| 摘要 |
An optical recording medium is provided which has excellent jitter characteristics and satisfactory recording/reproducing characteristics and is capable of extremely high-density recording. The optical recording medium 20 comprises a substrate 21 having a guide groove and the following layers formed on the substrate 21 in the following order: a layer 23 having a light-reflecting function, a recording layer 22 containing a specific porphyrin compound as a main component, and a cover layer 24 capable of transmitting a recording/reproducing light entering the recording layer 22, wherein when a portion of the guide groove at a side far from a surface where a recording/reproducing light beam enters the cover layer 24, is represented as a recording groove portion, then a recording pit portion formed in the recording groove portion, has a higher reflective optical intensity than the recording groove portion in an unrecorded state.
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