JPS58115613A - Magnetic head - Google Patents

Abstract

PURPOSE:To obtain a magnetic head having such structure that mass-production is facilitated without spoiling the effect obtained by sticking a bulk material with high magnetic permeability to a magnetic thin film having high magnetic permeability. CONSTITUTION:In a figure, 1 is the magnetic thin film with high magnetic permeability formed while sandwiched between substrates 5 and 7 is the bulk material with high magnetic permeability installed in contact with one end surface of said thin film. Then, the bulk material 7 and the opposite end surface of the thin film 1 are opposed to a recording medium 2 and a bulk material with high magnetic permeability which has winding is arranged facing said thin film with the recording medium between, thus performing recording and reproduction.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head for recording and reproducing a 4-meter straight recording system in which the magnetic field is distributed in the thickness direction of the medium.

Conventional ag & journal recording is a longitudinal recording method in which the recording medium is lengthened to 217 cm in the longitudinal direction from t1 to os1 by a ring field head. , it is possible to achieve a much higher record WIL than the longitudinal recording force type. In this perpendicular magnetic recording method, in order to make the recording medium Km thick in the thickness direction, the ring reservoir head passed through to magnetize the recording medium in the longitudinal direction is placed directly opposite the recording medium K [I]. Therefore, this low-mK recording/playback method is more suitable.

An example of a perpendicular magnetic recording system in which a large magnetic thin *VS head is directly opposed to the recording medium Kfi is shown in Figure @tl141.
In the figure, 1 is a high permeability magnetic thin film, 2 is a recording medium,
The ink is a bulk shaving of 0 @ magnetic permeability such as winding wire, 4-class light, etc. (-) is a high magnetic permeability thin 11K m:i! roll! 1
'gl: Excitation and cnv excitation (ff, tb)
is a method of excitation via bulk @4 of Aals rate. In these methods, the actual SO configuration for the high am rate smom is shown in Figure 11R2.
The thin JII 111 is sandwiched between substrates 5 that are held and protected.

Now, as in #1 s l1tt, if the edge of the thin j111 is slightly set back from the end face 6 facing the recording medium 2, and a high magnetic permeability bulk @7v1 is attached to the opposite side of the bakuzen,
It is known that the magnetic flux concentrates on the tip 6 of the wide section (&j1 sickle/regeneration efficiency is very high).

At present, in the laboratory stage, the K constituting the magnetic head shown in Fig. 3 (4) is first manufactured by (7) substrate 5 as shown in Fig. tR4.
(a) add magnetic material such as ferrite to the bulk material 7';
9I: Polish the 11141 to the bulk shaved flat 1
iii! - out;'t lk s) ^ magnetic permeability magnetic thin m
1' After forming by sputtering etc., (e) etching it into the desired shape, and (2) forming it on the same machine as A-1.
Pasted with 9, (Monk tip 101j% Iki bulk *47
It has been polished to the vicinity of , giving it a magnificent look. What is the K that makes up a magnetic head like the one shown in the irises S diagram? ! In addition, there is a notch to voice the M*SK% line.

Such a constituent force method is unsuitable for mass production, and a magnetic head having a structure that facilitates #I formation is desired.

In view of the above circumstances, the present invention is a 7-ton structure made of 7-ton magnetic material.The purpose of the present invention is to attach a bulk material with high magnetic permeability to a permeable magnetic thin knit, and to create a structure that can be easily mass-produced without losing the effect. The purpose is to provide a magnetic head with a magnetic head. Below, I will briefly explain unresolved IQ based on actual examples.

#I5 Figure 5 shows an example of the configuration of a magnetic head according to the present invention.
In the same 1k, it is inserted into the IFi substrate 5 and formed.
It is a high magnetic permeability magnetic thin film, and 7 is one trend 1 of the magnetic thin film.
It is a bulk material with magnetic permeability because it is installed in a structure that is in contact with 1kliil. It is highly desirable that the thin film and the bulk material be completely joined, but even if there is a slight gap, there is no practical problem.

In this actual JlI-2, the thin film on the side opposite to the bulk material is placed opposite to the mrkt recording medium, and the recording medium is sandwiched between the recording medium and the position facing the thin film is placed in Volume I! A thin bulk material with high magnetic permeability is installed, and recording/reproduction is performed by the method explained in %*1 figure ff1J.

Figure 1lI6 is another embodiment of the present invention. 1 is a high permeability magnetic 4Is formed between two plates S, and 11I9I! facing the recording medium. : It has a narrow shape and is designed to easily concentrate magnetic flux. The magnetic head of No. 7 is a bulk material with high magnetic flux, and the magnetic head of No. 6 is equivalent to the magnetic head shown in FIG. 95(a).

Example V of the manufacturing method of the S air head according to the present invention FIG.
explain. First, (7) - a long base with a flat surface @
S is formed on high permeability magnetic thin #1 such as permalloy by sputtering, and (a) etched into the desired (Δ type) shape a. Next, cut (glue the cut substrates 5r together and insert 2 thin strips into the holes), and (3) cut the end surface of the
Bulk of high-speed SLS such as densely packed ferrite @ 7 small pieces tW! Attach, (g) sharpen and polish the other force O end UkJIH. 1fOFi facing the recording medium, flat [i
You can go all out and make just the corners smaller, or you can give the whole thing an appropriate curvature. In this way, the addition of a bulk material with high magnetic permeability to increase the recording/reproducing efficiency in the magnetic head described in this book is extremely important.

1 sink alii! The structure shown in FIG. 2 is a U-shaped high magnetic permeability bulk @ 7 which is wound at, and is attached to a high permeability magnetic thin film 1111 which is sandwiched between the substrate 5. The structure shown in FIG.

According to the above-mentioned method, according to the present invention, a high-efficiency structure 't=,L darkness rate, which is the same in terms of magnetic circuit as a high-permeability bulk material attached to both sides of a high-permeability thin film, can be obtained. It can be realized with a structure suitable for mass production.

[Brief explanation of drawings]

Figure 1 is a diagram for explaining the perpendicular magnetic period. FIG. 2 is a diagram showing the structure of the high-speed a1 rate magnetic #ls portion of the a-air head. #! Figure 5 is a preliminary diagram illustrating the lateral movement of a high permeability bulk @r attached to a high permeability magnetic thin film. Figure 4 is the current one! A diagram for explaining the manufacturing process 1e of the air head. #! 5 and 111.6 are diagrams showing configuration examples of the magnetic head according to the present invention. FIG. 117 is a companion diagram illustrating an example of the manufacturing process of the magnetic head according to the invention. FIG. 8 is a diagram showing the configuration e'Ilt of a magnetic head according to the present invention. 1... High magnetic permeability thin film thin 112... Recording medium %S...
Wire 4...High magnetic permeability bulk material 5...Group@6...
・A jail (t
i 7... High magnetic permeability bulk material 8... Stretching table wall surface 9... Substrate embedded with high-speed rate bulk @ 1o
...a! Above the surface facing the recording medium of the so-called head
Engineering X ¥! +1 Talent'lJ'712!1 r#, I? of

Claims (1)

[Claims] It is composed of a thin film made of a high aa rate conductive material, and a bulk shaver that attacks from a high magnetic permeability material that is close to or in contact with one end surface of the thin film. - A magnetic head that records and plays data while facing the medium.