OPTICAL RECORDING MEDIUM AND ITS RECORDING METHOD

PROBLEM TO BE SOLVED: To realize a write-once read-multiple (WORM) optical recording medium made from organic material in an area of wavelength of a blue laser or less, especially even in the wavelength area of proximity of 405nm, to realize a WORM optical recording medium made from the organic material even on a shallow groove substrate having excellent transferrability, and to realize a WORM optical recording medium having small change in recording characteristics such as recording sensitivity, a modulation degree, jitter, and error ratio, reflection ratio, etc., against fluctuation of a recording and reproducing wavelength. SOLUTION: The optical recording medium is characterized in that it has a structure of at least an organic compound layer whose main absorption zone at unrecorded time remains at long wavelength side against the recording and reproducing wavelength, an optical interference layer, and an optical absorption layer having an optical absorption function are sequentially laminated on a substrate, and recording and reproduction are performed from the substrate side. COPYRIGHT: (C)2004,JPO