| 摘要 |
PURPOSE:To stabilize an amorphous state, to erase at a high speed and to stabilize a recording state by forming a recording layer mainly of In10Sb3Te7. CONSTITUTION:A recording layer 2 for recording information and an organic material protective layer 3 are formed on a substrate 1 in an information recording medium. The recording layer 2 is formed mainly on In10Sb3Te7 intermetallic compound, and phase-changed reversibly between a crystal and an amorphous state by irradiating it with optical beams of different conditions. Since its crystallizing velocity is high, it initializing velocity and erasing velocity are fast. Since it contains 30atomic% or more of Te, its amorphous state is stable. The recording layer 2 can be formed by vacuum depositing, sputtering, etc. The protective layer 3 is so disposed as to prevent damage, dusts on the surface in case of handling the information recording medium, and composed of an ultraviolet ray curable resin, etc. The recording layer 2 is so composed as to be interposed between inorganic protective layers 4 and 5 to prevent the recording layer 2 from age-changing. |
