| 摘要 |
PURPOSE:To obtain an optical recording medium capable of recording and reproducing information for a long period of time without increasing recording power or causing a marked reduction in S/N (C/N), by providing a thin amorphous film having a specified composition of Te, Ti, Ag and Se on a base. CONSTITUTION:The recording medium is constituted basically of a transparent base disk 2 provided with a thin recording film 1 on the inside surface thereof, a protective base disk 3 and spacers 4, 5 for integrally fixing the disks 2, 3 with a predetermined spacing therebetween. A thin amorphous film having a composition of Te(100-x-y-z).Tix.Agy.Sez, wherein x, y and z are molar percentages and x+y+z<15, is used as the thin recording film 1, from the viewpoints of a longer useful life, output of a semiconductor laser diode for recording and reproduction, sensitivity, reliability or the like. The thickness of the film is usually 300Angstrom , and is preferably 300-500Angstrom in consideration of requirements of recording life, power of a recording laser, the diameter and the rotating speed of the disk, etc. |
