JPS61222011A - Composite material for producing magnetic head - Google Patents

Abstract

PURPOSE:To produce a narrow track head having excellent mass productivity and workability by the constitution in which plural substrates formed with thin soft magnetic films are superposed and united by glass welding. CONSTITUTION:The thin soft magnetic film 2 is formed to a required track width on one surface of the nonmagnetic substrate 1 of which surface is finished to a specular surface. The glass 3 having the low m. p. below the heat treatment temp. is laminated thereon and the plural substrates are superposed and are pressurized to melt the glass 3, by which the composite material is obtd. The composite material is sliced so as to incline by as much as the azimuth angle and the back gap part of the correctly mated pair of the films 2 is adhered. The adhered material is sliced and the magnetic head chip is obtd. The easy production of the narrow track head having the excellent mass productivity and workability is thus easily produced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to the structure of materials used in the manufacture of magnetic heads.

[Summary of the invention]

The present invention relates to materials for manufacturing magnetic heaving devices.

By alternately laminating soft magnetic thin films and non-magnetic substrates to form a box structure, a narrow magnetic head can be manufactured using a process similar to that used for manufacturing ferrite.

[Prior art]

Traditionally, magnetic heads were manufactured using the Japanese Patent Publication No. 59-31772.
As in the publication, V1 uses ferrite as the material, and after processing two ferrite wafers into a predetermined shape,
Both wafers were brought together via a thin film to form a block with a magnetic gap formed therein, and the block was sliced to obtain a magnetic head chib. However, in recent years 8tm
With the commercialization of VTRs, high coercive force recording media such as metal tapes were used, and the magnetic head material also shifted to Sendust amorphous alloy, which has higher magnetic permeability than ferrite, and the shape also increased. It has been made narrower due to the density arrangement. Figure IF5 is a perspective view showing the structure of a narrow track. Both sides of the magnetic core material 4 forming a narrow track of 10 to 20 μm are covered with non-magnetic substrates 5.
6, it is necessary to apply the conventional manufacturing process of ferrite heads made of a single material.
I can't do it anymore.

Figure 3 shows an example of the manufacturing process for such a composite narrow track head, in which a soft magnetic thin film such as sendust is formed on a non-magnetic substrate by sputtering using an AK cage 1, and then the warp is reinforced. The plates are stacked and glued together to form a block with a laminate structure like %B. The block is cut into elongated strip cores as shown in C, and a groove forming a winding window is inserted into one of the cores. After mirror-polishing the magnetic gap forming surfaces of both cores, a 8i 0x film having the required gear length is formed on the magnetic gear 9 forming portions by sputtering. Next, both cores are covered with a narrow track h using a soft magnetic thin film.
'-D is the one that was properly mated and bonded, and E is the one that is cut to the size of the magnetic head chip. This is the finished magnetic head I tochi Ipu b-F.

[Problem and purpose to be solved by the invention] Shikajina 6
In the above-mentioned process, the array of core chips is planar, and only a few types of magnetic head chips can be obtained from one set of cores.
I have problems with childbirth and hives. Even when colliding a narrow track using the soft magnetic thin 11K core, the state of track deviation can only be confirmed by the two holes located at both ends of the core.

Another problem is that the size of the workpiece during the final process of cylindrical grinding and thick loading/unloading is 2 to 3 square meters, making it extremely difficult to handle. The present invention is intended to solve these problems, and its purpose is to laminate non-magnetic substrates on which soft magnetic thin films such as sendust or amorphous alloys are formed into blocks, and use the core blocks to manufacture magnetic heads. By using it as a core material in the manufacturing process, it is possible to provide a means for manufacturing a narrow track type head by a manufacturing process that has the same degree of mass productivity and ease of process as conventional ferrite throats.

[Elaborate means to solve problems]

The magnetic helide manufacturing composite material of the present invention is produced by forming a soft magnetic thin film on a plurality of non-magnetic substrates, overlapping the substrates and integrating them using means such as glass fusion. It is characterized by alternating layers of thin films and non-magnetic substrates.

〔Example〕

FIG. 11E1 is a sectional view showing the structure of a composite material in an embodiment of the present invention, and FIG. 4 is a process diagram of a method for manufacturing a narrow track head using the composite material.

Hereinafter, the present invention will be explained in detail using these two figures. First, in Fig. 1, it is a 1 digit non-magnetic substrate, and a soft magnetic thin l! Match the coefficient of thermal expansion to J2 and use a special one. One side of the non-magnetic substrate 1 is mirror-finished, and by a thin layer forming means such as sputtering or vapor deposition,
Soft magnetic thin l such as sendust and amorphous alloy! 2 to the required track width. Here it is formed t
By applying two soft magnetic thin film heat treatments, the magnetic properties h
Z is improved. Next, a fused glass 3 having a melting point lower than the heat treatment temperature is deposited on the soft magnetic thin film 2 by sputtering.
Layer. After completing the above steps, I stacked multiple substrates, held them in a jig, put them in a high temperature furnace while applying pressure, and melted the fused glass 3. get the benefits.

As an example of the magnetic head manufacturing process using the composite material, the process shown in FIG. 4 can be considered. First, the OBN composite material shown in α is cut by a slicer using a diamond grindstone to obtain a pair of core blocks with the soft magnetic thin film layer hz forming tracks tilted by an azimuth angle θ as shown in b. In the conventional ferrite head manufacturing process, a dicer is used to create grooves for track formation in the next processff-
4z, due to the influence of the cumulative pitch error of the dicer, when the tracks at one end of the core block were brought into abutment during the abutment to form the magnetic gear 9, track deviation occurred at the other end. However, this process does not require machining to form tracks, so the above-mentioned problem does not occur, and in this respect it can be said to be superior to the ferrite helide manufacturing process. Next, use a slicer to cut a groove for a winding window into the magnetic gap forming surface of one side of the core block as shown in OK, and then cut a groove into the magnetic gap forming surface of both core blocks.

It is formed by sputtering in % of the required gap length. In the resulting pair of core blocks, the soft magnetic thin film layers serving as the trarifs are properly aligned, and then the pack gap portions are adhered to form a core block exhibiting dYt. The upper surface of the core block is cylindrically ground with a grinding wheel, and finally it is truffled with a grinder to obtain a magnetic held tip f.

〔Effect of the invention〕

As described above, when the present invention is used to manufacture a magnetic head, since it is a composite material in which a non-magnetic substrate and a soft magnetic thin film are laminated and integrated, it is possible to improve both mass production and process difficulty. It has the effect of being able to employ a narrow track manufacturing process that is as good as the manufacturing process.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of the composite material for manufacturing a magnetic head of the present invention. 1...Nonmagnetic substrate 2...Soft magnetic thin film 3...Fusion glass FIG. 2 is a perspective view showing the structure of a narrow track head. 4... Magnetic helide core material 5. 6... Non-magnetic substrate FIG. Fig. 4 α~ is a process diagram showing a method of manufacturing a narrow-skinned track heave using a frayed composite material. that's all

Claims (1)

[Claims] By forming soft magnetic thin films on multiple nonmagnetic substrates, overlapping the substrates, and integrating them using means such as glass fusion, the soft magnetic thin films and nonmagnetic substrates are alternately laminated. A composite material for manufacturing magnetic heads characterized by the following.