JPH0192909A - Magnetic head - Google Patents

Abstract

PURPOSE:To obtain a magnetic head coping with a high coercive force magnetic recording medium with high productivity and high accuracy in the track width by forming a track width regulating slot to at least one high magnetic film. CONSTITUTION:High saturation magnetic flux density magnetic films 3, 3' are formed on a magnetic or nonmagnetic base and track width regulation slots 9, 9' corresponding to the track width are processed to the high saturation magnetic flux density magnetic fluxes 3, 3' prior to the packing of glass 4. Thus, the fluctuation of the track width due to the dispersion of the processing quantity is prevented by the track width regulating slots 9, 9' in finishing the magnetic gap mating face by polish processing after the glass is packed. Thus, the manufacture yield is improved and the magnetic head with high productivity and suitable for high recording density is obtained.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a magnetic head mounted on a magnetic storage device such as a magnetic disk device, and particularly to a magnetic head that can be used in combination with a high coercive force magnetic recording medium. Regarding.

[Conventional technology]

There is a high demand for higher capacity in magnetic storage devices such as magnetic disk drives, and as a result, magnetic recording media are becoming increasingly high in coercive force, and research into high saturation magnetic flux density magnetic materials is also underway for magnetic heads. It is progressing. FIG. 9 is a perspective view of a head core in which a high saturation magnetic flux density magnetic film is formed in order to correspond to a conventional high coercive force magnetic recording medium. head core 1
C core with winding window 6 and ■ core with magnetic gap 5
They are joined together by glass bonding across the two sides, making them a single piece. The C core and the (2) core are formed by forming a high saturation magnetic flux density magnetic film 5.3' of sendust or an amorphous alloy magnetic material by vapor deposition or sputtering on the substrates 2, 2' of magnetic or non-magnetic material. . In this case, it is tilted so as not to be parallel to the magnetic gap 5 in order to prevent the contour effect due to the high saturation magnetic flux density magnetism [3, 3'. Therefore, the magnetic films 5 and 3' on both side surfaces of the head core 10 are
- Glass 4 is filled on both sides of the track width 7 to prevent galling and to increase the bonding force between the C core and the ■ core.

FIG. 10 is an enlarged view of the surface facing the recording medium in FIG. 9.

In the head core 1, the surfaces of the C core and I core that face each other across the magnetic gap 5 are polished to a mirror surface so as to have a track width of 7, but there are sloped surfaces on both sides of the magnetic films 3 and 5'. Because of this, it is difficult to match the core width of 8° 8' and the track width of 7 due to variations in the amount of processing.

Misalignment may occur when the C core and the (2) core are joined, resulting in a significantly poor manufacturing yield.

Incidentally, related to this type of heradocore, for example, Japanese Patent Application Laid-Open No. 59-207415 can be mentioned.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not give consideration to productivity when manufacturing a head core by forming a high saturation magnetic flux density magnetic film on a magnetic or non-magnetic substrate, resulting in poor track width accuracy and lower manufacturing yield. There was a problem of lowering the

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic head that overcomes these drawbacks and can be used with high coercive force magnetic recording media with high productivity and good track width accuracy.

[Means for solving problems]

The above purpose is to process a track width regulating groove corresponding to the track width in the high saturation magnetic flux density magnetic film after forming the high saturation magnetic flux density magnetic film on a magnetic or non-magnetic substrate and before filling the high saturation magnetic flux density magnetic film with glass. achieved.

[Effect]

After cutting a track width regulating groove perpendicular to the magnetic gap surface into a high saturation magnetic flux density magnetic film formed on a magnetic or non-magnetic substrate and filling it with glass, when finishing the magnetic-gap mating surface by polishing. The track width regulating groove can prevent variations in the track width due to variations in the amount of processing.

[Example] □ An example of the present invention will be described below with reference to FIGS. 1 to 8.

FIG. 1 is a perspective view of a helad core according to an embodiment of the present invention, and FIG. 2 is an enlarged view of the surface facing the recording medium in FIG. 1. The head core 1 is made up of a C core having a winding window 6 and one core joined by a glass 4 with a magnetic gap 5 in between. The magnetic gap 5 is made of a non-magnetic material such as SiO2 or glass. The C core and I core are formed by depositing or sputtering high saturation magnetic flux density magnetic films 3 and 3' on the substrates 2 and 2' of magnetic or non-magnetic material, respectively, and then forming the core width 8 of the C core and I core. ,8'
is stipulated.

Track width regulating groove 9°9' so that the track width is 7.
It is processed. The groove depths 10 and 10' may be such that when the C core and the echo core are joined through the magnetic gap 5, there is no effect on recording and reproduction, for example, 100 μm or more.

