JPS5972638A - Manufacture of composite magnetic head - Google Patents

Abstract

PURPOSE:To attain mass-production with low cost and high accuracy, by providing again plural grooves crossed with a gap section to an alloy magnetic member, inserting a nonmagnetic projection and working it, after the nonmagnetic member is inserted and fixed to the plural grooves of the alloy magnetic member block. CONSTITUTION:A gap 13 is formed to a pair of alloy magnetic blocks 11, 12 processed into prescribed shape and size, they are bonded by a low melting point glass to form a front core block 10. The core block 10 is provided with plural grooves 14 crossing with the gap 13. Further, a nonmagnetic block 20 of the prescribed shape and size is provided with grooves 21 inserted to the grooves 14. The core block 10 and the block 20 are mated and bonded. The block 20 on the surface of the core block 10 is removed by cutting. The alloy magnetic thin film core having a prescribed track width is obtained easily by repeating the process. After bonding a back core 30 of prescribed size and shape and processing it, the mass-production at low cost and with high accuracy is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite magnetic head used for recording and reproducing magnetic heads such as V T r The present invention relates to a method of manufacturing a composite magnetic head in which 1 q of magnetic heads can be easily reduced.

Recently, in magnetic heads for recording and reproducing high frequency signals such as video information on high coercive force recording media such as so-called metal Dave, a sharp center of saturation magnetic flux density,
Various alloy magnetic materials such as amorphous and permalloy are used.

When this alloy magnetic material is used to construct the conversion gap core of a magnetic head, the core thickness must be minimized to prevent the adverse effects of the skin effect, and the strength and wear resistance must be From this point of view, it is considered that a magnetic head having a structure in which a thin film core made of an alloy magnetic material is reinforced with non-magnetic materials on both sides is optimal.

However, as shown in FIG.
) has a thickness of 10 to 30 um, and the non-magnetic reinforcing member (2) + 31 with a predetermined thickness is laminated on both sides. It is extremely difficult to process it into a thin film and to flatten the joint surface with high precision. In addition, the magnetic path made of a thin film magnetic alloy has a small cross-sectional area, resulting in poor regeneration efficiency.

Regarding this composite magnetic head, Japanese Patent Application Laid-Open No. 5715
The structure and manufacturing method are proposed in Publication No. 216.
, this magnetic head consists of a plate-shaped non-magnetic material bonded to one surface of a high magnetic permeability ferrite block, and a plurality of grooves perpendicular to the non-magnetic material surface of the lζ block (f:l+).
) Fix ten non-magnetic metal magnetic thin strips, cut this composite strip so that the thin strips are parallel to each other, and grind the cut surfaces of the pair of substrates (111) to form a non-magnetic layer. Form and join the intervening gills to form a magnetic head assembly block.
Further, this is cut and ground into a predetermined shape and one dimension to manufacture it.

Therefore, the magnetic head described above requires advanced processing technology to join the pair of composite substrates to form the gear component, and high-permeability metal magnetic thin strips are used as the track cutting method, resulting in high precision. In addition to high-tolerance usage, it is necessary to bend the thin strip, and it is extremely difficult to process a single thin strip with high precision, which poses a problem in mass production.

In view of this problem, the present invention aims to provide a method for manufacturing a composite magnetic head easily and with high precision.

Another object of the present invention is to provide a method for manufacturing a composite magnetic head with a simple structure and improved magnetic properties.

That is, in this invention, the alloy magnetic material block is inserted into the flon 1 with the gap formed through the non-magnetic material.
] Then, install a plurality of grooves intersecting at a specific angle at regular intervals. A plurality of grooves are arranged in parallel at regular intervals to form protrusions. After fitting and fixing the protrusions between the grooves of the non-magnetic material into the grooves of the front core block, remove the front core block. The non-magnetic material block on the surface is removed and the back is machined into a specified shape] The soil surface of the J-A block and the alloy magnetic material block are joined to form a composite magnetic head assembly block, which is further polished to form the desired shape. This is a method for manufacturing a composite magnetic head, the gist of which is cutting and finishing it into a single shape.

