| 摘要 |
PURPOSE:To obtain a member for recording information which has good recording and reproducing characteristics and can be preserved for a long time by forming the thin film on a substrate into >=2 layers and providing a specific layer as at least one layer thereof. CONSTITUTION:Grooves for tracking are formed on the surface of an acrylic resin substrate 1 and after a layer 2 (about 600nm thickness) of a ''Parylene N'', a layer 3(50nm) composed of Sb2Se3, a layer 4(50nm) composed of Bi40Te45Se15 and a layer 5(600nm) of ''Parylene N'' are successively deposited by evaporation thereon, then a layer 6(2mum) of PMMA is coated thereon. Two sheets of such discs are stuck together by means of a self-adhesive agent 7. Recording of information by light is accomplished by utilizing the change in the atomic arrangement of the layers 3 and 4. Since the layer 2 of the org. material (''Parylene N'') having >=350 deg.C b.p. is provided, the reproducing characteristic is improved and the long-term preservation is made possible. |
