JPH02218009A - Magnetic head and manufacture of magnetic head - Google Patents

Abstract

PURPOSE:To remove a gap between an erase gap and magnetic material by joining the butting surface of a magnetic core to the surface of the magnetic material and the surface of a non-magnetic film. CONSTITUTION:Plural trapezoidal shape grooves 31 are formed in parallel on the surface 30a of core material 30, and the non-magnetic film 32 is formed. A magnetic film 33 is formed on the surface of the film 32 so as to be elevated higher than the surface of the core material 30 adjacent to the groove 31. The non-magnetic film 16 and the magnetic material 20 are formed by cutting and grinding the core material 30. Then, the non-magnetic film 14 to be a recording/ reproducing gap 15 is formed on the surface of the core material 30 adjacent to the exposed groove 31 so as to be thinner than the film 16. After that, a recessed part 36 is formed, and the magnetic core 10 is obtained. A magnetic head is obtained by fixing a rectangular parallelepiped-shaped magnetic core 11 to this core 10.

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION J Field of the Invention This invention relates to a magnetic head for a flexible magnetic disk and a method for manufacturing a magnetic head.

``Prior art'' Conventionally, as an example of this type of magnetic helix, there has been
The one described in Japanese Patent No. 139123 is known.

As shown in FIG. 3, in this magnetic head, a magnetic gap 4 is formed by interposing a nonmagnetic film 3 between a pair of magnetic cores 1.2, and this magnetic gap 4 is used for recording rlI. It consists of a raw gap 5 and a V-shaped erase gap 6.6 extending obliquely from both ends of the recording/reproducing gap 5 toward one magnetic core l side.

To manufacture a magnetic head with such a configuration, Si is applied to the abutting surface 1a of one of the magnetic cores 1 by sputtering or the like.
This is carried out by forming a non-magnetic film 3 such as 1.n, etc., and bonding this non-magnetic film 3 to the abutting member 2a of the other magnetic core 2.

[Problems to be Solved by the Invention] However, in the magnetic head described above, since the abutting point 1a forming the erasing gap 6 of the magnetic core 1 is inclined, the sin, etc. formed by sputtering on this portion is inclined. It is difficult to form the non-magnetic film 3 into the shape exactly as designed, that is, it is difficult to make the shape of the surface of the non-magnetic film 3 exactly the same as the shape of the butt joint 2a of the other magnetic core 2 to be joined. It is. Therefore, in order to prevent an unnecessary gap from occurring between the abutting surface 2a of the magnetic core 2 and the non-magnetic film 3, causing a malfunction of the magnetic head, and to prevent the formation of unnecessary gears and discs, it is necessary to It is necessary to correct the abutting surface 2a of the core 2 in accordance with the shape of the non-magnetic film 3, which causes the problem that the shape of the magnetic core 2 becomes complicated.

An object of the present invention is to provide a magnetic head and a method of manufacturing the magnetic head that can solve these problems.

"Means for Solving the Problems" In order to achieve the above object, the magnetic head of the present invention has the following features:
In a magnetic head, the erase gap is formed on the abutting surfaces of a pair of magnetic cores, and includes a recording/reproducing gap and an erasing gap extending obliquely from both ends of the recording/reproducing gear toward one of the magnetic cores. On the non-magnetic film,
A magnetic material is formed so that its surface is a plane parallel to the recording/reproducing gap, and an abutting surface of the other magnetic core is placed between the surface of the magnetic material and the surface of the nonmagnetic film forming the recording/reproducing gap. It is made by joining.

Further, in the method for manufacturing a magnetic head of the present invention, a plurality of trapezoidal grooves are formed in parallel to each other on the surface of a core material made of a magnetic material, and then a non-magnetic film is formed on the surface of the core material including the grooves. A magnetic film is formed on the surface of the non-magnetic film to be higher than the surface of the core material, and then the non-magnetic film and the magnetic film are formed on the surface of the core material adjacent to the groove. By cutting and removing the magnetic film, a magnetic material is formed flush with the surface of the core material, and by forming a non-magnetic film on the surface of the core material adjacent to the grooves exposed by cutting and removing, a recording/reproducing gap is formed. It is something that forms.

"Function" In the magnetic nodule of the present invention, a magnetic material is formed on the non-magnetic film forming the erase gap so that its surface is a plane parallel to the recording/reproducing gap, and the surface of the magnetic material is Since the abutting surface of the other magnetic core is bonded to the surface of the non-magnetic film forming the recording/reproducing gap in item 1, no gear is formed between the erase gear or the magnetic material, and (1) No gap is created between the surface of the magnetic material and the abutting surface of the other magnetic core.

