发明名称 |
MULTIVALUE RECORDING / REPRODUCING METHOD AND PHASE-CHANGE MULTIVALUE RECORDING MEDIUM |
摘要 |
<p>A multilevel recording method based on a novel principle utilizing a phase change medium. The method comprises the steps of: radiating a recording energy beam against an information recording medium having a recording layer to locally melt the recording layer, the recording layer being adapted to produce a phase change between a crystalline state and an amorphous state upon being radiated with an energy beam; and forming an amorphous mark by cooling during a solidifying process to record information in the medium; wherein the size of the amorphous mark is controlled mainly by a competition between a recrystallization process and an amorphization process during the solidifying process; wherein an intensity of reflected light from a reproducing light beam radiated region is controlled in three or more multiple recording levels according to an optical characteristic difference between a crystalline region and a amorphous region and their areas. <IMAGE></p> |
申请公布号 |
EP1128365(A1) |
申请公布日期 |
2001.08.29 |
申请号 |
EP19990949400 |
申请日期 |
1999.10.25 |
申请人 |
MITSUBISHI CHEMICAL CORPORATION |
发明人 |
OHNO, TAKASHI;HORIE, MICHIKAZU |
分类号 |
G11B7/0045;G11B7/005;G11B7/125;(IPC1-7):G11B7/004;G11B7/24 |
主分类号 |
G11B7/0045 |
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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