| abstract |
A blue laser-ready information recording medium improved in light stability and durability without impairment of record/playback characteristics is provided. n The information recording medium is an optical information recordingmediumhaving on a substrate a recording layer that permits recording of information by irradiation with laser light of 440 nm or below, and is a heat-mode information recording medium that has a recording layer containing a methine dye and an organic oxidant on a transparent disk-form substrate on which a pregroove having a track pitch of 0.2 to 0.5 µm is formed, and that on the pregroove-formed side of the substrate. |