Sony Corporation

Nobutake Kagami

Michihiko Iida

Toshihiro Akimori

Yuko Nakamura

Yuichiro Doi

In a recording material, physical characteristic information of the recording medium, and more specifically, material information representing the material of the disc, is recorded. Accordingly, a recording apparatus and a reading apparatus easily and accurately determine the physical characteristics of the disc, thereby making it possible to provide suitable setting for performing an operation.

Recording medium, recording apparatus, and reading apparatus

A magneto-optical recording medium comprises, at least a transparent base plate, a dielectric layer formed on one major surface of the transparent base plate, and a recording magnetic layer formed over the dielectric layer. The dielectric layer may be a single-layer structure consisting of a dense dielectric film or may be a two-layer structure consisting of a porous dielectric film formed contiguously with the transparent base plate, and a dense dielectric film formed contiguously with the recording magnetic layer. The magneto-optical recording medium has high recording magnetic field sensitivity and excellent mechanical properties, and is capable of satisfactorily functioning for recording/reading operation on either a magnetic modulation recording system or an optical modulation recording system.

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Miyagi, Japan

Nobutake Kagami