Information recording medium
AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsIsao Morimoto, Kazuyoshi Itagaki, Koichi Mori
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Abstract
An information recording medium comprising a substrate and superimposed thereon a recording layer composed of Sb, Te and Ge has been found to be advantageously employed, because of its high thermal stability as well as high sensitivity and high S/N ratio, in a system of recording information by exposing an energy beam to a recording medium to cause the exposed areas to be different in optical extinction coefficient from the non-exposed areas.
Claims22
An information recording medium, for use in a system of recording information by exposing a medium to an energy beam, said medium comprising a substance capable of changing in optical extinction coefficient upon being heated, causing the exposed areas to be different in optical extinction coefficient from the non exposed areas without ablation of the medium, wherein said information recording medium comprises a substrate and superimposed thereon a recording layer composed of Sb, Te and Ge.
Dependencies are inferred from the claim text.