JPS63259807A - Production of magnetic head - Google Patents

Abstract

PURPOSE:To remove the working strains in a track width direction by forming grooves for obtaining the track width to a magnetic material block at the spacings wider than the prescribed track width, then etching the block by a prescribed liquid. CONSTITUTION:An inside winding groove 10 and an outside winding groove 11 are worked to the block 9 consisting of the oxide magnetic material or alloy magnetic material. The track grooves 12 are formed at the spacings 13 wider by about 6mum than the prescribed track width. This block 9 is then etched about 3mum by using and HCl or H3PO3 soln. to finish the track width 13 to the prescribed track width 14. Glass 15 is thereafter molded and the opposite surfaces of a gap are polished to a specular surface. SiO2 or the like to serve as a gap material is formed about 0.15mum therein by a method such as sputtering. The resulted two blocks are glass-welded and thereafter block is cut 16 at the curvature given to the tape sliding surface, by which the magnetic head chip is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a magnetic head necessary for performing high-density magnetic recording and reproducing with a shortest recording wavelength of 1 μm or less.

[Summary of the Invention] The method for manufacturing a magnetic head of the present invention includes forming track grooves with a predetermined track width in a block of an oxide magnetic material having high magnetic permeability or an alloy magnetic material having high magnetic permeability and high saturation magnetic flux density. It is characterized in that the tracks are formed at wide intervals and then etched using HCI, H3PO4, etc. to obtain a predetermined track width.

[Conventional technology]

A conventional method of manufacturing a magnetic head will be explained with reference to Figures 7 and 11.

First, an internal winding groove 2 and an external winding groove 3 are formed on a block 1 made of an oxide magnetic material or an alloy magnetic material by cutting using a dicing saw or the like. Subsequently, the track grooves 4'f are machined by cutting at intervals of the track width 5. Next, the internal winding groove 2 and the track groove 4 are filled with glass 6, and then the glass in the portion 7 is cut, and the surface facing the gap is polished to a mirror finish. After that, a gap material such as 5i02 is formed with a thickness of about 0.15 μm by sputtering etc., and 2
The gap-opposing surfaces of the two blocks are brought together and the glass portions are welded together, and then cut at point 8 at t7I to obtain a magnetic held tip as shown in FIG. 11.

[Problem that the invention seeks to solve]

In the above-mentioned conventional magnetic head manufacturing method, when processing track grooves, etc., the magnetic material is cut with a dicing saw, etc., and a large processing strain occurs in the area 2 to 3 μm from the processing surface. Magnetic properties will deteriorate significantly. Particularly, in the part forming the track width (hereinafter referred to as track part), the part where processing strain has occurred does not work effectively, so the effective track width becomes narrower than the predetermined track width. There is a problem in that as the effective track width decreases, the reproduction output also decreases.

[Means for Solving the Problems] The method for manufacturing a magnetic head of the present invention involves forming track grooves in a block of oxide magnetic material having high magnetic permeability or alloy magnetic material having high magnetic permeability and high saturation magnetic flux density. It is characterized in that it is formed at intervals wider than a predetermined track width, and then etched with HCI, H3PO4, etc. to obtain a predetermined track width.

[Function] According to the present invention, since the entire width of the portion forming the track width effectively acts during recording and reproduction, a high-output magnetic head can be obtained. Particularly, in the case of a magnetic head with a narrow track width, the effects of the present invention are noticeable.

〔Example〕

Embodiments of the present invention will be described using FIGS. 1 to 6.

First, an internal winding groove 1o and an external winding groove are formed in the block 9 made of oxide magnetic material or alloy magnetic material. Next, as shown in FIG. 2, track grooves 12 are formed at intervals 13 about 6 μm wider than the predetermined track width. Next, the block processed in this way, HCI or H3P O4
By etching using gft and 'jf',
Etching is performed by about 3 μm to change the track width from 13 to a predetermined track width 14 as shown in FIG.

Thereafter, glass 15 is molded, the surface facing the gear is polished to a mirror finish, and a gap material such as SiO2 is formed on that part to a thickness of about 0.15 μm by sputtering or the like. The two blocks obtained in this manner are joined together with their gear facing surfaces and glass welded to obtain a block as shown in Figure 5. Thereafter, a curvature is applied to the sliding surface of the tape and the tape is cut from 16 parts to obtain a magnetic radial tip as shown in Fig. 6.

〔Effect of the invention〕

According to the present invention, processing distortion in the track width direction can be removed, and a high-output magnetic head can be obtained.

[Brief explanation of drawings]

1 to 6 are diagrams showing an embodiment of the method for manufacturing a magnetic head of the present invention. 7 to 11 are diagrams showing an example of a conventional method for manufacturing a magnetic head. Oxide magnetic material or alloy magnetic material 2: Internal winding groove 3: External winding groove 4 Ni track groove 5: Predetermined track width 6: Glass 7: Internal winding groove 8:
Cutting line 9 Dioxide magnetic material or alloy magnetic material 10: Internal winding groove 11: External winding groove 12 Nidrach groove 13: Width of 6 μm in predetermined track width direction 1
4: Predetermined track width 15 Nigarasu 16: Cutting line agent Patent attorney Takeshi Sugiyama (and 1 other person) 1N Kaisho 63-259807 (3) 14 q 21st!1 n rl
Death OM No. V Kyou Complete OP Figure 9

Claims (1)

[Claims] 1. In a method for manufacturing a magnetic head using an oxide magnetic material having high magnetic permeability or an alloy magnetic material having high magnetic permeability and high saturation magnetic flux density as a core material, grooves for obtaining a track width are formed in the magnetic material block in a predetermined manner. HCI or H_3
A method for manufacturing a magnetic head, characterized in that a predetermined track width is obtained by etching with PO_4 or the like.