JPH02210678A - 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 used in a magnetic disk device, etc., and particularly to a magnetic head slider equipped with a thin film conversion element.

[Conventional technology]

In recent years, magnetic disk drives have been required to have larger capacities and higher densities, and for this reason, it is necessary to miniaturize the flying height of the magnetic head.

For example, as described in Japanese Unexamined Patent Publication No. 121514/1989, a third
As shown in the drawings and FIG. 4, a pair of rails 2 are provided on the side surfaces of the slider. In addition, in order to further reduce the flying height, the width of both site rails is narrowed as shown in Figure 5, and the area at the outflow end where the thin film element is mounted is made large enough to form the thin film element. Some are opened in a fan shape.

The slider shown in Figure 6 is
This is disclosed in Japanese Patent No. 9, in which 5 is a plurality of grooves and 12 is a flat rail portion. The magnetic head slider disclosed in this publication always maintains the flying height of the slider at a small distance from the disk surface without being subjected to pressure due to the generation of a wedge-shaped gas film, and also maintains the flying height of the slider at a small distance from the disk surface when starting or stopping the disk. In order to reduce the contact surface pressure against the disk, a plurality of shallow grooves are formed in the longitudinal direction on the lower surface of the slider, leaving an end on the gas outflow side.

[Problem to be solved by the invention]

In the magnetic head slider shape shown in FIGS. 3 and 4, in order to reduce the flying height, it is necessary to increase the load 6, move the pivot point 7 of the support spring to the outflow end side, or move the pivot point 7 of the support spring to the outflow end side, or to reduce the flying height. It is necessary to reduce the width of 2. However, increasing the load may lead to damage to the magnetic medium 8. Furthermore, moving the pivot point 7 of the support spring toward the outflow end is undesirable from the viewpoint of dynamic characteristics, such as supporting the slider body away from the center of gravity, which may result in strange behavior during seek. moreover,
In a magnetic head slider in which a thin film element 4 is mounted on the outflow end of the sight rail 2, there is a limit to reducing the width of the sight rail 2 due to the size of the thin film element 4.

Also, JP-A No. 62-21937 shown in FIGS. 3 and 4
JP 62-231481 shown in No. 9 and Fig. 5
In the magnetic head slider in the publication, the space between the two site rails is formed by techniques such as etching and ion cutting, and there is a problem in that it takes a considerable amount of time to create a depth of about 15 microns using this technique. .

Further, in the configuration of Japanese Patent Laid-Open No. 62-219379 as shown in FIG. 6, there is no angle of attack at the air inflow end.

There is a risk that the flying magnetic head slider may fall forward onto the magnetic disk surface, and since the minimum flying gap of the magnetic head slider cannot be specified, there is a problem in that the mounting position of the conversion element is difficult.

Furthermore, since the entire lower surface of the slider is a surface on which flying edges are generated, there is a limit to reducing the flying gap between the slider and the magnetic disk.

An object of the present invention is to obtain a magnetic head slider with a small flying height and mounted with a thin film element in a short time.

[Means to solve the problem]

The above object is achieved by providing a plurality of grooves between a pair of sight rails disposed on both sides of the lower surface of the magnetic head slider body so that no floating edges are substantially generated in the portion.

[Effect]

Since the magnetic head slider of the present invention is provided with a plurality of grooves to prevent floating edges from occurring between the pair of rails on the lower surface of the slider, the manufacturing time of the magnetic head slider is shorter than that of the conventional one. This is dramatically shorter than the configuration.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a bottom view of the magnetic head slider of the present invention. The second @ is a cross-sectional view taken along line AA' in FIG. 1.

In FIGS. 1 and 2, 1 is a magnetic head slider;
2 is a pair of rails arranged on both sides of the main body; 3 is a tapered angle of attack provided at the inflow end of the sight rail 2; this angle of attack is similar to the configuration shown in FIG. 3; 4 is a thin film element which is a write/read converter mounted on the outflow end of the sight rail 2, and 5 is a plurality of shallow grooves provided between the sight rails 2.

The plurality of grooves 5 are arranged in the longitudinal direction of the magnetic head slider.
It is also provided to match the shape of the sight rail. Further, the depth, radius, and number of the grooves are set so that floating edges hardly occur between the sight rails when the recording medium rotates.For example, the depth of the grooves is about 20 microns. In addition, the width of the groove is such that the floating edge generated between the grooves is 3 times the width of the groove.
Since it is known that it is proportional to the multiplication factor, it is determined by taking this into consideration.

As for the groove processing method, it is easy to process grooves of about 20 microns by using laser-assisted chemical processing, which processes ceramic materials by irradiating laser light in an alkaline solution or reactive gas. It is also easy to process bent grooves as shown. Furthermore, the manufacturing time is reduced to about 1/20 compared to the process of forming the recessed portion 10 between the entire site rails in FIGS. 4 and 5. Moreover, since the magnetic head slider having the shape according to the present invention does not generate flying edges due to air flow between the sight rails, the flying height 9 can be determined substantially by the shape and width of the sight rail 2.
Does not impair low flying characteristics.

〔Effect of the invention〕

According to the present invention, a magnetic head slider with a small flying height mounted with a thin film element can be obtained in about 1/20 of the manufacturing time compared to a conventional structure. For this reason.

Mass production becomes possible, leading to lower costs.

[Brief explanation of the drawing]

FIG. 1 is a bottom view of the magnetic head slider of the present invention. FIG. 2: Section A-Az in FIG. 1 FIG. 3: Side view of the magnetic head slider. Figure 4: Bottom view of the magnetic head slider mounted as a head for the IB M3370 disk drive 6 Figure 5:
...A bottom view of a magnetic head slider disclosed in Japanese Patent Application Laid-Open No. 62-231481. FIG. 6 is a bottom view of a magnetic head slider disclosed in Japanese Patent Application Laid-Open No. 62-219379, in which a plurality of grooves are provided on the bottom surface of the slider. 1...Magnetic head slider, 2...Sight rail, 3...Taper (angle of attack)
, 4... Thin film element, 5... Groove. 6... Applied load, 7... Pivot point 28
...Magnetic medium, 9...Flying height, 10...
Hollow part, 11... Fan-shaped part, 12
...Rail surface. Figure 5

Claims (1)

[Claims] In a magnetic head slider having an angle of attack at the air inlet end and a pair of rails on both sides, a plurality of grooves are provided in the longitudinal direction of the slider so that substantially no flying edge is generated between the pair of rails. A magnetic head slider characterized by: