| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical information recording medium which enables information recording/reproduction to be effected by laser and exhibits superb recording properties. <P>SOLUTION: The optical information recording medium has a recording layer in which information is recorded by laser irradiation, formed on a substrate and the recording layer contains a coloring matter represented by formula (I) (wherein, A is an atomic group which forms a hetero ring together with a bonded carbon atom; B is an atomic group which forms a hetero ring or an aromatic ring together with a bonded carbon atom; L is -CO- or -SO2-; R<SP>1</SP>is a substituted or non-substituted alkyl group, a substituted or non-substituted aryl group or a substituted or non-substituted hetero ring group). <P>COPYRIGHT: (C)2005,JPO&NCIPI |
