JPS60171608A - Method for manufacturing magnetic head of oxide magnetic substance - Google Patents

Abstract

PURPOSE:To prevent occurrence of chipping off of the edge section of a magnetic head so as to manufacture a highly reliable magnetic head, by forming a core block, from which the core of the magnetic head is manufactured by slicing, in such a way that after a pair of magnetic substance bodies are butt welded to each other track width controlling grooves are installed to the united body and glass is molded to the grooves. CONSTITUTION:A groove 21C is installed to one 21 of a pair of oxide magnetic substance bodies 21 and 22. Then gap spacers are formed on the gap forming surface of the magnetic bodies 21 and 22 by sputtering method, etc., and the magnetic bodies 21 and 22 are welded to each other with their gap forming surfaces by heating the spacers. Plural track width controlling grooves are then installed to the united magnetic substance body 25 and glass 26 is molded to the grooves. Thus, a core block 27 is formed. The core block 27 is sliced to manufacture cores. Since the track width controlling grooves are worked after the gap forming surfaces are finished, discrepancy in the track and chipping off of the edge section can be prevented. as a result, a highly accurate and highly reliable magnetic head can be manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a highly accurate and reliable oxide magnetic head can be manufactured. The present invention relates to a method of manufacturing an oxide magnetic head.

2. Description of the Related Art Conventionally, there is a method shown in FIG. 1 for manufacturing a magnetic head made of an oxide magnetic material. That is, a plurality of track width regulating grooves 1A are provided in the oxide magnetic material 1 at regular intervals, and a plurality of track width regulating grooves 1A are provided at regular intervals.
A winding groove 10 perpendicular to the oxide magnetic body 2 is provided, a plurality of track width regulating grooves 2A are provided at regular intervals in the oxide magnetic body 2, and the gap forming surfaces 113.2 of the oxide magnetic bodies 1 and 2 are finished with a Bi lamp or the like. Or, conversely, the gap forming surface IB, 213 of the oxide magnetic body 1.2 is finished first, and then the trunk width regulating groove 1A and the winding groove i are formed on the oxide magnetic body 1.
cy, (at the same time as providing the trunk width regulating groove 2Af in the oxide magnetic material 2, after that, gap spacers (not shown) are completely formed on the gap forming surface 113 or 2134 or 1B and 2B, and Butt oxide magnetic materials 1 and 2 together.

Place the glass 3 in the track width regulating grooves IA and 2A.
The oxide magnetic materials 1 and 2 are glued together, and the core block 4 is
At the same time, a gap 5 is formed using a gap spacer.
'ff: Formed, oxide magnetic bodies 1 and 2 of core block 4
Then, the entire core 6 is formed by slicing the entire glass 3 parallel to the short side direction of the core block 4, and the entire tape sliding surface 6A of the core 6 is polished.
It is equipped with.

In this prior art, l-rack width regulating groove IA
, 2A, the gap forming surface I B ,
2 If the process of finishing B is followed, gap forming surface 1
13, 213 lap finish is sometimes used.

As shown in FIG. 2, there are many chips and misalignments on the edge portion of the gap forming surface 11 (2D), and when the fLs are butted together, there is a drawback that it becomes difficult to regulate the track width TW as shown in FIG. .I cut it.

If the track width is narrow (approximately 20 μm), there is a risk of not only chipping or sagging, but also damage to the entire trunk depending on handling force, and there is a drawback that it is not suitable for mass production. On the other hand, after finishing the gap forming surface 1r3.28, grooves for track width regulation IA and 2A are processed? If this step is followed, the gap forming surfaces IB, 2+ will be formed as shown in FIG.
Chipping 9 occurs at the edge portion of 3, and when these and fl are butted together, it is difficult to regulate the track width TW, and the effect is particularly severe in narrow track widths.

There are nine ways to eliminate the above drawbacks. That is, after the track width regulating grooves IA and 2Ak were formed on the oxide magnetic material 1.2.

The glass 3 is completely molded in the track width regulating grooves 1A' and -2A, the winding groove ICi is provided in the oxide magnetic material 1, the gap forming surface 113.2B is completely finished, and the core block 4 is completely molded.
Except for the process of forming.

