发明名称 OPTICAL RECORDING MEDIUM, AND RECORDING/REPRODUCING METHOD FOR OPTICAL RECORDING MEDIUM AND OPTICAL RECORDING/ REPRODUCING DEVICE
摘要 The present invention is aimed at providing a dual-layer phase-change optical recording medium which allows a high-density recording and a recording, where the optical recording medium has a high recording sensitivity even to a low power light with a short wavelength such as blue laser beam, does not cause noises such as jitter, has superior overwrite performance and favorable archivability, allows easier focusing and tracking and enables a compatibility with a ROM. Therefore, it provides an optical recording medium including a substrate and, on the substrate at least a first recording composite layer, an intermediate layer, a second recording composite layer and a cover substrate in this order, wherein the groove depth of the cover substrate is such that the magnitude of a push-pull signal of the first recording composite layer is equal or greater with respect to a push-pull signal of the second recording composite layer.
申请公布号 EP1691352(A1) 申请公布日期 2006.08.16
申请号 EP20040819803 申请日期 2004.11.29
申请人 RICOH COMPANY, LTD. 发明人 SHINOTSUKA, MICHIAKI;SHINKAI, MASARU,;IWASA, HIROYUKI
分类号 B41M5/26;G11B7/004;G11B7/007;G11B7/09;G11B7/24;G11B7/243;G11B7/254;G11B7/257;G11B7/258 主分类号 B41M5/26
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