Coil component

Patent metadata

Field	Value
Publication number	US-11133129-B2
Application number	US-201816175746-A
Country	US
Kind code	B2
Filing date	Oct 30, 2018
Priority date	Apr 25, 2018
Publication date	Sep 28, 2021
Grant date	Sep 28, 2021

Abstract

A coil electronic component includes a body including an internal coil including first and second end portions, and an encapsulant surrounding the internal coil and formed of a magnetic material, and first and second external electrodes disposed on external surfaces of the body. The body includes a first surface and a second surface to which the first and second end portions are led, respectively, and which oppose each other, a third surface connecting the first and second surfaces to each other and perpendicular to a center of a core of the internal coil, and a fourth surface opposing the third surface, and a first corner connecting the first surface and the third surface to each other and a second corner connecting the second surface and the third surface to each other include first and second recess portions, respectively.

First claim

What is claimed is:

1. A coil electronic component comprising:
a body including an internal coil including first and second end portions, and an encapsulant surrounding the internal coil and including a magnetic material; and
first and second external electrodes disposed on external surfaces of the body and connected to the first and second end portions of the internal coil, respectively,
wherein the body includes a first surface and a second surface to which the first and second end portions are led, respectively, and which oppose each other in a length direction of the body, a third surface connecting the first and second surfaces to each other and being perpendicular to a center of a core of the internal coil, and a fourth surface opposing the third surface,
a first corner connecting the first surface and the third surface to each other and a second corner connecting the second surface and the third surface to each other include first and second recess portions, respectively,
first and second insulating layers are disposed on the third surface and the fourth surface, respectively,
the first and second external electrodes extend to the first and second recess portions, respectively,
a maximum thickness of the coil electronic component is a distance between a lower surface of the first insulating layer and an upper surface of the second insulating layer, and
each of the first and second insulating layers is in contact with the encapsulant and is spaced apart from the internal coil.

2. The coil electronic component of claim 1 , wherein a thickness of the first insulating layer is less than that of the second insulating layer.

3. The coil electronic component of claim 1 , wherein the shortest distance between the first and second recess portions is equal to a length of the first insulating layer.

4. The coil electronic component of claim 1 , wherein a side surface of each of the first and second recess portions is disposed on the same line as the innermost surface of the internal coil.

5. The coil electronic component of claim 1 , wherein a length of first insulating layer in the length direction is less than a length of second insulating layer in the length direction.

6. The coil electronic component of claim 1 , wherein each of the first and second external electrodes includes a first electrode layer which is directly connected to the first and second end portions, a second electrode layer surrounding the first electrode layer, and a third electrode layer surrounding the second electrode layer.

7. The coil electronic component of claim 6 , wherein the first electrode layer includes the same material as that of the internal coil.

8. The coil electronic component of claim 6 , wherein the second and third electrode layers are a nickel (Ni) layer and a tin (Sn) layer, respectively.

9. The coil electronic component of claim 1 , wherein the first and second insulating layers are in the form of a film.

10. The coil electronic component of claim 9 , wherein the first and second insulating layers include a curable resin.

11. The coil electronic component of claim 1 , wherein the body further includes a fifth surface and a sixth surface opposing each other and parallel to the center of the core of the internal coil, and
the coil electronic component further comprises third and fourth insulating layers disposed on the fifth and sixth surfaces, respectively.

12. The coil electronic component of claim 11 , wherein a thickness deviation of each of the third and fourth insulating layers is greater than that of each of the first and second insulating layers.

13. The coil electronic component of claim 1 , wherein a third corner connecting the first surface and the fourth surface to each other and a fourth corner connecting the second surface and the fourth surface to each other further include third and fourth recess portions, respectively.

14. The coil electronic component of claim 13 , wherein the first external electrode is continuously disposed from the first recess portion to the third recess portion, and the second external electrode is continuously disposed from the second recess portion to the fourth recess portion.

15. The coil electronic component of claim 13 , wherein the shortest distance between the third and fourth recess portions is equal to a length of the second insulating layer.

16. The coil electronic component of claim 13 , wherein the body has a maximum thickness along the center of the core of the internal coil.

17. The coil electronic component of claim 13 , wherein a side surface of each of the first and second recess portions is disposed on the same line as the innermost side surface of the internal coil, or is disposed to be closer to the external surfaces of the body than the same line.

18. The coil electronic component of claim 13 , wherein a side surface of each of the third and fourth recess portions is disposed on the same line as the innermost side surface of the internal coil, or is disposed to be closer to the external surfaces of the body than the same line.

19. The coil electronic component of claim 13 , wherein a thickness of the first insulating layer is substantially the same as that of the second insulating layer.

20. A coil electronic component comprising:
a body including an internal coil including first and second end portions, and an encapsulant surrounding the internal coil and including a magnetic material; and
first and second external electrodes disposed on external surfaces of the body and connected to the first and second end portions of the internal coil, respectively,
wherein the body includes a first surface and a second surface to which the first and second end portions are led, respectively, and which oppose each other in a length direction of the body, a third surface connecting the first and second surfaces to each other, and a fourth surface opposing the third surface,
a first corner connecting the first surface and the third surface to each other and a second corner connecting the second surface and the third surface to each other include first and second recess portions, respectively,
the first external electrode extends from the first surface to the first recess portion, and the second external electrode extends from the second surface to the second recess portion,
first and second insulating layers are disposed on the third surface and the fourth surface, respectively,
the first insulating layer protrudes with respect to an extending portion of the first external electrode to the first recess portion and an extending portion of the second external electrode to the second recess portion, and
each of the first and second insulating layers is in contact with the encapsulant and is spaced apart from the internal coil.

21. The coil electronic component of claim 20 , wherein the body further includes a fifth surface and a sixth surface opposing each other,
the coil electronic component further comprises third and fourth insulating layers disposed on the fifth and sixth surfaces, respectively, and
a thickness deviation of each of the third and fourth insulating layers is greater than that of each of the first and second insulating layers.

22. The coil electronic component of claim 20 , wherein a length of first insulating layer in the length direction is less than a length of second insulating layer in the length direction.

Assignees

• Samsung Electro Mech

Inventors

• Lee Young Il
• Moon Byeong Cheol

Classifications

• H01F27/292 Primary

  Surface mounted devices · CPC title

• H01F27/324

  Insulation between coil and core, between different winding sections, around the coil; Other insulation structures · CPC title

• H01F27/022

  Encapsulation · CPC title

• H01F2017/002

  Details of via holes for interconnecting the layers · CPC title

• H01F27/29

  Terminals; Tapping arrangements {for signal inductances} · CPC title