JPS60145505A - Magnetic head and its production - Google Patents

Abstract

PURPOSE:To attain a narrower track in a head core and to present its production method by providing a magnetic layer having prescribed thickness on nonmagnetic base frames which are butted through a gap material and have a window for winding. CONSTITUTION:Two nonmagnetic materials 10A and 14A are butted through a gap material 15 into one body, and they are etched to form two recessed parts 21 and 22 while leaving the part of the gap material 15 as it is, and a magnetic layer 31 is formed in these two recessed parts 21 and 22. The front end face of a nonmagnetic base frame 30 formed in this manner is polished to expose the gap material 15 to the front end face which should be a track face, and a heat core 40 having a gap G on the front end face is obtained, and the magnetic layer 31 is so polished that a prescribed track width is attained, and a protective nonmagnetic layer 41 is provided as required, and a winding 42 is provided in a window 23 for winding, thus completing a magnetic head having a narrow track.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a magnetic head suitable for small-sized v'r't< pins with narrow track widths, picture nodules, computer (commercial magnetic disk heads, etc.), and a method for manufacturing the same. Regarding.

(Description of the Prior Art) In recent years, high-density recording 52 on recording media has become popular, and the magnetic head used therefor is required to have a narrow trunk.

However, as shown in FIG. 1, in the conventional method, the head core 4 is made by cutting the magnetic phase blocks 1゜2 abutted and integrated with the gap material 3 in between, as shown by the solid line, so as to have a predetermined track width. ) In the J11 work, as the track width is narrowed, the mechanical strength of the magnetic wire 4 becomes weaker, making it difficult to cut it from the block.

(Objective of the Invention) The present invention aims to solve the problems of the prior art described in 1.
The present invention aims to provide a magnetic nod and a method for manufacturing the same, which achieves a narrow I/rack, which was previously impossible, by applying special film technology.

(Example of the invention) Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 2, first, a non-magnetic material block 10 is made which is a non-magnetic layer and has a U-shaped cross section (C-shape) whose surface can be etched by some method. In this non-magnetic material block 10, the abutting surfaces 11, 12 are mirror-finished so that they are flush with each other. Here, the abutting surface 11 corresponds to the front gap portion of the head core, and the abutting surface 12 corresponds to the pack-gamble portion of the head core, respectively. The groove 13 corresponds to a winding window.

The non-magnetic material 70 and the ink 10 have the required dimensional accuracy in advance.

On the other hand, as shown in FIG. 3, a plate-shaped non-magnetic material block 14 whose surface can be etched is prepared separately from the non-magnetic material block 10 having a F-shaped cross section, and the abutting surfaces thereof are mirror-finished. Process it and set it aside. and one or both non-magnetic phases 70ink1().

14 and 11, a gap material 15 made of a non-magnetic material that remains unetched when etching the non-magnetic material block is sputtered, vapor-deposited, or deposited to a predetermined thickness t corresponding to the gap length. By means equivalent to
Insert between A blocks 10 and 14. Alternatively, metal foil or the like may be inserted as the gap material 15. Furthermore, if necessary, a low melting point substance such as solder is applied to the abutting surfaces of the gap material 15 and the non-magnetic material blocks 10.14 by sputtering or the like, so that both valve magnetic material blocks 10.14 can be applied in a later process. Convenient for thermocompression bonding.

Then, as shown in FIG. 4, both valve magnetic material blocks 10
．． 14 are pressed against each other with a gap material 15 interposed therebetween, and are bonded by thermocompression, or if necessary, are integrated by using an adhesive resin 16 from the outside.

After that, the unified professional plate 7 in Fig. 4 was cut to an appropriate thickness as shown in the ptSs drawing, and the non-magnetic material 10A,
A block piece 20 having a gap material 15 of 1.4A is created. The thickness of this professional 22 piece 20 is required to be at least larger than the necessary track width of the head.

Next, the non-magnetic materials 10 and 14 of block piece 2 () are
Etch the parts (erase, form recesses 21° and 22 in both valve magnetic materials 10A and 1.↓A, respectively, as shown in Figs. 6 and 7. Here, the four parts 21 and 22 will be formed with the head core in a later process. Therefore, the fourth part 21 is a part where a magnetic layer is provided.
．． The depth of 22 is sufficient to form the track width of a given helix. It is set to be 8. In addition, both valve magnetic materials 108.

14 Alill two pieces of gigantic material 15
remains unetched. As a result, the non-magnetic underframe 3 which is butted together with the gear and the plate 15 interposed therebetween and has the winding window 23
0 will be configured.

As shown in FIG. 8, a magnetic layer 31 is formed on the non-magnetic underframe 30 of FIGS. 6 and FF17 by sputtering, vapor deposition, coating, or equivalent means to a thickness greater than the required track width. Here, as the material of the magnetic layer, ferrite, sendust, permalloy, or an amorphous magnetic alloy can be used.

Thereafter, as shown in FIG. 9, unnecessary portions of the magnetic layer 31 formed on the non-magnetic underframe 30 are removed by polishing 1v:, and the front end surface of the non-magnetic underframe 30 is also polished and removed. , the gap material 15 is exposed on the front end surface which becomes the track surface. As a result of (2), the hendofer 40 having the gap G on the front end surface is constituted by the magnetic material )'f431.

Then, the magnetic layer 31 is polished to a predetermined trunk width, and the protective non-magnetic layer 41 is deposited by vA as shown in 10th 1. Then, the necessary gear/depth) processing,
After processing the external shape, embedding the slider in the case, and winding the winding wire 42 in the winding window 23, the narrow track magnetic field is completed.

(Effects of the Invention) As explained above, according to the present invention, the following effects can be achieved.

(1) To construct the 7-dore core with a magnetic layer by sputtering, steaming, coating, or equivalent means,
There is no limit to the thickness of the trunk, and you can set it to any size you want.

(2) Since the magnetic layer is provided on the non-magnetic frame, sufficient mechanical strength can be ensured.

(3) As a result, it is possible to easily construct a recording head for a small size v'rr< with a narrow trunk or a piece for a composite head.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional method of manufacturing a magnetic helix, FIGS. 2 to 6 are perspective views explaining the present invention in detail, and FIG.
The figure is a Vll-Vll sectional view of FIG. 6, FIG. 8 is a sectional view after a magnetic layer is provided, and FIGS. 9 and 10 are perspective views for explaining the embodiment. . 10.14...Non-magnetic material block, IOA, +4A・
...Nonmagnetic material, 15...Gap material, 21.22...
・Concavity, 23... Winding window, 30... Non-magnetic underframe,
31... Magnetic layer, 40... Head core. Takashi Murai, patent attorney and agent for patent applicant T.D.K. Co., Ltd.

Claims (2)

[Claims] (1) A non-magnetic underframe with a winding window and a magnetic layer of a predetermined thickness provided on the underframe are butted together via a gear wheel, and a gap is formed by the magnetic JI7i. A magnetic spatula characterized by comprising a head core having
'. (2) After combining the two non-magnetic materials through the camping material, leaving the gap shrine part n1j,
A head core having a camp was constructed by etching two non-magnetic material parts to create a non-magnetic underframe having two four parts and a winding window, and forming a magnetic layer on the two four parts. 9. A method for manufacturing a magnetic spatula 1ζ゛ having a +1- characteristic.