| 摘要 |
<p>In an optical recording medium 100 having two recording layers of a first recording layer 102 and a second recording layer 105, the second recording layer 105 contains metallized azo dyes represented by the following general formula (I) or (II), and recording characteristics of the second recording layer 105 are improved by having optical density of 1.3 times as large as, or 1.3 times greater than, that of a dye contained in the first recording layer 102.
(In this regard, rings A1 and A2 are nitrogen-containing heteroaromatic rings, rings B1 and B2 are aromatic rings, and X is alkyl group substituted by at least two fluorine atoms.)</p> |
