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Coil component and electronic device

一种线圈部件、电子设备的技术，应用在线圈、印刷电路零部件、变压器/电感的零部件等方向，能够解决电路板温度变化挠曲等问题，达到抑制裂缝的效果

Active Publication Date: 2019-08-06
TAIYO YUDEN KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The circuit board may warp due to temperature changes, etc.

Method used

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  • Coil component and electronic device
  • Coil component and electronic device
  • Coil component and electronic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] FIG. 1( a ) is a perspective view of a coil component of an example, and FIG. 1( b ) is a perspective view of a main body. Fig. 2(a) is a bottom view of the coil component of Example 1, and Fig. 2(b) is a cross-sectional view along line A-A of Fig. 1(a). 3( a ) and FIG. 3( b ) are enlarged cross-sectional views of the vicinity of the tip portion of the external electrode. As shown in Fig. 1(a), Fig. 1(b), Fig. 2(a), Fig. 2(b), Fig. 3(a) and Fig. 3(b), the coil component 100 of Embodiment 1 comprises: a main body 10; the coil 30 built in the main body part 10; the lead-out conductors 34a and 34b drawn out from the coil 30; and the external electrodes 50a and 50b connected to the lead-out conductors 34a and 34b.

[0063] The main body portion 10 is formed in a rectangular parallelepiped shape having a lower surface 12 , an upper surface 14 , a pair of end surfaces 16 and 18 , and a pair of side surfaces 20 and 22 . The lower surface 12 is a mounting surface, and the upp...

Embodiment 2

[0084] 6( a ) is a top view of the coil component of Example 2, FIG. 6( b ) is a bottom view, and FIG. 6( c ) is a cross-sectional view. Such as Figure 6(a) ~ Figure 6(c) As shown, in coil component 200 of Example 2, gap 72a extending from tip 54a of external electrode 50a is formed on upper surface 14 of main body 10 between main body 10 and external electrode 50a. Similarly, on the upper surface 14 of the main body part 10, a gap 72b extending from the front end part 54b of the external electrode 50b is formed between the main body part 10 and the external electrode 50b. That is, the void 72a is open on the front end portion 54a side of the external electrode 50a, and the void 72b is open on the front end portion 54b side of the external electrode 50b. The tip portion 54 a of the external electrode 50 a and the tip portion 54 b of the external electrode 50 b are portions on the upper surface 14 of the main body 10 where the external electrode 50 a and the external electrod...

Embodiment 3

[0088] Figure 7 It is a sectional view of the coil component of Example 3. Such as Figure 7 As shown, in the coil component 300 of the third embodiment, the lead-out conductors 34 a and 34 b are led out from the coil 30 to the lower surface 12 of the main body 10 , and are connected to the external electrodes 50 a and 50 b on the lower surface 12 of the main body 10 . The other configurations are the same as those in Embodiment 1, so explanations are omitted.

[0089] Examples 1 and 2 exemplify the case where the lead-out conductor 34a is led out from the coil 30 to the end face 16 of the main body 10 , and the lead-out conductor 34b is led out from the coil 30 to the end face 18 of the main body 10 . However, it is not limited to this case, and the lead-out conductors 34 a and 34 b may be drawn out from the coil 30 to the lower surface 12 of the main body part 10 as shown in the third embodiment. In this case, it is preferable that the lead-out conductor 34a be exposed f...

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Abstract

The invention provides a coil component and an electronic device. The coil component can inhibit the generation of cracks. The coil component includes: an element body part including a magnetic material; a coil built into the element body part; an external electrode electrically connected to the coil and provided at least on a bottom face of the element body part along a side of the bottom face; and an external electrode electrically connected to the coil and provided at least on the bottom face along a side, opposite the side, of the bottom face; wherein the external electrode has a tip partfacing the external electrode; the external electrode has a tip part facing the external electrode; and a void is formed between the external electrode and the bottom face in a manner extending from the tip part.

Description

technical field [0001] The present invention relates to coil components and electronic equipment. Background technique [0002] There is known a coil component including: a coil built in a main body; and an external electrode provided on the surface of the main body and electrically connected to the coil (for example, Patent Documents 1 and 2). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2005-116708 [0006] Patent Document 2: Japanese Patent Laid-Open No. 2016-58418 Contents of the invention [0007] The problem to be solved by the invention [0008] The coil component is mounted on the circuit board by joining the external electrodes of the coil component to the terminal electrodes of the circuit board with solder. Boards may warp due to temperature changes, etc. When the circuit board is deflected, stress is applied to the external electrodes of the coil component joined to the terminal electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F5/04H01F27/29
CPCH01F5/04H01F27/29H01F2005/046H01F27/292H01F2017/048H01F17/04H05K1/0271H05K3/3442H05K2201/1003Y02P70/50H01F27/2804H05K1/11H01F2027/2809H05K1/181
Inventor 若林博孝
Owner TAIYO YUDEN KK
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