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Coil component

A coil component and body technology, which is applied to transformer/inductor components, electrical components, printed inductors, etc., can solve the problems of decreased magnetic particle filling rate, increased resin, frequency limitation, etc., and achieves good inductance characteristics. The effect of ensuring excellent insulation and magnetic permeability

Active Publication Date: 2016-10-12
TAIYO YUDEN KK
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Problems solved by technology

However, in the case of using resin, in order to ensure the strength, it is necessary to increase the amount of resin added, and as a result, the filling rate of magnetic particles decreases, and sufficient magnetic permeability cannot be obtained
On the other hand, in the case of sintering, high magnetic permeability can be obtained, but there is a frequency limit due to the influence of loss, and it is limited as an electronic component such as a portable device.

Method used

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Embodiment Construction

[0017] Hereinafter, the present invention will be described in detail with reference to the drawings as appropriate. However, the present invention is not limited to the forms shown in the drawings, and the drawings may sometimes emphasize the characteristic parts of the invention, so the accuracy of the scale in each part of the drawings is not necessarily guaranteed.

[0018] figure 1 It is a schematic cross-sectional view of a laminated inductor which is a typical example of a coil component. In the following description, a laminated inductor is cited as a specific embodiment of a coil component which is the object of the present invention, but the coil component may be, for example, a transformer, a common mode filter for a power supply, or the like. The multilayer inductor has a structure in which an inner conductor 21 is embedded in a magnetic body portion (a laminated body composed of magnetic body layers). Typically, the inner conductor 21 is a coil formed in a helic...

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Abstract

The invention provides a coil component. The coil component can be further minimized and thinned, at the same time, the insulation property is strong, and the magnetic conductivity is high. The coil component includes a magnetic body, and an internal conductor (21) having a center axis and formed in a spiral shape; wherein the internal conductor (21) is embedded in the magnetic body; in a cross sectional view of a plane that includes the center axis extending in the vertical direction, the magnetic body can be divided into a conductor part (11), which is arranged between neighbored spiral coils, a core part (12), which is arranged in the inner side of spiral coils and comprises the center axis, cover parts (13,14), which are respectively arranged under the lower end of the spiral shape and above the upper end of the spiral shape, and a lateral part (15), which is arranged on the outer side of the spiral coils. The magnetic body comprises ferric soft magnetic particles and at least one oxide membrane of a metal that can be more easily oxidized, compared with iron. At least part of neighbored ferric soft magnetic particles is combined through the oxide membrane, and the oxygen content of the conductor part is greater than the oxygen content of the core part.

Description

technical field [0001] The present invention relates to coil components typified by laminated inductors and the like. Background technique [0002] Recently, in inductor components, high frequency has been demanded along with progress in increasing current. In the past, in order to meet the demand for higher current, research has been going on to replace ferrite materials with Fel-based or alloy-based metal materials. When these metal materials are used, conventionally, magnetic particles are bonded with resin or glass, or magnetic particles are sintered. However, in the case of using resin, the amount of resin added must be increased in order to secure strength, and as a result, the filling rate of magnetic particles decreases, and sufficient magnetic permeability cannot be obtained. On the other hand, in the case of sintering, high magnetic permeability can be obtained, but there is a frequency limit due to the influence of loss, and it is limited as an electronic compon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F17/00H01F27/25
CPCH01F17/0006H01F17/0013H01F27/25H01F17/04H01F27/255H01F2017/0073H01F2017/048H01F41/0246H01F27/2804H01F1/14
Inventor 竹冈伸介山口亚希子大竹健二
Owner TAIYO YUDEN KK
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