发明名称 |
OPTICAL RECORDING MEDIUM AND METHOD FOR PRODUCING THE SAME |
摘要 |
An optical recording medium, comprising: a substrate on which information is formed as pit rows constituted by concavities and convexities having a predetermined track pitch; at least a first metal reflective layer; and a transparent resin layer formed on the first metal reflective layer, which are formed on the substrate, wherein the information is reproduced by applying a light beam onto a signal face formed on the resin layer side of the first metal reflective layer, characterized in that the following relational expression: <DF>1.0 < D(S)/D(L)≤1.3 </DF> is satisfied, provided that a depth of the shortest pit formed in the signal face is D(S) and a depth of the longest pit formed in the signal face is D(L). <IMAGE>
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申请公布号 |
EP1544851(A1) |
申请公布日期 |
2005.06.22 |
申请号 |
EP20030795219 |
申请日期 |
2003.08.12 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KAWAGUCHI, YUUKO;TOMIYAMA, MORIO |
分类号 |
G11B7/007;G11B7/013;G11B7/24;G11B7/258;G11B7/26;(IPC1-7):G11B7/007 |
主分类号 |
G11B7/007 |
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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