发明名称 |
Multi-layer optical recording medium |
摘要 |
A novel multi-layer optical disc according to the present invention can treat a large volume of information without deterioration in level of reproduction signals from the respective information storage layers thereof. The multi-layer optical disc comprises a substrate having a light-transmission property, a read-only-memory type information storage portion formed on the substrate, a semi-transmission layer disposed on the read-only-memory type information storage portion, a spacer layer disposed on the semi-transmission layer and having a light-transmission property, and a rewritable information storage layer disposed on said spacer layer.
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申请公布号 |
US5726970(A) |
申请公布日期 |
1998.03.10 |
申请号 |
US19950615965 |
申请日期 |
1995.03.14 |
申请人 |
SONY CORPORATION |
发明人 |
KANEKO, MASAHIKO;NAKAOKI, ARIYOSHI;SAKAMOTO, TETSUHIRO |
分类号 |
G11B7/005;G11B7/00;G11B7/085;G11B7/24;G11B11/10;G11B11/105;G11B13/00;(IPC1-7):G11B7/24;G11B3/74 |
主分类号 |
G11B7/005 |
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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