| 摘要 |
PURPOSE:To enhance a recording sensitivity and a signal quality, by a method wherein a light recording material used for a recording layer in a light recording medium contains a tin and a nickel oxide each having a specific volume content. CONSTITUTION:A recording film 2 contains a tin of 30% or over and a nickel oxide of 20% or over in volume content as integral ingredients. Tin is a metalloid having a low melting point, therefore being sperior in recording sensitivity, but inferior in surface properties, which is caused by its crystallinity. The recording layer containing a nickel oxide in addition to a thin is remarkably improved in the surface properties. The change of NiO volume content in the recording layer to less than 20% results in large noise which causes the poor C/N, i.e. the proportion of signal/noise, and that of Sn volume content to less than 30% results in insufficient recording sensitivity which also causes the poor C/N. Accordingly, the composition range of NiO of 20% or over in volume content and Sn of 30% or over in volume content is practically applicable. |
