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US 2006/0077877 A1Published application
Optical recording medium
AssigneeTDK Corporation
InventorsTakuya Tsukagoshi, Koji Mishima, Daisuke Yoshitoku
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Abstract
A multilayer optical recording medium comprises four recording layers including an L0 layer, an L1 layer, an L2 layer, and L3 layer laminated between a substrate and an optically transparent cover layer and optically transparent spacer layers each provided between the recording layers. The L2 layer has the negative dependence of the reflectance on the incident angle of a laser light beam for reproduction. Crosstalk can be effectively reduced by the relation between the configuration of the respective recording layers and the crosstalk.
Claims18
An optical recording medium comprising:
- a substrate;
- an optically transparent cover layer;
- at least three recording layers including an L0 layer, an L1 layer, and an L2 layer provided between the substrate and the optically transparent cover layer, the recording layers laminated in this order from the substrates side;
- and
- optically transparent spacer layers each provided between the recording layers, wherein
- at least one recoding layer from among the recording layers except the L0 layer has a negative dependence of the reflectance on an incident angle of a laser light beam for reproduction.
3 more elements
Dependencies are inferred from the claim text.