JPH02206018A - Magnetic head support - Google Patents

Abstract

PURPOSE:To decrease the contact area with a magnetic recording medium and to enhance the holderability of a liquid lubricant by using a porous sintered body having a specific volumetric packing rate. CONSTITUTION:The contact area of the magnetic head support and magnetic recording medium decreases and the sticking between both does not arise if the magnetic head support 1 having a floating tapered part 1c, groove parts 1b and parts 1a for sliding contact with the magnetic recording medium is formed of a porous sintered body having <=95% volumetric packing rate. The holdability of the lubricant, such as perfluoropolyether, is enhanced if such lubricant is impregnated therein. The magnetic head support adequate for a magnetic disk device having high performance and high recording density, etc., is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head support suitable for application to a magnetic disk device.

[Prior Art] Conventional magnetic head supports for magnetic disk devices are sintered bodies of single oxides and carbides such as barium titanate, calcium titanate, silicon oxide, aluminum oxide, titanium carbide, zirconium oxide, and mixtures thereof. It is made with.

Generally, these sintered base materials are densely sintered to a filling rate of approximately 95% or more, and the surface of the magnetic head support that faces the magnetic recording medium is polished to a mirror finish.

[Problems to be Solved by the Invention] The above-mentioned conventional technology does not give any consideration to the sticking of the head support to the magnetic recording medium, which is called sticking. In metal thin-film magnetic recording disks created by sputtering, fine sliding marks called textures are applied in the circumferential direction of the disk to stabilize the characteristics when the magnetic head support and magnetic recording medium such as a magnetic disk come into contact and slide. We are trying to make this happen.

However, providing such sliding marks on the surface of a magnetic recording medium is difficult because it is difficult to manufacture the magnetic recording medium stably, and the flying characteristics of a floating head such as a fixed magnetic disk device are unstable. There are many problems that run counter to recent increases in recording density, such as stability and destabilization of the residual magnetization state of magnetic recording media. Furthermore, in order to improve sliding properties, liquid lubricants such as perfluoropolyether are often applied, but as pointed out in JP-A-58-41438 and JP-A-60-212823, etc. However, there are also questions about the sustainability of the lubricating effect due to the weak adsorption force.

An object of the present invention is to eliminate the above-mentioned problems and provide a magnetic head support suitable for a magnetic disk device.

[Means for solving the problem] The above purpose is to make the material of the magnetic head support have a volume filling factor of 9.
This can be achieved by using a porous sintered body having a porous content of 5% or less, and by impregnating the porous sintered body with a liquid lubricant such as perfluoropolyether.

[Function] By using a porous sintered body for the material of the magnetic head support, the contact area between the magnetic head support and the magnetic recording medium is reduced, and even if the surface of the magnetic recording medium is mirror-like and smooth, The tension between the two disappears.

In addition, by impregnating and using a liquid lubricant in the porous sintered body on the magnetic head support side, which can be considered to be almost stationary, rather than on the magnetic medium side, which rotates at high speed, liquid lubricant such as perfluoropolyether can be used. Compensating for the low adsorption of the material,
Liquid lubrication works continuously.

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

FIG. 1 is a perspective view of a conventional magnetic head support;
It is manufactured by cutting and polishing using the materials described in the prior art section above. 1a, part is a polished part that may come into contact with the magnetic recording medium, 1b.

is formed to function as an air inlet for generating lift on the magnetic head support in a floating magnetic head or the like. 1c, is also a groove portion for adjusting the lifting force in a floating head or the like. FIG. 2 shows an example of the configuration of a magnetic head using a conventional magnetic head support called a composite type. As shown in the figure, a magnetic head core 2 is inserted into a notch provided in a magnetic head support 1, assembled with adhesive by glass bonding, etc., and wound through a winding window 3. FIG. 3 shows an example of the structure of a thin film type magnetic head, in which a magnetic core 2, a winding 4, etc. are formed of thin films at the end of a magnetic head support 1.

