| 摘要 |
PURPOSE:To provide an optical recording medium light in weight, free of toxicity, having excellent stability and easy to produce, by using a polished carbonaceous material for a recording layer, and utilizing variations in the Raman spectrum caused by irradiation with laser beams for recording information. CONSTITUTION:A recording layer is constituted of a carbonaceous material, and it is preferable that a base and the recording layer are constituted of the same carbonaceous material. The carbonaceous material means a material consisting solely of carbon or comprising carbon as a main constituent, such as an extremely highly crystalline and highly oriented carbon, coke, vitreous carbon confirmed to be amorphous by X-ray analysis and carbon black in which ultra fine particles are aggregated. Particularly preferably, a vitreous carbonaceous material is used. Information is written into and read from a optical recording medium by a laser beam. A laser light source may be, for example, a neon, helium-cadmium, argon, helium-neon, ruby or semiconductor laser device. |
