Tdk Electronics Company, Limited

Seitoku Saito

Toshiaki Izumi

Takayoshi Kobuke

Hiroshi Sugihara

Kazumasa Fukuda

Fumio Maruta

Kazuo Takada

Hideo Kobayashi

Minoru Kameya

A magnetic recording medium having a subbing metal layer formed by sputtering under a thin magnetic layer formed by vapor deposition possesses excellent magnetic properties and high surface hardness. The presence of the subbing layer improves the adhesion of the thin magnetic layer to the support.

Magnetic recording medium

A magnetic recording medium having a Mn-Al recording layer containing at least one of Fe, Co, and Ni and having an easy magnetization axis in the perpendicular direction to the layer. The magnetic recording layer can be formed at a high speed by employing magnetron sputtering.

A magnetic recording medium comprises a magnetic alloy layer on a substrate wherein said magnetic alloy layer is made of 70-90 wt. % of Co and 30-10 wt. % of at least one of Si, Sb, Li, V, Ta, Ge and Pt and a magnetization axis of said magnetic alloy is substantially vertical to said layer.

A magnetic recording medium has plural magnetic layers on a non-magnetic substrate. The magnetic particles are orientated in substantially the same tilt direction for major axes of the particles in each magnetic layer and in cross tilt directions for major axes of the particles in the adjacent magnetic layers.

A magnetic recording medium comprises cobalt as a main component and at least one of zinc, rhodium and iridium as an additional component of an alloy of a magnetic layer.

A magnetic recording medium obtained by coating a magnetic metallic powder with a binder on a non-magnetic substrate, wherein said magnetic metallic powder is mainly made of acicular particles obtained by a dry reduction process and said magnetic recording medium has a residual magnetic flux density of greater than 2,600 gauss, a coercive force of 1,300 to 1,800 Oe, a thickness of a magnetic layer of 1.5 to 3.5 .mu.m and a C/N ratio (carrier signal/noise level) in video band of greater than 4 dB of the C/N ratio of the standard video tape.

A thin metallic layer type magnetic recording medium having thin metallic layers in a structure comprises a layer in which a tilt angle of a metallic particle direction to the normal line to said substrate gradually increases depending upon an increase of a distance from said substrate; and a layer in which a tilt angle of a metallic particle direction to the normal line to said substrate gradually decreases depending upon an increase of a distance from said substrate.

Magnetic recording medium and apparatus for preparing the same

A magnetic recording medium having multi-layer structure of two or more thin metallic layers on a substrate. The orientations of metallic particles are different for each of said thin metallic layers.

Magnetic recording medium with stepwise orientation of deposited

A magnetic recording medium is prepared by a tilt vapor deposition of magnetic particles from a vapor thereof on a substrate running along a peripheral surface of a cylindrical can in vacuum wherein plural cans are used to deposit said magnetic particles at substantially the same tilt angle on each of said cans.

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Tokyo, Japan

Seitoku Saito