This is the same manufacturing method as described above. In this manufacturing method, the core block 4 is formed by softening the glass 6 that has already been molded into the track width regulating grooves IA and 2A.

In the manufacturing method described later, the glass 6 also serves to protect all the edge portions of the gap forming surfaces I B and 2 H, so the drawbacks of the manufacturing method described above are eliminated.

However, in both the above and below manufacturing methods,
Both are track width regulating grooves IA.

After providing 28, the gap forming surface I B , 21.3
Because we are trying to match the tracks and match them.

A deviation of track width '1'W as shown in FIG. 5 is likely to occur. Ushida, gap formation surface 113 by snow ξ ivy method,
21. (When the gap spacer is fully formed.

In the manufacturing method described above, as shown in FIG. 6(a), the track width regulating grooves IA and 2AK- are also 1. In the manufacturing method described later,
As shown in FIG. 6(b), gap spacers 10 are also formed on the surface of the glass.

In particular, in the case of the manufacturing method described below, the gap ribbon 10 in which the oxide magnetic material 1.2 is bonded by softening the glass 3 is as follows:
It becomes a shape sandwiched by glass 3, and is absorbed into glass 3 as glass 3 softens, but at this time glass 6
As a result, bubbles 11 are likely to be generated along the gap spacer 10 as shown in FIG. This is particularly noticeable when the gap spacer 10 is formed thick (approximately 0.6 μm).

If the air bubbles 11 remain in the depth end portion 12, when the full depth of the gap 5 is regulated, highly accurate machining cannot be performed because the length is measured through the entire air bubbles 11.

And work efficiency is poor. Further, if exposed to the tape sliding surface 6A, there is a risk that magnetic powder may become embedded and cause dust to adhere, and furthermore, there is a risk of damage to the magnetic tape and loss of spacing between the tape and the tape due to uneven wear.

The present invention solves these drawbacks of the prior art! The method for manufacturing an oxide magnetic head of the present invention is to slice a core block parallel to the short side direction thereof, polish the entire tip of the core, and polish the entire tip of the core. In a method of manufacturing an oxide magnetic magnetic head in which all the windings are installed using winding holes, a winding groove is formed on the gap forming surface of one of the pair of oxide magnetic materials. In general, a pair of oxide magnetic bodies are butted against each other via a gap spacer, and the pair of oxide magnetic bodies and the gap spacer are heated.

A pair of oxide magnetic materials are adhered, and then a plurality of track width regulating grooves are provided at regular intervals in parallel to the short side direction of the integrated oxide magnetic material, and glass is placed in the trunk width regulating grooves. The entire core block is formed by molding.

The present invention will be explained below based on the drawings.

FIG. 8 is a diagram showing an embodiment of the present invention.

On the gap forming surface 21A of one of the oxide magnetic bodies 21 of the pair of oxide magnetic bodies 21' and 22.

A winding groove 21c is provided parallel to the longitudinal direction. In addition, if necessary, a winding groove 2 is provided on the gap forming surface 2.1A.
Rear glass reinforcing grooves 211) may be provided parallel to 10 and spaced apart at regular intervals. The tip of the winding groove 21C corresponds to a depth end portion, and the length from the track portion 2113 to the tip end of the winding groove 2IC is determined in consideration of the required value of the Zoronto gap depth.

Next, the gap forming surface 21A of the oxide magnetic material 21.22
, 22Ak wrap, etc. to make it distortion-free.

Snow on the gap forming surfaces 21A and 22A? Gap spacers (not shown) are completely formed using the ivy method or the like. The gap length of the gap 23 is determined by the thickness of the gap spacer. Note that the gap forming surfaces 21A, 22A
Only on one side of the skin.

A gap spacer of constant thickness may be formed.

Next, oxide magnetic bodies 21, 22 . Namely.

The gap forming surfaces 21Δ and 22A are all abutted, the oxide magnetic material 21.22 and the gap spacer are fully heated, and the oxide magnetic material 21.22ffi is bonded. This heating temperature is lower than the softening point of the gear lapse material. When the rear glass reinforcing groove 21D'i is provided, the glass 24 is inserted and welded into the rear glass reinforcing groove 2iD.