Next, an embodiment of the method for manufacturing a herad core according to the present invention will be described with reference to FIGS. 4 to 8. FIG. 4 is a processed perspective view of the magnetic or nonmagnetic substrate 2 of the C core.

As a measure to prevent the contour effect caused by the groove processing for the winding window 6 and the contour effect caused by the high saturation magnetic flux density magnetic film on the side where the high saturation magnetic flux density magnetic film is formed, an inclination is made so as not to be parallel to the magnetic gap surface. The protrusion forming grooves 11 and 12 are processed. In addition, in the case of the board 2' of the core, only the grooves of winding 11!6 (, protrusions, protrusion forming grooves, if, 12) are processed. This is a diagram in which a high saturation magnetic flux adhesion magnetic film 5 is formed by vapor deposition, sputtering, etc. In this case, the magnetic film 5 may be formed as a single layer film of only magnetic material, or may be formed of a single layer of magnetic material only. In order to improve the high frequency characteristics of the multi-layer structure, the intermediate layer may be laminated with a non-magnetic material such as 5 ozOz interposed therebetween.

FIG. 6 is a diagram showing track width regulating grooves 9 formed in the magnetic film 3. As shown in FIG. The track width regulating groove 9 is processed so that the core width 8 has the same dimension as the track width and the core pitch 13 has a specified dimension.

The track width regulating groove machining depth 14 may be such that the groove depth dimension 1o after polishing of the magnetic gap surface does not affect the recording and reproducing characteristics. Furthermore, if a multi-cutter is used to process the track width regulating grooves, the cutting can be done with good precision and manufacturing efficiency can be improved. FIG. 7 is a diagram showing the glass 4 filled after track width groove processing. This glass 4 acts as a bonding material to prevent peeling of the magnetic film and to bond the C core and I core via a magnetic gap. The surface of the magnetic gap mating surface is finished to a surface with good surface precision by polishing and the like up to the point where the track width regulating groove 9 acts (ta line surface at one point in FIG. 7). Next, SiO2 or glass for forming the magnetic gap 5 is formed on the mating surfaces of the C core and the I core by sputtering, etc., and as shown in FIG. and each other's core width 8,8'
Position the glass so that it has the specified track width 7, and
Join by. In this case, 5 as the magnetic gap material
Since iCh is diffused into the glass, there is no particular problem during bonding. Next K, one point B1 and B2 in Figure 8 [1
The head core can be made by cutting with a slicer etc. as shown in .

Next, FIG. 6 shows an enlarged view of the surface facing the recording medium in another embodiment of the present invention. Of the C core and ■core that make up the head core 1, a track width regulating groove 9' is machined so that the core width 8' on the ■core side becomes the specified track width 7, and the groove depth 10' is used for recording and reproduction. The amount is set so that it does not affect the characteristics. The core width 8 on the C core side is thicker than the core width 8' of the core. In this case, the track width 7 is the width where the core widths 8 and 8' of the C core and Ecore overlap. To become
When joining the C core and the eco core through the magnetic gap 5, even if the water positions are shifted from each other, the core width 8' of one core is located within the width of the core width 8 of the C core.

If so, the track width 7 will not fluctuate.

〔Effect of the invention〕

According to the present invention, it is possible to eliminate fluctuations in the core width and track width that occur during magnetic gap surface processing, and also to suppress fluctuations in the track width that occur when the C core and the echo core are brought together, thereby improving manufacturing yield. This has the effect of providing a magnetic head suitable for high recording density with high productivity and high productivity.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a herad core according to an embodiment of the present invention, and FIG.
The figure is an enlarged view of the recording medium facing surface in FIG. 1, FIG. 3 is an enlarged view of the recording medium facing surface in another embodiment of the present invention, and FIGS. 4 to 8 are manufacturing of the head core shown in FIG. 1. An explanatory diagram of one embodiment of the method, FIG. 9 is a perspective view of a conventional herad core, and FIG.
Figure U is an enlarged view of the surface facing the recording medium in Figure 9. 1...Head core, 2...C core board, 2'...
・■ Core substrate, 3, 3'... High cell sum magnetic flux density magnetic film, 4... Glass, 5... Magnetic gap, 6...
・Volume Is2.7... Track width, 8, 8'...
Core width, 9, 9'...Track width regulating groove, 10
, in'...Groove depth, 11, 12...Protrusion forming groove, 13...Core pitch. Representative Patent Attorney Masaru Ogawa Ogawa 1st Country 2nd Edition] Monko 4th, 5th, 5/2/l Meotnua 71El Riko 8I! l

Claims (1)

[Claims] 1. In a magnetic head in which a highly magnetic film is formed on a magnetic or non-magnetic substrate to form a magnetic path, the heads face each other across a magnetic gap. A magnetic head characterized in that a track width regulating groove is formed in at least one highly magnetic film at substantially right angles to a magnetic gap.