JPH02230574A - Magnetic head slider - Google Patents

Abstract

PURPOSE:To prevent the exhaustion of lubrication on a magnetic disk plane due to contact start/stop by providing a lubrication part in which lubricant is impregnated in a sliding plane with a magnetic disk and a dynamic pressure air bearing plane. CONSTITUTION:A square recessed part is formed on the sliding plane with the magnetic disk and the dynamic pressure air bearing plane 20 of a magnetic head slider 2 by using an ion beam etching device, and binder is filled and hardened, and after that, a surplus part is cut considering the amount of expansion due to the impregnation of the lubricant, and the lubricant is impregnated, then, the lubrication part 7 is formed. Thereby, it is possible to prevent the exhaustion of lubrication on the surface of the magnetic disk occurring even when a thin film disk with low lubrication holding capability is used, and to improve the contact start/stop characteristic of a magnetic disk device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a magnetic head slider of a magnetic recording device, and particularly aims to improve CSS characteristics with a magnetic disk.

[Prior Art] The main components of a fixed magnetic disk device, which is one of the external storage devices of a computer, are composed of a magnetic disk and a magnetic head slider. The concept is shown in the cross-sectional configuration diagram in FIG. (1) is a magnetic disk, (2) is a magnetic head slider, (3) is a suspension, and (4) is a spindle. Further, a conventional magnetic head slider (2) is shown in a schematic perspective view in FIG. 5, and a state in which it is attached to a suspension (3) is shown in a schematic perspective view in FIG. (5) is the magnetic head, (6) is the lead wire, (20) is the sliding surface of the magnetic head slider (2) with the magnetic disk (1) (when the magnetic disk starts and stops rotating), and the dynamic pressure It is an air bearing surface.

A magnetic disk (1) is a medium on which recorded information is written and holds it. The magnetic head (5) and magnetic head slider (2) write information on the magnetic disk (1),
The suspension (3), which is a reading device, is a spring that presses the magnetic head slider (2) against the magnetic disk (1), and the spindle (4) is a device that rotates the magnetic disk (1) in the direction of the arrow.

In a fixed disk device, when writing information to or reading information from a magnetic disk (1), the magnetic disk (1) is rotated at a high speed of, for example, 3600 rpm in the direction of the arrow. Using the air flow generated by this rotation, the magnetic head slider (2) uses the principle of air bearing to move the magnetic disk (1
) Float with a submicron gap above the surface. That is, the pressing force of the suspension (3) and the upward force of the air flow are balanced, and the magnetic head I/slider (2) floats stably.

On the other hand, when the magnetic disk device is not used, the spindle (4) stops rotating, and the magnetic head slider (2) is pressed by the suspension (3) and comes into contact with the magnetic disk (1). This is called a contact start switch (CSS) operation.

7 and 8 are enlarged sectional views of the vicinity of the magnetic head slider (2) in FIG. 4. FIG. 7 shows the magnetic disk device when it is in operation (the magnetic disk is rotating), and FIG. 8 shows the magnetic disk device when it is stopped (the magnetic disk is stopped).

[Problem to be solved by the invention] In recent years, as the demand for higher density recording in magnetic disk devices has increased, thin film tapes formed by sputtering, plating, etc. have come to be used for magnetic disks. . However, with thin-film tapes, the lubricant applied to the outermost surface of the magnetic tape does not penetrate into the inside of the magnetic tape, unlike a coating disk. Furthermore, the magnetic head slider used for the application disk is also used. Therefore, the lubricant on the surface of the thin-film disk is gradually removed by the CSS of the magnetic disk device, and the thin-film disk and the magnetic head slider eventually come into direct contact, resulting in the loss of important recorded information.

This invention was made in order to solve the above-mentioned problems.The magnetic head slider has a function of retaining lubricant, and even when a thin film disk with a small lubricant retaining capacity is used, the magnetic disk The purpose is to prevent the surface from running out of lubrication, improve the CSS characteristics of the magnetic disk device, and extend the life of the CSS.

