DE2740835

The record carrier according to the invention comprises a substrate on which an electrode is provided which, on the side remote from the substrate, has a low-ohmic photoconductive layer which is covered with a second transparent electrode which is provided wihh a thermoplastic layer. For storing inf...

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Bibliographic Details
Main Authors SCHMITT, HANS. DR., 2080 PINNEBERG, DE, RABE, GERT, (GRAD.), KILLAT, ULRICH. DR., 2000 HAMBURG, DE
Format Patent
LanguageEnglish
Published 27.06.1985
Edition3
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:The record carrier according to the invention comprises a substrate on which an electrode is provided which, on the side remote from the substrate, has a low-ohmic photoconductive layer which is covered with a second transparent electrode which is provided wihh a thermoplastic layer. For storing information the electrodes are connected to a voltage source and the thermoplastic layer is charged electrostatically and exposed in known manner. Upon exposure of an area of the thermoplastic layer, the light will fall through the transparent electrode on the low-ohmic photoconductive layer. As a result of the current passage, Joulean heat is produced which heats the thermoplastic layer in the place of the exposed area and softens it thereby deforming the layer by electrostatic forces in accordance with the charge. The thermoplastic layer may, in known manner, also have photoconductive properties or be provided with a further photoconductive layer.
Bibliography:Application Number: DE19772740835