Write-once information recording medium and coloring matter...

Details Write-once information recording medium and coloring matter... Write-once information recording medium and coloring matter...

2011-01-25

2011-01-25

Angebranndt, Martin J (Department: 1795)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C428S064400

Reexamination Certificate

active

07876666

ABSTRACT:
A write-once information recording medium comprises a transparent resin substrate having a concentrically or spirally shaped groove and a land formed thereon, and a recording firm formed on the groove and the land of the transparent resin substrate, a recording mark being formed on the medium by emission of a short wavelength laser light, the recording medium having an L to H feature in which a light reflectivity of the recording mark portion formed by the emission of the short wavelength laser light is higher than a light reflectivity obtained before the emission of the short wavelength laser light.

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