| 摘要 |
<p>An optical recording medium capable of recording at various recording/transfer speeds from low to high using a simple recording strategy. A low to high speed write once optical recording medium (10) includes a recording layer (18) having a first and a second sub-recording layer (18A, 18B) each containing a metal as a main content and laminated on each other. Using a recording strategy consisting of only a ratio of write power and bias power, a laser beam of blue color wavelength or below is applied to the recording layer (laminated recording layer) (18). By this laser beam application, the metals contained as main contents in the first and the second sub-recording layers (18A, 18B) are diffused and mixed. This mixing forms a recording mark which is made into a single layer and whose reflectance is irreversibly changed. Since this recording mark formation step does not require a specific recording strategy, it is possible to obtain various accompanying effects such as variable speed of recording.</p> |
