Coil component

Patent metadata

Field	Value
Publication number	US-11581125-B2
Application number	US-201916673328-A
Country	US
Kind code	B2
Filing date	Nov 4, 2019
Priority date	Jul 3, 2019
Publication date	Feb 14, 2023
Grant date	Feb 14, 2023

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 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 the one surface of the molded portion and the cover portion and embedded in the body, and including a coating layer surrounding surfaces 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 surfaces of the winding coil and the cover portion,
wherein the first protective film includes a portion extending, in a direction away from the cover portion, on a side surface of the molded portion connected to the one surface of the molded portion.

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

3. The coil component of claim 1 , wherein the one surface of the molded portion comprises a first region on which the winding coil is disposed and a second region outside of the first region, and the first protective film is disposed along the second region of the one surface of the molded portion and an outer side surface of the winding coil, and an upper surface of the winding coil.

4. The coil component of claim 1 , wherein the first protective film extends to a side surface of the body, and an end surface of the first protective film is disposed on a plane substantially the same as the side surface of the body.

5. The coil component of claim 1 , wherein the first protective film extends from the one surface of the molded portion onto the side surface of the molded portion.

6. The coil component of claim 1 , wherein the body further has a core portion protruding from the one surface of the molded portion to penetrate through the winding coil, and the first protective film is disposed between the core portion and the cover portion.

7. The coil component of claim 1 , further comprising a second protective film disposed between the first protective film and the winding coil and between the winding coil and the molded portion to cover the surfaces of the winding coil.

8. The coil component of claim 7 , wherein the second protective film comprises at least one of alumina (Al 2 O 3 ) or silica (SiO 2 ).

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

10. The coil component of claim 9 , further comprising first and second external electrodes disposed on the other surface of the molded portion to be spaced apart from each other, and connected to the first and second lead-out portions of the winding coil, respectively, and an insulating layer surrounding the surface of the body and having openings exposing the first and second external electrodes.

11. The coil component of claim 1 , wherein the one surface of the molded portion comprises a first region on which the winding coil is disposed and a second region surrounding the first region, and
among the first and second regions, the first protective film is disposed only on the second region.

12. A coil component, comprising:
a molded portion;
a cover portion disposed on one surface of the molded portion, and including magnetic metal powder;
a winding coil disposed between the one surface of the molded portion and the cover portion, and including a coating layer surrounding a surface of each of a plurality of turns; and
one or more protective films disposed along the one surface of the molded portion on which the winding coil is disposed, and disposed between the molded portion and the winding coil, between the molded portion and the cover portion, and between the winding coil and the cover portion,
wherein the number of layers of the protective film disposed between the molded portion and the winding coil is less than the number of layers of the protective film disposed between the winding coil and the cover portion.

13. The coil component of claim 12 , wherein the one or more protective films comprise at least one of alumina (Al 2 O 3 ) or silica (SiO 2 ).

14. The coil component of claim 10 , wherein the first protective film is in contact with one or more of the first and second external electrodes.

15. The coil component of claim 1 , wherein the portion of the first protective film extending on the side surface of the molded portion is spaced apart from the cover portion.

Assignees

• Samsung Electro Mech

Inventors

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

Classifications

• 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

• H01F17/04

  with magnetic core · CPC title

• H01F27/327

  Encapsulating or impregnating (encapsulating coil and core H01F27/022) · CPC title

• H01F27/29 Primary

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

• H01F27/324

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