| 摘要 |
PURPOSE:To increase the deletion speed, prolong the life of a recording section and enhance the physical strength of an acid-resistant, anticorrosive recording film by adding a specific material to a recording layer provided on a substrate, as a main component. CONSTITUTION:An information recording medium contains a material expressed by a formula 1 in a recording layer provided on a substrate, as a main component. If the quantity o of Ge is 0.05 or less, the medium is thermally unstable and its life is less reliable. If the quantity o is 0.30 or more, the medium is less sensitive. If the quantity p of Sb is 0.10 or less, the deletion speed is reduced. If the speed is 0.40 or more, the medium is less sensitive in terms of recording. If the quantity q of Te is 0.40 or less, the recording sensitivity fails. If the quantity q is 0.60 or more, the storage stability and antioxidation property deteriorate. lf the content x of oxygen is 0.05 or less, no improvement is seen in the deletion speed and thermal stability. If the content x is 0.20 or more, the contrast between the recorded part and the unrecorded part worsens. Plain glass, ceramics or resin can be used as a substrate, and the resin substrate is most suitable in terms of molding property and cost. The recommendable resins are polycarbonate and acrylic resins as these demonstrate high workability and optical characteristics. |
