JPS6074112A - Magnetic head - Google Patents

Abstract

PURPOSE:To offer a constitution which is suitable for a narrow track magnetic head by forming a magnetic core by a magnetic thin film formed on a magnetic substrate by a thin film forming means. CONSTITUTION:A groove 13 and a winding groove 12 are worked on nonmagnetic substrates 11, 15, and a metallic magnetic film 14 is made to adhere to these substrates 11, 15 by a thickness of 1/2 of a track width by a thin film forming means. Subsequently, in a state that the metallic magnetic film 14 of the substrate 11 is butted, and the groove 13 and the groove 12 are matched, glass is packed and stuck, and a core half body 17 is obtained. A core half body 18 is also obtained in the same way. Next, a gap forming surface of the core half bodies 17, 18 is finished to a specular surface and a nonmagnetic material is stuck. Subsequently, in a state that the metallic magnetic films 14 of both the core half bodies are matched, said glass is heated and welded, a core block 20 is obtained, and by cutting it, a head core is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a borosilicate stylus 1 for V 1'R, which has sufficient recording and reproducing ability especially for high coercivity magnetic recording media U7.

In recent years, in order to increase the density of VTRs, magnetic recording media with a high force (T4') have been developed. Development of magnetic heads for VTRs using metal magnetic + A materials (Ihindust, Amol, Hupusu, etc.) with high saturation magnetic flux density is underway.

In addition, in order to cope with higher density magnetic recording, the head size is required to be smaller than before, and the trunk width is 10 mm.
~25 μm, gear, bulb In (1.2 to 0.3 μm).

However, metal magnetic materials have a disadvantage in that they are significantly more wear resistant than the current) 7-C I...＼RAD materials. Sodo is considered. An example of this is shown in FIG. 1(a), (+)). They are joined through a non-magnetic material to form a working gap 4, and the whole is 1-rack width j1. One layer of protective plates 1 and 3 are attached to the scraped magnetic core 2 from both sides to form a hydrogen oxide dot.

With this configuration, 1Iiii (abrasion resistance is d
However, due to the track width and thickness, the step of depositing the magnetic core reduces the track width [and 1. The disadvantage is that the culm becomes groggy and the magnetic core becomes difficult to handle.

This invention was made in order to eliminate the drawback described in item 7, and includes forming a magnetic core using a thin magnetic thin film in two stages (1, 2) on a non-magnetic substrate. ] The purpose is to provide an optimal configuration for the rack magneto-magnetic spatula.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

First, as shown in FIGS. 2 and 3, a groove 13 and a winding groove 12 are formed on a non-magnetic substrate 11.
Process.

Next, a non-magnetic substrate II provided with the groove 13 and the winding groove 12
, 15, by thin film forming means such as spackling or vacuum deposition, sendust, permanent i
A metal magnetic film 14 such as a carp is attached by sliding the thickness of 2 times the width of the trunk.

(As shown in FIG. 5, the metal magnetic film 14 of the non-magnetic substrate 11 is butted against the groove 13 and the winding groove 12 with the groove 13 and the winding groove 12 aligned and U-shaped.) Glass is filled and bonded to obtain a core half 17 (FIG. 6).A core half 18 paired with this core half 17 is also obtained in the same manner.At this time, the thickness of the metal magnetic film 14 is the track width j7.

Next, the gap forming surface 1 of the core half body 17 and the core half body 18 is
9 to a mirror finish, and Si02, Ae on the gap forming surface.
A non-magnetic material such as 203 is deposited to a predetermined thickness (=J-l) by sputtering, vacuum deposition, etc.

Then, as shown in FIG. 7, with the two 17 halves 17 and +8 metal magnetic films 14 put together, the groove 13 and the winding groove 12 are
The core flock 20 is obtained by heating and welding to the working salinity of the glass filled in the glass.

Furthermore, this core block 20 is cut to form a head core 21.
(Figure 8). Then, the head core 21 is cut at a predetermined slope as shown in FIG. 9, and the cut surface is polished to form a head core 22 as shown in FIG.
get.

In addition, when forming the metal magnetic film j4 on the non-theta group +ff1li15, as shown in FIG.
．． By performing evaporation sputtering using a mask in steps 1 and 15, or by performing etching after depositing a metal film, the necessary portions of the magnetic field 1 and 1 may be formed.

In addition, as shown in FIG.
A structure in which about 10 sheets can be stacked may be strained.

As explained above, according to the present invention, a non-magnetic substrate
- The core half, which forms a predetermined track width by bonding a metal magnetic thin film made by a thin film forming means with a thickness half the trunk width, is bonded to the substrate through a non-magnetic material. Since the magnetic film that forms the trunk has sufficient adhesion strength, the accuracy of the trunk width is determined by thickness control (during the formation of the magnetic film), making it easy to obtain a track width with high precision. It has various excellent effects such as good abrasion resistance because it is thin.

[Brief explanation of the drawing]

Figures 1(a) and 12(t) are perspective views of the 4'+W component of a conventional VTR magnetic head, and Figures 2 to 12 are views showing the 4'+W configuration of a conventional magnetic head for VTR. Related magnetic hem 1
It is an explanatory diagram explaining the direction of ``M''. 11.15...Nonmagnetic substrate, 14...Metal magnetic IIψ, 17.18...Core half-off.

Claims (1)

[Claims] On a non-magnetic substrate, a core half body is bonded via a non-magnetic material to form a predetermined trunk width by bonding a gold-flexible magnetic thin strip made by a thin film forming means with a thickness of half the 1-rank width. Magnetic heno I' characterized by an egg.