Further, in the method for manufacturing a magnetic head of the present invention, on the inner surface of the plurality of trapezoidal grooves formed on the surface of the core material,
An erase gap made of a non-magnetic film is formed, and a magnetic film is formed on the surface of this erase gap higher than the surface of the core material.
Since the magnetic material was formed by cutting and removing this magnetic film flush with the surface of the core material, there is no gap between the erasing gear or the magnetic material and the surface of the magnetic material, i.e., the other surface. Since the joining surface with the magnetic core can be made into an accurate plane as designed, no gears or gaps will occur between the abutting surface of the other magnetic core and the magnetic material.

"Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to FIG. 1 and FIGS. 2(a) to (g).

FIG. 1 is a perspective view showing the vicinity of the gap between the magnets and the magnet, and reference numerals 10 and 11 in the figure indicate a pair of magnetic cores formed to face each other.

The abutting surface 12 of one magnetic core 10 includes a parallel surface 1.2a parallel to the thickness direction of the magnetic head, and a parallel surface 1.2a parallel to the thickness direction of the magnetic head.
It is composed of inclined surfaces 12b, 12b, which are V-shaped in plan view and extend C from both edges of the magnetic core 10 toward the magnetic core 10.

A nonmagnetic film 14 made of a nonmagnetic material such as 5iOz or SiO is formed on the parallel surface 12a, and this nonmagnetic film 14 constitutes a recording/reproducing gear 15. Further, on the inclined surfaces 12b, 12b, a nonmagnetic film 16°1 made of the same nonmagnetic material as above and thicker than the nonmagnetic film 14 is provided.
6 are formed, and these non-magnetic films 16 and 16 constitute an erase gear, 17 and 17.

On the other hand, the abutting surface 11a of the other magnetic core 11 is a surface parallel to the thickness direction of the magnetic head.
1 is adhesively bonded at its center in close contact with the surface of the nonmagnetic film 14.

Further, between the abutting surface 11a and the non-magnetic film 1616, a magnetic material 20° 20 having a triangular cross section made of sendust, permalloy, amorphous, etc. is provided on the abutting surface 11a.
a and the nonmagnetic films 16 and 16 in close contact with each other. This magnetic material 20 is a non-magnetic film 16, as will be described later. It is formed on the surface of 16 by sputtering or the like, and is joined to the abutting surface 11a.

Next, a method of manufacturing the magnetic head having the above structure will be explained.

First, as shown in FIGS. 2(a) and 2(b), a plurality of trapezoidal grooves 31 are formed parallel to each other on the surface 30a of the core material 30 made of a quadrangular columnar magnetic material.

Next, as shown in FIG. 2(c), a nonmagnetic film 32 made of Sin or SiO is formed on the surface of the core material 30 by sputtering. The thickness of this non-magnetic film 32 is made equal to the thickness of the erasing gear/bulb 17.

Next, as shown in FIG. 2(d), a magnetic film 33 made of a high magnetic permeability Ta material such as sendust, permalloy, amorphous, etc. is formed in the grooves on the surface of the non-magnetic film 32 by sputtering, vapor deposition, concentrated dissolution, etc. 31 is formed higher than the surface of the core material 30 adjacent to it. The surface of the magnetic film 33 thus formed is uneven.

Next, the core material 30 on which the non-magnetic film 32 and the magnetic film 33 have been formed is cut and polished along the line 81 shown in FIG. The nonmagnetic film 32 and magnetic film 33 that have been removed are removed, thereby forming the nonmagnetic film 16 and magnetic material 20. (See Figure 2(e)) Then, the groove 3 exposed by cutting away
5i on the surface of the core material 30 adjacent to 1 by sputtering etc.
nt.

Alternatively, the nonmagnetic film 14 made of SiO may be used as the nonmagnetic film 16.
To form a book.

Thereafter, the core material 30 processed as described above is sliced along the line indicated by S in FIG. 2(e), and a recess 36 is formed therein as shown in FIG. 2(r). By doing so, the magnetic core 10 is formed. And Fig. 2(g)
As shown in the figure, a magnetic core is manufactured by attaching a separately formed rectangular parallelepiped magnetic core made of a magnetic material to this magnetic core. Note that the abutting surface 12 of the magnetic core 10 is formed by forming the non-magnetic film 14 on the surface of the core material 30 adjacent to the groove 31 that has been cut and removed, so that the surface of the magnetic material 20 is on the surface of the non-magnetic film 14. Although it is slightly recessed, since a magnetic film is formed by sputtering on the part of the magnetic core 11 corresponding to this part, the above-mentioned magnetic core 10
and 11 are joined without any gaps.

