OPTICAL INFORMATION RECORDING MEDIUM

摘要

PURPOSE:To perform recording by low-energy light without decreasing the S/N ratio of reproduction by incorporating a material which absorbs write light in an information recording layer and thus decreasing the transmittivity of the write light greatly. CONSTITUTION:A gelatine solution 21 contg. dispersed colloidal silver particles 22 of 100Angstrom particle size containing triphenylmethane dye 23 is applied onto a very smooth glass plate to a 20mum coating thickness by using a wire bar, and the coating is caked in cold wind and then dried in hot wind for 90min to obtain a colloidal silver dispersed layer with a 1mum dry film thickness. Then, the colloidal silver dispersed layer is coated with a silver iodobromide emulsion (containing 3mol% silver iodide) for a high-resolution dry plate, thus providing an emulsion layer with a 2mum dry film thickness. The precusror of the optical information recording medium obtained as mentioned above is developed with a dissolved body to obtain the optical information recording medium which has 0% transmittivity and 45% reflectivity when the medium is irradiated with 6328Angstrom wavelength light on the substrate side.