| 发明名称 |
INFORMATION RECORDING MEDIUM AND DISC APPARATUS |
| 摘要 |
According to one embodiment, an information recording medium has two or more recording layers, the track pitch falls within the range from 250 to 500 nm, and the half maximum full-width of the groove of the substrate falls within the range from 47.5% to 72.5%.
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| 申请公布号 |
US2008013440(A1) |
申请公布日期 |
2008.01.17 |
| 申请号 |
US20070768499 |
申请日期 |
2007.06.26 |
| 申请人 |
YAMAMOTO RYOSUKE;MATSUMARU MASAAKI;UMEZAWA KAZUYO;TAKAZAWA KOJI;MORITA SEIJI;NAKAMURA NAOMASA;ANDO HIDEO |
发明人 |
YAMAMOTO RYOSUKE;MATSUMARU MASAAKI;UMEZAWA KAZUYO;TAKAZAWA KOJI;MORITA SEIJI;NAKAMURA NAOMASA;ANDO HIDEO |
| 分类号 |
G11B7/24 |
主分类号 |
G11B7/24 |
| 代理机构 |
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