Mitsubishi Chemical Corporation

Junichi Kozu

Yuzo Seo

Yoji Arita

Toshihiko Kuriyama

Ryuichi Yoshiyama

Mitsunori Mochida

The disclosure describes a magnetic recording medium having at least a magnetic layer, optionally by means of an under layer, on a non-magnetic substrate, wherein projections formed by irradiation of an energy beam and each having a height from 1 to 60 nm are provided at the number of 10,to 10,per 1 mm,on the surface of any one of the non-magnetic substrate, the under layer, the magnetic layer and the magnetic recording medium.

Magnetic recording medium, method of producing the same, and recording and reading-out method

The disclosure describes a magnetic recording medium having at least a magnetic layer, optionally by means of an under layer, on a non-magnetic substrate, wherein projections formed by irradiation of an energy beam and each having a height from 1 to 60 nm are provided at the number of 10.sup.2 to 10.sup.8 per 1 mm.sup.2 on the surface of any one of the non-magnetic substrate, the under layer, the magnetic layer and the magnetic recording medium.

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Yokohama, Japan

Junichi Kozu