| 摘要 |
PURPOSE:To obtain a recording medium excellent in the recording sensitivity to a laser light, life, resolution, and S/N at reading, by providing a layer including mixture of a metal and at least one oxide such as Al2O3, WO3, and GeO2. CONSTITUTION:The most preferable state of laser recording and reading methods is a method recording and reading information by irradiating a laser beam from a support side. This is introduced from the discovery that no granularity exists at the boundary between the base and a vapor-deposition film even if more or less granularity exists on the surface of a recording layer at the constituent having the highest laser sensitivity, and the excellent S/N is obtained by using the write/reading method. In the write and reproduction from the base side, two bases having a recording layer are fixed via a seak by opposing the recording layer and an air gap is provided between the recording layers (so- called air sandwich type), which are suitable especially, and both side recording is attained. |
