Optical information recording medium, and substrate and...

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

Reexamination Certificate

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C369S275300, C369S288000

Reexamination Certificate

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07072285

ABSTRACT:
In an optical disk including at least a rewritable phase change material and comprising a recording layer having a reflectivity of more than 15%, an address output value as an address pit signal component occupying in a reproduced signal in a non recording state is prescribed to be 0.18 though 0.27 or a numerical aperture of an address pit signal occupying in a reproduced signal in a non recording state is prescribed to be more than 0.3.

REFERENCES:
patent: 6343062 (2002-01-01), Furukawa et al.
patent: 6582793 (2003-06-01), Kondo
patent: 6744725 (2004-06-01), Kondo
patent: 6925050 (2005-08-01), Kondo
patent: 6930977 (2005-08-01), Kondo et al.

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