Furthermore, after the non-magnetic material is inserted and fixed into the multiple grooves of the alloy magnetic material block, the non-magnetic material is inserted and fixed, and then the alloy magnetic material part is refilled with multiple grooves that intersect at a specific angle with the grooves of the alloy magnetic material block. (), then insert and fix the protrusions between the grooves of the non-magnetic material block prepared separately again, and narrow the width of the non-magnetic alloy magnetic material part, which was inserted and fixed into the non-magnetic core block, to a thin film of, for example, 30uIIl or less. This is a composite magnetic l\\rad manufacturing method that aims to achieve

As shown in FIG. 2, the composite magnetic head according to the present invention has a conversion gear 1? Join the tongues (reinforced parts of non-magnetic material!, l (8) + 9) on both sides of the ini core (6) that formed the force to form the core (4), and
4) is bonded onto an integral back core (5) with no bonding surface, and the magnetic material of the thin film core is a high OP dust alloy with a saturation magnetic flux density, various amorphous tenth alloys, and 1<-malloy alloys. By using a thin film alloy magnetic material such as 100%, this together with the magnetic saturation of the gap region is avoided, and the influence of the skin effect is reduced, and the magnetic material of the back core is free from high frequency loss. u'tin-Zn system with a small amount of N
, -Use rough 1-fly ■fly 1~ of Zn-based etc.,! Long path...By increasing the i area, the regeneration rate is 1rl
It is a composite magnetic head with 51 magnetic heads, and furthermore, the manufacturing method according to the present invention does not require any advanced 7J11 engineering technology, and can be produced with high precision at low cost. .

Further, the composite head +, t, tt according to the present invention
Alloy magnetism of the thin film core forming the i-circuit (-X″X of 4
11 tachi welding is possible regardless of the welding accuracy of 7tsupu 5, )\
Since it is possible to use the integrated rough 1 to ferrite 1 with low high-frequency loss for the shaft 7, a sharp improvement in magnetic properties can be obtained.

In addition, the reinforcing material that is bonded to the membrane 2A can be bonded not only to both sides, but also to only one side as shown in Figure 3.
Good too.

Furthermore, the plurality of grooves for inserting and fixing the non-magnetic material into the core block 7 may be provided either on the recording medium sliding side surface of the front 1 to core block, or on the opposite side surface as shown in the embodiment. .

Hereinafter, the manufacturing method according to the present invention will be described based on the drawings.
T says. FIG. 4 is an explanatory diagram showing one step of manufacturing a composite magnetic head according to the present invention.

A pair of alloy magnetic material blocks (11) and (12) that have been processed into a predetermined shape τ1 are sputtered onto their joint surfaces by sputtering, etc. For example, a 5102 glass film is coated with Jz to a predetermined length. A gap part (13) with a J is formed, J is joined to the low melting point glass, and a front lower block (13) is formed.
(1) Tonat (, Figure a). Alternatively, instead of the glass film, a glass foil plate of a predetermined thickness may be interposed to form the lug portion.

Next, attach the [I] knob L1 (10) to the above front
A plurality of parallel grooves (14) intersecting at a specific angle are provided on the knob (13). Here, if the back contact surface < 30), which joint surface is sticky, or if the recording medium sliding surface flops after assembly, a full (14) is set on the opposite surface (Figure b).

On the other hand, a non-magnetic material block (2
(21) are also provided at regular intervals (parallel) on the vortex (21) (21). ) groove (1
4) Set the groove width and groove spacing so that it can fit into the groove (see Figure 0).

Front core block (10) and non-magnetic material block (2)
0) and (1-), insert the protrusion between the grooves (22) into the groove (14) of the cock (10), and secure with resin, glass, etc. (Fig. 6).

After that, the surface of Freon 1 core block (10).

Cut and remove the remaining non-magnetic material block (20) in (Figure e).

Therefore, the track width of the groove portion formed in the core block (10) to the Freon 1 is the same as that of the reinforcing non-magnetic material (22') (22') fitted and fixed in the groove (14).
) is composed of the thickness of the alloy magnetic material sandwiched between the
By repeating the melting process as shown in Figures 1', 1', and 1'I above, it is possible to easily form an alloy magnetic material thin film core with a predetermined track width.

Next, the surface of the notebook core block (10) is polished and finished (Figure 1).

-h, the back core block (30) is machined +i++ to a predetermined shape and size from a magnetic material block, and the soil surface that will become the joint surface is ground (dt) (Figure 9).

A reinforcing non-magnetic material (22') is attached to this back core (30).
) is 71'nt] A (10) of the side that was held in a fixed position.
They are joined with resin, glass, etc. to form a composite magnetic head assembly. The upper surface of the front core of this assembly is polished on eight sides until the composite layer formed of the alloy magnetic material layer and the nonmagnetic material layer is exposed. Furthermore, this assembly is cut at a specific angle with respect to the gap in the front core to create an assembled chip (Figure 1).

Examples according to the present invention will be described below.

