Patent ID: 6716509
Filing Date: 2004-04-06
Classification: G11B,Y10T

Abstract:
An optical recording medium provided on a substrate with a recording layer, said recording layer comprising at least one kind of the trimethine-cyanine dye and an additive, wherein said the additive of recording layer selectively comprises the dye selected from the group consisting of the chemical compounds represented by the following general formula [10], [11], [12], and [13]: wherein â€œEDGâ€  represents an electron-donating substituted group; â€œR7â€  and â€œR8â€  are independently selected from substituted or unsubstitued alkyl, phenyl, benzyl, alkylphenyl or phenoxyalkyl group; â€œR9â€  and â€œR10â€  are independently selected from hydrogen atom, halogen atom, cyano or nitro group; â€œYâ€  is hydrogen atom, halogen atom or alkyl group; and â€œXâ€  is an anion selected from the group consisting of Fâˆ’, Clâˆ’, Brâˆ’, Iâˆ’, ClO4âˆ’, BF4âˆ’, PF6âˆ’, SbF6âˆ’, OTsâˆ’, OMsâˆ’, SCNâˆ’, alkylsulfonate and alkylcarboxylate.