发明名称 |
OPTICAL RECORDING MEDIUM, ITS MANUFACTURING METHOD, AND RECORDING/REPRODUCING METHOD |
摘要 |
<p>An object is to provide an optical recording medium which can obtain a sufficient focusing characteristic even at recording speeds at which a recording linear velocity exceeds 4x speed at the same capacity as a DVD-ROM, and which can suppress in-plane fluctuations of the degree of modulation, and which enables highly reliable recording, and a method of manufacturing the optical recording medium and a recording and reproducing method. To this end, there is provided an optical recording medium having a substrate, and at least a recording layer and a reflective layer on the substrate, wherein the optical recording medium is formed such that the substrate has a set central value of a thickness, and when there is a substrate thickness within a given range from the set central value, an axial direction acceleration of the optical recording medium has a maximum allowable value, and as an amount of deviation from the set central value exceeds the given range, a maximum allowable value of the axial direction acceleration at the optical recording medium becomes smaller. <IMAGE></p> |
申请公布号 |
EP1607953(A1) |
申请公布日期 |
2005.12.21 |
申请号 |
EP20040723400 |
申请日期 |
2004.03.25 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
ITO, KAZUNORI;ISHIMI, TOMOMI;KOTAKA, KAZUHIRO;TOMURA, TATSUYA;NAKAMURA, YUKI;YAMADA, KATSUYUKI |
分类号 |
G11B7/24;G11B7/004;G11B7/0045;G11B7/005;G11B7/243;G11B7/244;G11B7/246;G11B7/247;G11B7/248;G11B7/26;(IPC1-7):G11B7/24 |
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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