| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical recording material containing a cyanine compound in accordance with an optical recording medium which can cope with high speed recording. <P>SOLUTION: The optical recording material is used in the optical recording layer of the optical recording medium in which the layer is formed on a substrate and contains a compound expressed by formula (I) or formula (II) (the ring A and the ring B are each a benzene or naphthalene ring which can have a substituent; R1 is a 1-4C alkyl group; R2 and R3 are each a 1-4C alkyl group, a benzyl group, or a group forming a 3-4-membered ring by being connected; X is a hydrogen atom, a halogen atom, a 1-4C alkyl group, a phenyl group which can have a substituent, a benzyl group which can have a substituent, or a cyano group; Y1 and Y2 are independently an organic group; An<SP>m-</SP>is an m-valent anion; m is 1 or 2; and (p) is a coefficient keeping the charge neutral). <P>COPYRIGHT: (C)2003,JPO |
