Optical magnetic recording medium

A magneto-optical recording and medium technology, applied in magnetic recording, magnetic recording, data recording, etc., can solve the problems of magnetic property changes, low rigidity of aluminum substrate, and not recommending the use of proximity actuators, etc., to prevent oxidation and nitriding, Effect of Stabilizing Magnetic Properties
CN1582474AInactive Publication Date: 2005-02-16FUJITSU LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FUJITSU LTD
Publication Date
2005-02-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

An optical magnetic recording medium. Characterized in the it comprises a substrate and, formed thereon in the following order, a soft magnetic film, a protective film, a resin layer having a servopattern formed thereon, a reflective film, an under dielectric film, a recording layer, a upper dielectric film and a cover layer. An optical magnetic recording medium, characterized in that it comprises a substrate and, formed thereon in the following order, a soft magnetic film, a protective film, a resin layer having a servopattern formed thereon, a reflective film, an under dielectric film, a recording layer, a upper dielectric dielectric film and a cover layer.
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Description

technical field

[0001] The invention relates to a magneto-optical recording medium, in particular to a magneto-optical recording medium containing a soft magnetic film. Background technique

[0002] Many practical examples of magneto-optical recording media are formed by stacking recording layers, protective layers, etc. on a transparent substrate, and information is recorded and reproduced by light incident on the substrate side.

[0003] Miniaturization of track width and recording mark size is an exemplary way of increasing the recording density of magneto-optical recording media, for example, the spot size of a light beam irradiating the magneto-optical recording medium has been reduced. The numerical aperture NA of objective lenses currently used for magneto-optical recording media is about 0.55 to 0.6.

[0004] Usually, the relationship Φ=λ / 2NA is established, where Φ is the spot size, NA is the numerical aperture of the objective lens, and λ is the laser wavelength. ...

Claims

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