JPH0254486A - Floating type magnetic head slider - Google Patents

Abstract

PURPOSE:To hold a stable floating state even when the quantity of floating is small without using machining technique which requires expensive facilities by forming a tapered part or step at the outside edge of the bearing surface of an air bearing. CONSTITUTION:A floating head slider 1 consists of two air bearing surfaces 2a and 2b and a track surface 10 which has a magnetic gap 12 at the rear part. The outside edges 7a and 7b of two side edges which form the side edges of the surfaces 2a and 2b have slanting parts between chamfers 3a and 3b and tray ring edges 6a and 6b, and consequently the widths of the surfaces 2a and 2b on the sides of the edges 6a and 6b are made narrower than those on the sides of leading edges 4a and 4b. Consequently, a stable floating attitude is held even when the floating quantity is small without using the machining technique which requires special expensive facilities.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording device, and particularly to a floating slider used in a hard disk device.

[Conventional technology]

Among the floating sliders used in hard disk drives, etc., the tapered flat slider, which is currently widely used, has two planar air bearing surfaces extending in parallel with a sloped front end. .

With the recording density of magnetic recording media increasing year by year, there is an urgent need to reduce the flying clearance (hereinafter abbreviated as flying height) between the medium and the slider.

Currently, the flying height of the Taber flat slider that is in practical use is about 0.2 to 0.34, but if you try to obtain a flying height of less than this with the Taber flat slider, the pitch angle will decrease, resulting in stable flying. It was extremely difficult to maintain the conditions.

Therefore, in order to solve this problem, a slider was proposed that could secure a predetermined pitch angle and maintain a stable flying state even at low flying heights (Japanese Patent Laid-Open No. 62-23148
No. 1).

This conventional floating slider is shown in FIG.
By forming steps on the inner edges of the two air bearing surfaces 2a and 2b, the width of the air bearing surface on the rear end side was made narrower than that on the front end side. Leading edge, 5 is recessed part,
6a and 6b are trailing edges, 7a and 7b are outer edges, and 18a and 18b are magnetic transducers.

Due to this width difference, the floating blade received by the slider 1 becomes relatively larger on the front end side than on the rear end side, resulting in a larger pitch angle. Furthermore, by adjusting this width difference, a predetermined pitch angle can be obtained, and a stable flying posture can be maintained even at a low flying height.

[Problem to be solved by the invention]

However, the conventional slider mentioned above has a step on the inner edge of the air bearing surface, so manufacturing it requires processing techniques such as sputter etching and ion milling that require special and expensive equipment. I had no choice but to use it.

An object of the present invention is to provide a slider that can maintain a stable flying state even at a low flying height without using special processing techniques as described above.

[Means to solve the problem]

In order to achieve the above object, the floating magnetic herad slider according to the present invention includes two planar air bearing surfaces extending in parallel with slopes at the front end, and the two planar air bearing surfaces extend from the front end. In an air bearing slider for supporting a magnetic transducer in which the width on the way to the rear end is narrower than the width at the front end, the air bearing The width on the rear end side of the surface is smaller than the width on the front end side.

〔Example〕

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

(Example 1) FIG. 1 is a perspective view showing a first example of the present invention. This is an example of application to a winchester type floating rad slider.

In FIG. 1, the floating RAD slider 1 of this embodiment is as follows:
It is composed of two air bearing surfaces 2a and 2b and a track surface 10 with a magnetic gap 12 at the rear in between them. There are slopes or chamfers 3a on the leading edges 4a and 4b sides of the air bearing surfaces 2a and 2b.
and 3b are formed. air bearing surfaces 2a and 2b;
All surfaces of the chamfers 3a and 3b and the track surface 10 are finished to a surface roughness of 0.1S or less by lapping or the like. Of the two side edges forming the side edges of the air bearing surfaces 2a and 2b, the inner edges 5a and 5b extend from the leading edges 4a and 4b to the trailing edge 6.
A and 6b are formed in a straight line. On the other hand, the outer edges 7a and 7b have an oblique portion between the chamfers 3a and 3b and the trailing edges 6a and 6b, thereby increasing the width of the air bearing surfaces 2a and 2b on the trailing edges 6a and 6b side. Edge 4a
and narrower than the 4b side. Outer edges 7a and 7b
In forming the shape as described above, in the first embodiment, recessed surfaces 16a and 16b are formed on the side surfaces 8a and 8b of the slider.
This is realized by forming the slopes 9a and 9b by grinding.

In addition, the inner edges 5a and 5b are also formed by grinding as in the conventional method6.In addition, in the figure, 13 is a winding portion, and 14 is a gap. As described above, the present invention provides a floating type RAD slider having stable flying characteristics at a low flying height without using any special processing techniques such as sputter etching or ion milling.

(Embodiment 2) FIG. 2 shows a second embodiment in which the present invention is applied to a composite type floating RAD slider in which ferrite is embedded in a non-magnetic ceramic material. The second embodiment has trailing edges 6a on the sides 8a and 8b of the slider.
The floating surface has air bearing surfaces 2a and 2b which are wide on the leading edges 4a and 4b side and narrow on the trailing edges 6a and 6b side by cutting diagonally on the and 6b sides to form slopes 9a and 9b. This is what I got from Herad Slider. In the figure, 19 is a core. The second embodiment can also be manufactured entirely by grinding.

(Embodiment 3) FIG. 3 shows a third embodiment in which the present invention is applied to a composite type floating head slider. In a third embodiment, the leading edges 4 of the sides 8a and 8b
By forming slopes 9a and 9b on the sides a and 4b and only in the vicinity of the air bearing surfaces 2a and 2b, the width is wide on the leading edges 4a and 4b side.
A floating head slider is manufactured which has narrow air bearing surfaces 2a and 2b at the trailing edges 6a and 6b. The third embodiment also has the same effect as the first embodiment.

Furthermore, the present invention can be applied to a floating RAD slider equipped with a thin film head in which a magnetic transducer is formed of a magnetic thin film or the like, and the same effect can be obtained.

〔Effect of the invention〕

As explained above, the present invention is achieved by adding a taper or step to the outer edge of the air bearing surface.

This has the effect that a slider that can maintain a stable flying posture even at a low flying height can be obtained without using processing techniques such as sputter etching or ion milling that require special and expensive equipment.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the present invention. FIG. 2 is a perspective view showing a second embodiment of the invention, FIG. 3 is a perspective view showing a third embodiment of the invention, and FIG. 4 is a plan view showing a conventional example.

Claims (1)

[Claims] (1) Includes two planar air bearing surfaces extending in parallel with slopes at the front end, and the width of the two planar air bearing surfaces on the way from the front end to the rear end is the width at the front end. In the air bearing slider for supporting a magnetic transducer, the width of the rear end side of the air bearing surface is made smaller than the width of the front end side by tapering or stepping the outer edges of the two planar air bearing surfaces. A floating magnetic head slider characterized by being smaller.