发明名称 |
Optical information recording medium, manufacturing method therefor, manufacturing apparatus therefor, and optical information recording and reproducing apparatus |
摘要 |
In an optical information recording medium having at least two information layer, guide grooves for tracking or sample pits or information pits corresponding to information signals are formed on a surface of a first substrate. A first information layer formed by a thin film for reflecting a portion of a light beam made incident on the first substrate and permitting penetration of a portion of the light beam is formed on a surface of the first substrate. Guide grooves for tracking or information pits corresponding to information signals are formed on a surface of a second substrate. A second information layer having a reflectance higher than that of the first information layer is formed on a surface of the second substrate. Between the first information layer and the second information layer, there is formed a transparent separation layer for positioning the first information layer and the second information layer to be spaced a predetermined distance apart from each other. |
申请公布号 |
US6434095(B1) |
申请公布日期 |
2002.08.13 |
申请号 |
US20000599189 |
申请日期 |
2000.06.22 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
NISHIUCHI KENICHI;NAGATA KEN'ICHI;AKAHIRA NOBUO |
分类号 |
B29C65/48;G11B7/007;G11B7/085;G11B7/09;G11B7/13;G11B7/24;G11B7/243;G11B7/244;G11B7/254;G11B7/256;G11B7/26;G11B11/105;(IPC1-7):G11B7/00 |
主分类号 |
B29C65/48 |
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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