JPS6019044B2 - Method for manufacturing multi-element magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a multi-element magnetic head mounted on a magnetic drum device and a magnetic disk device used as an external storage device of a computer.

These heads generally perform recording and playback by floating with a certain gap between them and a medium such as a drum or disk, but in recent years, as the performance of devices has improved, the flying gap has become much narrower than before (for example, 0 It became necessary to levitate the ship at a speed of .5mm).

child. Therefore, as shown in Fig. 1, there is a head, called a monolithic type head, which is stable against changes over time and temperature, in which the cores 1 and 2 and the slider 3i for floating are formed from the same magnetic block 4. It's becoming mainstream. However, this type of head is core 1,
For example, core 1
In other words, the magnetic flux 5 leaking from the core 2 is reproduced by the winding 6 of the core 1, and in the core 1, a noise component called crosstalk occurs in addition to the desired signal, which significantly reduces the reliability of information. In reality, by widening the distance between cores 1 and 2, crosstalk is reduced to some extent, thereby maintaining information reliability to a certain extent. However, if you try to increase the density of tracks written on the media in order to improve the performance of the device, the distance between cores 1 and 2 will inevitably become narrower, increasing crosstalk, which will hinder the improvement of the device's performance. It's coming.

For this reason, as shown in FIG. 2, shield plates 7 and 8 made of steel or the like having high electrical conductivity are inserted between the cores 1 and 2 to provide a shielding effect and reduce crosstalk. However, with this method of inserting the shield plates 7 and 8, the cost of forming the shield plates to be inserted is expensive, the insertion work is difficult, and furthermore, it is complicated because adhesive etc. are required to fix the inserted shield plates. There were many difficulties in practical implementation. The purpose of the present invention is to solve the problems of the conventional method described above, and to provide a method for manufacturing a multi-element magnetic head that can easily produce a multi-element magnetic head capable of high-density recording. .

The present invention is characterized in that a first groove is formed on the surface of a first magnetic block, and the surface of the first magnetic block is bonded to the surface of a second magnetic block using a non-magnetic adhesive. A second groove is carved in a surface perpendicular to the bonding surface of the bonded body and perpendicular to the first groove, and the second groove is filled with a substance having high electrical conductivity. A third groove is carved in the high electrical conductivity village portion and the magnetic material portion from the first block side of the bonded body to form a core, and a third groove is carved in the surface of the bonded body facing the recording medium. 4 grooves are carved to determine the thighs of the core, and the legs of the core carved out by the first grooves and the second grooves are wound.

Refer to FIGS. 3 to 7 below for an embodiment of the present invention. This will be explained in detail. First, as shown in FIG.
To make this, magnetic blocks 9 and 10 are joined with glass or the like 13.

After that, grooves 11 and 12 are formed. After forming the grooves, the grooves are filled with a material having high electrical conductivity to form shield parts 14 and 15, as shown in FIG. The material used for this purpose may be, for example, one made by pouring and hardening a conductive resin, or one made by filling silver powder or the like and binding it together. The thus obtained block 4 is subjected to core separation processing to form a gap 16 as shown in FIG. Finally, processing is carried out to obtain the finally necessary track center 17 and slider 3 as shown in FIG. 6, and the core portion of the head as an example of the present invention is completed. FIG. 7 is a cross-sectional view taken along line A-A' in FIG. 6. By winding the core 2 having such a configuration, a head with reduced crosstalk to the core 1 can be obtained. The same applies to core 1. From the above, it is expected that the adoption of the present invention will have a great effect in producing a high-performance memory copy by obtaining a head with low crosstalk and increasing track density.
In the description of the present invention, only the case where there are two cores is described, but the present invention can of course be applied to cases where there are three or more cores.

[Brief explanation of drawings]

Fig. 1 is a perspective view illustrating a subordinate head, Fig. 2 is a perspective view illustrating a conventional head with a shield material inserted, and Fig. 3 is a perspective view illustrating a conventional head with a shield material inserted.
4, 5, and 6 are perspective views for explaining the manufacturing order of the core of the head according to the present invention, and FIG. 7 is a sectional view taken along the line AA' in FIG. 6. 1, 2... Core, 3... Slider, 4... Magnetic block, 9, 10... Block, 11, 12... Groove, 14,
15... Shield portion, 16... Gap. O Prisoner O 28 O 39 Years Old 48 Years Old 5 Years Old 5 Years Old Prisoner Na T Mother

Claims (1)

[Claims] 1 Forming a first groove on the surface of the first magnetic block,
The surface of the first magnetic block is bonded to the surface of the second magnetic block using a non-magnetic adhesive, and a surface of the bonded body is perpendicular to the bonding surface and perpendicular to the first groove. carving a second groove, filling the second groove with a substance having high electrical conductivity;
A third groove is carved in the high electrical conductivity material part and the magnetic material part from the first block side of the joined body to form a core, and a fourth groove is carved on the surface of the joined body facing the recording medium. Manufacturing a multi-element magnetic head characterized in that the width of the core is determined by cutting grooves, and winding is applied to the legs of the core carved by the first groove and the second groove. Method.