JPH103635A - Magnetic head slider and magnetic disk device using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a floating characteristic and to effectively prevent adhesion between a magnetic head slider and a magnetic disk by providing an island like rail part higher than a rail part on a position different from the rail part formed on a floating surface opposite to a recording medium and mainly deciding the floating characteristic. SOLUTION: The rail part 3 mainly deciding the floating characteristic for the air inflow direction 1 and a tapered part 2 viewing from the floating surface side of the negative pressure using type magnetic head slider is provided. A magnetic converter 4 is loaded on an air inflow end side, and a negative pressure generation groove part 5 generates negative pressure of nearly 10μm or below. The island like rail part 6 is heightened than the rail part mainly deciding the floating characteristic. Although the magnetic head slider becomes a contact state with the magnetic recording medium 7, and only the island like rail part 6 or the rail part 6 and a part of the rail part 3 are in contact with the medium 7, since a contact area is remarkably small, the adhesion is prevented while keeping the floating characteristic.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive, and more particularly to a magnetic head slider for preventing adhesion between a magnetic head slider and a magnetic disk, and a magnetic disk drive having the slider.

[0002]

2. Description of the Related Art In a conventional magnetic disk drive, at least two straight rail surfaces using only positive pressure form an air bearing surface as disclosed in Japanese Patent Publication No. 57-569. Magnetic head sliders have been widely used. Further, as disclosed in Japanese Patent Application Laid-Open No. 2-101688, a pair of side rails separated from the rear end of the slider and one center rail therebetween are provided, and a magnetic head is attached to the rear end of the center rail. A magnetic head slider mounted with a magnetic head has also been put to practical use. Also, in order to achieve a high recording density, a recording method having substantially the same recording density from the inner circumference to the outer circumference of the magneto-resistive head or the magnetic disk has begun to be used. There has been a demand to keep the flying height almost constant up to the side. For this reason, a slider using a negative pressure to maintain a constant flying height from the inner peripheral side to the outer peripheral side is disclosed in JP-A-6-124562 and JP-A-6-124562.
No. 215516. In order to further increase the recording density, the surface of the magnetic disk is also extremely smooth in order to further reduce the flying height, so that the magnetic disk device is likely to stick when the magnetic disk device is stopped. In addition, oil such as lubricant or grease of the magnetic disk adheres to the magnetic head slider during flying or due to contact between the magnetic head slider and the magnetic disk, and causes adhesion between the magnetic head slider and the magnetic disk when the magnetic disk device is stopped. That has become a problem.

As a measure for preventing adhesion of the magnetic head slider, there is a method disclosed in Japanese Patent Publication No. 58-21329 in which the air bearing surface is curved to reduce the contact area with the magnetic disk. But in this case,
If the amount of bending cannot be controlled, there is a disadvantage that the flying height and the flying posture vary. Also,
Japanese Patent Publication No. 63-56634 discloses a negative pressure utilizing magnetic head slider having a similar crown shape. In the case of the magnetic head slider utilizing negative pressure,
In particular, when the slider size is reduced, it becomes difficult to secure the negative pressure generating portion. Therefore, if a large negative pressure generating groove is secured at the center of the slider, the slider rail will inevitably be shaped to concentrate outside the slider. In this case, the crown / camber shape has a disadvantage that the effect of preventing the adhesion is reduced as compared with the case where the rail exists at the center portion of the slider.

As another countermeasure, Japanese Patent Laid-Open No.
As disclosed in Japanese Patent No. 4782, a contact area with a magnetic disk whose surface is roughened is provided on a surface facing the magnetic disk other than the surface defining the flying characteristics, and the magnetic disk is brought into contact with the magnetic disk in this area. Attempts have been made to prevent sticking. However, this method has a disadvantage that the number of steps for manufacturing the magnetic head slider increases.

[0005] As described above, in the prior art, since the adhesion solving means pays attention to the flatness between the magnetic head slider and the magnetic disk, problems such as a large variation in flying characteristics and a large number of steps are required. There was no effective solution.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a highly reliable magnetic disk drive which can effectively prevent adhesion between a magnetic head slider and a magnetic disk while maintaining flying characteristics. With the goal.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to provide a magnetic head slider that moves relative to a recording medium.
An island-shaped rail portion (a portion located closer to the recording medium) having a height higher than that of the rail portion is provided at a different position from a rail portion formed on the air bearing surface facing the recording medium and mainly determining the flying characteristics. It is solved by.

