发明名称 |
Information record medium with a record/reproduction area and a reproduction-dedicated area |
摘要 |
On an information record medium (1), information is optically recorded and reproduced while a servo control is performed with respect to the information record medium by a push-pull method. The information record medium is provided with: a record/reproduction area (DA) having a groove track (2), which is wobbled and continuously formed and on which the information is recorded and reproduced by a phase changing method by use of a light beam (B) having a wavelength of not less than 630 nm (nanometer) and not more than 680 nm; and a reproduction-dedicated area (RA) where a plurality of phase pits (PI) are wobbled and formed in advance, each having a depth of not less than 60 nm and not more than 90 nm and where only an information reproduction is possible by the light beam.
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申请公布号 |
US6532206(B2) |
申请公布日期 |
2003.03.11 |
申请号 |
US20010781271 |
申请日期 |
2001.02.13 |
申请人 |
PIONEER CORPORATION |
发明人 |
MURAMATSU EIJI;TANIGUCHI SHOJI;KATO MASAHIRO |
分类号 |
G11B7/24;G11B7/007;G11B7/013;G11B7/09;G11B7/30;G11B27/19;G11B27/24;G11B27/30;(IPC1-7):G11B7/24 |
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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