JPS61206917A - Magnetic head - Google Patents

Abstract

PURPOSE:To make dust, etc. hardly stickable to a head even in a narrow spacing state and to make possible the stable long-term use of the head by providing conductivity to a slider part. CONSTITUTION:Conductivity is provided to the slider part of the magnetic head to be used for a magnetic recorder in which the min. spacing between the head and a recording medium during floating is <=0.35mum and >=0.05mum. For example, the slider 1 constituted by forming a thin film transducer part 5 on a non-conductive substrate consisting of ZrC2, Al2O3-TiC, etc. having high strength is formed with a conductor 4 consisting of Au, etc. on the surface part thereof by a sputtering method in order to have the electrical conductivity. The preferable film thickness of the conductor 4 is >=20Angstrom . The non-conductive material is not limited to the metallic conductor along and may be a conductive material such as SnO2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic head such as a magnetic disk device for a computer, and particularly to a magnetic head suitable for a device used in a narrow spacing state of 0.35 μm or less. do.

[Background of the invention]

Conventionally, the slider element of a thin-film magnetic head was developed in Japanese Patent Application Laid-Open No. 1986-
As described in No. 163665, non-magnetic non-conductive materials such as stainless steel and Afi, O, -TiC, which have low porosity and excellent wear resistance properties have been used. Stainless steel sliders have poor mechanical strength, but AΩ20. - By using TiC ceramic.

It has been shown to have a long mechanical life. But 1
No consideration was given to the fact that if the magnetic head of this configuration is used with a spacing of 0.35 μm or less, dust will adhere to the tapered portion at the tip of the slider, making the head likely to crash.

[Purpose of the invention]

An object of the present invention is to provide a highly reliable magnetic head that can be stably used for long periods of time even in a narrow spacing state without dust and the like adhering to it.

[Summary of the invention]

The inventors used slider materials made of various materials, and 0.
We evaluated flying stability and dust adhesion when using narrow spacings of 35 μm or less, and found that dust adhered to the slider tip due to electrostatic interaction and caused the head to crash. It was revealed that by grounding this, dust adhesion and head crash can be prevented.

[Embodiments of the invention]

The present invention will be described in detail below.6 Figure 1 shows a side view of a magnetic head that is an embodiment of the present invention.The ferrite or perovskite semiconductor substrate shown in Table 1 is used as a slider substrate 1. A thin film head 2 is formed on this substrate using a semiconductor process. Note that when this head is incorporated into a device, it is more desirable to arrange the head portion so that it is grounded.

FIG. 2 shows another embodiment. This head has a magnetic core formed of conductive single-crystal Mn-Zn ferrite (Table 1 (2)), which also serves as a slider 1.

Table 1 and FIG. 3 show yet another embodiment. This head is M
A head chip 3 made of n-Zn ferrite single crystal or made of a high saturation magnetic flux density magnetic alloy in the vicinity of the gap is embedded in a slider portion 2 made of the materials shown in Table 1.

FIG. 4 shows yet another embodiment. This head is Zr
The thin film transducer portion 5 is formed on a high-strength but non-conductive substrate such as O, AQ, O, -TiC. A conductor 4 made of Au or the like is formed by sputtering. The film thickness of the conductor 4 may be 20 Å or more, and the non-conductive material is not limited to a metal conductor.

A conductive material such as SnO□ may also be used.
It may also be applied to a head having the structure shown in the figure.

According to the present invention, the relationship between head crash time and spacing was tested using a coated disk using an accelerated test method in which the amount of dust was artificially increased, as shown in FIG. A remarkable improvement in properties is observed when the thickness is 35 μm or less. That is, in the same figure (a), the semiconductor B a
The structure shown in Fig. 1 uses TiO3 as the slider material, the structure shown in Fig. 2 uses Mn-Zn ferrite single crystal (b), and the structure shown in Fig. 2 uses a semiconductor (Ba-Sr). Ti
The structure shown in Fig. 3 with e as the slider material, and the same figure (d) are as follows:
1.0. -200mm Au using TiC substrate as slider material
This figure shows the crushing resistance time for each example having a manually sputtered structure.
C is the substrate, and the spacing amount is 0.0% compared to the crushing resistance time of a conventional head having the same shape as that shown in FIG.
It becomes significantly longer when it is 35 μm or less. conductive G
However, when the o-Ni-P plated disk was used, the difference between the two became smaller.

Qualitatively, similar effects were obtained.

Although the embodiments of the ceramic slider have been described above, similar effects can be obtained by using a metal slider material such as stainless steel. However, metal sliders have drawbacks such as significant wear when C8S is repeated and the slider warping when miniaturized due to its small Young's modulus, so ceramic sliders are more desirable.

〔Effect of the invention〕

According to the present invention, it is possible to prevent the head from crashing due to the electrostatic charge generated by reducing the spacing, which causes dust to adhere to the tapered portion of the head slider, and to improve the crash resistance of the head. The effect is that it can be significantly improved.

[Brief explanation of the drawing]

1, 2, and 4 are side views of a magnetic head according to an embodiment of the present invention, FIG. 3 is a bird's-eye view of another embodiment, and FIG. 5 is a side view of a magnetic head according to an embodiment of the present invention. FIG. 3 is a relationship curve diagram between head crash resistance time and spacing distance. 1...Slider, 2...Head. Figure 1■Figure 4

Claims (1)

[Claims] 1. Minimum head spacing between recording media when floating is 0.
1. A magnetic head used in a magnetic recording device having a diameter of 35 μm or less and 0.05 μm or more, characterized in that the slider portion thereof has conductivity. 2. The magnetic head according to claim 1, wherein at least one magnetic pole is formed of a thin film magnetic material.