[0008]

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

FIG. 1 shows a first embodiment of the present invention, and is a front view of a negative pressure type magnetic head slider as viewed from the flying surface side. 1 indicates an air inflow direction. Reference numeral 2 denotes a tapered portion, and a rail portion 3 mainly determining the flying characteristics is indicated by 3.
Reference numeral 4 denotes a magnetic transducer mounted on the air outflow end side. 5
Indicates a negative pressure generating groove portion of about 10 μm or less, and 6 indicates an island-shaped rail portion which is higher (positioned closer to the recording medium) than the rail portion which mainly determines the flying characteristics indicated by 3. .

FIG. 2 is a side view of the magnetic head slider in a floating state. 1 indicates an air inflow direction. Since the inflow air is usually compressed and lifted by the two tapered portions, the four magnetic transducers mounted at the air outflow end balance in the state closest to the magnetic recording medium surface 7 as shown in the figure. At this time,
The island-shaped rail portion No. 6 has a small area and a height that is sufficiently small with respect to the flying height, and therefore does not affect the flying characteristics. FIG. 3 is a side view of the magnetic head slider when the magnetic disk drive is stopped. Due to the magnetic recording medium stop state, the magnetic head slider and the magnetic recording medium
In the case of the present invention, only the island-shaped rail portion 6 or a part of the island-shaped rail portion 6 and a part of the rail portion 3 come into contact with each other, and the contact area is very small.
Sticking can be prevented. Here, the area of the island-shaped rail part 6 is 200 times the area of the floating surface facing the recording medium.
It is desirable that it is about 1/50 or more and about 1/50 or less,
The difference in height between the rail 3 and the rail which mainly determines the flying characteristics is preferably about 50 nm. In addition, the island-shaped rail part of 6,
As shown in FIG. 1, there is no need for one, and there may be more than one. Furthermore, in order to reduce the influence on the flying characteristics, it is preferable that the island-shaped rail portions 6 are located closer to the air inflow direction than the center of the length in the slider air inflow direction. As a method of forming the island-shaped rail portion 6, when forming the rail portion by ion milling or the like using a mask, the island-shaped rail portion may be formed according to a difference in height to be created between the rail portion and the rail portion. A two-stage processing method that leaves only the island-shaped rail portion may be used. At that time, the alignment accuracy of the second mask was 6
It suffices to cover the island-shaped rail portion, and the processing is relatively easy. 4 to 10 are all applied examples of the first embodiment. 4 to 9 show examples of a negative pressure type magnetic head slider, and FIG. 10 shows an example of a positive pressure type (2-rail) magnetic head slider.

[0011]

According to the present invention, in a slider for a magnetic head which moves relatively to a recording medium, the slider is formed at a position different from a rail portion formed mainly on a flying surface facing the recording medium and mainly determining flying characteristics. By providing an island-shaped rail portion (a portion located closer to the recording medium) higher than the rail portion, it is possible to maintain flying characteristics and effectively prevent adhesion between the magnetic head slider and the magnetic disk. To balance with.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention as viewed from an air bearing surface side.

FIG. 2 is a side view of the slider according to the first embodiment in a floating state.

FIG. 3 is a side view of the slider according to the first embodiment when the apparatus is stopped.

FIG. 4 is an application example 1 of the first embodiment.

FIG. 5 is a second application example of the first embodiment.

FIG. 6 is a third application example of the first embodiment.

FIG. 7 is an application example 4 of the first embodiment.

FIG. 8 is a fifth application example of the first embodiment.

FIG. 9 is an application example 6 of the first embodiment.

FIG. 10 is an application example 7 of the first embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Air inflow direction, 2 ... Taper part, 3 ... Rail part (mainly determining flying characteristics), 4 ... Magnetic converter, 5 ... Negative pressure generation groove part, 6 ... Island rail part, 7 ... Magnetic recording medium.

Claims (5)

[Claims] 1. A slider for a magnetic head which moves relatively to a recording medium, the slider having one or more rails formed on a flying surface facing the recording medium and mainly determining flying characteristics, and a position different from the rail. A magnetic head slider having an island-shaped rail portion (a portion located closer to the recording medium) higher than the rail portion. 2. The magnetic head slider according to claim 1, wherein
A magnetic head slider having a plurality of island-shaped rails (parts located closer to a recording medium). 3. The magnetic head slider according to claim 1, wherein
Island-shaped rail (part closer to the recording medium)
Is located closer to the air inflow direction than the center of the length of the slider in the air inflow direction. 4. The magnetic head slider according to claim 1, wherein
A magnetic head slider characterized in that the area of the island-shaped rail portion (the portion located closer to the recording medium) is at least 1/200 and at most 1/50 of the area of the air bearing surface facing the recording medium. 5. A magnetic disk drive on which the magnetic head slider according to claim 1 is mounted.