Highly absorptive dye-containing underlayer for laser...

Details Highly absorptive dye-containing underlayer for laser... Highly absorptive dye-containing underlayer for laser...

G - Physics

11

B

352/32.4

G11B 7/00 (2006.01) G03C 8/06 (2006.01) G11B 7/251 (2006.01)

Patent

CA 1183949

ABSTRACT An underlayer for a laser recording and data storage medium with a light absorption characteristic suited to a recording laser. The underlayer is formed by creating a nuclei layer in a silver-halide photosensitive emulsion layer and then contacting the emulsion layer with a chromogenic reducing agent and a chromogenic dye coupler. The reflective layer may be formed prior to this step by subjecting the nuclei layer to a monobath having a silver-halide solvent and a silver reducing agent until a reflective surface layer of non- filamentary silver particles is formed, or after the step by chemical vapor deposition or sputtering of a reflective metal layer over the underlayer.

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