Data recording medium

Details Data recording medium Data recording medium

1995-11-17

1997-09-23

Hindi, Nabil

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

G11B 724

Patent

active

056712111

ABSTRACT:
A data recording medium having a well-recognizable recording layer which reversibly changes in degree of light scattering when externally stimulated. One embodiment of the data recording medium of the present invention comprises (a) a visible data recording layer, the degree of light scattering of which reversibly changes when externally stimulated, (b) a transparent substrate layer, (c) a low refractive layer having a lower refractive index than the transparent substrate layer, (d) a colored substrate layer and (e) a magnetic recording layer, laminated in this order. Another embodiment of the data recording medium comprises (a) a visible data recording layer, (b) a first transparent substrate layer, (c) a low refractive layer, (d) a second transparent substrate layer and (e) a colored magnetic recording layer, laminated in this order. Still another embodiment of the data recording medium comprises (a) a visible data recording layer, (b) a light reflective layer, (c) a magnetic recording layer and (d) a substrate layer. In the data recording medium, the visible data recording layer preferably comprises a liquid crystal polymer. The recording layer may have a protective layer laminated thereon.

REFERENCES:
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Makromol Chem., 187, (1986), "Liquid crystalline elastomers based on liquid crystalline side group, main chain and combined polymers a)", Rudolf Zental, et al., pp. 1915-1926.
Makromel Chem., 179, (1978), "Model Considerations and Examples of Enantiotropic Liquid Crystalline Polymers", Heino Finkelmann et al., pp. 273-276.
Eur. Polym. J. vol. 18 (1982), "Thermotropic Liquid-Crystalline Polymers-VI" Valery P. Shibav et al., pp. 651-659.
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