Optical information recording medium

Details Optical information recording medium Optical information recording medium

2005-03-22

2005-03-22

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C428S064800, C430S270140

Reexamination Certificate

active

06869656

ABSTRACT:
An optical information recording medium including a substrate, a recording layer, and a cover layer in this order; wherein information is recorded or reproduced by irradiating a laser beam having an wavelength in the range of 380 to 500 nm on the recording layer through a lens having a numerical aperture NA of 0.7 or more; the recording layer includes an organic substance; and the extinction coefficient k of the recording layer is at least 0.1 and less than 0.3.

REFERENCES:
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patent: 20020197561 (2002-12-01), Berneth et al.
patent: 20030091931 (2003-05-01), Ogiso et al.
patent: 20030194646 (2003-10-01), Ogiso et al.
patent: 1 156 084 (2001-11-01), None
patent: 2000-228028 (2000-08-01), None
patent: 2001-307375 (2001-11-01), None
patent: WO 0147719 (2001-07-01), None

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