Quadrilayer optical draw medium

Details Quadrilayer optical draw medium Quadrilayer optical draw medium

1983-03-18

1985-11-05

Faber, Alan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369286, 369288, 3461351, G11B 700

Patent

active

045518289

ABSTRACT:
Quadrilayer optical DRAW medium which differs from prior trilayer optical DRAW media by having a thin triggering layer adjacent each of the optical spacer and light-absorbing layers. The triggering layer is a material, preferably organic, which when heated by a modulated laser-diode beam to a temperature less than the melting point of the optical spacer layer develops substantial vapor pressure or otherwise rapidly expands to implement or enhance the formation of pits or bubbles in the light-absorbing layer without disturbing the optical spacer layer or its function of protecting the substrate of the medium.

REFERENCES:
patent: 4195313 (1980-03-01), Bell et al.
patent: 4216501 (1980-08-01), Bell
patent: 4285056 (1981-08-01), Bell
patent: 4300227 (1981-11-01), Bell
patent: 4451914 (1984-05-01), La Budde
"Optical Disk Systems Emerge", by Bartolini et al., IEEE Spectrum, vol. 15, No. 8, Aug. 1978, pp. 20-28.
"Optical Recording with the Encapsulated Titanium Trilayer", by Bell et al., RCA Review, vol. 40, Sep. 1979, pp. 345-362.

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