Patent ID: 6541092
Filing Date: 2003-04-01
Classification: C09B,G11B,Y10T

Abstract:
An optical information storage medium comprising:a transparent pregrooved substrate; a dye recording layer provided on the substrate, at which information can be recorded by irradiation with a laser; and a light-reflective layer provided on the dye recording layer, which is made of a metal, wherein the dye recording layer comprises a dye A, which has a maximum absorption wavelength in a range from 400 to 700 nm, and a dye B, which has a maximum absorption wavelength 3 to 50 nm longer than the maximum absorption wavelength of the dye A, and a sensitivity ratio Q of the dye A to the dye B, which is represented by the following equation, is from 0.20 to 0.55: Q=(PAâˆ’PB)/PA where PA represents an optimum recording power for the dye A and PB represents an optimum recording power for the dye B.