Optical recording medium

Details Optical recording medium Optical recording medium

2005-07-28

2010-11-02

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S094000, C369S283000, C369S286000, C369S288000

Reexamination Certificate

active

07826333

ABSTRACT:
An optical recording medium has a plurality of information layers which are placed between a substrate and an optically transparent cover layer with optically transparent spacer layers interposed between the information layers. From among the plurality of information layers, the information layer excluding the information layer arranged closest to the substrate and the information layer adjacent to the information layer closest to the substrate has asymmetrical reflection characteristics in which reflectance on the substrate side when light incident from the substrate side is reflected on the information layer toward the substrate side is lower than the reflectance on the cover layer side when light incident from the cover layer side is reflected on the information layer toward the cover layer side.

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Koji Mishima et al.; “Inorganic Write-Once Disc with Quadruple Recording Layers for Blu-ray Disc System”;Proc. Of SPIE; vol. 5069; pp. 90-97, 2003.
Noriyoshi Shida et al.; “The BD-Type Multi-Layer 100 GB ROM Disk using the Photopolymer Sheet”;ISOM 2003 Technical Digest; 2003; pp. 10-11.

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