JPH03216879A - magnetic head slider - 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 [Field of Industrial Application] The present invention relates to a magnetic head slider that flies by utilizing an air flow generated by a rotating magnetic recording medium, and in particular, the present invention relates to a magnetic head slider that levitates by using an air flow generated by a rotating magnetic recording medium, and in particular, the present invention relates to a magnetic head slider that levitates by using an air flow generated by a rotating magnetic recording medium. The present invention relates to a magnetic head slider.

[Conventional technology]

In order to achieve high reliability of magnetic disk drives, one of the important issues is to remove particulates such as dust existing on the magnetic disks and to prevent damage to the magnetic disks.

Conventionally, the rail section that serves as the flying surface of a magnetic head slider is
By arranging the magnetic head slider at a so-called skew angle, which is almost parallel to the tangential velocity vector line of the rotating magnetic disk but slightly oblique to the tangential velocity vector line of the trunk of the magnetic disk, the magnetic head can be JP-A-57-1 discloses a method for preventing dust from colliding with the trailing edge of a magnetic head slider and causing abrasion.
It is described in Publication No. 79969. Also, JP-A-58
Publication No. 111164 discloses that when the magnetic head slider is moved from the outer area of the magnetic disk to the inner peripheral area, the magnetic head slider and the magnetic disk float on the straight part of the inner rail of the magnetic head slider that is arranged at a skew angle. A method is described in which the surface of a magnetic disk is progressively cleaned by forcing dust particles larger than the gap to collide and drive them away. Also, JP-A-60-47278
In the publication. The structure of the head slider is such that it has the same width from the leading edge to the trailing edge along the moving direction of the magnetic recording medium, and the longitudinal ridge line is set non-parallel to the outer contour line, so that the magnetic recording medium A method of preventing wear of the magnetic head element by providing an air bearing surface that generates pressure to maintain a minute gap from the surface of the magnetic head element is described.

However, in the above conventional technology, when a magnetic head slider having a plurality of parallel rails is arranged on a magnetic recording medium, the magnetic head slider is tilted slightly so that it is not parallel to the tangential vector line of the rotating magnetic recording medium, or in advance. A skew angle is provided by arranging the rails so that they are non-parallel to the outer edge of the magnetic head slider. Therefore, when the magnetic head slider moves from the outer circumferential area to the inner circumferential area of the magnetic recording medium, dust can be removed due to the effect of the skew angle. If the magnetic recording medium is moved, the magnetic recording medium cannot be effectively used, and the magnetic recording medium may be damaged by fine particles such as dust that have entered through the tapered portion of the outer rail.

An object of the present invention is to eliminate dust on a magnetic recording medium even when the magnetic head slider moves from the outer circumferential area to the inner circumferential area of the magnetic recording medium or from the inner circumferential area to the outer circumferential area. The object of the present invention is to provide a magnetic head slider that can be used.

[Means to solve the problem]

In order to achieve the above object, the present invention provides that the inner edges of the tapered part and the rail part of the magnetic head slider are approximately parallel to the tangential velocity vector of the rotating magnetic recording medium, and the outer edges thereof are arranged so that the gas flows from the gas inflow end side to the gas outflow end side. A predetermined skew angle is arranged that widens toward the end. In addition, in order to maintain a stable floating posture when the magnetic head slider floats,
A pressure adjustment hole is provided on the gas outflow side of each rail.

[Effect]

As explained in the examples below, the outer edges of the inner rail and outer rail of the magnetic head slider are
A predetermined skew angle is provided for each. As a result, the magnetic head slider moves to the inner peripheral area of the magnetic recording medium.
Alternatively, since the outer edge of the rail section always precedes the tapered section when moving toward either side of the outer peripheral area, fine particles such as dust that are larger than the floating gap attached to the magnetic recording medium are It collides with the outer edge and is eliminated. As a result, damage to the magnetic disk caused by dust entering through the tapered portion is eliminated, and high reliability of the magnetic disk device can be achieved.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a magnetic head slider according to an embodiment of the present invention. The magnetic head slider 1 has a tapered part 2 and a flat rail part 3, which are air bearing surfaces that face a magnetic disk and generate a gas bearing effect, and a magnetic head (
(not shown). Furthermore, the rail inner edge 4 of the tapered portion 2 and the flat rail portion 3 is approximately parallel to the tangential velocity vector line of the rotating magnetic disk, and the rail outer edge 5 has a skew that widens from the gas inflow side to the gas outflow side. Corner 6 is located.

FIG. 2 shows another embodiment having the same effect as FIG. 1, in which the surface of the magnetic head slider 1 facing the magnetic disk is formed into a trapezoidal shape.

