JPH01303625A - Magnetic head - Google Patents

Abstract

PURPOSE:To improve the smoothness accuracy of a magnetic recording medium surface without damaging said surface by inclining two rail faces and projecting rail face slightly around the outflow end of the two rail faces. CONSTITUTION:There is the projecting rail 4 in the arbitrary position between the rails 2 and 3. This rail inclines by an angle delta (deltanot equal to 0) with respect to the rails 2, 3. The projecting rail 4 inclines also by an angle beta with the rails 2, 3. The projecting rail side face can, therefore, the chipped away from right after the advance of the projecting matter, foreign matter and dust on the medium surface into the spacing between a slider 1 and the medium. The contact time between the projecting matter and the projecting rail is thus prolonged. Namely, the power to remove the projecting matter is related to impulse and the removing power increases when the contact time increases even if the power is the same and, therefore, the projecting matter is surely and efficiently removed. The smoothness accuracy of the medium surface is improved in this way.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic head slider used in the manufacturing process of magnetic recording media, and particularly relates to a magnetic head slider suitable for efficiently improving the smoothness accuracy of a magnetic recording media surface. Regarding the head.

[Conventional technology]

In order to perform high-density magnetic recording, it is necessary to stably float the magnetic head slider above the medium surface with a small gap. Therefore, during the recording medium manufacturing process, there is a step of removing minute protrusions on the surface of the medium to improve its smoothness. The conventional technology is
As described in Japanese Unexamined Patent Publication No. 54-80728 and 55-77039, a magnetic head slider having an uneven air bearing surface is sought over the entire surface of the medium, and the uneven slider surface is brought into contact with a protrusion and removed by cutting.

Further, as described in Japanese Patent Laid-Open Nos. 56-44123 and 59-81058, a magnetic head slider having a block of diamond or the like other than the slider air bearing surface is similarly sought to remove protrusions.

[Problem to be solved by the invention]

In the above-mentioned prior art, Japanese Patent Application Laid-Open No. 54-80728.

If the flying surface of the slider is made uneven as in No. 55-77039, the flying stability of the slider will be reduced and the medium surface may be damaged. Also, JP-A-56-441
In the prior art disclosed in No. 23, No. 59-81058, the flying stability is the same as that of the conventional magnetic head, but since the slider flies at an angle, the contact time between the block and the protrusion to be scraped is shortened. was shortened, and no consideration was given to ensuring that the protrusions were removed reliably and efficiently. Furthermore, the residue of the removed protrusions scatters onto the medium surface from which the protrusions have already been removed, and it becomes dust again.
This may result in the formation of protrusions.

An object of the present invention is to reliably and efficiently improve smoothing accuracy without damaging the surface of a magnetic recording medium, and to collect removed residue in one direction.

[Means to solve the problem]

The above purpose is to provide at least one protruding rail between the two rails that levitate the slider, and to separate the two rail surfaces and the protruding rail surface slightly from the outflow end of the two rail surfaces. let it lean to.

This is achieved by making an angle between the medium rotation direction and the longitudinal direction of the protruding rail to be equal to or greater than zero degrees.

[Effect]

Since the two rail surfaces to be floated and the protruding rail surface are slightly inclined, and the length of the rails in the longitudinal direction is the same, protrusions, foreign matter, and dust on the medium surface can easily interfere with the slider and the medium. Immediately after entering the block, the side surface of the protruding rail can be scraped off, and the contact time between the protruding object and the protruding rail is longer than that of blocks of the prior art. The ability to slowly cool a protrusion is related to impulse. Even if the force is the same, the removal ability increases as the contact time increases, so protrusions can be removed more reliably and efficiently than in the past.

Further, since the protruding rail surface and the medium running surface are parallel, the protruding rail does not damage the medium surface.

Furthermore, since the protruding rail is scraped off on one side, the residue can be collected in one direction, and it is possible to avoid scattering the residue again in the area where the protrusion has been removed on the medium surface.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1st
1 is a perspective view of a magnetic head slider according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a side view of the magnetic head slider in an aerodynamically floating state. In this magnetic head slider, Q, cLT, and α indicate the length of the magnetic head 1, the length of the tapered part, and the inclination, respectively.The two rails 2 and 3 move the head 1 magnetically as shown in Figure 3. This is for stably floating above the disk 5, and the outflow and inflow ends are 6.7 mm, and the gap or spacing between both ends 6, 7 and the magnetic disk 5 is ho.

Let it be hl.

A protruding rail 4 is located at an arbitrary position between the rails 2 and 3, and is inclined at an angle δ (δ≠0) with respect to the rails 2 and 3. In addition, as shown in FIG. 2, the protruding rail 4
is inclined by an angle β with respect to the rails 2 and 3. angle β
has a size of

From equation (1), as shown in FIG. 3, in the case of stable levitation, the surface of the protruding rail 4 and the surface of the magnetic disk 5 become parallel. Moreover, Qs in FIG. 2 is CO8α.

FIGS. 4 and 5 show protrusions and foreign objects on the magnetic disk surface of the magnetic head sliders of the present invention and the conventional example.

Side views of each case when the dust 8 comes into contact and begins to be scraped.

