JPS60160026A - Magnetic recording medium - Google Patents

Abstract

PURPOSE:To improve the durability of a magnetic recording medium by forming lubricating layers which are different from each other in material or thickness on the 1st and the 2nd sides of the medium so as to realize the most suitable lubricating conditions. CONSTITUTION:Magnetic layers 3 are formed on both sides of the nonmagnetic substrate 2 of a magnetic recording medium 1 for one-side recording. A lubricating layer 4 of 200-300Angstrom thickness is formed on the magnetic layer 3 not concerned with the recording and reproduction of data by spin-coating oleic acid. The layer 4 contacts with a head load pad 6. A lubricating layer 5 of 50-100Angstrom thickness is formed on the magnetic layer 3 concerned with the recording and reproduction of data by spin-coating oleic acid. The layer 5 contacts with a magnetic head 7. Since the layer 4 contacting with the pad 6 is thick, satisfactory durability is provided, and since the layer 5 contacting with the head 7 is thin, superior recording and reproducing characteristics are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in the structure of a magnetic recording medium used in a magnetic disk device.

[Technical background of the invention and its problems]

BACKGROUND ART In recent years, magnetic recording media for perpendicular magnetic recording used in magnetic disk devices include those in which a cobalt film is formed on a magnetic layer by sputtering. In this way, a magnetic recording medium with a magnetic layer formed by sputtering rotates while the magnetic head and herad load pad are in contact with each other.
Since data is recorded and reproduced while the magnetic head and Herad load pad are sliding, a lubricant is applied to form a lubricant layer to protect the magnetic layer.

In magnetic recording media for single-sided recording, the lubricating layer on the surface that comes into contact with the head load pad needs to be thicker than a certain value, depending on the durability of the head load pad and the durability of the surface of the magnetic recording medium. shall be. On the other hand, in order to improve the electrical characteristics for recording and reproducing data by the magnetic head, it is necessary to keep the thickness of the lubricant layer below a predetermined value. The lower limit of the thickness of the lubricant layer formed on the surface of the VC@C air distribution medium is regulated by the surface with which the head load pad comes into contact, and the thickness of the lubricant layer formed on the surface of the VC@C air distribution medium is determined by the lower limit of the thickness of the lubricant layer formed on the surface of the VC@C air distribution medium. If the shapes and support methods of the magnetic head and the second magnetic head that contact the second surface are different, it is necessary to form the lubricant layer with a different thickness on the first and second surfaces. .

However, in conventional magnetic recording media, the lubricating layers on both sides have the same thickness, and do not satisfy the above-mentioned thickness condition.

[Purpose of the invention]

The present invention has been made to eliminate these conventional drawbacks, and an object of the present invention is to provide a magnetic recording medium that achieves optimal thermal conditions and has improved durability.

[Summary of the invention]

The magnetic recording medium of the present invention has a first magnetic recording medium formed on the first surface.
The lubricant layer and the second lubricant layer formed on the second surface are different in material or thickness.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention. In FIG. 1, (1) is a magnetic recording medium for single-sided recording. (2
) is a non-magnetic substrate that is the core of the magnetic recording medium (1). On both sides of this non-magnetic substrate (2), magnetic layers (3) of cobalt oxide are formed by sputtering. A lubricating layer (4) with a thickness of 200 to 300 angstroms is formed on the magnetic layer (3) by spin-coding oil/acid.Also, on the magnetic layer (3) on the data recording/reproducing side A lubricating layer with a thickness of 50 to 100 angstroms is formed by using oleic acid as a spin cord. (This is the head load pad that suppresses the force.

According to a magnetic recording medium on which such a lubricating layer is formed,
What is the thickness of the lubrication layer that the head load pad comes into contact with?Also, the thickness of the lubrication layer that the magnetic/magnetic head comes into contact with.

Since it is formed thin, it is possible to improve the electrical characteristics for recording and reproducing data by the magnetic head.

In the embodiments described above, the same lubricant was used to form the lubricant layers on both sides, but they may be formed using different lubricants. In addition, as shown in Figure 2, two types of lubricants with a predetermined durability are used to form a lubricant layer (
8) and (9) may also be formed. It goes without saying that the above-described lubricating layer can be applied not only to magnetic recording media for single-sided recording but also for forming lubricating layers in magnetic recording media for double-sided recording.

〔Effect of the invention〕

According to the present invention, it is possible to provide a magnetic recording medium that has overall durability, has good electrical characteristics during data recording and reproduction, and can be stabilized.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing one embodiment of the invention, and FIG. 2 is a diagram showing another embodiment of the invention. 1...Magnetic recording medium 2...Nonmagnetic substrate 3...Magnetic layer 4.5, 8.9...Lubricant layer 6...・Head load pad 7 ・・・・・・Magnetic head

Claims (3)

[Claims] (1) Magnetic recording characterized in that the first lubricant layer formed on the first surface and the second lubricant layer formed on the second surface are different in material and line thickness. Medium. (2) The thickness of the first lubricant layer formed on the surface of the tlcl that the magnetic head contacts is also the same as the thickness tX of the second lubricant layer formed on the second surface that the head radar pad contacts. The magnetic recording medium according to claim 1, wherein the magnetic recording medium has a thick thickness. (3) The lubricating layer of #Il formed on the first surface with which the first magnetic head contacts and the second magnetic head #I
Claim 1J characterized in that the thickness of the lubricating layer of 2 mK and 11E2 is different.
12. The magnetic recording medium according to 11.