JPH0668106U - Magnetic head - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to improve the productivity of a composite type magnetic head having good characteristics. [Structure] A head core 2 having a so-called laminated type multilayer magnetic film 4 is provided so as to form a part of a core slider 1, and the laminated type multilayer magnetic film 4 reduces the inductance of a magnetic head. It can sufficiently oppose high coercive force (HC) medium, obtains high sensitivity and low noise characteristics, solves the problem of pseudo output like the conventional MIG type head, and makes head core 2 part of core slider 1. It can be formed at the same time, and the manufacturing process is made more efficient.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic head using a core slider.

[0002]

[Prior art]

 Conventionally, a composite type magnetic head has been widely used as a magnetic head for a hard disk drive (HDD). A composite type magnetic head has a head slider embedded in a core slider made of a non-magnetic member, and the head core is fixed by a glass material. As the head core used in this composite type magnetic head, the one using the MIG type or thin film is generally adopted in order to support a high coercive force (HC) medium, and the magnetic head has a high band. For this reason, the size is reduced to reduce the inductance as much as possible.

[0003]

[Problems to be solved by the device]

 However, in order to miniaturize the composite type magnetic head, it is necessary to greatly improve the level of precision processing, for example, it is necessary to finely process the width of the recording track to about 10 to 15 μm. Therefore, it has been difficult to improve the productivity of magnetic heads. In particular, when a MIG type head core is used, there is a problem in characteristics due to pseudo output.

Therefore, an object of the present invention is to provide a composite type magnetic head having excellent productivity and good characteristics.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a magnetic head in which a head core having a gap is arranged on a core slider made of a non-magnetic member, wherein the head core includes a multilayer magnetic film formed on a part of the core slider. In addition, the above-mentioned multilayer magnetic film has a structure in which a plurality of sets in which a metal magnetic film and an insulating film are stacked are laminated in the track width direction.

[0006]

[Action]

 In the means having such a structure, since the head core having a structure in which a so-called laminated multi-layer magnetic film is applied is used, the magnetic path is formed only by the laminated multi-layer magnetic film. The inductance of the magnetic head is reduced and it can be used in a wide band. In addition, due to the laminated structure of magnetic films having a high saturation magnetic flux density, it is possible to sufficiently oppose a high coercive force (HC) medium, and obtain high sensitivity and low noise characteristics. Further, since the multi-layer magnetic film is arranged orthogonally to the gap, the problem of pseudo output like the conventional MIG type head is solved. In addition, since the head core can be formed at the same time as part of the core slider, the magnetic head can be manufactured efficiently, and the width of the recording track can be controlled with high accuracy by the laminated film thickness.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1, 2 and 3, a head core 2 is provided on one side of the core slider 1 by adhesion. The head core 2 has a substrate 3 which substantially constitutes a part of the core slider 1, and a so-called laminated type multi-layered magnetic film 4 is formed on the substrate 3 and The magnetic film 4 is fixed by the sealing glass 5.

As shown in FIGS. 2 and 3, in particular, the substrate 3 of the head core 2 is arranged so as to face each other so as to form the gap G, and one side surface of each of the substrates 3 and 3 is disposed. That is, on the adhesive surface side to the core slider 1 side, the groove portions 3a, 3a are symmetrically recessed with the gap G as the center. These groove portions 3a, 3a are juxtaposed in the longitudinal direction of the track, and the multilayer magnetic films 4, 4 are laminated and filmed in the track width direction with respect to each of the groove portions 3a, 3a. At the same time, the laminated multilayer magnetic films 4 and 4 are covered with the sealing glass 5. The head core 2 having such a structure is bonded to the core slider 1 via the glass bonding layer 6.

A coil window 7 is formed in a portion of the head core 2 that faces the substrates 3 and 3. A coil window for inputting and outputting a recording / reproducing signal is formed through the coil window 7. (Not shown) is wound around the head core 2.

At this time, the substrate 3 of the head core 2 and the core slider 1 are made of the same material, specifically, a non-magnetic material such as ceramics. As described above, the substrate of the head core 2 is made of the same material. 3 substantially constitutes a part of the core slider 1, and the multi-layer magnetic film 4 is substantially laminated on a part of the core slider 1.

