Data storage medium having reflective particulate silver layer

Details Data storage medium having reflective particulate silver layer Data storage medium having reflective particulate silver layer

1980-07-14

1981-05-26

Schilling, Richard C.

Radiation imagery chemistry: process, composition, or product th

Imaged product

Deposited metal coating on image

430 9, 430229, 430246, 430346, 430414, 430416, 430616, 430945, 430964, 3461351, 428457, 428459, G03C 102, G03C 532, G01D 1524, G01D 1526

Patent

active

042699177

ABSTRACT:
A reflective laser recording and data storage medium, for direct reading after writing, formed from a photosensitive silver-halide emulsion wherein a surface latent image exposure on the recording area forms a depthwise gradient of silver nuclei. A single step negative silver diffusion transfer process is used to develop silver nuclei of the latent image and dissolve unexposed silver halide elsewhere, forming silver ion complexes. These complexes are transported by diffusion transfer to the developing silver nuclei sites where silver is precipitated and adsorbed to form a high concentration of non-filamentary particles at a surface of a low melting temperature dielectric colloid matrix which is highly reflective of light and electrically non-conducting.

REFERENCES:
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patent: 3253923 (1966-05-01), Glover et al.
patent: 3464822 (1969-09-01), Blake
patent: 3578450 (1971-05-01), Miller et al.
patent: 3705804 (1972-12-01), Farney et al.
patent: 3889272 (1975-06-01), Lou
patent: 3911444 (1975-10-01), Lou et al.

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