The present invention relates to the magnetic head support section 1, and the magnetic head core section and winding section are the same as conventional ones, and will be omitted from further explanation. Furthermore, although the magnetic head shown here is for a hard disk device, the present invention is also effective in magnetic heads used in flexible disk devices (usually called floppy disk devices) that constantly slide in contact with the medium. It is possible to implement

FIG. 4 shows an example using the present invention, in which a porous sintered body is used as the magnetic head support and the same grinding and polishing processing as in the conventional example is performed.

Note that the porous surface facing the magnetic recording medium is smoothed. After the processed magnetic head support is washed and dried, it is impregnated with a liquid lubricant such as perfluoropolyether, which is often used in magnetic disk media. If necessary, pressure is applied to infiltrate the liquid lubricant.

Here, a fluorocarbon liquid lubricant such as perfluoropolyether is used as an example of the liquid lubricant, but in the method of the present invention in which a loosely sintered body is impregnated with a liquid lubricant, The type is not particularly specified. The method of the present invention can be applied in exactly the same way to synthetic lubricating oils other than fluorocarbons, such as dibasic acid esters, silicone oils, polyglycol oils, etc., as well as animal and vegetable oils such as natural petroleum oils and higher fatty acid oils. It can be used.

FIG. 5 is an enlarged view of the magnetic recording medium facing surface of the present magnetic head support, where 1a and 1d are flat parts, and 1d is a flat part.

This is the part where the pores are exposed on the surface and become recessed parts.

The production of such a sintered body with many pores can be easily controlled during compression molding before firing. FIG. 6 is a cross-sectional view schematically showing the pattern of contact between the magnetic head support of the present invention and the magnetic recording medium. 1 a.

is a cross section of the magnetic head support of the present invention, 5. shows a cross section of the magnetic recording medium.

As is clear from FIGS. 5 and 6, by using a porous material, the contact area between the magnetic head support and the magnetic recording medium can be reduced. Further, the proportion of these holes filled in the contact surface can be freely changed by controlling the filling rate of the sintered body.

In addition, the pores shown in the figure are connected to the sintered body through grain boundaries when the filling rate is about 95% or less, and by impregnating the sintered body with a liquid lubricant, It becomes possible to provide liquid lubrication effect over a long period of time.

[Effects of the Invention] According to the present invention, the contact area between the magnetic head support and the magnetic recording medium is reduced, so that there is no sticking between them, and it is also possible to maintain liquid lubrication for a long period of time. Since the sliding property of the material is dramatically improved, it becomes possible to apply it to high-performance, high-density magnetic disk drives.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional magnetic head support, Figure 2 is an example of a magnetic head called a composite type using a conventional magnetic head support, and Figure 3 is the same <conventional magnetic head. This is an example of a thin film type magnetic head using a support. FIG. 4 is a perspective view showing an example using the present invention, FIG. 5 is an enlarged view of the surface of the magnetic head support facing the magnetic recording medium, and FIG. 6 is the magnetic head support and magnetic recording medium of the present invention. This is a schematic cross-sectional view showing the pattern of contact with. 1...Magnetic head support 1a...Magnetic recording medium sliding contact part 1b...Flying tapered part lc...Groove part 1d...Vacuum 2...Magnetic head core 3...Winding window 4...Winding 5・Magnetic recording medium'G, Sat/No・1 person 7 Figure 1 Figure 3 Figure Figure Figure a

Claims (1)

[Claims] 1. In a magnetic head support that is used in a magnetic recording/reproducing device such as a magnetic disk device and supports a magnetic head core at a predetermined position on a magnetic recording medium, the material of the magnetic head support has a A magnetic head support characterized by using a porous sintered body having a filling rate of 95% or less. 2. The magnetic head support according to claim 1, wherein the magnetic head support is impregnated with a liquid lubricant such as perfluoropolyether.