Patent ID: 6331385
Filing Date: 2001-12-18
Classification: G03C

Abstract:
A silver halide photographic material comprising at least one silver halide emulsion comprising silver halide tabular grains having associated therewith at least two dye layers comprising(a) an inner dye layer adjacent to the s niver halide grain and comprising at least one dye that is capable of spectrally sensitizing silver halide and(b) an outer dye layer adjacent to the inner dye layer and comprising at least one dye which is a cyanine dye, merocyanine dye, aiylidene dye, complex cyanine dye, complex merocyanine dye, homopolar cyanine dye, hemicyanine dye, styril dye, hemioxonol dye, oxonol dye, anthraquinone dye, tiphenylmethane dye, azo dye, azomethine dye, or coumarin dye;wherein the dye layers are held together by non-covalent forces or by in situ bond formation; the outer dye layer adsorbs light at equal or higher energy than the inner dye layer, and the energy emission wavelength of the outer dye layer overlaps with the energy absorption wavelength of the inner dye layer.