发明申请
- 专利标题: Multilayer phase-change information recording medium, and method for recording and reproducing using the same
- 专利标题(中): 多层相变信息记录介质,以及使用其进行记录和再现的方法
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申请号: US11083298申请日: 2005-03-17
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公开(公告)号: US20050207331A1公开(公告)日: 2005-09-22
- 发明人: Masaru Shinkai , Michiaki Shinotsuka , Hiroyuki Iwasa
- 申请人: Masaru Shinkai , Michiaki Shinotsuka , Hiroyuki Iwasa
- 优先权: JP2004-080324 20040319
- 主分类号: B41M5/26
- IPC分类号: B41M5/26 ; G11B7/0045 ; G11B7/24 ; G11B7/243 ; G11B7/254 ; G11B7/257 ; G11B7/258 ; G11B7/26
摘要:
The object of the present invention is to provide a multilayer phase-change information recording medium comprises a substrate, and N layers of information layer (N represents an integral number of 2 or more), and each of the information layers comprises at least a recording layer in which information is recorded by irradiating laser beam to induce a phase change between crystalline phase and amorphous phase. The present invention is characterized in that when the information layer is disposed so that a first information layer, a second information layer, a third information layer . . . , and N information layer are disposed in this sequence from the laser beam irradiation side, at least one information layer other than the N information layer comprises a lower protective layer, a recording layer, an upper protective layer, a reflective layer, and a thermal diffusion layer disposed in this sequence is from the laser beam irradiation side; the thermal diffusion layer comprises at least indium (In) and oxygen (O) and further comprises any one of titanium (Ti) and zirconia (Zr); and the atomic ratio of indium (In) to all the metal elements in the thermal diffusion layer, In/all the metal elements, is 0.75 to 0.9.