JPS58218018A - Magnetic head - Google Patents

Abstract

PURPOSE:To attain efficient recording and reproduction only at one side of a meidum, by providing a winding for recording and reproduction near a magnetic pole formed so as to introduce efficiently the magnetic flux at recording and reproduction in a magnetic head for vertical recording and reproduction. CONSTITUTION:A high permeability magnetic film 9 is formed on a nonmagnetic base 8 formed with a roof-shaped projection 13 having two slopes approached each other as they are separated from the base surface, and a recording/reproduction conductive layer 11 is formed so as to surround the said projection 13 through an insulation layer 10. After an insulation layer 12 is formed on the layer 10, the end face of the high permeability megnetic film 9 having (t) width in the direction of running and (w) track width in the orthogonal direction is formed so as to be matched to sizes of a recording medium by polishment. The high permeability magnetic film is made of Pernealloy by 9 vapor deposition and ceramic is used for the base 8. Vapordeposited or plated gold or copper is formed into the said shape of the conductive layer 11 with the mask processing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head for recording and reproducing information using residual magnetization perpendicular to the magnetic film surface of a recording medium in magnetic recording.

When recording high recording density (short wavelength) e) 4i' on a magnetic/magnetic recording medium, the damage to the recording medium is greater than the method of recording by magnetization in the recording medium 0rfI direction. direction.

That is, it is known that a method of recording by converting images into direct definitions is more advantageous.

, as a recording medium used in magnetic recording.

A high coercive force magnetic film with perpendicular magnetic anisotropy is suitable.

C6-C(, Co-Cr-Rh a barium ferrite.

Materials such as co-Ni-Mn-P are known.

It is also known that a magnetic head for perpendicular magnetic recording needs to generate a magnetic field in the vertical direction on the medium surface in a narrow range, and that a structure as shown in Fig. 11 is suitable. It is being This magnetic head.

A short wheel pole pole l made of a high magnetic permeability magnetic film, and an auxiliary magnetic pole 2 made of a magnetic material having a recording/reproducing efficiency Is3 of 1 and sufficiently thicker than the semi-pole 1 are used. Place the body 4 in between! There are also 91 configurations. Also, such magnetism, 5
It is also known that in the case of using a magnet, recording and reproducing efficiency can be greatly improved by using a recording medium containing a high permeability magnetic thin film layer 6 between the recording medium 4 and the substrate 5.

The magnetic head with the above-mentioned structure improves recording and reproducing efficiency as the distance between the magnetic pole and the auxiliary magnetic pole becomes smaller. On the other hand, for magnetic recording media that have a relatively thick base, such as rigid nasal disks, since one side of the base is attached, the 2gE rice glue/glue head has so far been used for that purpose.
However, the ring head was not sufficient for the integration of YT and US single-plane recording.

The object of the present invention is to provide a winding #I for recording and reproducing in the vicinity of a magnetic pole formed to efficiently guide magnetic flux during recording and reproducing in a 0-picture direct distribution recording head. Efficiently only on the side.

Our goal is to provide a magnetic head that can record and reproduce information. ,...□・1:.

The magnetic head of the present invention includes a non-d1 substrate in which protrusions having two 1+ planes are formed that approach each other as one goes from the -4: substrate surface, and a high-rate magnetic field formed on this substrate. The present invention is characterized in that it has a structure including a conductor layer formed on the film and further on the insulating layer so as to surround the protrusion.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a diagram showing a magnetic head according to the present invention. 1
f#, . . . FIG. 3 is a sectional view between X and X1 in FIG. 2. As shown in these figures, the magnetic head of the present invention has a highly transparent substrate 8 on which is formed a root-like protrusion 13 having two slopes t that extend over each other as the distance from the substrate surface increases. A magnetic film 9 is formed, and a recording/reproducing conductive layer 11 is further formed.

This structure is formed so as to surround the protrusion 13 with an insulating layer IO in between.

Further, an edge layer 12 is formed on this, and after rounding, the width t in the strike direction is adjusted to match the dimensions of the recording medium by polishing.
The end face of the high magnetic permeability magnetic film 9 having a track width of 11111□ in the direction perpendicular to this was formed. Similarly, the external conductor terminals A and H have been omitted to avoid complication in Figure 1.High permeability magnetic N9 is made by vapor deposition or sintering of 8 mm malloy, Co-Zr, etc. The non-magnetic substrate 8 is made of ceramic.

8t02 e Al 203 #Silicon etc. are used, and the insulating layers 10 and 12 are 8it)2, A
l2O3 etc. are used. Further, the conductive layer 11 is formed in the above shape by applying vapor deposition, plating, or sputtering of gold or copper to a mask process. A method for forming root-shaped protrusions 13 having slopes t- of 2'-) such that they cover each other as they move away from the substrate direction is described below using the non-magnetic substrate 8.
The case where i02 is used will be explained.

