Patent ID: 7361449

Claim:
An optical information recording medium comprising: a disc-shaped substrate, a surface of which has a pre-groove having a track pitch of 0.2 to 0.8 μm; and a recording layer comprising a recording dye represented by either of the following formulae (V) or (VI) on the surface of the substrate having the pre-groove: wherein R 1 and R 2 each independently represent a substituent, p and q are each an integer of 0 to 3, m represents a number of valence bonds between 2 to 4, and when m=2 V is selected from the group consisting of a 2,3-naphthylene group, a 1,5-naphthylene group, a 3,4-thiophenylene group, a 5,6-benzthiazolylene group, and a 2,6-pyridinylene group each of which may have a substituent; when m=3 V is selected from the group consisting of a benzene-1,3,5-triyl group and a 2,4,6-pyridinylene group each of which may have a substituent; and when m=4 V is a benzene-1,2,4,5-tetrayl group which may have a substituent, wherein R 1 , R 2 , p, q, V and m represent the same definitions as those of R 1 , R 2 , p, q, V and m in formula (V), respectively.