JPS6247891A - Production of magnetic head - Google Patents

Abstract

PURPOSE:To improve recording/reproduction outputs with a magnetic head by using a buff to round the ridge of a magnetic head having contact with a magnetic disk and therefore preventing the injuries of the magnetic disk produced when it is started and stopped. CONSTITUTION:A magnetic head 3 is attached to a tool 4 and then pressed against a buff 5 which is rotating toward an arrow head 11 with addition of an extremely small amount of abrasives. Thus the ridges 7 and 6 are rounded fast by revolutions 9 and 10 of the tool 4. While a ridge 8 is also rounded by the revolutions of both directions like the ridges 6 and 7. A flat plane 1 is scarcely polished since the polishing speed of the plane 1 is low compared with the ridges 6-8. The abrasives and the waste stuck at the areas close to a gap 2 are thrown off by the revolutions of the buff 5 and the tool 4. The buff 5 uses soft materials. Many magnetic heads are attached on the plane 12 of the tool 4 and a shaft 13 is put into a hole 15 of a rotary tool 16 and pressed against the buff 5. Thus the revolving force of the buff 5 is transmitted to the tool 4. Then a bearing 14 of a tool 16 is rotated to secure the smooth revolution of the tool 6. Thus mass production is possible with magnetic heads.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for manufacturing a magnetic head.

[Summary of the invention]

The present invention provides a method for manufacturing a magnetic head in which, as shown in FIG. In cases such as the contact start/stop method where the magnetic head starts up while in contact with the magnetic disk, the magnetic head does not damage the magnetic disk, does not generate fine powder, and improves the lifespan and reliability of the magnetic head and magnetic disk. , and because it can be rolled up without damaging the gap of the magnetic head, it can bring good results to high-density recording.

[Conventional technology]

As a method of rounding the twill of a conventional magnetic head that comes into contact with the magnetic disk, as shown in Figure 6 described in Japanese Patent Publication No. 56-26907, a method of rounding the twill of a magnetic head, as shown in Fig. There has been known a method of lapping by making use of the elastic deformation of a curved surface and by reciprocating the head 3 in the direction of the arrow m19.

[Problems and Objects to be Solved by the Invention] However, in the above-mentioned prior art, the magnetic head 3 is brought into contact with the magnetic coating as shown in FIG. It was wrapping Aya in contact with. Therefore, as shown in Figure 7, a scratch n occurs at a depth of 1000 to 3000 A near the gap 2, and the scratch reaches Aya 8, making it difficult to start and stop the magnetic disk. This caused damage to the magnetic disk. This scratch η is caused by the magnetic head 3 as shown in FIG.
During lapping during reciprocating movement, abrasive particles and grinding debris generated by lapping become lumps 21.

This lump enters between the magnetic coating □□□ and the magnetic helad 3, and finally causes damage η to the gap 2 and the vicinity of the gap.
It can be inferred that this occurs. The reason why scratches tend to occur in the gap and the vicinity of the gap is thought to be that the abrasive particles and lumps described above tend to accumulate in the gap even in the Q gap of about 1 micron.

The occurrence of scratches on the Q twill near the gap and gear has two problems: it is a major hindrance to high-density recording, and it scratches the magnetic disk when the magnetic disk is started or stopped.

The present invention is intended to solve these problems, and its purpose is to round each twill that comes into contact with a magnetic disk without damaging the gap and the vicinity of the gap with the puff.

[Means for solving problems]

A magnetic head manufacturing method of the present invention for solving the above problems is characterized in that, in a flying slider type magnetic head, the twill that contacts the magnetic disk is rounded by a puff.

[Effect]

According to the above configuration of the present invention, the method of rounding each twill in contact with the magnetic disk utilizes the magnetic coating on the Thff1 disk or the elastic deformation of a surface having an equal 0 elasticity and surface degree, and the magnetic head is Using the method of lapping with reciprocating motion, each of the twills could be rounded without damaging the gap or the vicinity of the gap. Therefore, higher density recording is now possible without damaging the magnetic disk no matter how many times the magnetic disk is started and stopped. ``It is also possible to improve the lifespan and reliability of the magnetic disk and magnetic head.

