| 摘要 |
PURPOSE:To provide a light recording system good in storage stability and capable of forming additionally written stable records, by forming pits only on a layer not absorbing light of a light recording medium having at least 2 layers of one absorbing wavelengths of light for writing and the other substantially not absorbing both of lights for writing and reading. CONSTITUTION:A 18nm thick platinum(Pt) layer 18 for absorbing wavelengths of writing light 2, and a 50nm thick selenium(Se) layer 4 for not absorbing wavelengths of the writing light 2 and reading light (not illustrated) are successively laminated on a polymethylmethacrylate (PMMA) base 1. A pit 5 is formed on this light recording medium, as illustrated on the figure, by irradiating the medium with the semiconductor laser beams 2 of 830 laser beams. Temp. of the Pt film 3 is raised by the absorption of the beams, the Se film located above is melted, and the pit 5 is formed. In addition, the energy density of the semiconductor laser beams 2 is set to the value or lower not causing any geometrical deformation of the Pt film 3. |
