Process for making a reflective data storage medium

Details Process for making a reflective data storage medium Process for making a reflective data storage medium

G - Physics

03

C

96/24

G03C 1/76 (2006.01) G02B 27/22 (2006.01) G03C 5/40 (2006.01) G03C 8/06 (2006.01) G11B 7/24 (2006.01) G11B 7/251 (2006.01)

Patent

CA 1137345

ABSTRACT A method for making a reflective data storage medium by creating a volume concentration gradient of silver precipitating nuclei on one surface of a silver halide emulsion coated photoplate. This volume concentration is then built up by a silver diffusion transfer nega- tive development using primarily solution physical development until the surface becomes reflective. Lastly, a thermal annealing step is used to increase reflectivity, recording sensitivity and produce a more uniform contrast ratio.

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