Here, in the magnetic head slider of FIGS. 1 and 2 of the present invention, the rail width W1 on the gas inflow side of the flat rail portion 3 is set larger than the rail width W2 on the gas outflow side. As shown in FIG. 3, depending on the size of the skew angle 6, the floating gap hz on the gas outflow side of the flat rail portion 3 becomes larger than the floating gap hx on the gas inflow side, and the flying posture of the magnetic head slider 1 becomes unstable. Possibly stable. Therefore, by providing a pressure adjustment hole 7 on the gas outflow side of the flat rail section 3 and releasing a part of the gas compressed in the flat rail section 3 to atmospheric pressure on the outflow side, when floating, it is possible to avoid the conventional magnetic head slider. It is set to have a gap ratio (h 2 / h t) equivalent to . This pressure adjustment hole does not necessarily have to be penetrated, but by making it penetrate, dust that has entered under the flat rail can be removed along with the gas flow flowing out from the pressure adjustment hole 7 to the back of the magnetic head slider. It is possible.

Furthermore, as shown in FIG. 4, the same effect can be added to the gas inflow side by providing pressure adjustment holes 7 such that D s < D 2 on the gas inflow side of the flat rail section 3. .

FIG. 5 is a diagram showing the operation using the magnetic head slider of the present invention for removing dust on a magnetic disk.

Since a predetermined skew angle 6 is provided on each of the outside rails 1 #5 of the magnetic head slider 1, no matter which direction the magnetic head slider 1 moves toward the inner circumferential area or the outer circumferential area of the magnetic disk, the taper Since the rail outer edge 5 of the flat rail section 3 is in front of the rail outer edge 5 of the flat rail section 3, dust that is larger than the floating gap adhering to the magnetic disk collides with this rail outer edge 5 and is blown away by the gas flow. is removed from the magnetic disk surface. Further, at the same time, small dust particles that enter under the flat rail and cause fluctuations in flying height can also be eliminated by the accompanying effect of the pressure adjustment hole 7.

Further, by using the magnetic head slider of the present invention, the following method of manufacturing a magnetic disk device is possible. As shown in FIG. 6, after the step of storing the magnetic disk 9 and the rotation mechanism system 10 in the base 8 that constitutes the surrounding wall of the magnetic disk, the drive mechanism system of the magnetic head slider is placed in the base 8. Before assembly, while rotating the magnetic disk 9, the magnetic head slider 1 of the present invention is reciprocated at a slow enough feed rate to remove dust on the magnetic disk. At this time, by forcing clean air into the base 8 that houses the magnetic disk in the direction of rotation of the magnetic disk 9 and exhausting it, the air collides with the outer edge 5 of the rail of the magnetic head slider 1, causing the air to explode. The dust blown away and the dust discharged from the pressure adjustment hole 7 can be carried by this air flow and discharged to the outside of the base, thereby reducing the amount of initially enclosed dust generated during the manufacturing process of the magnetic disk device. .

Note that regarding the pressure adjustment hole, the size and shape position of the hole are not limited.

〔Effect of the invention〕

According to the present invention, among the dust existing on the magnetic disk, the dust larger than the flying gap between the magnetic head slider and the magnetic disk can be removed by using the outer edge of the rail of the magnetic head slider having a skew angle. can be eliminated by utilizing the accompanying effects of pressure adjustment holes.

As a result, damage to the magnetic disk caused by dust can be prevented, and the reliability of the magnetic disk device can be improved.

[Brief explanation of drawings]

FIG. 1 is a plan view (a) and side views (b) and (C) showing a magnetic head slider which is a first embodiment of the present invention, and FIG. 2 is a magnetic head slider which is a second embodiment of the present invention. Plan view (a) and side view (b) of the head slider. (C). Fig. 3 is an explanatory diagram of the function of the pressure adjustment hole, Fig. 4 is a plan view of a magnetic head slider with pressure adjustment holes provided on the gas inflow side and the gas outflow side of the flat rail section, and Fig. 5 is a magnetic head slider according to the present invention. FIG. 6 is an explanatory diagram of the operation of the hend slider, and FIG. 6 is an explanatory diagram of the method of manufacturing a magnetic disk device using the magnetic head slider of the present invention. 1...Magnetic head slider, 5...Rail outer edge, 6...
・Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. In a magnetic head slider having a plurality of tapered portions and rail portions that generate a gas bearing action between the rotatable magnetic recording medium having concentric tracks on its surface, the magnetic The inner edges of the tapered portion and the rail portion of the head slider are arranged approximately parallel to the tangential velocity vector line of the rotating magnetic recording medium, and the outer edges are arranged with a skew angle that widens from the gas inflow side to the gas outflow side. A magnetic head slider further comprising at least one pressure adjustment hole provided on the gas outflow side of each rail.