CD-Compatible Write-Once Disc With High Refrectivity

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Abstract
A high reflectivity write-once disc with specifications satisfying the CD Standard has been developed. The new disc realizes a reflectivity greater than 70% and employs a simple configuration with a substrate, photo-absorption layer, reflection layer and protection layer. Since there is no space between layers, high durability is assured. Recording is performed when the substrate resin expands and intrudes into the photo-absorption layer, mixing with the decomposed dye materials. The specifications of the new disc are completely compatible with the current CD Standard, while the disc's simple configuration realizes low cost processability.

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