发明名称 |
INFORMATION RECORDING MEDIUM, RECORDING/REPRODUCING APPARATUS, AND STAMPER |
摘要 |
Data track patterns and servo patterns are formed on an information recording medium by concave/convex patterns divided into ring-shaped regions that are concentric with the data track patterns. In the servo patterns, a unit convex length and a unit concave length along the direction of rotation increase in each ring-shaped region from an inside to an outside of the ring-shaped region in proportion to the distance from the center of the data track patterns and a value produced by dividing an average unit convex (or concave) length inside each ring-shaped region by a distance from the center to the ring-shaped region decreases toward the outer periphery of the medium. The ring-shaped regions include plural first regions between an innermost region and an outermost region. Respective lengths along a radial direction of the first regions increase toward an outer periphery of the medium.
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申请公布号 |
US2009168245(A1) |
申请公布日期 |
2009.07.02 |
申请号 |
US20080342860 |
申请日期 |
2008.12.23 |
申请人 |
TDK CORPORATION |
发明人 |
SOENO YOSHIKAZU;SHIMAKAWA KAZUYA |
分类号 |
G11B5/82;B29C47/00 |
主分类号 |
G11B5/82 |
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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