OPTICAL DATA RECORDING MEDIUM AND RECORDING METHOD

摘要

PURPOSE:To obtain an optical data recording medium capable of being formed into a single plate structure and made thin while keeping high sensitivity and a high C/N ratio by forming a recording layer from a dye film having a spectral reflectivity peak in the vicinity of a recording/regenerating wavelength and presribing the thickness of said film to one maximizing the film thickness dependence of reflectivity in the recording/regenerating wavelength. CONSTITUTION:The recording/regeneration of data are performed using light having a wavelength in the vicinity of one wherein the spectral reflectivity of a dye film becomes peak. Therefore, a dye showing the peak of spectral reflectivity in the vicinity of a recording/regenerating wavelength is used in a recording layer and the thickness of the recording layer is prescribed so that the film thickness dependence of reflectivity becomes max. in the recording/regenerating wavelength. The recording medium using this dye film has high reflectivity and low absorption. When the recording medium having the org. dye film having the above mentioned optical characteristics and the thickness as the recording layer is used, the absorption of light becomes little and the sudden decomposition or sublimation of the dye film becomes hard to generate but the interference structure of the film is destructed by the slight deformation of the dye film and reflectivity is lowered to a large extent to make it possible to perform recording.