For example, as shown in FIG. 4, on an 8i02 board 8.

After forming a positive type photoresist 14 in a shape with a thickness of 1.5 μm, a width of 3 μm, and a length of 20 μm, argon pressure PAr = 2-X10' Torr, voltage 500 V, current density 0. When Io/milling was performed for 45 minutes with Bm Alrs2, a 1141j-shaped protrusion 13 with a height of 1.5 μm, a width at the top of 0.8 μm x 18 μm, and a slope with an angle of about 58' was formed as shown in FIG. It is formed. 0 on this
For example, a high permeability magnetic film 9 such as permalloy, a, -zr, etc.
After forming a film with a thickness of 1 μm, @
and a recording/reproducing conductor layer 11 with a thickness of several thousand to several microns.
is formed so as to surround the protrusion 13 of 1yI.

Furthermore, by forming an insulator 412 and polishing it after death, a single pole having an end face with a width t in the running direction of the recording medium and a several electron track width of approximately 20 μm is formed.
FIG. 3 is a diagram for qualitatively explaining the recording and reproducing operations of the magnetic head according to the present invention. In other words, when recording with one magnetic head.

When a recording current is passed between the terminals A and B of the conductor 4@11 in the direction shown in the figure (clockwise direction when viewed from the non-magnetic substrate 8@), a high magnetic permeability magnetic film 9 forming the magnetic pole flows. , magnetic flux 1
5 [- is generated, which generates a magnetic field 16 from the tip of the magnetic pole toward the medium 7 (FIG. 6). During reproduction, the magnetic flux 19 generated from the magnetization 18 in the medium is taken in by the tip of the Al pole and guided into the high magnetic permeability #I film 9, and the change in this magnetic flux is detected as the terminal voltage of the conductive layer 1. Figure 7). Here, the high permeability magnetism II & 9 forming the magnetic pole is the magnetization 1 in the medium.
The shape follows the magnetic flux generated from 8 and 9. In addition, since it is formed at a position very close to the medium (on the order of several micrometers) from the medium facing surface, it is possible to efficiently guide the magnetic flux 15 during recording and the magnetic flux 19 during reproduction. Since the layer 11 is provided close to the magnetic pole and the medium, the recording magnetic flux can be generated and the reproducing magnetic flux can be detected efficiently.

Further, the shape of the magnetic pole described here can be formed into a desired shape by appropriately selecting the ion milling conditions, the thickness of the high permeability magnetic layer, and the polishing conditions.

1ks? The two slopes, which approach each other with distance from the base surface 1 on which the non-magnetic base and magnetic base are formed, do not have to be flat knees as shown in the drawings, but may be curved surfaces. Also, the cross section of the protrusion does not have to be as symmetrical as shown in the figure.

1..1 The upper end of the protrusion does not need to be flat as shown in the figure, but may be edge-shaped and may be at °C.

Considering that the magnetic recording medium 7 runs very close to the magnetic head of the present invention, it is desirable that the insulating layer 12 shown in the drawing be formed with a layer, but even if it is not formed, the present invention can still be applied in principle. There is no kernel where excellent young fruit is lost.

As described above, according to the present invention, it is possible to provide a magnetic head for perpendicular recording and reproducing which can perform recording and reproducing on only one side of the recording medium and has high efficiency.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional magnetic head for recording and reproducing vertically arranged vertical beams, FIG. 2 is a diagram showing a magnetic head according to the invention, and FIG.
The figures are X in Figure 2, a cross-sectional view of the
Droplets are diagrams for explaining the production method, Figures 6 and 7- are 1
FIG. 3 is a diagram for explaining the detailed description of the present invention. 9'': :, :11' In the figure, l is the main magnetic pole, 2 and auxiliary buttons 13 are for recording and reproduction @@, 4 is a magnetic thin film having perpendicular magnetic anisotropy,
5 is a substrate, 6 is a high magnetic permeability magnetic layer, 7 is a magnetic recording medium, 8 is a non-woven substrate, 9 is a high sulfur content film, 10s
i2 is an electric conductor layer for recording and reproduction, 13 is a protrusion on a non-magnetic substrate, 14 is a resist, 15.16.19
17 indicates the magnetic flux, 17 indicates the medium running direction, and 18 indicates recording magnetization.゛＼− 娑 4 fig. Mourning 5 fig.

Claims (1)

[Claims] Two non-magnetic bases formed with protrusions having 91+rIa'f: □ which approach each other as they move away from the substrate direction.
A film with a high magnetic permeability of 90% is formed on the substrate, and a film of 1.0% is formed on the FC insulating layer on the amorphous film. A magnetic head characterized in that it has a structure in which a conductive material fI is formed so as to surround the protrusion.