JPH01102738A - Production of magnetic disk - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a method for manufacturing an SLI magnetic disk that can prevent adhesion to a head slider.

[Conventional technology]

It is one of the external storage devices for computers. The main components of the fixed magnetic disk drive are composed of a magnetic disk and a 6[Hent slider].

Figure 3 shows its conceptual diagram. (1) is a magnetic disk, (
8) d 11ki head slider% (9) is suspension shock/.

αQ is the spindle %01) is the rotation axis.

A magnetic disk (1) is a medium on which recorded information is written and holds it. The magnetic hent slider (8) is a 7tlt readout device that writes recorded information on a magnetic disk.
), and the suspension (9) is a spring that presses the magnetic head slider against the magnetic disk. The spindle α0 is a device that rotates the magnetic disk in the direction of the arrow.

In a fixed magnetic disk device, when recording information t-4F@@ to the magnetic disk (1) or reading it from the magnetic disk (1), the magnetic disk is rotated at high speed in the direction of the arrow C, for example, 3600 yen.
rpm). Due to the airflow generated by this rotation, the magnetic slider (8) floats while maintaining the gap between the magnetic disk surfaces and the magnetic disk surface on the basis of the air bearing principle.

That is, the pressing force of the suspension (9) and the pushing force of the air flow balance each other, and the magnetic hent slider (8) floats stably.

- When the magnetic disk device is not used, the rotation of the spindle α1 is stopped, and the magnetic hent slider (8) is pressed by the suspension 7 (9) and comes into contact with the magnetic disk.

4 and 5 are enlarged views of the vicinity of the magnetic hent slider in FIG. 3, respectively. Figure 4 shows when the magnetic disk device is operating (the magnetic disk is rotating), and Figure 5 shows when the magnetic disk device is stopped (the magnetic disk is stopped).
% is shown respectively.

[Problem that the invention seeks to solve]

Conventional magnetic disk drives are constructed as described above, and in recent years, as the demand for higher density has increased, progress has been made in miniaturizing the flying clearance of the magnetic slider.

This has inevitably led to improvements in the surface precision of magnetic disks and magnetic Hent sliders. In particular, the improvement in surface roughness of magnetic disks is remarkable, with the conventional roughness - λx 2000
A is now approaching Rmax 1008.

However, with the increase in surface roughness, another problem has arisen. The problem is that the magnetic hent slider and the magnetic disk stick together when the magnetic disk drive is stopped. If adhesion occurs, the magnetic slider will not be able to levitate even if the magnetic disk starts rotating, and the magnetic slider will be damaged. Even if the adsorption is released, the coefficient of dynamic friction between the magnetic disk and the magnetic hent slider is large, so when the magnetic disk starts rotating or stops,
There was a problem in that the magnetic hent slider scratched the surface of the magnetic disk.

The most effective method for reducing/reducing adhesion is to create irregularities on the surface of the magnetic disk to increase the surface roughness to some extent. Several solutions have been attempted for forming unevenness, but all of them have disadvantages. for example.

There is a method disclosed in Japanese Patent Application Laid-Open No. 61-230618, and a method which is commonly used is a method of adding texture to a substrate. A cross-sectional view of the magnetic disk at this time is shown in FIG. In the figure, (1) a base material such as a beam, (2) a hard film, (3) a magnetic recording medium, and (4
) is a protective film. A hard film (21) formed on a base material (1) is generally called a "substrate". Texture can be applied to a substrate by rotating the substrate and pressing an abrasive tape or the like onto it. , is a method of forming concentric grooves on the substrate. (A magnetic disk is completed by forming a magnetic recording medium (3) and a protective film (4) on the substrate using a spunter.) This method is effective in preventing adsorption. Although it is effective to some extent, it is not possible to arbitrarily manipulate the shape of the concavities and convexities (c) variations in the concavities and convexities occur within the same disk surface.

There are variations in the uneven shape of each disc.

Problems include lack of reproducibility, the need for delicate processing techniques, and long processing times.

The present invention has been made to solve the above-mentioned problems, and provides a method for manufacturing a magnetic disk that can form irregularities of any shape on a magnetic disk substrate inexpensively, quickly, and with good reproducibility. The purpose is to obtain a method.

[Means for solving problems]

A method for manufacturing a magnetic disk according to the present invention includes a step of pressing a stamp onto the surface of a hard film formed on a substrate and transferring the uneven shape of the stamp onto the hard film, and a step of transferring the uneven shape of the stamp onto the hard film. A step of forming a magnetic recording medium thereon is performed.

[Effect]

According to this invention, the unevenness of the magnetic disk substrate is obtained by transferring the unevenness of the stamp. Therefore, unevenness can be easily formed in a short time with good reproducibility.

Moreover, by changing the unevenness t of the stamp, it is possible to form unevenness by arbitrarily setting the unevenness such as a wide distribution, a pinch h IFe shape, etc.

[Embodiment] FIG. 1 is a sectional view showing a magnetic disk according to an embodiment of the present invention. In Figure 2, (11 is, for example, A! - a base material of heavy alloy, (2) is, for example, a hard film of N1-P plating film,
+3) v is a +3-Fe20° magnetic recording medium formed by sputtering, for example, and (4) is a protective film of, for example, C.

A hard film (21) formed on a base material m is usually called a "substrate" and is commercially available.Using this substrate, irregularities are formed as follows.

FIG. 2 is a sectional view showing the manufacturing process of a magnetic disk according to an embodiment of the present invention, which is similar to FIG.

(5) is a substrate, and (6) is an iSecix stamp.

The surface of the stamp is provided with irregularities having a surface roughness of Rmax 500 A.

Place the board (5) between the upper and lower stamps (6), and
51 was pressed to obtain a substrate for a magnetic disk. After that, a magnetic recording medium made of aFe20@ was sputtered (
3) was formed, and a protective film (4) of C was formed into a purple film, which was used as an actual magnetic disk.

The surface roughness of the magnetic disk was approximately 45 OA, and uniform unevenness was observed.

〔Effect of the invention〕

As described above, according to the present invention, a stamp is pressed onto the surface of a hard film formed on a substrate, the uneven shape of the stamp is transferred onto the hard film, and the uneven shape is transferred onto the hard film. As in the case of forming a film on a magnetic recording medium, unevenness can be formed quickly, inexpensively, and with good reproducibility using VC1.

Roughly speaking, by changing the unevenness of the stamp, the size distribution, pitch, and shape of the unevenness can be arbitrarily set, and uniform unevenness can be formed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a magnetic disk according to an embodiment of the present invention, FIG. 2 is a sectional view showing a manufacturing process of a magnetic disk according to an embodiment vC of the present invention, and FIG. 3 is a magnetic disk assembly f' The conceptual diagram shown in Figure 1g4 is a conceptual diagram showing the position of the magnetic slider when the magnetic disk is in operation, and Figure 5 is a conceptual diagram showing the position of the magnetic hent slider when the magnetic disk is stopped. and FIG. 6 are cross-sectional views showing a conventional magnetic disk. In Figure 2, C1) is the base material, (2) is the hard film, 13)
id magnetic recording medium, (4) Vi protective film, C5) is the substrate, and to) i is the stand bag. The same reference numerals in Figure 21 indicate the same percentages or portions corresponding to vi.

Claims (1)

[Claims] A step of pressing a stamp on the surface of a hard film formed on a substrate and transferring the uneven shape of the stamp onto the hard film, and a step of forming a magnetic recording medium on the hard film with the transferred uneven shape. A method of manufacturing a magnetic disk that is subjected to