发明授权
- 专利标题: Optical recording medium and manufacturing method thereof
- 专利标题(中): 光记录介质及其制造方法
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申请号: US09244200申请日: 1999-02-04
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公开(公告)号: US06194046B1公开(公告)日: 2001-02-27
- 发明人: Toru Abiko , Kazutomo Miyata
- 申请人: Toru Abiko , Kazutomo Miyata
- 优先权: JP10-028677 19980210
- 主分类号: B32B302
- IPC分类号: B32B302
摘要:
An optical recording medium having sufficient repetition recording durability and its manufacturing method. A first dielectric layer 2 is layered on a major surface 1a of a substrate 1, and a recording layer 5, made up of two layers, namely a first thin film 3 and a second thin film 4 having different crystallization start temperatures, is formed on the first dielectric layer 2. A second dielectric layer 6, a reflective layer 7 and a protective layer 8 are then sequentially formed. One of the first thin film 3 or the second thin film 4 preferably contains nitrogen or oxygen. It is more desirable that the first thin film 3 lying towards the substrate 1 contains nitrogen or oxygen. The difference between the crystallization start temperature of the first thin film 3 and that of the second thin film 4 be 20° C. or more. It is more desirable that the crystallization start temperature of the first thin film 3 lying towards the substrate 1 be higher by 20° C. or more than that of the second thin film 4. The thicknesses of the first thin film 3 and the second thin film 4 are desirably each 3 nm or more.
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