| 摘要 |
PURPOSE:To enhance stabilities to heat and light and to reduce a deterioration in regeneration by incorporating a specific metal complex in any one of an undercoat layer, a recording layer, and a protective layer. CONSTITUTION:At least one selected from among metal complexes shown by formulas (I) and (II) is incorporated in at least one of an undercoat layer, a recording layer, and a protective layer in an optical information recording medium. In the formula, M represents a transition metal, such as nickel, platinum, and palladium; a pyridine ring or a pyrimidine ring may have a substituent, such as halogen, alkyl, and amino; and A represents a cation, such as a quaternary ammonium ion and a quaternary phosphonium ion. This optical information recording medium is capable of a regeneration by a long-wavelength light, such as a semiconductor laser, enhanced in heat stability and light stability, superior in shelf stability, and hardly deteriorated in regeneration, additionally forming a pit of favorable shape and making a high C/N ratio available. |
