JPH0383208A - Production of magnetic head - Google Patents

Abstract

PURPOSE:To enhance the precision of a magnetic gap by forming a glass film by sputtering on the front part of at least one ferrite cores which face to each other through the magnetic gaps at front and back parts thereof, joining both cores by heating, and reinforcing the inside of the front gap with an org. adhesive. CONSTITUTION:A film 6 comprising borosilicate glass, lead glass, etc., is formed on the gap surface of the front part 1a of a core 1 by sputtering. The core 1 is then made to face to a slider 2, to which a glass fillet for back gap having lower softening point than that of the film 6 is provided on the contact point between the back part 1b and the slider 2. The core is heated to joint the core to the slider and the back part 1b to the slider with the glass 8 to form the back gap 4. The film 6 is softened to adhere to form the front gap 3, into which an epoxy adhesive 9 is poured, heated at 50 - 200 deg.C and cured to form the reinforcing member 10. Thereby, the obtd. head has high output with a narrow gap and short depth.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of manufacturing a magnetic head for recording and reproducing information on a magnetic recording medium such as a magnetic disk device or a magnetic drum device.

(Prior Art) A conventional magnetic head will be described with reference to FIGS. 3 to 5, taking a floating monolithic magnetic head as an example.

FIGS. 3(a) and 3(b) are a perspective view and a side view of a conventional magnetic head, in which a C-shaped core 1 and a slider 2 having three sliding bars 28 on the top surface are connected using ferrite. The core 1 is fixed to the front surface of the three central sliding bars 2a through the front gap 3 and the back gap 4, and the core 1 is attached to the slider using the reinforcing glass 5 inside the front gap 3. It is fixed at 2.

A method of manufacturing a magnetic head having such a structure will be explained with reference to FIG.

FIGS. 4(a) to 4(c) are enlarged side sectional views of main parts showing the manufacturing method in the order of steps, and are drawn with the sliding bar 2a at the bottom.

First, on the gap surface of the front part 1a of the core 1.

After forming the sputtered film 6 (fourth (1(a)), the core l
are butted against the front of the slider 2, and a reinforcing glass gob 7 and a back gap glass gob 8 are placed between the front part 1a and the slider 2 and between the back part 1b and the slider 2, respectively (FIG. 4(b)). ), temperature 400℃
The above glass blocks 7 and 8 are melted in a heating furnace at a temperature of 800 to 800°C to form a front gap 3 and a back gap 4. At the same time, the core is bonded to the slider 2, and a reinforced glass 5 is attached inside the front gap 3. via core 1
and fixed to the slider 2 for reinforcement (Fig. 4(c)).

(Problems to be Solved by the Invention) However, in the above manufacturing method, the reinforcing glass gob 7
Since the reinforcing glass 5 is heated to a temperature of 400° C. to 800° C. and melted, the reinforcing glass 5 diffuses into the sputtered film 6 and bubbles are generated, as shown in FIG. There was a problem in that the gap width became unstable due to the intrusion of the particles.

Further, there is a problem in that the reinforcing glass 5 is diffused near the inner corner of the gap surface of the front portion 1a, which is most important for head output, and forms a rounded surface, resulting in a decrease in output.

The present invention solves the above problems and provides a method for manufacturing a magnetic head with high magnetic gap accuracy, narrow gap, short depth, and high output.

(Means for Solving the Problems) In order to solve the above problems, the present invention separates the bonding and reinforcing of the core and the slider into separate steps, and uses an organic adhesive as a reinforcing agent.

(Function) The sputtered film 6 of the core 1 is formed at a temperature of 400°C to 800°C.
The core 1 is softened by heating, and the gap disappears at the same time as the core 1 is bonded to the slider 2. Therefore, even if an organic adhesive is poured and cured at a temperature of 50°C to 200°C, it will not flow into the front gap 3, and will not diffuse into the ferrite of the core 1 and corrode the inner edge of the front gap. Nor.

Therefore, a high-output magnetic head with high magnetic gap accuracy, narrow gap, and short depth can be obtained.

(Example) An example of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is an enlarged sectional view of the main parts showing the manufacturing method of the magnetic head according to the present invention in the order of steps. The completed magnetic head has the same structure as the conventional example shown in FIG. Proceed with the explanation.

First, on the gap surface of the front part 1a of the core 1.

Sputter 11 made of borosilicate glass, lead glass, etc.!
A 6 is formed (FIG. 1(a)). Next, the core 1 is butted against the slider 2, and a back gap glass whose softening point is lower than that of the sputtered film 6 is placed at the joint between the back portion 1b and the slider 2. When the lump 8 is placed (see the upper figure (b)) and the core l is bonded to the slider 2 by heating and melting, the above-mentioned glass lump 8 for the back gap is formed by bonding the back part 1b and the slider 2 and forming the back gap 4. Further, the above sputtered film 6 is softened and bonded to form a front gap 3 (
Figure 1 (C)). Next, inside the front gap 3 mentioned above.

Pour the epoxy adhesive 9 (see the upper diagram (d)) and heat it to a temperature of 50°C to 200°C to harden the reinforcing material 10.
(Figure 1 (e)).

Note that the adhesive 9 described above does not have the property of diffusing into the ferrite forming the core 1 or the glass forming the front gap 3, and has high viscosity, so it cannot be sputtered as shown in FIG. It also invades the abutting surfaces of the membrane 6 and slider 2, forming a reinforcing material 10 with strong adhesive properties.

(Effects of the Invention) As explained above, according to the present invention, the front gap is formed of a sputtered film, so a highly reliable method of manufacturing a magnetic head can be obtained. Therefore, the precision of the magnetic gap is high, and the gap is narrow.

A short depth, high output magnetic head can be obtained.

[Brief explanation of drawings]

1(a) to 1(e) are enlarged sectional views of main parts showing the manufacturing method of a magnetic head according to the present invention in order of steps, FIG. 2 is an enlarged sectional view of the front gap portion of a completed magnetic head, and FIG. Figures (a) and (b) are a perspective view and a side view of a magnetic head common to the conventional example related to the present invention, and Figure 4 (a).
C) is an enlarged side sectional view of the main part showing the conventional manufacturing method in the order of steps, and FIG. 5 is an enlarged sectional view of the front gap portion for explaining the problems of the magnetic head. 1 ゛...Core, la...Front part, 1b...
...Back part, 2...Slider, 2a...
Sliding crosspiece, 3... Front gap, 4...
Back gap, 5...Reinforced glass, 6...
Sputtered film, 7... Reinforcing glass lump, 8...
Glass block for back gap. 9...Adhesive, 10...Reinforcement material.

Claims (1)

[Claims] At least one front part of the ferrite core faces each other through a magnetic gap between the front part and the back part,
A method of manufacturing a magnetic head in which a glass film is formed using a sputtering method, the two are butted together and bonded by heating, and then the inside of the front gap is reinforced with an organic adhesive.