[Means for Solving the Problems] The magnetic head slider of the present invention is provided with a lubricating portion impregnated with a lubricant on the sliding surface with the magnetic disk and the hydrodynamic air bearing surface.

[Function] In this invention, the lubricant impregnated in the lubricating part does not cause lubrication failure even in a disk C where the lubricant does not cover, such as a thin film disk.
S characteristics are improved.

[Example] In the magnetic head slider of the present invention, for example, a recess is formed on the hydrodynamic air bearing surface (sliding surface), a hardened resin of a binder having a liquid holding power is filled in the recess, and a lubricant is applied to the recess. A lubricating part is provided by impregnating it with lubricating ability.

FIG. 1 is a partially cutaway schematic perspective view of a magnetic slider according to an embodiment of the present invention, and FIG. 2 is a schematic perspective view showing the magnetic slider attached to a suspension. In the figure, (2) is a magnetic head/slider, (3)
is the suspension, (5) is the magnetic head, (6) is the lead wire, (20) is the sliding surface of the magnetic head slider (2) with the magnetic disk (1) and the hydrodynamic air bearing surface, and (7) is the dynamic pressure air bearing surface. A lubricating part provided on the pneumatic bearing surface (20), in this case made of a binder (cured resin) impregnated with liquid lubricant.

First, the dynamic pressure air bearing surface (2) of the magnetic head slider (2)
0) to a depth of several tens of μm using an ion beam etching device.
Four parts of a rectangular shape of m are formed, and a binder is filled therein and hardened. Thereafter, taking into consideration the amount of expansion due to penetration of the lubricant, the excess was scraped off, and the lubricant was soaked in to form a lubricated portion (7).

The operation of the conventional magnetic disk device is exactly the same as that of the conventional one, but when a CSS test was conducted using the magnetic head 1 and slider (2) of this embodiment, it was found to be good and better than the conventional one.
S life was long.

FIG. 3 is a partially cutaway schematic perspective view of a magnetic head slider according to another embodiment of the present invention;
is filled with a mixture of hard inorganic fine powder such as AI203 and impregnated with a lubricant to form a lubricating part (7).

In addition, although the shape of the lubricating part (7) is shown in the above embodiment as a rectangular shape, it may be formed of any shape other than a cured resin as long as it can hold the lubricant. Well, lubricants are not limited to liquids.

[Effects of the Invention] As described above, according to the present invention, by providing a lubricant impregnated with a lubricant on the sliding surface of the magnetic head slider with the magnetic disk and the hydrodynamic air bearing surface, the magnetic Since the disc surface does not run out of lubrication, head crashes can be suppressed, good CSS characteristics can be obtained, and CSS
This has the effect of extending the life of the

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway schematic perspective view of a magnetic head slider according to an embodiment of the present invention, FIG. 2 is a schematic perspective view showing the magnetic head slider attached to a suspension, and FIG. 3 is a schematic perspective view of a magnetic head slider according to an embodiment of the present invention. FIG. 4 is a schematic perspective view showing a magnetic head slider according to an embodiment of the present invention with a portion cut away; FIG. 4 is a sectional configuration diagram showing a general magnetic disk device; FIG. 5 is a schematic perspective view showing a conventional magnetic head slider; Figure 6 is a schematic perspective view showing the state in which it is attached to the suspension, Figures 7 and 8 are
This is an enlarged sectional view of the vicinity of the magnetic head slider (2) in FIG. 4, with FIG. 7 showing the magnetic disk device when it is in operation, and FIG. 8 showing it when it is stopped. In the figure, (2) is a magnetic head slider, (7) is a lubricating part, and (20) is a sliding surface and an air bearing surface. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] It slides against the magnetic disk when it starts and stops rotating,
In a magnetic head slider that floats due to the air flow accompanying the rotation and records and reproduces information between the magnetic disk and the magnetic disk, the sliding surface with the magnetic disk and the hydrodynamic air bearing surface are impregnated with a lubricant. A magnetic head slider characterized by being provided with a lubricating section.