OPTICAL DATA RECORDING MEDIUM AND RECORDING AND REPRODUCING DEVICE Russian patent published in 2013 - IPC G11B7/24

Abstract RU 2491660 C2

FIELD: information technology.

SUBSTANCE: in a version of the invention, the medium has a substrate, information layers which are laminated on the substrate, intermediate layers and a protective layer (107) which is provided on the information layer. The width of the change in thickness from the surface of the protective layer to the corresponding information layers is +3 mcm or less, relative the average value of said thickness in a region with radius of 23-24 mm from the centre of the data recording medium.

EFFECT: reduced effect of interlayer crosstalk and eliminating back focus problems.

11 cl, 8 dwg

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RU 2 491 660 C2

Authors

Tsukuda Masakhiko

Tomijama Morio

Dates

2013-08-27—Published

2009-07-27—Filed