| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize an initialization-free medium, having a recording density of 4.7 GB/disc-120 mm-in-diameter or larger, which responds to high-speed overwrite recording, and is compatible with DVD-ROMs. <P>SOLUTION: An optical recording medium, having a recording layer including Sb and Te, in addition, substantially no other elements or at least one of elements of group 1 to group 7 in the periodic table and remnant layers is a phase-change recording medium, wherein the remnant layers include a material for speeding up linear velocity, and by a recording operation through energy irradiation to the optical data medium, the other elements in an amount existed in the recording layer at end of a deposition process of the recording layer or more are migrated from the remnant layers into the recording layer and exist there. <P>COPYRIGHT: (C)2004,JPO |
