JPH03187007A - Production of magnetic head - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention applies to magnetism for magnetic recording. related.

2. Description of the Related Art Methods for Manufacturing Heads [Prior Art] Conventional magnetic heads generally include a bulk head made by mechanical processing and a thin film head made by thin film forming processing.

Although the general TX bulk head and thin film head each have many performance advantages, the manufacturing process is complicated and automation is difficult, resulting in high manufacturing costs.

Recently, as information has become more sophisticated, demands on printers, which are computer output devices, have become more sophisticated. Examples include high-speed printing, high-speed multi-copyability, high-quality printing, and printing stability.

In this situation, magnetic printers are attracting attention. In order to increase the speed of a magnetic printer, it is conceivable to use multiple magnetic heads.

However, the use of multiple magnetic heads increased the cost of the large width TL of the magnetic printer, making it difficult for the product to be accepted by the market.

Therefore, conventional magnetic printers have responded to higher speeds by reducing the number of magnetic heads as much as possible and increasing the rotational speed of the magnetic drum.

[Problem to be solved by the invention] However, in the above-mentioned magnetic printer, the load is placed on the frame, chassis, motor, power supply, etc., so overall the negative factors in terms of cost and size outweigh the negative factors, making it a market success. I haven't.

Furthermore, even if attempts are made to make thin-film heads multi-dimensional, it is difficult to achieve dimension and positional accuracy around the gap, such as gap depth.

The present invention is intended to solve these problems, and its purpose is to manufacture a floating multi-magnetic head such as a hard disk head at low cost and with high precision. be.

[Means for Solving the Problems] As shown in FIGS. 1 to 5, the method for manufacturing a magnetic head of the present invention involves cutting a magnetic material by dicing to provide unevenness. This curved part is called the main magnetic pole of this head.

Magnetic materials used here include amorphous metal iron, ferrite, and the like.

Next, the excitation coil, which has been made into a spiral or helical shape, is inserted into the main magnetic pole as shown in Figure 4, and a protective film is formed (see Figure 5) to complete the magnetic pole part. let

Next, after processing the slider part in the shape shown in Figure 6,
The head was completed by gluing the previous magnetic pole part. (See FIG. 7) [Operation] According to the method described above, it is possible to levitate a multi-magnetic head on a rotating magnetic drum, and it has the advantage of being easier to manufacture than the conventional method.

[Example 1 (Example 1)] Hereinafter, the present invention will be described in detail based on Examples.

The ferrite material is diced to a predetermined size (thickness 5
0 μrrL) and then cut into a shape as shown in FIG. 5 using the same device to form a magnetic pole. The main magnetic pole width at this time is 4
It was set to 0 μm.

Next, a spiral coil completed by winding a copper wire around a core rod was inserted into the main magnetic pole to form an excitation coil, and the magnetic pole part was completed.

Furthermore, a slider portion as shown in FIG. 6 was processed using ferrite material.

Then, the main magnetic pole part and the slider part were bonded together using an epoxy adhesive as shown in FIG. 7 to complete a floating magnetic head.

Next, after applying 30 μm of non-magnetic nickel phosphor plating to pure iron, a magnetic recording medium on which a Co, Ni, and P ferromagnetic film of 500 Oe Hc, 7000 Gauss Br, and 2 μm thick Co, Ni, and P ferromagnetic films was formed was used. A written evaluation was conducted.

For writing evaluation, first of all, the magnetic drum was set at 4000 rpm.
The object was rotated at a speed of 300 m, and the magnetic hect was gradually brought closer to levitate it in a wind of about 3 μm.

The coil diameter of the magnetic hect was 40 μm, the number of turns was 20 turns, the writing current value was 400 fiA, and the writing frequency was 250 KHz.

After writing, the formation of a latent image was confirmed using a magnet via, and then magnetic toner was attached magnetically, and it was confirmed that sufficient adhesion and selectivity were obtained.

From the above experiment, the performance of the magnetic head produced by this manufacturing method is as follows.
It turned out to be good.

(Example 2) Ferrite material is diced to a predetermined size (thickness 5
0μrIL), and then cut into the shape shown in Figure 5 using the same device to form a magnetic pole. The FiIi pole width at this time was 50 μm.

In addition, regarding the formation of the excitation coil section, first
A steel wire with a door diameter of 100 μm was attached in a spiral shape to a thick film, a hole was made at the center of the coil, and the coil was inserted into the magnetic pole and bonded to complete the magnetic pole part. (See Figure 8) Furthermore, the slider part was processed using ferrite material as shown in Figure 8.

Then, the main magnetic pole part and the slider part were bonded together using an epoxy adhesive as shown in FIG. 7 to complete a floating magnetic head.

Next, after applying 50μ non-magnetic nickel plating to pure iron, Hc500 Oersted, Br70on Gauss, M
The writing evaluation shown in Example 1 was performed using a magnetic recording medium on which a 2 Am thick Oo, Ni, P ferromagnetic film was formed.

After writing, after confirming latent image formation with Magnet Pure, magnetic toner was magnetically attached, and it was confirmed that sufficient adhesion and selectivity were obtained.

From the above experiment, the performance of the magnetic head produced by this manufacturing method is as follows.
It turned out to be good.

[Effects of the Invention] As described above, the method for manufacturing a magnetic head of the present invention makes it possible to supply a low-cost magnetic head that can fly, and has a great advantage particularly for multi-magnetic heads.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a bulk magnetic material with high magnetic permeability. Figure 2 is a conceptual diagram of cutting bulk magnetic material to a predetermined thickness. FIG. 5 shows # origin of the main magnetic pole ((α)...Front view (b)...Plan view). Figure 4 is a conceptual diagram of a coil inserted into the magnetic pole. Figure 5 is a conceptual diagram of a coil inserted between magnetic poles and then filled with adhesive and hardened. Figure 6 is a conceptual diagram of the slider shape. Figure 7 is a conceptual diagram of a complete body in which the slider part and the magnetic pole part are pasted together. Figure 8 is a diagram showing the lamination of a bulk magnetic material and a substrate equipped with an excitation coil. 1... High permeability magnetic material 2...
...Main pole 5...Exciting coil 4...Adhesive layer 5...Spiral coil 6 provided on the film ...Film 7...Magnetic pole part Fig. 1 Fig. 2 Fig. 3 (α) Fig. 3 (117) Fig. 4 Fig. 5 Fig. 6

Claims (1)

[Claims] 1. A method for manufacturing a magnetic head, characterized in that a spiral coil or a helical coil is inserted into a main pole made of a bulk magnetic material with high magnetic permeability to form an excitation coil, and a magnetic pole part and a slider part are bonded together.