| 摘要 |
PURPOSE:To carry out recording for a long time by providing a recording film of the material which is reversibly changed by the irradiation of an electromagnetic wave, and a protective film of a carbonaceous material on a substrate. CONSTITUTION:A recording film 3 of a material which is reversibly changed by the irradiation of an electromagnetic wave is provided on a substrate 1, and a protective film 2 of a carbonaceous material is furnished thereon to form the information recording medium. The polymer of a hydrocarbon densely cross-linked, i-carbon, graphite, diamond or their composite are used as the carbonaceous material constituting the protective film 2. The carbonaceous material consists essentially of C and can be added with H, N, O, etc., and the film is formed in 10-100nm or preferably 20-500nm thickness by sputtering, etc. Since the carbon-based thin film is used as the protective film 2 for the recording film 3, the protective film 2 is not crystallized or subjected to the chemical reaction with the recording film 3 even after recording and erasing are repeated, and hence recording can be carried out for a long time. |
