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US 5,352,551 AGranted
Process for storing information with high storage density
AssigneeCiba-Geigy Corporation
InventorsJin Mizuguchi, Alain C. Rochat, Gerald Giller
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AssigneeCiba-Geigy Corporation
InventorsJin Mizuguchi, Alain C. Rochat, Gerald Giller
Estimating the term…
A process for storing information in an organic recording layer which, when treated locally with an organic solvent in accordance with the input of information, is able to change its absorption spectrum and/or its photoconductivity such that information can be produced or stored at the treated areas of said layer, wherein the organic solvent is solid at room temperature and is present in the recording layer, or by decomposition of a solid organic precursor which is present in the recording layer, and said solvent is vaporized or melts by the action of laser beams in accordance with the input of information, or said precursor is decomposed by the action of laser beams in accordance with the input of information. The stored information can be read out with a photodetector in the visible or near NIR range or with a built-in electrode system.
A process for storing information in an organic recording layer, which comprises irradiating the organic recording layer with a laser beam, wherein the organic recording layer consists essentially of an organic recording material and a solid organic solvent or a solid organic precursor, and wherein the absorption spectrum and/or photoconductivity of said organic recording material changes in response to a liquid or vaporized organic solvent which is formed by the decomposition, melting and/or vaporization of the solid organic solvent or the solid organic precursor, which decomposition, melting and/or vaporization is effected by the irradiation of the organic recording layer with the laser beam.
Dependencies are inferred from the claim text.