Further, in the above embodiment, the core material 30 on which the nonmagnetic film 32 and the magnetic film 33 are formed is shown at 81 in FIG. 2(d).
After cutting and polishing along the line shown in
Although the non-magnetic film 14 of No. 5 was formed, the non-magnetic film 14 may be formed by polishing along the line shown by S3 without measuring the thickness of the non-magnetic film 32. In this way, no step is created between the nonmagnetic film 14 and the magnetic material 20.

According to the above embodiment, on the surface of the core material 30,
A plurality of grooves 31... are formed parallel to each other, and these grooves 3
The erase gear 17 is formed by forming a non-magnetic film 32 on the surface of the core material 30 containing I..., and the non-magnetic film 3
2, the magnetic film 33 is formed higher than the surface of the core material 30, and then the non-magnetic film 32 and the magnetic film 33 formed on the surface of the core material 30 adjacent to the groove 31 are removed by cutting. The recording/reproducing gap 15 is formed by forming the material 20 flush with the surface of the core material 30 and forming a nonmagnetic film 34 on the surface of the core material 30 adjacent to the groove 31 exposed by cutting away. The core material 30 processed in this manner is sliced along the line indicated by S in FIG. 2(e), and four parts 36 are formed thereon as shown in FIG. The core 10 is formed, and the abutting surface 11. Since the a is joined, there is no gap between the erasing gear, the tab 17, and the magnetic material 20, and there is no gap between the abutting surface 11a of the other magnetic fan 11 and the magnetic material 20. There is no.

Effects of the Invention J As explained above, according to the magnetic head and the method for manufacturing a magnetic head of the present invention, a plurality of trapezoidal grooves are formed in parallel to each other on the surface of a core material made of a magnetic material. , an erase gap is formed by forming a non-magnetic film on the surface of the core material including the groove, a magnetic film is formed on the surface of the non-magnetic film higher than the surface of the core material, and then the core adjacent to the groove is By cutting and removing the non-magnetic film and magnetic film formed on the surface of the material, a magnetic material is formed flush with the surface of the core material, and a non-magnetic material is formed on the surface of the core material adjacent to the grooves exposed by cutting away. A recording/reproducing gap is formed by forming a magnetic film, and the abutting surface of the other magnetic core is bonded to the surface of the magnetic material and the surface of the non-magnetic film forming the bipedal recording/reproducing gap. There is no gap between the gap and the magnetic material, and the surface of the magnetic material, that is, the joint surface with the other magnetic core, can be made into an accurate W shape as designed, so that the other magnetic core does not penetrate. There is no gap between the mating surface and the magnetic material.

[Brief explanation of the drawing]

1 and 2(a) to 2(g) are for explaining one embodiment of the present invention, FIG. 1 is a perspective view of the main part of the magnetic head, and FIGS. 2(a) to 2(g) are (g) is for explaining the process of manufacturing the magnetic helix, and Fig. 2 (a)
) is a perspective view of the core material, (1)) is a perspective view of the core material with grooves formed, (c) is a cross-sectional view showing a state in which a non-magnetic film is formed on the core material, and (d) is a perspective view of the core material. A cross-sectional view showing a state in which a magnetic film is formed, (e) a cross-sectional view showing a state in which a part of the magnetic film is removed, (f) a perspective view of a magnetic core, and (g) a side view of a magnetic head. FIG. 3 is a plan view of the main parts of a conventional magnetic head. 10... One magnetic core, 11... Other magnetic core, 11a... Butting surface, 12... Butting, 14... Non-magnetic film, 15...
Recording and reproducing gear, 16...Non-magnetic film, 17.
... Erasing gap, 20 ... Magnetic material, 30
... Core material, 31 ... Groove, 32 ...
・Non-magnetic film, 33...Magnetic film, 34...
・Non-magnetic film.

Claims (2)

[Claims] (1) A magnetic gap is formed on the abutting surfaces of a pair of magnetic cores with a non-magnetic film interposed between them, and this magnetic gap forms a recording/reproducing gap and an inclination from both ends of the recording/reproducing gap toward one magnetic core. In the magnetic head configured with a V-shaped erasing gap that extends as shown in FIG. A magnetic head characterized in that an abutting surface of the other magnetic core is bonded to the surface of the magnetic material and the surface of the nonmagnetic film forming the recording/reproducing gap. (2) forming a plurality of trapezoidal grooves parallel to each other on the surface of a core material made of a magnetic material, and then forming an erase gap by forming a non-magnetic film on the surface of the core material including the grooves; A magnetic film is formed on the surface of the non-magnetic film at a height higher than the surface of the core material, and then the non-magnetic film and the magnetic film formed on the surface of the core material adjacent to the groove are cut and removed. Manufacture of a magnetic head characterized in that a recording/reproducing gap is formed by forming a nonmagnetic film on the surface of the core material adjacent to the groove that is formed flush with the surface of the core material and exposed by cutting away. Method.