| 摘要 |
PROBLEM TO BE SOLVED: To obtain an optical recording medium which is improved in preservation stability of recording and is reduced in a production cost. SOLUTION: The optical recording medium including a recording layer and reflection layer successively formed on a transparent substrate is the optical recording medium characterized in that its recording layer contains the cyanine dyestuff expressed by general formula (i) and a stabilizer and the reflection layer consists of silver or silver alloy. In the formula, Y1 , Y2 , Y3 , Y4 , Y5 , Y6 , Y7 , Y8 , Y9 , Y10 , Y11 and Y12 are selected from the group consisting of hydrogen, halogen, nitro and cyano group; R1 and R2 are, independently from each other, 3-8C alkyl groups; R3 is hydrogen or 1-3C alkyl group; X<-> is selected from the group consisting of ClO4 <-> , PF6 <-> , C6 H5 SO3 <-> and p-CH3 C5 H6 SO3 <-> , provided that when R3 is hydrogen, at least one among Y1 , Y2 , Y3 , Y4 , Y5 , Y6 , Y7 , Y8 , Y9 , Y10 , Y11 and Y12 is selected from the group consisting of halogen, nitro and cyano group. |
