Recordable digital video disc

Details Recordable digital video disc Recordable digital video disc

2006-01-10

2006-01-10

Dye, Rena (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

C428S064100, C428S064200, C428S064800, C428S064900, C369S288000, C369S277000, C369S272100

Reexamination Certificate

active

06984434

ABSTRACT:
A recordable digital video disc preferably employable for information recording method using a laser beam having a wavelength of 600–700 nm, composed of a transparent disc substrate provided with a spiral pregroove, a recording dye layer placed in the pregroove, and a light-reflecting layer, arranged in order, wherein the recording dye layer has a thickness in the range of 40% to 90% of a thickness corresponding to an optical path which gives the first minimum reflectance, the optical path giving the first minimum reflectance being determined from a reflectance curve which is prepared using recordable digital video discs composed of the same disc substrate, the same recording dye layer having varying thickness, and the same light-reflecting layer.

REFERENCES:
patent: 5952073 (1999-09-01), Hurditch et al.
patent: 0 747 895 (1996-12-01), None

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