| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a phase change type optical recording medium capable of recording/erasing by utilizing a reversible phase change between an amorphous phase and a crystalline phase of a recording layer at the same capacity as DVD-ROM and a linear velocity of ≥10 m/s and having a large modulation degree and a good stability of an amorphous mark, and a method for manufacturing it and a method for recording. <P>SOLUTION: The phase change type optical recording medium has at least a first intermediate layer, the recording layer, a second intermediate layer, a reflective layer and a protective layer in this order on a substrate. The recording layer comprises an alloy of a composition expressed by GeγSbδ (wherein 5≤γ≤25; 75≤δ≤95; and γ and δ are each atomic%). Recording/erasing by utilizing the reversible phase change between the amorphous phase and the crystalline phase of the recording layer is possible even at a linear velocity of ≥10 m/s. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
