Optical recording medium and optical recording-reproducing...

Dynamic information storage or retrieval – Storage medium structure – Optical track structure

Reexamination Certificate

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C369S053100

Reexamination Certificate

active

10758481

ABSTRACT:
An optical recording medium includes an optical recording layer, a separating layer formed on a reproducing light incident side of the optical recording layer, and a phase-change reproducing layer formed on the reproducing light incident side of the separating layer, absorbance of which phase-change reproducing layer is changed depending on whether a state of the optical recording layer is a recording mark or a space. A transfer portion to which a state of the optical recording layer is transferred is formed in a portion having high absorbance of the phase-change reproducing layer by irradiation with reproducing light, while a portion of the phase-change reproducing layer other than the transfer portion is kept in a state optically differing from the transfer portion.

REFERENCES:
patent: 6122228 (2000-09-01), Shimazaki et al.
patent: 6187406 (2001-02-01), Ichihara et al.
patent: 7142496 (2006-11-01), Miyagawa et al.
patent: 9-134546 (1997-05-01), None
patent: 10-40576 (1998-02-01), None

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