发明名称 |
Optical information recording medium and production method thereof |
摘要 |
An optical information recording medium comprising a thin plastic substrate of 0.6 mm or thinner, wherein the substrate is protected against strain without being limited by a film structure and a film formation condition. A single-layer or multilayer thin film (70) is formed on a plastic disk-like substrate having a center hole (10). This thin film (70) has a strain relief area (72) inside a recording area (71). This strain relief area (72) is formed by setting an outer diameter of an undeposited inner portion (5) to a value satisfying the following formula (1), for example: A0<=AX<=-0.172P+0.163 where A0: diameter of center hole, AX: outer diameter of undeposited inner portion, P: total strain occurring in thin film when film depositing. |
申请公布号 |
AU7587196(A) |
申请公布日期 |
1998.06.03 |
申请号 |
AU19960075871 |
申请日期 |
1996.11.14 |
申请人 |
ASAHI KASEI KOGYO KABUSHIKI KAISHA |
发明人 |
MASATO TERADA;TATSUYA OKAMURA;KAZUYUKI FURUYA |
分类号 |
G11B7/24;G11B7/257;G11B7/26 |
主分类号 |
G11B7/24 |
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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