Next, the upper surface of the integrated oxide magnetic body 25.

That is, the track portion 211 of the oxide magnetic material 21.22
3, 22B, track width regulating grooves 25A (multiple grooves are provided at regular intervals H. Depth of track width regulating grooves 25A (■)) parallel to the short side direction thereof are two times deeper than the depth end portion, and l - It is larger than the length L from the rack part 2113 to the tip of the winding groove 21C. Also, the track section 21B.

The track width TW of 22B is the track width regulating groove 25.
It is determined by the width W of A and the interval P.

Next, a core block 27 is formed by molding glass 26 in the track width regulating groove 25A.

Next, the core 28 is formed by slicing the entire glass 26 surface of the core block 27 in a direction parallel to the hearth direction of the core block 27 (as shown by a dashed line C).

Next, the tip of the core 28, that is, the l-rack portion 21
13.2213 and 26 glass surfaces and all polished.

Tape sliding surface 28 Af shadow is formed.

Next, the core 28 is provided with a winding hole, that is, a winding groove 21c'.
The magnetic head is completed by attaching the winding 29 using the magnetic head.

In this invention, the gap forming surfaces 21A and 22 of the oxide magnetic bodies 21 and 22 are finished with Ar.

A track width regulating groove 2 is formed in the integrated oxide magnetic material 25.
Since it is processed at 5A, there is no need for track alignment of a pair of oxide magnetic materials. Therefore, track deviation and gap forming surfaces 21A, 22. A chip on the edge part,
Chipping can be prevented from occurring. Therefore, a highly accurate magnetic head can be manufactured.

Further, when molding the glass 26 in the track width regulating groove 25A, the gap spacer is not erected in the track width regulating groove 25A, which is different from the conventional technique. The molded glass 26 does not hold the gap spacer. Therefore, generation of bubbles due to reaction with the gap spacer can be prevented. Therefore.

It is possible to eliminate the above-mentioned disadvantages associated with bubble generation, and to manufacture a highly accurate and reliable magnetic head.

As explained above, the present invention provides a winding groove in the gap forming surface of one of the oxide magnetic materials of a pair of oxide magnetic materials, and connects the entire pair of oxide magnetic materials through a gap spacer. The pair of oxide magnetic bodies and the gap spacer are butted together and fully heated to bond the pair of oxide magnetic bodies, and then a track width regulating groove is formed in the integrated oxide magnetic body parallel to the short side direction thereof. Provide multiple at regular intervals,
By forming the core block by completely molding glass within the track width regulating groove, it is possible to produce a highly accurate and reliable oxide magnetic head.

[Brief explanation of drawings]

Fig. 1 shows the prior art, Fig. 2 shows a state where a chip has occurred on the gap forming surface, and Figs. 3, 4, and 5 show the state when the gap forming surfaces are butted against each other. figure,
Figures 6(,) and (b) are diagrams showing the state when a gap spacer is formed on the gap forming surface, Figure 7 is a diagram showing the state when bubbles are generated, and Figure 8 is a diagram showing the state when a gap spacer is formed on the gap forming surface. It is a figure showing one example. 21.22... Oxide magnetic material, 21A, 22A...
Gap forming surface, 21C... Winding groove, 23... Gap, 24.26... Glass, 25A... Track width regulating groove, 27... Core block, 28... Core,
29... Winding patent applicant Akai Electric Co., Ltd. 10 Figure 2 Figure 3 rUl Figure 4 Figure 5

Claims (1)

[Claims] 1. A core block is sliced parallel to its short side direction, the tip of the core is polished, and all the windings are attached to the core using the winding holes to form an oxide magnetic material. In a method for manufacturing a magnetic head, a winding groove is provided in the gap forming surface of one of a pair of oxide magnetic bodies, and the pair of oxide magnetic bodies are butted together via a gap spacer. heating the pair of oxide magnetic materials and the gap spacer;
A pair of oxide magnetic materials are completely adhered, and then. A core block is formed by providing a plurality of track width regulating grooves parallel to the short side direction of the integrated oxide magnetic material at regular intervals, and molding glass in the trunk width regulating grooves. A method for producing an oxide external body magnetic head.