JPS6356807A - Manufacture of magnetic head - Google Patents

Abstract

PURPOSE:To facilitate the processing and to improve the accuracy of dimension by suppressing the dispersion in the depth of gap of a core for read/write and a core for erasure in processing a slot. CONSTITUTION:A slot 24 having a relative size and a specific angle to a top 40 of a recessed part 24 is formed to the read/write core 20 obtained by forming a center core block 26 to a read/write core block 22. Moreover, a slot 50 bridged over a gap 38 and having an end on the surface of the erasure core block 32 is formed to an erasure core 30 obtained by bonding a center core block 36 to an erasure core block 32 in matching with the track width T. Then the read/write core 20 and the erasure core 30 are bonded to form the core block. As a result, the track width T and the gap depth GD are controlled by a high part 44 between the slots 42 in the read/write core 20 to obtain the desired track width T and the depth GD.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method of manufacturing a magnetic head such as a bulk type magnetic head that performs magnetic recording and reproduction on a magnetic recording medium such as a floppy disk device (FDD). , especially track width and gear width.
This invention relates to easier control and higher precision of control (pth).

[Conventional technology]

As shown in FIG. 3, the cores constituting a bulk type magnetic head corresponding to a conventional FDD, for example, include a read/write core (R/W core) 2 and an erase core (Er core) 4. The center core 6 and the center core 8 provided on the Er core 4 side of No. 2 are joined with a non-magnetic material 10 interposed therebetween.・R/W core 2 and Er core 4 (
On the surface facing the FDD as an n-air recording medium, a concave portion is formed and a non-magnetic material 12 is embedded, and the trunk width T is selectively adjusted.
is set.

This core manufacturing method is to form a core block by joining a R/W core block and an Er core block, each made of magnetic ferrite, with a center core block interposed, and then from the core block. A core chip is cut out to a certain thickness, processed to form a core, and a slider 14, 16 is fixed to the core as shown in FIG.

[Problem that the invention seeks to solve]

By the way, in conventional magnetic head manufacturing methods, the gap dibs CD in the core is controlled by two methods: (1) a method based on the mechanical dimensions from the rear end surface of the core to the apex (avex portion) 18; Slider 14
．． There are three methods, one based on the height dimension of No. 16, but all methods have the disadvantage of low dimensional accuracy because it is difficult to control the gear and gear depth during machining.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method for manufacturing a magnetic throat, which facilitates machining of the gear depth and improves dimensional accuracy.

[Means for Solving the Problems] As shown in the first part, the magnetic head mounting method of the present invention includes gears, brakes, etc. for the read/write core block 22.
8 and joining the center core block 26 to the read/write side core 20, forming a groove 42 across the gear knob 28, and joining the center core block 36 with a gap 38 provided to the erase core block 32. Processing a groove 50 that spans the gap 38 and has an end on the surface of the erase core block 32 in the erase side core 30, and joins the read/write side core 20 and the erase side core 30 to form a core block 56. By forming the track width T and cutting the surface of the core block 56, the track width T
After processing it to a specific size, cut it out and make the core chip 5.
8.

[For production]

The method for manufacturing a magnetic hend according to the present invention includes a read/write side core 2 obtained by joining a read/write core block 26 with a gap 28 to the read/write core block 22.
0, a groove 42 having a relative dimension and a specific angle with respect to the top 40 of the recess 24 is formed, and a gap 38 is provided with respect to the erase core block 32, and the center core block 36 is joined to the erase side. To core 30,
Power across Gamb 38) Erase core block 32
After forming a groove portion 50 having a terminal end on the surface of the groove portion 50 according to the groove width T, the read/write side core 20 and the erase side core 30 are joined to form a core block 56. As a result, in the read/write side core 20, the track width T and the gear width CD are increased by the peaks 44 between the grooves 42.
is controlled, and the desired track width T and gear width CD are obtained.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a method of manufacturing a magnetic head according to the invention.

