| 摘要 |
PURPOSE:To improve dependency on wavelength of recording sensitivity when phthalocyanine pigment is used by a method wherein a mixture of phthalocyanine, naphthalocyanine phthalo/naphthalocyanine compound of a specific structure is used for a recording layer. CONSTITUTION:A compound to be used for a recording film layer is given by the formula as given right. In the formula A<1> to A<4> respectively independently represent a non-substituted or (X<1>)m substituted benzene ring, or non- substituted or (X<2>)n substituted naphthalene ring. Then, a mixture of five kinds of compounds wherein number of those benzene rings/number of those naphthalene rings is 4/0 to 0/4, is used. m, n represent 1 or 2, and X<1> represents -OCH2 CF3, -OCH2(CF2)H, -OCH2(CF3)2, and -OCH2(CF2)4H. X<2> represents -OCH2CF3, -OCH2(CF2)H, -OCH2(CF2)2, -OCH2(CF2)4H, -tert- C5H11, and H. M represents Si or Ge. Z represents -OPR1R2, -OP(=0) R3R4, and R<1> to R<4> represents a non- substituted or a substituted alkyl, aryl, alkoxy, and aryloxy radical. |