In the alloy magnetic material block, Fe84.3wt%, M6,
0wt%, SL9, 7w1% Senges 1 ~ alloy was used, and the gap forming surface was 0.15ρ of S, 0. A sputtered film was applied, and a low melting point glass with a softening temperature of 300°C and a thermal expansion coefficient of +30X 10-4 /°C was used as a welding reinforcing material, and a gap length of 0.31iJn was assembled into the core block. .

Next, cut a groove of 0.25 mm in width and 0.4 mm in depth into this front core 1 block at an angle of 90° to the gap so as to obtain the required ball hide.
Arranged at a pitch of 5 nuns.

The non-magnetic material block contains TiO, 80wt%, BaO
A barium titanate material consisting of 20 wt% was used to form a protrusion between the grooves that fit into the groove of the front core block, and the protrusion had a thickness of 0.245 mm and a height of 0.5 mm.
.

0.55. Create grooves with mm pitch.

The flon 1~ core block and the non-magnetic material block were put together, the protrusion between the grooves was fitted into the groove of the flon core block, and the resin C' was fixed. After that, the remaining non-magnetic material block on the surface of the front core block was removed.

ノ [1 1 - 7 b [-1 The rack width of the top part formed in the ivy is the reinforcing non-magnetic f [1 to 1 of the magnetic moon that is sandwiched in the shrine] which is inserted into the groove and fixed. Since it is configured by the thickness, by repeating the above steps again, 20. A thin film core of an alloy magnetic material having an aml-rack width was formed. I finished wrapping the surface of the ``Jn1he'' Aburo ivy.

Ichiriki, back” Arplock has tlno 17.3
wt%.

A 1'''In Zn ferrite flock J consisting of Zn012.6wt% and Fe2O270.1wt% was machined into a predetermined shape, and the upper surface, which would be the bonding surface, was knipped once. The front core on the side where the reinforcing non-magnetic material is inserted and fixed is bonded with resin to form a composite magnetic head assembly. R(σ]1?) until the composite layer formed is exposed.
Shita. First, -U for the gap between Freon 1 and the core.
The assembly was cut at a 90' angle and raised 11 to the assembly tip.

In the example, Mn-Zn-based sonotonolie with low high frequency loss was used as the magnetic material of the back core, and
By increasing the cross-sectional area, a composite magnetic head with improved magnetic properties and reproduction efficiency of 30% or more compared to conventional composite magnetic heads was obtained. 1 Furthermore,
The manufacturing method according to this invention has eight parts in the front core block.
The track width of the groove formed by the groove is determined by the thickness of the alloy magnetic material sandwiched between the reinforcing non-magnetic material fitted into the groove, so there is no need for any advanced loading technology and the track width is low. ] It was possible to produce lead with high accuracy.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional composite magnetic head, FIGS. 2 and 3 are perspective views of a composite magnetic head according to the present invention, and FIG.
FIG. 1 is a process explanatory diagram showing a method of manufacturing a magnetic head according to the present invention. In the figure, 10... Freon 1 to core block, 41.12
...Magnetic material [1 hook, 13...Gi 1r knob part, 1
4.21... Vortex, 20... Non-magnetic M: +A-/'
t: +Tsuku, 22... Protrusion between grooves, 22'... Non-1 for reinforcement! j t'J'-14,3o... Back lower block. Out (head person (,1 Yu Special Kinku Co., Ltd.)
1"3 9';'-!:I",j (゛ノFigure 1Figure 2Figure 3j (b) (・) 4Figure

Claims (1)

[Claims] 1. Alloy magnetic material [knock is applied via non-I41 material]
A plurality of grooves intersecting at a specific angle with respect to the gap portion are provided at regular intervals on the front core block 1 to the core block in which the 771 part is formed, and on the other hand, the front core block is completely fitted into the non-magnetic material block. To form the protrusions, multiple grooves are placed in parallel at regular intervals (after inserting and fixing the inter-groove protrusions of the non-magnetic material block into the grooves of the front block) The non-magnetic material block on the back core block was removed, and the two-sided alloy magnetic material block of the back core block processed into a predetermined shape was joined to form a composite magnetic head assembly block. A method for manufacturing a composite magnetic head characterized by machining and increasing the required cutting ILC. 2. After inserting and fixing a non-magnetic material into a plurality of grooves in an alloy magnetic material block, In the non-magnetic forest that has been inserted and fixed, multiple grooves are made again in the gap section, intersecting at a specific angle, in the alloy magnetic material part. 11 The width of the alloy magnetic material part between the non-magnetic materials fitted and fixed in the front block has been narrowed.
1. A method for manufacturing a composite magnetic head according to claim 1.