[% example]

FIG. 1 is a partial perspective view of a magnetic head manufactured according to the present invention. The I magnetic head 3 is mounted on the jig 4, with the twills 6, 7, and 8 in contact with the magnetic disk being properly rounded, and with no scratches in the gap 2 or the vicinity of the gap 2.The method of rolling with a puff is shown in FIG. This is pressed against a puff to which the original fine abrasive is attached and which is rotating in the direction of arrow 11.

When the jig 5 is rotated in the direction of the arrow 9, the twill 7 is quickly polished and becomes round, and when the jig 5 is rotated in the direction of the arrow 0, the twill 6 is quickly polished and rounded. The twill 8 shown in FIG. 1 becomes as round as the twills 6 and 7 when rotated in both directions.

The flat surface 1 shown in FIG. 1 is hardly polished because the polishing speed is incomparably slower than that of Aya 6.7.8. The abrasive and polishing debris adhering to the vicinity of the gap 2Q are
Unfortunately, due to the rotation of the puff 5 and the 40 rotations of the jig shown in Figure 2, it will not be shaken off and scratches will occur in the gap.

Further, even if the puff 5 applies pressure to the gap, it will not be damaged if the material of the puff 5 is made of a soft material such as a cap.

To attach the head of the rigid jig 40 shown in Figure 3, attach many magnetic heads to the surface 12, insert the shaft 13 into the hole 15 of the rotating jig L6 shown in Figure 4, and attach the head to the puff 5 as described above. When pressed, the rotational force of the puff is transmitted to the jig 4 in Fig. 3,
Rotating jig shown in figure 4 ■ The bearing 14 rotates and the jig 5
rotates smoothly.

The time required for the puff 5 to round the heads 3, 6, 7, and 8 varies somewhat depending on the material of the magnetic head, puff, and abrasive, but is approximately one minute. Therefore,
Mass production is also very good.

FIG. 5 shows the relationship between the frequency and reproduction output of the magnetic head of the present invention and the conventional magnetic head. 18 is the magnetic head 1 of the present invention.
7 is a conventional magnetic head. As is clear from FIG. 5, the output of the magnetic head of the present invention is improved by about 20% compared to the conventional one, and the frequency characteristics are also improved, making it suitable for high-tight anal recording.

With the embodiments described above, the magnetic head does not damage the magnetic disk when starting or stopping the magnetic disk.
Furthermore, since no scratches occur in the gap, it is effective in improving high-density recording and reproduction output.

〔Effect of the invention〕

As explained above, the present invention uses the simple operation of rolling the magnetic disk with the twill and buff that contacts the magnetic disk of the magnetic head, so that the magnetic disk is not damaged when starting and stopping, and no scratches are caused in the gap. Result check 5
As shown in the figure, the magnetic recording/reproducing output is improved by about 20 es compared to the conventional magnetic head.

[Brief explanation of drawings]

FIG. 1 is a partial perspective view of a small magnetic head according to the present invention, and FIG.
The figure is a partial sectional view of a magnetic head during puff polishing according to the present invention, Figure 3 is a perspective view of a jig according to the present invention, Figure 4 is a perspective view of a rotating jig O according to the present invention, and Figure 5 is a perspective view of a rotating jig according to the present invention. It is a graph showing the relationship between reproduction output and frequency of the conventional O-head and the present invention. FIG. 6 is a partial cross-sectional view of a conventional magnetic head during lapping. Figure 7 is a diagram showing the conventional ■Magnetic head to magnetic field -Yl 过进子 1st jig/I 1st side 3rd figure 4 1st side 3rd figure , X number for Kahi. Sekizuhe T. Ding, 1
Figure 5.
Figure 6

Claims (1)

[Claims] A method for manufacturing a magnetic head of a flying slider type, characterized in that a twill that contacts a magnetic disk is rounded by a puff.