Patent ID: 8067080

Claim:
An optical recording medium comprising, in sequence: a first substrate; a first information recording layer; an intermediate layer; a second information recording layer; and a second substrate having wobble convex portions on a surface of the second substrate facing the second information recording layer, wherein information is recorded on or reproduced from the first information recording layer and second information recording layer by irradiation with a laser beam from a side of the information recording layer facing the first substrate, wherein the second information recording layer includes, over the second substrate, a light reflective layer, a dye recording layer, and an inorganic protective layer, wherein the inorganic protective layer has a thickness of 3 nm to 40 nm, and wherein the dye recording layer includes a cyanine compound expressed by General Formula (I) and a squarylium compound expressed by General Formula (II): in which, ring A and ring B are each a benzene ring or a naphthalene ring that may have substituent(s); among R 1 to R 4 , adjacent two groups of R 1 and R 2 , R 2 and R 4 , or R 3 and R 4 are a benzyl group or all of R 1 to R 4 are each a benzyl group, and in the former case, the other two groups of R 1 to R 4 are each an alkyl group having 1 to 4 carbon atoms or connect to each other to form a three- to six-membered ring; Y 1 and Y 2 are each independently an organic group with a carbon number of 1 to 30; An m- represents an anion with a valency of “m”, and the “m” is an integer of 1 or 2, “p” is a factor for neutralization: in which, R 5 represents a hydrogen atom, an alkyl group that may have substituent(s), an aralkyl group that may have substituent(s), or an aryl group that may have substituent(s); R 6 represents a halogen atom, an alkyl group that may have substituent(s), an aralkyl group that may have substituent(s), an aryl group that may have substituent(s), a nitro group, a cyano group, or an alkoxy group that may have substituent(s); “s” represents an integer of 0 to 4, when “s” represents an integer of 2 to 4, the respective R 6 s may be identical or different each other, and adjacent two R 6 s may bind with adjacent two carbon atoms to form an aromatic ring that may have substituent(s); R 7 and R 8 are each a group selected independently from the group consisting of alkyl groups that may have substituent(s), aralkyl groups that may have substituent(s), aryl groups that may have substituent(s), and heterocyclic groups that may have substituent(s); R 9 and R 10 are each a group selected independently from the group consisting of alkyl groups that may have substituent(s), aralkyl groups that may have substituent(s), and aryl groups that may have substituent(s), R 9 and R 10 may bind to each other to form a cycloaliphatic hydrocarbon ring or a heterocyclic ring; Q represents a metal atom capable of coordinating; “t” is an integer of 2 or 3.