The multi-layered magnetic film 4 is formed by laminating a plurality of sets in which a magnetic film and an insulating film are superposed on each other in the track width direction. Among them, a ferromagnetic metal such as sendust is used as the magnetic film. In addition to being used, a glass material (SiO ₂ ) or the like is used as the insulating film. These magnetic film and insulating film are formed to have a uniform film thickness by a known thin film forming technique, such as sputtering, ion beam sputter or vapor deposition, in order to avoid magnetic saturation. The film is formed to a sufficient thickness as a whole.

As described above, in the present embodiment, since the head core 2 having the so-called laminated type multilayer magnetic film 4 formed thereon is formed as a part of the core slider 1, a composite type magnetic head having high characteristics is provided. Are being produced efficiently. That is, first, the improvement of the characteristics will be described. In this embodiment, since the magnetic path is formed only by the laminated type multilayer magnetic film 4, the inductance of the magnetic head is reduced and the magnetic head can be used in a wide band. Further, since the laminated structure of magnetic films having a high saturation magnetic flux density is formed, it is possible to sufficiently oppose a high coercive force (HC) medium, and high sensitivity and low noise characteristics can be obtained. Further, since the multi-layer magnetic film 4 is fixed by the sealing glass 5, there is no problem such as peeling, and the multi-layer magnetic film 4 is arranged so as to be orthogonal to the gap G. Therefore, the conventional MIG type head is used. The problem of pseudo output such as is solved.

On the other hand, regarding the improvement of the production efficiency, since the head core 2 is formed in a part of the head slider 1, the head slider 1 and the head core 2 are formed at the same time, so that the entire magnetic head is efficient. To be manufactured. At this time, the width of the recording track is controlled with high accuracy by the laminated film thickness.

Next, a process of forming such a magnetic head will be described. First, as shown in FIG. 4 (a), a groove 3a 'is processed on a work 3'to be the substrate 3 of the head core 2, and then the groove 3a' is processed as shown in FIG. 4 (b). The multilayer magnetic film 4'is laminated on the processed surface of'by sputtering or the like. Further, after sealing with the sealing glass 5 ′ as shown in FIG. 4 (c), the multilayer magnetic film 4 ′ thus laminated is subjected to flat polishing as shown in FIG. 4 (d). Is done. Then, a plurality of these work pieces 3 ′ are laminated and adhered to each other as shown in FIG. 4 (e), and then the plurality of stack bodies are formed as shown in FIG. 4 (f). Be disconnected. Then, as shown in FIG. 4G, the head core 2 as shown in FIG. 2 is obtained by slicing after bonding with a predetermined gap material G ′. As shown in FIG. 4H, the head core 2 is joined to the core slider 1 side via the glass bonding layer 6.

[0015]

[Effect of device]

 As described above, the composite-type magnetic head according to the present invention has a head core having a so-called laminated multi-layer magnetic film formed as a part of a core slider, and therefore has a high-performance composite-type magnetic head. The head can be efficiently produced.

[Brief description of drawings]

FIG. 1 is an external perspective view showing the structure of a composite type magnetic head according to an embodiment of the present invention.

FIG. 2 is an external perspective view showing the structure of a head core used in the composite magnetic head shown in FIG.

FIG. 3 is an enlarged plan view showing a gap portion of the composite magnetic head shown in FIG.

FIG. 4 is a process explanatory diagram showing a manufacturing procedure of the composite magnetic head shown in FIGS. 1 to 3;

[Explanation of symbols]

 1 core slider 2 head core 4 multilayer magnetic film G gap

Claims (1)

[Scope of utility model registration request] 1. A magnetic head in which a head core having a gap is arranged on a core slider made of a non-magnetic member, wherein the head core includes a multilayer magnetic film formed on a part of the core slider, and The magnetic head is characterized in that the multi-layer magnetic film is formed by laminating a plurality of sets in which a metal magnetic film and an insulating film are superposed on each other in the track width direction.