Recording layer for optical information recording medium and optical information recording medium

Abstract

The invention provides a recording layer for optical information recording medium with excellent recording characteristics and an optical information recording medium with the recording layer. The recording layer for recording by laser irradiation comprises: oxide containing Mn. The atomic ratio of the Mn to all the metal elements of the oxide in the recording layer is below 80 atom% and the recording layer does not contain metal Mn.

Description

technical field [0001] The present invention relates to a recording layer for an optical information recording medium and an optical information recording medium. Background technique [0002] Optical information recording media (optical discs) are represented by optical discs such as CD, DVD, and BD, and are roughly classified into three types: read-only type, write-once type, and rewritable type according to the recording / reproducing method. Among them, the recording methods of write-once optical discs are roughly classified into the following methods: a phase-change method in which a recording layer is phase-transformed; an interlayer reaction method in which a plurality of recording layers are reacted; and a decomposition method in which a compound constituting the recording layer is decomposed ; An opening method in which recording marks such as holes and pits are locally formed on the recording layer. [0003] In the phase change method, it is proposed to use a materi...

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Problems solved by technology

[0017] As the recording material disclosed in the above-mentioned prior art, it is difficult to satisfy these requirements with the recording material alone.

[0018] In the phase change method, the reflectivity of the recording layer alone is low, so the reflectivity in the state of the disc should be increased, and a reflective film is required, and in order to increase the degree of modulation, it is necessary to install ZnS-SiO on the upper and lower sides of the recording layer 2 Equal dielectric layer (dielectric film), the number of layers constituting the optical di...

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