Coil component

Patent metadata

Field	Value
Publication number	US-11705267-B2
Application number	US-201916550870-A
Country	US
Kind code	B2
Filing date	Aug 26, 2019
Priority date	Apr 16, 2019
Publication date	Jul 18, 2023
Grant date	Jul 18, 2023

Abstract

A coil component includes a body having one surface and the other surface opposing each other, and one side surface and the other side surface, respectively connecting the one surface and the other surface to each other and opposing each other in one direction, a wound coil embedded in the body, a lead portion extending from an end of the wound coil to one surface of the body and disposed on the one surface of the body, an insulating layer covering one surface of the body and having an opening exposing a portion of the lead portion and extending in the one direction, and an external electrode disposed in the opening and connected to the lead portion. The insulating layer includes finishing portions respectively disposed on opposing sides of the opening in the one direction.

First claim

What is claimed is:

1. A coil component comprising:
a body having one surface and the other surface opposing each other, and one side surface and the other side surface, respectively connecting the one surface and the other surface to each other and opposing each other in one direction;
a wound coil embedded in the body;
a lead portion extending from an end of the wound coil to the one surface of the body and disposed on the one surface of the body;
an insulating layer covering the one surface of the body, and having an opening exposing a portion of the lead portion and extending in the one direction; and
an external electrode disposed in the opening and connected to the lead portion,
wherein the insulating layer includes first finishing portions respectively disposed on opposing sides of the first opening in the one direction, and
a portion of the first finishing portions is in contact with the lead portion.

2. The coil component of claim 1 , wherein the insulating layer further includes a second opening exposing another portion of the lead portion, the first and second openings disposed in the one direction.

3. The coil component of claim 2 , wherein the insulating layer further includes a second finishing portion disposed between the first and second openings.

4. The coil component of claim 2 , wherein the external electrode includes first and second external electrodes respectively disposed in the first and second openings.

5. The coil component of claim 1 , wherein the body comprises a magnetic metallic powder particle, and
an exposed surface of the magnetic metallic powder particle exposed to a region of one surface of the body, the region corresponding to the opening, is provided with an insulating film disposed thereon.

6. The coil component of claim 5 , wherein the insulating film surrounds a surface of the magnetic metallic powder particle.

7. The coil component of claim 1 , wherein the body comprises a magnetic metallic powder particle covered by an insulating film which separates the magnetic metallic powder particle from the insulating layer.

8. The coil component of claim 7 , wherein the insulating film separating the magnetic metallic powder particle from the insulating layer is in direct contact with the insulating layer.

9. The coil component of claim 1 , wherein the body comprises a magnetic metallic powder particle covered by an insulating film which is exposed by the opening.

10. The coil component of claim 9 , wherein the insulating film separates the magnetic metallic powder particle from the external electrode and is in direct contact with the external electrode.

11. The coil component of claim 1 , wherein at least a portion of the external electrode extends onto the insulating layer.

12. The coil component of claim 1 , wherein a groove corresponding to the lead portion is disposed in one surface of the body.

13. The coil component of claim 1 , wherein the body comprises a molded portion and a cover portion disposed on the molded portion, and
the wound coil is disposed between the molded portion and the cover portion.

14. The coil component of claim 1 , wherein the insulating layer covers the one side surface and the other side surface, the other surface, and end surfaces connecting the one side surface and the other side surface to each other.

15. The coil component of claim 1 , wherein an area of the external electrode on the one surface of the body is greater than an area of the lead portion on the one surface of the body.

16. A coil component comprising:
a molded portion having one surface and the other surface facing each other;
a wound coil disposed on the other surface of the molded portion;
a cover portion disposed on the other surface of the molded portion to cover the wound coil;
a lead portion connected to the wound coil and exposed from the one surface of the molded portion; and
an insulating layer disposed on the one surface of the molded portion, and having an opening extending in a width direction of the molded portion to expose a portion of the lead portion,
wherein the insulating layer includes finishing portions disposed on opposing sides of the opening in the width direction of the molded portion, and
a portion of the finishing portions is in contact with the lead portion.

17. The coil component of claim 16 , wherein the molded portion has a groove, in which the lead portion is disposed, and
the cover portion is disposed in a portion of the groove to cover the lead portion.

18. A coil component comprising:
a body;
a wound coil embedded in the body;
a lead portion extending from an end of the wound coil and exposed from one surface of the body;
an insulating layer covering the one surface of the body having an opening exposing a portion of the lead portion; and
an external electrode disposed in the opening and connected to the lead portion,
wherein the body comprises a magnetic metallic powder particle covered by an insulating film, and
a portion of the insulating film, which separates the magnetic metallic powder particle from the external electrode and is in contact with the external electrode, and another portion of the insulating film, which is disposed in the body and is spaced apart from the external electrode, include the same material.

19. The coil component of claim 18 , wherein at least a portion of the external electrode extends onto the insulating layer.

20. The coil component of claim 18 , wherein the insulating layer covers each of entirely of other surfaces of the body except the one surface.

21. The coil component of claim 18 , wherein the external electrode is spaced apart from opposing edges of the one surface in a width direction of the coil component.

Assignees

• Samsung Electro Mech

Inventors

• Yeo Jeong Gu
• Lee Young Il
• Li Yong Hui

Classifications

• H01F27/28 Primary

  Coils; Windings; Conductive connections · CPC title

• H01F27/29

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

• H01F27/323

  Insulation between winding turns, between winding layers · CPC title

• H01F41/122

  Insulating between turns or between winding layers · CPC title

• H01F1/344

  Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4 · CPC title