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Coil component

A technology of coil components and coils, which is applied in the direction of transformer/inductor parts, electrical components, transformer/inductor coils/windings/connections, etc., which can solve the problems of reduced reliability, insufficient sealing of coil conductor layers, and cracks in coil conductor layers And other problems, to achieve the effect of not easy to crack, prevent cracks, and high strength

Active Publication Date: 2021-02-05
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it can be seen that in conventional coil components, cracks may be generated around the coil conductor layer.
As a result, the sealing with respect to the coil conductor layer is insufficient, and there is a possibility that the reliability may be lowered.

Method used

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  • Coil component
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0047] figure 1 It is a perspective view which shows 1st Embodiment of a coil component. figure 2 yes figure 1 The shown X-X sectional view of the first embodiment is a LT sectional view passing through the center in the W direction. image 3 It is an exploded plan view of the coil component, and the diagrams along the T direction are shown from the lower figure to the upper figure. In addition, the L direction is the longitudinal direction of the coil component 1, the W direction is the width direction of the coil component 1, and the T direction is the height direction (1st direction) of the coil component 1.

[0048] Such as figure 1 As shown, the coil component 1 has: a main body 10 , a coil 20 provided inside the main body 10 , and a first external electrode 31 and a second external electrode 32 provided on the surface of the main body 10 and electrically connected to the coil 20 .

[0049] The coil component 1 is electrically connected to the wiring of a circuit boa...

no. 2 Embodiment approach

[0114] Figure 7 It is an enlarged cross-sectional view showing the coil conductor layer 21 included in the coil component 1 of the second embodiment and the cavity portion 51 provided on the lower surface of the coil conductor layer 21 . In this embodiment, the coil conductor layer 21 has an oval shape. In the second embodiment, except that the shape of the coil conductor layer 21 has Figure 7 Other than the shown shape, it has the same structure as the coil component 1 of 1st Embodiment. Description of the same configuration as that of the first embodiment is omitted.

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Abstract

The invention provides a coil component which is not liable to generate cracks around a coil conductor layer. A coil component in which a crack is rarely generated around a coil conductor layer. The coil component includes an element body; and a coil provided in the element body and spirally wound along a first direction. The coil has a plurality of coil conductor layers stacked along the first direction. The element body has a vicinity area located in a vicinity of each of the coil conductor layers, and has a non-vicinity area other than the vicinity area. The vicinity area has a pore area rate less than a pore area rate in at least a part of the non-vicinity area.

Description

technical field [0001] The present invention relates to coil components. Background technique [0002] Conventionally, as a coil component, there exists a thing described in Unexamined-Japanese-Patent No. 2002-043156 (patent document 1). This coil component includes a main body and a coil inside the main body. The main body is formed by stacking a plurality of insulating layers, and the coil is formed by stacking a plurality of coil conductor layers. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2002-043156 [0004] However, it has been found that in conventional coil components, cracks may be generated around the coil conductor layer. As a result, the sealing with respect to the coil conductor layer is insufficient, and there exists a possibility that reliability may fall. Contents of the invention [0005] An object of the present invention is to provide a coil component in which cracks are less likely to occur around a coil conductor layer. [0006] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F17/00H01F27/28
CPCH01F17/0013H01F27/2804H01F2017/002H01F2017/0066H01F2027/2809H01F41/043H01F17/04H01F27/292H01F27/24H01F27/29
Inventor 酒井崇史
Owner MURATA MFG CO LTD