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Coil component

A technology of coil components and coils, applied in transformer/inductor parts, electrical components, transformer/inductor coils/windings/connections, etc., can solve problems such as reduced reliability and achieve high reliability

Active Publication Date: 2021-06-01
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of such a structure, there is a possibility that the reliability may decrease due to the migration of Ag contained in the base electrode.

Method used

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Examples

Experimental program
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Effect test

no. 1 approach

[0031]figure 1 It is a perspective view showing the coil member 1a according to the first embodiment of the present invention.

[0032]figure 2 It is a yz cross-sectional view of the coil member 1a.image 3 It is a partial end view of the coil member 1a.

[0033]Figure 4 It is an exploded perspective of the coil member 1a (but except for the external electrode).

[0034]Such asFigure 1 ~ 4 As shown, the coil member 1a is a so-called common mode choke coil, including a blank 2, a coil disposed inside the blank 2 (includingfigure 2 The first coil 3a and the second coil 3c are disposed on the outer electrode of the surface of the blank 2 (including the outer electrodes 4a, 4b, 4c, and 4d). The blank 2 includes a first glass layer 21, and a first ferrite layer 22 formed on the first main surface of the first glass layer 21 and a second ferrite formed on the second main surface of the first glass layer 21. The layer 23 (in addition, the first ferrite layer and the second ferrite layer are also kno...

no. 2 approach

[0083]Figure 6 It is a Yz cross-sectional view showing the coil member according to the second embodiment of the present disclosure.Figure 7 It is a partial side view of the coil component. The second embodiment differs from the first embodiment in that the blank 2 also includes a second glass layer 24 and a third glass layer 25. Only the different structures will be described below. Further, in the second embodiment, the same reference numerals as those in the first embodiment are the same as those of the first embodiment, and thus the description thereof will be omitted.

[0084]Such asFigure 6 as well asFigure 7 As shown, in the coil member 1b according to the second embodiment, the blank 2 may also include a second glass layer 24 laminated under the first ferrite layer 22 and laminated in the second ferrite layer 23. The third glass layer 25. In this case, the outer electrodes are present through the surface of the second glass layer 24, the first ferrite layer 22, the first glass ...

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Abstract

The invention provides a coil component with high reliability. The coil component is characterized by being provided with a body including a first glass layer, a first ferrite layer formed on a first main surface of the first glass layer, and a second ferrite layer formed on a second main surface of the first glass layer; a coil embedded in the first glass layer; and an external electrode provided across the first ferrite layer, the first glass layer, and the second ferrite layer on a side surface of the green body, in which a width of the external electrode in a region of the ferrite layer is greater than a width of the external electrode in a region of the glass layer in a plan view from a direction perpendicular to the side surface on the side surface of the green body.

Description

Technical field[0001]The present disclosure relates to coil components.Background technique[0002]As an existing coil member, a common mode choke coil is disclosed in Patent Document 1, and the common mode choke coil includes a first non-magnetic body portion formed in a first magnetic body of the lower surface of the first non-magnetic body. The portion is formed on the second magnetic body portion of the upper surface of the first non-magnetic body, which is embedded in the first non-magnetic body portion and is formed by Ag, and the second coil formed, and formed in the first magnetic body The lower surface, the second non-magnetic body of at least one of the upper surfaces of the second magnetic body. In the above common mode choke coil, the outer electrode is formed by sequentially forming a nickel plating layer, tin plating layer or solder plating layer or the like on the base electrode comprising Ag. In the case of such a configuration, it is possible to reduce reliability due...

Claims

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Application Information

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IPC IPC(8): H01F17/00H01F27/28H01F27/29
CPCH01F17/0013H01F27/2804H01F27/292H01F2017/0093H01F2017/0066H01F2027/2809H01F27/29H01F41/043H01F27/323
Inventor 松浦耕平滨野守裕
Owner MURATA MFG CO LTD
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