| 摘要 |
PURPOSE:To ensure that a highly sensitive optical recording medium is obtained by providing a constitution in which a thin recording film layer generates optically detectable change due to a mutual reaction caused by the heat generation and temperature increase of two different materials in a mixed state or a laminated state under the projection of a laser beam, on a substrate. CONSTITUTION:In an optical information recording medium where a thin recording film layer 2 which causes an optically sensible change at least upon projection of a laser beam is provided on a substrate 1, the fine recording film layer 2 consists of a mixture or a laminated product of two materials, which react with each other, if their temperature is increased due to heat generated by projection of a laser beam, resulting in a thermal reaction. Under this constitution, if the thin recording film layer 2 is thermally caused to increase its temperature by irradiating a medium with a laser beam, a thermal reaction occurs to generate a larger heat energy than an energy charged by projection of a laser beam. Therefore, it is possible to record data by allowing even a small optical power of laser beam to change the condition. |
