发明名称 |
Optical disc and manufacturing method for the same |
摘要 |
The width and/or depth of guide grooves on the disc substrate surface are changed in each data recording layer and the guide groove depth of the recording film layer is appropriately shaped in each data recording layer to provide a high density, high recording capacity optical disc. The optical disc has plural substrate layers each having plural guide grooves; plural data recording layers laminated on the substrate layers, each of the plural data recording layers having a recording film for recording data over the guide grooves; and an intermediate layer between the plural data recording layers. The guide groove width is different on each substrate layer. The guide grooves of the data recording layers formed according to the guide grooves of the substrate layer have the same pitch in each data recording layer.
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申请公布号 |
US2004141455(A1) |
申请公布日期 |
2004.07.22 |
申请号 |
US20040753363 |
申请日期 |
2004.01.09 |
申请人 |
TSUKUDA MASAHIKO;ABE SHINYA;SATO SHUJI |
发明人 |
TSUKUDA MASAHIKO;ABE SHINYA;SATO SHUJI |
分类号 |
G11B7/007;G11B7/26;(IPC1-7):G11B7/24 |
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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