发明名称 |
OPTICAL DISC AND METHOD FOR MANUFACTURING SAME |
摘要 |
An optical disc and its manufacturing method in which humps may be prohibited from being formed on an outer rim area of the disc to assure optimum surface properties of a light transmitting layer of the disc to contribute to further increase in recording capacity. On a substrate 2 of an optical disc 1 are sequentially formed a recording portion 6 and a light transmitting layer 5. The light falls on the light transmitting layer 5 to record and/or reproduce information signals for a signal recording area 6a of the substrate 2. The radial distance D from the outermost rim of the substrate 2 to the signal recording area 6a is selected to be larger than the radial width L of a hump 5a formed on the outer rim of the light transmitting layer 5. The hump 5a has a height h from the surface of the light transmitting layer 5 not larger than 70 mum.
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申请公布号 |
US2001046203(A1) |
申请公布日期 |
2001.11.29 |
申请号 |
US19990226701 |
申请日期 |
1999.01.07 |
申请人 |
NISHIDA MASATO;SAKAMOTO TETSUHIRO;KASHIWAGI TOSHIYUKI;FURUKI MOTOHIRO |
发明人 |
NISHIDA MASATO;SAKAMOTO TETSUHIRO;KASHIWAGI TOSHIYUKI;FURUKI MOTOHIRO |
分类号 |
B29D17/00;G11B7/24;G11B7/253;G11B7/254;G11B7/26;(IPC1-7):B32B31/00;G11B3/70;G11B5/84 |
主分类号 |
B29D17/00 |
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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