SU1631596A1 - Magnetic disc - Google Patents

Abstract

The invention relates to the accumulation of information and can be used in magnetic disks. The purpose of the invention is to increase the magnetic recording density. The magnetic disk contains a rigid non-magnetic disk base 1, on each surface of which an intermediate layer 2 is placed, conjugated through the working layer 3 with a protective layer made of silicon oxide. In addition, each intermediate layer 2 is made of an amorphous alloy, and each working layer 3 is made of a nitrated cobalt-nickel alloy. 1 il.

Description

The invention relates to the accumulation of information, namely magnetic disks.

The aim of the invention is to increase the magnetic recording density.

The drawing shows the proposed magnetic disk.

The magnetic disk contains a rigid non-magnetic disk base 1, on each surface of which an intermediate layer 2 is placed, conjugated through the working layer 3 with a protective layer 4 made of silicon oxide. In this case, a rigid non-magnetic disk base 1 is made in the form of a disk made of aluminum or glass and has a diameter of 130 mm and a thickness of 1.9 mm.

In the magnetic disk, each intermediate layer 2 is made of an amorphous iron-zirconium alloy with a zirconium content of 11-45% by weight of the total mass of the alloy and has a thickness of 1.3 μm. Such an amorphous iron-zirconium alloy is a non-magnetic material, has high strength and reduces the effects of defects in a rigid non-magnetic disk base 1. If the zirconium content is less than 11 wt.%, The amorphous iron-zirconium alloy cannot be used for the intermediate layer 2, so as it is a ferromagnetic material. When the content of zirconium is more than 45 wt.%, An amorphous iron-zirconium alloy does not provide an intermediate layer 2 with a small number of defects.

In the magnetic disk, each working layer 3 is made of cobalt-nickel nitrated alloy and has a thickness of 500 A. Production of such a working layer 3 is carried out by sputtering from an alloy of cobalt-nickel in an argon-nitrogen atmosphere.

In the process of recording and reproducing, the working surface of the magnetic head is coupled with the protective layer 4 moved relative to it due to the rotation of the magnetic disk. In this case, the protective layer 4 prevents mechanical damage to the working layer 3, which ensures high

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low magnetic density. The placement of the working layer 3 on the intermediate layer 2 ensures its strong adhesion to the rigid non-magnetic disk base 1. At the same time, the intermediate layer 2 provides a high uniformity of the surface on which the working layer 3 is placed.

The use of the invention, together with an increase in magnetic recording density, ensures a high wear resistance of the magnetic disk and the simplicity of its manufacturing process.

Claims (1)

Claims of the Invention A magnetic disk containing a rigid non-magnetic disk base, on each surface of which an intermediate layer is placed, conjugated through a working layer with a protective layer made of silicon oxide, characterized in that, in order to increase the magnetic recording density, each intermediate layer is made of iron – zirconium amorphous alloy with a zirconium content of 11–45 wt.% of the total mass of the amorphous alloy, and each working layer — from a nitrated cobalt alloy — is nickel. h v .4 4V .4 h H.4 iNJ U. V. V. V. V h. h h. .. U. V.V. v L J ///////////////// Л , - 7- | and | - / .. - .-- f. f fimnrfm -taf t 1h f mi fammiftmnru (shA (t if i f i i 4N N4 V4 P4 4V 4N 4N XX P O S 4 N P4 P4 N NN