JPH1116158A - Magnetic recording medium and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a magnetic recording medium suitable for a magnetic disk device capable of coping with high density recording, to prevent the attraction of a magnetic head without providing the magnetic disk device with a particular mechanism and to reduce the cost by providing the landing area part of the magnetic head forming ruggedness in the outer circumferential part of a data recording area part which is smooth in surface roughness. SOLUTION: This magnetic disk 1 is suitable for a magnetic disk device capable of coping with high density magnetic recording and since a magnetic head is designed in low floating at a CSS control time, the data recording area 3 of a disk main body 2 is very smooth. The landing area part 5 of the magnetic head is provided in the outer circumferential part of the data recording area part 3 of the disk main body 2. In this landing area part 5 a ragged part 6 is formed in an annular shape along the whole circumference on a prescribed circumference by a laser. Consequently, it is not necessary to provide an expensive landing mechanism in particular and the attraction of the magnetic head at the landing time can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording medium, such as a magnetic disk, for use in a magnetic recording device such as a magnetic disk device for recording and reproducing information data magnetically.

[0002]

2. Description of the Related Art In general, a magnetic disk used in a magnetic disk device is mounted on a spindle of a rotating shaft of the device, and a landing area for landing a magnetic head on the magnetic disk, that is, after a write or read operation is completed. A landing area is provided for placing the magnetic head on standby.

[0003] In particular, in the case of a magnetic disk device adapted for high-density magnetic recording, the magnetic disk employed has a smooth surface roughness and a contact start and stop (CSS) control. Sometimes the height of the unevenness can be easily controlled by laser. The CSS control is a control method in which the magnetic head is kept in contact while the magnetic disk is stopped, and when the magnetic disk is rotated, the magnetic head is levitated by utilizing an airflow accompanying the rotation.

Conventionally, this type of magnetic recording medium has been disclosed in
There is one described in Japanese Patent Application Laid-Open No. 2-256215.

FIG. 3 schematically shows a part of the magnetic recording medium described in this publication. In this case, in order to prevent the magnetic head from sticking to the disk body 11 at the time of landing, the disk body 11 of the magnetic disk 10 has a rough surface with a tape texture.

The inner periphery of the disk main body 11 is a CSS control area 12, and the outer part is a data recording area 1 for writing or reading information data.
It is 3.

In this case, if the magnetic head moves outside the CSS control area 12 on the inner periphery, there is a disadvantage that the magnetic head is attracted to the data area 13. A special mechanism (not shown) for landing the head to prevent suction is provided, and the magnetic head is held in the CSS control area 12.

[0008]

The magnetic recording medium disclosed in the publication shown in FIG. 3 has the following problems to be improved.

First, in the case of a magnetic disk compatible with high-density recording, the surface roughness of the data area 13 for writing or reading is very smooth. Therefore, the magnetic head is likely to be attracted by the magnetic head when the magnetic head is assembled and mounted on the magnetic disk device or when the magnetic head is landed on the magnetic disk.

On the other hand, since a complicated mechanism for landing the magnetic head is specially provided in a portion other than the data area portion 13, there is a problem that the manufacturing cost is extremely increased.

Therefore, an object of the present invention is to provide a magnetic disk drive suitable for high-density recording having a data area with a very smooth surface roughness, and to prevent the magnetic head from being attracted without providing a special mechanism. Another object of the present invention is to provide a low-cost magnetic recording medium that is effective for a computer.

[0012]

A magnetic recording medium according to the present invention is provided with a landing area for a magnetic head for performing CSS control, wherein the landing area is a data recording medium having a flat surface roughness. The unevenness is provided on the outer peripheral portion of the recording area.

In this case, a CSS control area is provided on the inner periphery of the medium, and the data recording area is provided outside the CSS control area. When the medium is a magnetic disk, the landing area is provided over the entire circumference of a predetermined circumference on the outer circumference of the data recording area.

According to the method of manufacturing a magnetic recording medium of the present invention, a landing area for landing a magnetic head is formed on the outer periphery of a data recording area having a flat surface roughness by a laser. I do.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a magnetic disk which is an embodiment of a magnetic recording medium according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a configuration diagram showing a part of a magnetic disk 1 according to the present embodiment. In particular, in a magnetic disk device compatible with high-density magnetic recording, the magnetic head during CSS control is designed to have a low flying height, so that the data recording area 3 of the disk main body 2 is very smooth. In addition, since the surface roughness becomes smooth in terms of electromagnetic conversion characteristics, noise due to the magnetic disk 1 is reduced.

An inner peripheral portion of the disk main body 2 is formed as a CSS control region portion 4, and an outer peripheral portion outside the data region portion 3 is a landing region portion 5 of a magnetic head (not shown). The landing region 5 has a laser-shaped uneven portion 6 formed in an annular shape over a predetermined circumference over the entire circumference. As described above, by providing the uneven portion 6 by the laser in the landing region 5 of the magnetic head, it is possible to prevent the magnetic head from sticking at the time of landing.

FIG. 2 shows a magnetic disk 1 according to the present embodiment in which a landing area 4 formed by an uneven portion 6 according to the present embodiment is provided on an outer peripheral portion, and a conventional magnetic disk in which the surface roughness is developed by a tape texture. The figure shows the measurement results of the attraction characteristics when the magnetic head is landed on the disk 10.

As apparent from FIG. 2, the magnetic disk 10 of the conventional example having a low surface roughness has an increased adsorption characteristic,
The magnetic head is easily attracted. On the other hand, in the case of the magnetic disk 1 of the present embodiment, the attraction characteristics are remarkably reduced, and the magnetic head is hardly attracted to the landing area 5.

[0020]

As described above, in the magnetic recording medium and the manufacturing method according to the present invention, the annular band is provided with the concave and convex portion by the laser on the outer peripheral portion of the data recording region which is the landing region of the magnetic head. It is not necessary to provide an expensive landing mechanism in particular, and it is possible to provide a low-cost magnetic disk which is effective in preventing the magnetic head from being attracted.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a part of a magnetic disk as an embodiment of a magnetic recording medium according to the present invention.

FIG. 2 is a graph showing the correlation between the surface roughness and the adsorption characteristics of the magnetic disks of the embodiment and the conventional example.

FIG. 3 is a configuration diagram showing a part of a conventional magnetic disk.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic disk 2 Disk main body 3 Data recording area part 4 CSS control area part of inner peripheral part 5 Landing area part of outer peripheral part 6 Irregular part by laser

Claims (5)

[Claims] In a magnetic recording medium provided with a landing area for CSS control of a magnetic head, an outer peripheral portion of a data recording area having a flat surface roughness of the medium is provided.
A magnetic recording medium, wherein the landing area is provided with irregularities. 2. The magnetic recording medium according to claim 1, wherein a CSS control area is provided in an inner peripheral portion of the medium, and the data recording area is provided outside the CSS control area. recoding media. 3. The data recording medium according to claim 1, wherein the medium is a magnetic disk, and the landing area is provided with irregularities over the entire circumference of the data recording area. 3. The magnetic recording medium according to claim 1. 4. A method of manufacturing a magnetic recording medium having a landing area for performing CSS control of a magnetic head, comprising:
A method for manufacturing a magnetic recording medium, characterized in that the landing area for landing a magnetic head is formed by an uneven portion by laser. 5. The method according to claim 4, wherein when the medium is a magnetic disk, the landing area is formed into an annular band by a laser-induced uneven portion over the entire circumference of the data recording area. The manufacturing method of the magnetic recording medium according to the above.