As shown in FIG. 1(A), the read/write side core 20
A recess 24 having a trapezoidal cross section is formed in a read/write core block 22 made of magnetic ferrite, and a center core block 26 is joined to the read/write block 22 with a gap 28 in between so as to close the recess 24. It is something. Also, like the read/write side core 20, the erase side core 30 has a recess 34 having a trapezoidal cross section formed in the erase core block 32 made of magnetic ferrite, so that the recess 34 is cooled relative to the erase core block 32. center core block 36 to gap 3
8 is interposed. Block 22.2
6 and the blocks 32 and 36 are bonded using a non-resistance material such as glass, so-called glass bonding, and the gaps 28 and 38 are secured by a non-magnetic material.

The read/write side core 20 is machined with a trunk groove in which a plurality of V-shaped grooves 42 are formed at specific intervals in a direction perpendicular to the gap 28 and have a specific angle and a relative dimension to the top 40 of the gear knob 28. I do.

In this case, in the read/write side core 20, as shown in FIG.
With respect to D, the track width T is set by the width of the intermediate portion of the peak portion 44 formed by two adjacent groove portions 42. A hatched portion 46 indicates a cut portion, and 48 indicates a fixed portion made of a non-magnetic material that forms the gap 28.

In addition, the erase side core 30 also includes the read/write side core 2.
0, in the direction perpendicular to the gear 38, ° gap 3
Track groove processing is performed by forming a plurality of groove portions 50 extending over 8 and having a terminal end on the surface of the erase core block 32.

Next, the read/write side core 20 and the erase side core 30 are inserted into the center core block 2 as shown in FIG.
A core block 56 is formed by interposing a non-magnetic material 52 on the 6.36 side and embedding a non-magnetic material 54 in each groove 42.50. In this case, the non-magnetic material 52.5
For example, glass is used for 4. The core block 56 is subjected to gear sop dibs processing by surface cutting, and the track width T and gap dibs CD in the read/write core block 22 are adjusted to specific sizes.

Next, this core block 56 is cut out with a constant width so that the track width T is in the center.
A core chip 58 is obtained as shown in C).

Next, as shown in FIG. 1(D), sliders 60 and 62 are attached to the core chip 58, and the core
Completed as 4.

The winding window 6 formed in the recess 24 in this core 64
A read/write coil is wound around 6, and an erase coil is wound around the winding window 68 formed by the recess 34 to complete the magnetic head.

〔Effect of the invention〕

As explained above, according to the present invention, the following effects can be obtained.

Since it is possible to suppress variations in the gear depth of the read/write side core and the erase side core during machining of the fat groove, the accuracy of the gap depth can be increased and the dimensional accuracy of the gap depth between products can be stabilized.

(b) By managing the track width on the read/write side core side, the gap depth can be accurately and easily managed, and the gap depth can be easily processed.

[Brief explanation of drawings]

FIG. 1 is a diagram showing steps in an embodiment of the magnetic head/node manufacturing method of the present invention, FIG. 2 is a diagram showing track width setting in the magnetic head manufacturing method shown in FIG. 1, and FIG.
The figure is a perspective view showing the core of a conventional magnetic head.
The figure is a perspective view showing a slider assembly in a conventional magnetic head. 20... Read/write side core, 22... Read/write core block, 26.36... Center core block, 28.38... Gap, 30... Erase side core, 32... Erase core Block, 52.54...
- Non-magnetic material, 56... Core block, 58... Core chip, 60.62... Slider, 64... Core. (B) Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A step of machining a groove across the gap in a read/write side core to which a center core block is joined with a gap provided to the read/write core block; A process of forming a groove on the erase side core that spans the gap and has a terminal end on the surface of the erase core block, and joining the read/write side core and the erase side core to form a core. A method for manufacturing a magnetic head, comprising the steps of forming a block, and cutting the surface of the core block to have a track width of a specific size, and then cutting the core block to form a core chip.