发明名称 |
DISK SUBSTRATE AND OPTICAL DISK |
摘要 |
A data area to record and/or reproduce data and an eccentricity measuring area 14 in which a groove area formed with spiral grooves and a planer mirror area are spatially alternately arranged are provided for a disc substrate. A width of groove area formed in the eccentricity measuring area, a width of mirror area, and an interval between the grooves in the groove area are selected so that a conventional mechanical characteristics measuring apparatus can track a plurality of grooves formed in the groove area as if the grooves were a single groove. <IMAGE>
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申请公布号 |
EP1564733(A1) |
申请公布日期 |
2005.08.17 |
申请号 |
EP20030754185 |
申请日期 |
2003.10.20 |
申请人 |
SONY CORPORATION |
发明人 |
FUKUSHIMA, YOSHIHITO;NAKANO, JUN;MASUHARA, SHIN;KOSHITA, AKIO |
分类号 |
G11B7/24;G11B7/007;G11B7/09;G11B7/095;(IPC1-7):G11B7/24;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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