JPH0684632A - Coil component - Google Patents

Abstract

PURPOSE:To obtain a coil component being employed in magnetic head, inductor, or transformer in which the size and thickness are reduced by the use of thin film while simplifying the production process. CONSTITUTION:Core 5 section is made of a ferromagnetic oxide block and then a coil conductor layer 6 and a dielectric layer 7 are laminated thereabout through thin film deposition technology thus forming a coil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil component used in a magnetic head, an inductor, a transformer or the like.

[0002]

2. Description of the Related Art As a coil component used for an inductor or a transformer, there is a coil method by a printing method or a sheet method. In the form of
Alternatively, since sheet-shaped products are stacked and molded and fired, it is inevitable that micron-order thickness unevenness will occur, and if a micron-order film is to be formed, problems such as insulation failure or wire breakage will occur. Occurs,
As a result, there is a problem that it is not possible to obtain an inductor, a transformer, or a magnetic head that is thinned to this level. Further, in a conventional thin-film magnetic head for a hard disk used for a computer memory or the like, a magnetic substance such as sendust or permalloy forming a magnetic path has conductivity, so that the insulation between the magnetic layer and the coil conductor layer is prevented. Therefore, the resin layer is formed, and for each resin layer, the steps of curing, polishing, and forming a film on the resin layer are performed for several tens of turns. Costly.

In view of the above-mentioned circumstances, the present invention makes it possible to reduce the size and thickness of a coil component used in a magnetic head, an inductor, or a transformer by using a thin film, simplify the manufacturing process, and reduce the cost. It is an object of the present invention to provide a coil component capable of achieving the above.

[0004]

In order to achieve the above object, the present invention provides a laminated structure of a coil conductor layer and an insulator layer around the core portion made of a ferromagnetic oxide block by a thin film forming technique. It is characterized in that a coil is formed.

[0005]

In the present invention, the laminated structure of the coil conductor layer and the insulator layer, which is much thinner than that by the printing method, is formed on the outer periphery of the core portion formed in advance in a block shape by the thin film forming technique. Will be realized.

[0006]

1 (a) to 1 (e) show a manufacturing process of an embodiment of a coil component used as an inductor according to the present invention, (f) is a perspective view thereof, and (g) is a magnetic head. It is a front view which shows the application example of. As shown in the perspective view of FIG. 1A, in the present invention, the magnetic ferrite block-shaped core 5 is formed into a rectangular parallelepiped shape by baking or the like. In this embodiment, the core 5 has dimensions of 0.4 mm in length, 0.2 mm in width and 0.4 mm in height. A coil conductor layer 6 and an insulator layer 7 made of a metal such as silver are formed around the core 5 by a thin film forming technique such as vapor deposition or sputtering as shown in the cross-sectional views of FIGS.
And are alternately laminated to produce the coil component material 1A.

More specifically, as shown in FIG. 2, first, the core 5 of the core is positioned by adhesion or mechanical fixing means, and the coil conductor is wound around the outer periphery of the core 5 by vapor deposition or sputtering. The layer 6g is formed to have a film thickness of, for example, about 1 micron (a), and the coil conductor layer 6 is formed.
An insulating layer 7g made of silicon dioxide or the like is formed to a thickness of several microns by vapor deposition or sputtering so as to cover half of g (b), and then the coil conductor layer 6g is partially overlapped with one side made of silver or the like. The coil conductor layer 6h is formed (c). Subsequently, an insulator layer 7h is formed so as to cover a part of the coil conductor layer 6h (d), and the other side coil conductor layer 6i is formed by partially overlapping the one side coil conductor layer 6h (e). ). After that, after repeating the steps of FIGS. 1B to 1E by the required number of turns, a coil conductor layer 6j at the end of winding is formed (f),
The coil component material 1A is produced.

Actually, since the material 1A is formed simultaneously by taking a large number of pieces, the material 1A is cut off from a material containing a large number of material 1A and a laminated portion formed between individual core portions is processed to form the individual material 1A. 1 and then the cross-sectional view of FIG.
As shown in the perspective view of (f), a conductor layer 6a made of silver or the like, which serves as extraction electrodes, is formed on the upper and lower ends by baking or plating, and only the conductor layer 6a is exposed to expose the entire outer periphery to the insulator layer 7a. Then, the coil component 1 as an inductor is manufactured. For example, in the case of a magnetic head for a hard disk used in a computer memory or the like, as shown in FIG. 1 (g), the core 9 has a part of the front and back surfaces exposed (see FIG. 1 (d)). (Shown in step 1) is incorporated and bonded with glass or the like. 10 is a magnetic gap.

As described above, the coil conductor layer 6 and the insulating layer 7 are alternately laminated by the thin film forming technique on the outer periphery of the core 5 to produce the coil component 1, so that the thickness per coil winding can be increased. Since the thickness can be set to several μm or less, the coil component 1 can be miniaturized and thinned.

[0010]

According to the present invention, a core made of a ferromagnetic oxide is used as a core, and a coil conductor layer and an insulator layer are alternately laminated on the outer periphery of the core to form a coil component. Therefore, even if the coil conductor layer is thin, there is no risk of disconnection or insulation failure, and it is possible to achieve downsizing and thinning. Further, since the core itself has an insulating property, it is not necessary to electrically insulate the coil conductor, the manufacturing process for obtaining the magnetic head is simplified, and the cost can be reduced.

[Brief description of drawings]

FIG. 1A is a perspective view showing an example of a core of a coil component according to the present invention, FIGS. 1B to 1E are sectional views showing a thin film forming process around the core, and FIG. 1F is a perspective view of the embodiment. , (G) are front views showing an example in which the embodiment is applied to a magnetic head.

FIG. 2 is a plan view showing a manufacturing process of the example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil component 1A Coil component material 5 Core 6, 6g-6j Coil conductor layer 6a Extraction electrode 7, 7a, 7g, 7h Insulator layer

Claims (1)

[Claims] 1. A coil component in which a core is made of a ferromagnetic oxide block, and a coil having a laminated structure of a coil conductor layer and an insulator layer is formed around the core by a thin film forming technique.