Coil component

Patent metadata

Field	Value
Publication number	US-12354784-B2
Application number	US-202318095172-A
Country	US
Kind code	B2
Filing date	Jan 10, 2023
Priority date	Jul 3, 2019
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

A coil component includes a body having a molded portion and a cover portion disposed on one surface of the molded portion, and including magnetic metal powder; a winding coil disposed between one surface of the molded portion and the cover portion and embedded in the body, and including a coating layer surrounding a surface of each of a plurality of turns; and a first protective film disposed between the one surface of the molded portion and the cover portion and between at least a portion of the surface of the winding coil and the cover portion.

First claim

What is claimed is:

1. A coil component, comprising:
a body including magnetic metal powder, and having a molded portion and a cover portion with a recess in which a portion of the molded portion is disposed;
a winding coil disposed in the body and wound around a winding axis;
first and second external electrodes connecting with the winding coil; and
a layer disposed between the cover portion and the molded portion,
wherein end portions of the layer extend in a direction of the winding axis to be exposed ona surface of the molded portion, on which the first and second external electrodes are disposed, to contact the first and second external electrodes, respectively.

2. The coil component of claim 1 , wherein one of the first and second external electrodes includes a first layer and a second layer.

3. The coil component of claim 2 , wherein each of the first layer and the second layer includes silver (Ag).

4. The coil component of claim 2 , wherein the first layer includes at least one of copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), chromium (Cr), titanium (Ti), and alloys thereof.

5. The coil component of claim 1 , wherein the magnetic metal powder having a composition comprising at least one of Fe-Si, Fe-Cr-Si, and Fe-Cr-Al.

6. The coil component of claim 5 , wherein the body further includes a core portion disposed in an air core of the winding coil, and the core portion includes an amorphous magnetic metal powder.

7. The coil component of claim 6 , wherein the amorphous metal magnetic powder has an average diameter of at least 0.1 μm and at most 30 μm.

8. The coil component of claim 1 , wherein the winding coil includes a lead-out portion, and the lead-out portion is spaced apart from the layer.

9. The coil component of claim 1 , wherein one of the first and second external electrodes comprises a plurality of layers.

10. The coil component of claim 1 , wherein the layer is disposed along the recess.

11. The coil component of claim 1 , wherein the layer comprises at least one of alumina (Al 2 O 3 ) or silica (SiO 2 ).

12. The coil component of claim 1 , wherein the exposed surface of the layer is disposed on a plane substantially the same as the surface of the body.

13. The coil component of claim 1 , wherein first and second lead-out portions of the winding coil are exposed on the surface of the molded portion to be spaced apart from each other, and
the surface of the molded portion has groove portions corresponding to the first and second lead-out portions of the winding coil.

14. The coil component of claim 13 , wherein the first and second external electrodes are connected to the first and second lead-out portions of the winding coil, respectively, and the coil component further comprises an insulating layer surrounding surfaces of the body and having openings exposing the first and second external electrodes formed therein.

15. A coil component, comprising:
a body including magnetic metal powder, and having a molded portion and a cover portion with a recess in which a portion of the molded portion is disposed;
a winding coil disposed in the body, and including a lead-out portion spaced apart from all outer side surfaces of the cover portion; and
first and second external electrodes connecting with the winding coil,
wherein side surfaces of the molded portion, disposed in the body, extend to a surface of the body on which the first and second external electrodes are disposed, and are connected with the first and second external electrodes, respectively.

16. The coil component of claim 15 , wherein one of the first and second external electrodes includes a first layer and a second layer.

17. The coil component of claim 16 , wherein each of the first layer and the second layer includes silver (Ag).

18. The coil component of claim 16 , wherein the first layer includes at least one of copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), chromium (Cr), titanium (Ti), and alloys thereof.

19. The coil component of claim 15 , wherein the magnetic metal powder having a composition comprising at least one of Fe-Si, Fe-Cr-Si, and Fe-Cr-Al.

20. The coil component of claim 19 , wherein the body further includes a core portion disposed in an air core of the winding coil, and the core portion includes an amorphous magnetic metal powder.

21. The coil component of claim 20 , wherein the amorphous metal magnetic powder has an average diameter of at least 0.1 μm and at most 30 μm.

22. The coil component of claim 15 , wherein one of the first and second external electrodes comprises a plurality of layers.

23. The coil component of claim 15 , wherein the lead-out portion of the winding coil is exposed on the surface of the molded portion, and
the surface of the molded portion has groove portion corresponding to the lead-out portion of the winding coil.

24. The coil component of claim 23 , wherein the coil component further comprises an insulating layer surrounding surfaces of the body and having openings exposing the first and second external electrodes formed therein.

Assignees

• Samsung Electro Mech

Inventors

• Yeo Jeong Gu
• Lee Young Il
• Moon Byeong Cheol

Classifications

• H01F27/255

  made from particles (H01F27/26 takes precedence) · CPC title

• H01F41/0246

  Manufacturing of magnetic circuits by moulding or by pressing powder (magnetic cores made by moulding or by pressing powder H01F27/255; soft magnetic particles H01F1/20, H01F1/36) · CPC title

• H01F27/02

  Casings · CPC title

• H01B7/24

  Devices affording localised protection against mechanical force or pressure · CPC title

• H01F17/04

  with magnetic core · CPC title