Patent ID: 6368692
Filing Date: 2002-04-09
Classification: G11B,Y10T

Abstract:
An optical storage medium comprising:an optically transparent substrate having at least one major surface and having at least one grove formed in said at least one major surface; a storage layer on one of said at least one major surface of said substrate; a metal reflection layer on said storage layer; said storage layer containing from about 3 weight % to about 30 weight % of a metal complex compound described by the following general formula (I): wherein R1 and R2 are each independently an electrophilic substituent; M is a metal selected from the group consisting of a transition metal and a precious metal; said metal being capable of being in a trivalent oxidation state; said storage layer containing cyanine dye described by the following general formula (II): wherein Z âˆ’is an anion; R3 and R4 are each independently an alkenyl group; Y1 and Y2 are each independently selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, a halogen atom, a nitro group, a hydroxyl group, a â€”OCF3 group, a â€”R5OH group, a â€”R6COOR7 group, a â€”CH&boxH;CHâ€”CN group, a â€”COOR8 group, and a substituted or non-substituted fused benzene ring; said R5 and said R6 are each independently an alkylene group having from 1 to 9 carbon atoms; said R7 and said R8 are each independently a hydrogen atom or an alkyl group having from 1 to 9 carbon atoms; n is an integer from 1 to 4; m is an integer from 1 to 4; provided that when said R3 is equal to said R4then said (Y1)n is not equal to (Y2)m and provided that when said (Y1)n is equal to said (Y2)m then said R3 is not equal to said R4; and said cyanine dye absorbs light in the wavelength of between 500 nm and 700 nm.