |
分类号 |
G11B7/24;G11B7/007;G11B20/12 |
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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