JPS6262412A - Floating type magnetic head - Google Patents

Abstract

PURPOSE:To improve a CSS-resistant characteristic and to obtain a magnetic head easy to manufacture by building in a gap part within a sliding rail. CONSTITUTION:Prescribed shape of magnetic substance core carrier bodies 1A and 2A on which a mirror finishing is applied on gap facing planes 1a and 2a are manufactured and at the next, at the upper solid angle of the gap facing planes 1a and 2a, grooves 3 and 4 to decide a track width Tw is provided keeping the space of the track width Tw and furthermore, a non-magnetic substance layer to regulate a gap is formed at the gap facing planes 1a and 2a. Thus formed gap facing planes 1a and 2a are abutted and a glass bar 5 is inserted to a longitudinal groove 2b and the glass bar 5 is melt after a heat treatment and a filling glass layer 5a is formed casing the glass to each of the grooves 3 and 4, and the magnetic substance core carrier bodies 1A and 2A are joined, making a block. By cutting the block and applying a machining in a prescribed shape, plural number of magnetic heads are manufactured from one block.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a floating magnetic head used in magnetic disk drives and the like.

[Conventional technology]

Conventionally, a Winchester-type head (FIG. 4) has been used as a floating magnetic head used in magnetic disk drives and the like.

C8S resistance is one evaluation method that indicates the performance of these floating magnetic heads.

In other words, when the rotation of the magnetic disk starts or stops, the magnetic head repeats floating and contacting the magnetic disk surface, but if this repetition becomes too many, the magnetic head may scratch the magnetic disk surface. , the magnetic disk surface or the magnetic head may be damaged due to the magnetic disk getting caught. There is an evaluation method called ItC8S property that indicates the frequency with which this phenomenon occurs.

However, in order to solve the above problems, it is necessary to
It is necessary to improve the S properties.

Furthermore, as magnetic disk drives have come into wide use, there has been a demand for lower prices for magnetic heads, and it has become necessary to consider ways to simplify the steps involved in manufacturing magnetic heads.

Among the conventional magnetic heads mentioned above, the Winchester type head is the second
As shown in the figure, a magnetic head 2C is protruded from the end of a slide rail 1c provided between the slide rails 1b on both sides, and the thin film head is made of a multilayer film laminated as shown in Fig. 3. Therefore, it is basically difficult to improve the C8S resistance due to its structure.

Furthermore, although the composite head has the advantage of improving C8S resistance, it has a structure in which the magnetic head chip 2c is embedded in the slider 1b, so it has the disadvantage of requiring more manufacturing steps.

An object of the present invention is to provide a magnetic head that can improve the C8S resistance and is easy to manufacture.

[Means for solving problems]

As an embodiment of the floating magnetic head of the present invention is shown in FIG.
One magnetic core 1 has grooves 3.3 formed at intervals of a track width Tt1, and the other magnetic core 2 has grooves 4.4 formed at positions facing the grooves 3.3. The gap facing surfaces 1a and 2a are brought into contact with the opposing grooves 3.
Both the magnetic cores 1.2 are joined by filling the insides of the magnetic cores 1.2 with glass 5a, respectively.

[For production]

With the above structure, the magnetic helad gap is embedded in the slide rail, so the NcSS properties are significantly improved, and both magnetic cores, whose track width is predetermined by groove processing, are joined by glass filling. Since it only requires a few steps, it can be manufactured easily with fewer steps.

〔Example〕

Hereinafter, an example of the manufacturing process of the floating magnetic head of the present invention will be explained in the fifth section.
This will be explained with reference to figures (a) to (e).

First, magnetic core carriers IA and 2A with mirror-finished gap facing surfaces 1a and 2a of a predetermined shape (in this example, one is ■-shaped and the other is C-shaped with a longitudinal groove 2b) are manufactured.
Figure 5(a)), this magnetic core carrier IA
, 2A, grooves 3.3 and 4.4 for determining the track width Tw are provided at the upper corners of the gap facing surfaces 1a and 2a, respectively, at an interval of the track width Tw (in this example, grooves 3.3 and 4.4 are provided at the upper corners of the gap facing surfaces 1a and 2a of Furthermore, a non-magnetic layer (not shown) for regulating the gap is formed on the gap facing surfaces 1a and 2m (FIG. 35(b)). The gap facing surface 1a of the thus formed magnetic core carrier IA, 2A,
2a in contact with each other as shown in FIG. 5(e)'), insert the lath rod 5 into the longitudinal groove 2b (FIG. 5(cl))), perform heat treatment to melt the lath rod 5, and attach the lath rod 5 to each of the grooves 3. 4 to form a filled glass layer 5a, and the magnetic core carrier IA, 2
Join A to form a block (Fig. 5(e)).

By cutting the thus joined blocks and machining them into a predetermined shape, the first FML-8 ÷ 10 toyuna> can be obtained from the time -W-+, -Le--噌鳥-＾--m. (in this example, 3 pieces).

〔Effect of the invention〕

As described above, according to the present invention, since the gap portion is built into the slide rail, C8S resistance is improved, and one or more heads can be manufactured by one bonding process, which makes manufacturing easier. The process is simplified and production can be performed with high efficiency.

In addition, by forming ear parts with the same 7W processing as described above on the slide rails on both sides, it is possible to use magnetic heads of the same shape on both the upper and lower sides. Seed cores can be produced with one core. Furthermore, by switching between the gaps on both sides and operating the disc, the effectiveness of using the disc can be improved.

[Brief explanation of the drawing]

FIG. 11 is a perspective view showing an embodiment of the floating magnetic head according to the present invention; FIG. (b), (e), (d), and (e) are perspective views showing an example of the manufacturing process of a floating magnetic head according to the present invention. 1.2: magnetic core, la, 2a: gap facing surface, 2b: longitudinal groove, 3.4: groove, 5 Niglass rod,
5a: Filled glass layer agent Patent attorney Honma Abrasion resistance 5 Figures (a) (d)

Claims (1)

[Claims] One of the magnetic cores is provided with a groove at an interval of the track width at the end of at least one of the slide rails provided on both sides, and a similar groove is provided at a position opposite to the groove. A floating type magnetic head, characterized in that the two magnetic cores are bonded to each other by abutting surfaces facing the gap between the two magnetic cores and forming a filling glass layer in the opposing grooves.