JP2610836B2 - Manufacturing method of magnetic head - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a magnetic head such as a bulk type magnetic head for performing magnetic recording and reproduction on a magnetic recording medium such as a floppy disk drive (FDD). ,
In particular, the present invention relates to control of a gap interval between a read / write core and an erase core.

[Conventional technology]

Conventionally, for example, a core constituting a bulk type magnetic head corresponding to FDD is bonded by pouring an organic adhesive or glass with a spacer having a fixed thickness between a read / write core and an erase write core. The method has been adopted.

[Problems to be solved by the invention]

In the method of manufacturing such a magnetic head, since the gap interval is set by combining the three points of each core and the spacer, the dimensional error is large, the accuracy of setting the gap interval is reduced, and the strength of the joint is low. There are drawbacks such as difficulty in joining work.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method of manufacturing a magnetic head in which the accuracy of a gap interval and the strength of a joint portion are increased and work is facilitated.

[Means for solving the problem]

The method of manufacturing a magnetic head according to the present invention is shown in FIG.
And (B), a concave portion is formed on the side of the center core block of the read / write block 4 or the erase core block 6 in which the gap 2 is formed, so that the upper and lower edges remain as protrusions. And a track groove is formed on each of the erase core blocks. The track grooves are formed to form grooves 8 and 10 through the upper protruding portion on the center core block side, and the read / write core block 4 and the erase core are formed. Each track width of the block 6 is aligned with the respective center core blocks facing each other, and the non-magnetic material 18 is poured into the recess from the groove 16 obtained by the track groove processing. It is characterized in that the write core block 4 and the erase core block 6 are joined.

[Action]

In the method of manufacturing a magnetic head according to the present invention, since the non-magnetic material 18 as an adhesive is poured into the concave portion 16 formed in the read / write core block 4 or the erase core block 6, the gap interval D is set to the read / write core block 4.
It is given by the sum (D = a + b) of the thickness a of the center core block 12 on the side and the thickness b of the center core block 14 on the erase core block 6 side. According to such a method, the joining operation between the cores is facilitated, and the setting accuracy of the gap interval D is enhanced with high fixing strength.

The recess 16 is formed in the center core block 14 on the erase core block 6 side as shown in FIG. 1B, and as shown by a two-dot chain line in FIG. , May be formed on both the center core blocks 12 and 14.

〔Example〕

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

FIG. 2 shows a specific embodiment of the method of manufacturing a magnetic head according to the present invention.

As shown in FIG. 2A, a plate-shaped center core block 12 is inserted into a read / write core block 4 made of magnetic ferrite so as to cover a concave portion 20 provided for forming a wiring window. Bonding is performed by fixing means such as glass bonding. In the case of this embodiment, a concave portion 16 for pouring a non-magnetic material as an adhesive is formed on the surface of the center core block 12.

Next, as shown in FIG. 2 (B), like the read / write core block 4, the erase core block 6 made of magnetic ferrite has a plate-like shape so as to cover the recess 22 for the wiring window. The center core block 14 is joined by fixing means such as glass bonding. In the case of this embodiment, the center core block 14 of the erase core block 6
Has a flat surface.

Next, as shown in (C) of FIG. 2, (A) of FIG.
2 and FIG. 2 (B), the read / write side core 24 and the erase side core 26 in which the gap 2 is formed by joining with the center core blocks 12 and 14 in the step shown in FIG. As shown in D), track grooves are formed to form a plurality of grooves 28 in the read / write side core 24 and a plurality of grooves 30 in the erase side core 26.

Next, as shown in FIG. 2E, each read / write side core 24 and erase side core 26 are connected to the center core block 1.
At the same time, the non-magnetic member 32 such as glass as an adhesive is placed on the groove portions 28 and 30 side and melted, and the center core blocks 12 and 14 are removed from the groove portions 28 and 30.
Into the recess 16 between the two. At this time, the respective track widths of the read / write side core 24 and the erase side core 26 are aligned to embed the non-magnetic material 32 in the grooves 28 and 30, and the core block 34 shown in FIG. obtain.

Next, with respect to the core block 34, FIG.
As shown in FIG. 5, gap depth processing is performed, and in this case, the rear end surface portion 36 of the core block 34 (the surface opposite to the surface 38 facing the magnetic recording medium) is cut off.

Next, the core block 34 is cut out at a constant width with the track width T at the center, and a core chip 40 as shown in FIG. 2H is obtained. The wire is wound to complete the magnetic head.

Therefore, in such a method of manufacturing a magnetic head,
For coupling between the read / write core 24 and the erase core 26,
Since there is no spacer as in the prior art, there are only two components that determine the accuracy of the gap distance D, the read / write core 24 and the erase side core 26, and the dimensional error is low and the accuracy of the gap distance D is high. . In addition, since there is no spacer installation work and the non-magnetic material 32 is poured,
The read / write side core 24 and the erase side core 26 are connected, and the gap interval D is regulated by the thickness of the center core blocks 12 and 14 regardless of the connection.

Then, the read / write side core 24 and the erase side core 26 are firmly joined by the non-magnetic material 32 poured into the concave portion 16, and the joining strength between them is increased.

〔The invention's effect〕

As described above, according to the present invention, the accuracy of the gap interval can be increased, the strength of the fixed portion can be increased, and there is no need to install a spacer. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a method of manufacturing a magnetic head of the present invention, and FIG. 2 is a diagram showing an embodiment of a method of manufacturing a magnetic head of the present invention. 2 ... gap, 4 ... read / write core block, 6
… Erase core block, 8, 10 …… Groove, 12, 14…
... Center core block, 16 ... Recess, 32 ... Non-magnetic material.

Claims (1)

(57) [Claims] A recess formed in the center core block of the read / write core block or the erase core block having a gap so that upper and lower edges remain as projections;
A track groove is formed on each of the read / write core block and the erase core block, and a groove is formed through the upper protruding portion on the center core block side by the track groove processing, and the read / write core block and the erase are formed. The alignment of the track widths of the core blocks is performed by joining the respective center core blocks so that the center core blocks face each other. A method for manufacturing a magnetic head, comprising joining a block and an erase core block.