| 摘要 |
PURPOSE:To enhance reflectivity or recording sensitivity and to stabilize the writing or reproduction of an optical signal, by forming an optical information recording medium by providing a recording layer containing an org. dye represented by a specific general formula to a substrate. CONSTITUTION:An org. dye represented by formula I (wherein R1 is a 1-6C alkyl group, an aralkyl group or a phenyl group, A is group represented by formula II, X is an anion such as perchlorate or iodide, Y is a 1-18C alkyl group, m is an integer of 1 or 2 and Z is a phenyl group, a hydroxyl group or a carboxyl group) is dissolved in a solvent to prepare a coating solution which is, in turn, applied to a substrate 1 such as plastic to provide a recording layer 2. The thickness of the recording layer 2 is pref. 30-500nm. Recording and reproduction are performed by condensing laser beam 3 to the recording layer 2 by a condensing lens in a spot form having a size of 0.8-1.5mum. |