A plan view is shown. In both figures, (a) shows an embodiment of the present invention, and (b)
Comparing (a) and (b) of FIGS. 4 and 5, which show the prior art (Japanese Unexamined Patent Publication No. 59-81058), in the slider of the present invention, the projecting rail 4 protrudes slightly and the rail Since it is tilted at an angle δ with respect to 3,2, Lf/
The contact time with the protrusion 8 becomes longer by v (v: circumferential speed of the disk). Therefore, protrusions etc.8 can be removed reliably and efficiently.
can be removed.

FIGS. 6(a) and 6(b) show the process of removing protrusions using the magnetic head slider of the embodiment of the present invention and the prior art (Japanese Patent Application Laid-Open No. 59-41058). In order to remove protrusions from the entire surface of the recording medium 5, the head is caused to seek from the outer circumferential side to the inner circumferential side. In this case, in the case of the prior art, the same figure (b
) There is a possibility that the residue 11 of the protrusion will be scattered in the area where the protrusion removal has already been completed, and it will turn into dust again and form the protrusion. In the case of the embodiment of the present invention, the residue 11 is scattered to the side 10 of the region where the protrusions are not removed, as shown in FIG. The problems of the prior art can be solved.

Figure 7 shows two types of cross-sectional views of the protruding rail 4 (a) and (b).
shows. (a) has a rectangular cross section and is easy to process. (
Although b) is difficult to manufacture, it has a structure in which protrusions etc. are scraped off in part 14 and the scraped residue is deposited in part 15.
The effects of the present invention are further enhanced by combining it with the embodiment shown in FIG. 6(a) in the process of removing protrusions.

Further, as shown in FIG. 8, if several protruding rails are formed, the effect will be further improved.

Finally, dimensional tolerances when manufacturing the magnetic head slider of the present invention will be explained.

In the case of CO8α, the protruding rails may scrape the media surface, and vice versa, the effectiveness of the present invention is reduced.

As shown in FIG. 1, δ is set in the following range, assuming that the width of the slider is Qw, the width of the slider surface is Sw, and the length of the slider is 2. Also, when installing the slider and word arm with δ=O, it is possible to tilt the slider by δ or change the yaw angle by δ.
You can get the same effect by just adding it. The width of the protruding rail is approximately the width of the track that can be manufactured.

According to this embodiment, the following effects can be obtained.

(1) Protrusions can be removed reliably and efficiently.

This is effective in efficiently improving the smoothness accuracy of the medium surface.

(2) The protruding rail is effective in improving the smoothness accuracy of the medium surface without damaging the medium surface.

(3) It is possible to avoid scattering the residue after removal of the protrusions on the area on the medium surface where the removal of the protrusions has been completed, and to perform the protrusion removal step in which the residue is deposited.

As described above, the magnetic head according to the embodiment is used in the manufacturing process of magnetic disks, and by attaching a magnetic recording/reproducing element to the head and using it in a magnetic disk device, it is possible to prevent dust from the outside and from the inside during driving. The same effect can be obtained in removing dust generated from the machine and residue from the manufacturing process, and this embodiment is also effective in preventing head crashes.

〔Effect of the invention〕

According to the present invention, the following great effects can be obtained.

(1) The contact time between the protrusion to be removed and the side surface of the protruding rail that performs the cutting action can be extended, and the protrusion can be removed reliably and efficiently, efficiently improving the smoothness accuracy of the media surface. It is effective in making

(2) Since the medium running surface and the protruding rail surface can be prevented from coming into contact with each other, the protruding rail is effective in improving the smoothness accuracy of the medium surface without damaging the medium surface.

(3) It is possible to avoid scattering the residue after removing the protrusions on the area where the protrusions have been removed on the medium surface.

Since it can be deposited, a more reliable protrusion removal process can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a magnetic head slider according to an embodiment of the invention, FIG. 2 is a side view of a magnetic head slider according to an embodiment of the invention, and FIG. 3 is a magnetic head slider according to an embodiment of the invention. FIG. 4 is a side view when the magnetic head sliders of the present invention and the conventional example begin to come into contact with protrusions on the magnetic recording medium surface.
5 is a plan view of the above-mentioned FIG. 4, FIG. 6 is a plan view of the head and medium showing the protrusion removal process of the present invention and the conventional example, FIG. 7 is a sectional view of the protrusion rail, and FIG. FIG. 2 is a plan view of a magnetic head slider of the present invention provided with a large number of protruding rails. Kayatomin (Nopisa-bo/I-banko-no-don Otsu-zu)

Claims (1)

[Claims] 1. In a magnetic head slider that floats and removes protrusions on the surface of a magnetic recording medium with a slight spacing to improve the smoothness of the medium surface, two of the sliders that are air bearing surfaces At least one protruding rail for cutting the protrusion is provided between the rail surfaces of the two rails so that the protruding rail surface and the medium surface of the medium rotating body are parallel to each other. A magnetic head characterized in that a surface and a protruding rail surface are tilted about the outflow ends of the two rail surfaces. 2. The magnetic head according to claim 1, wherein the length of the protruding rail is the same as the length of the slider. 3. The magnetic head according to claim 1, wherein the width of the protruding rail is the same as the track width recorded on the medium. 4. An angle δ between the longitudinal direction of the protruding rail surface and the longitudinal direction of the two rail surfaces, where the width and length of the rail surface are Sw and l, respectively, and the width of the head is Sw, 2. The magnetic head according to claim 1, wherein the magnetic head is provided within a range of 0≦δ≦arctan ([lw-2Sw]/l).