Coil electronic component

Patent metadata

Field	Value
Publication number	US-11211194-B2
Application number	US-201816008847-A
Country	US
Kind code	B2
Filing date	Jun 14, 2018
Priority date	Oct 16, 2017
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

A coil electronic component includes a body having a coil portion embedded therein, and external electrodes connected to the coil portion, wherein the body includes a plurality of magnetic portions having a form in which magnetic particles are dispersed in an insulator and one or more insulating portions disposed between the plurality of magnetic portions.

First claim

What is claimed is:

1. A coil electronic component comprising:
a body having a coil portion embedded therein,
the coil portion having a magnetic core; and
external electrodes connected to the coil portion,
wherein the body includes a plurality of magnetic portions having a form in which magnetic particles are dispersed in an insulator and an insulating portion disposed between the plurality of magnetic portions, and between the coil portion and the plurality of magnetic portions,
wherein the insulating portion is depressed toward the magnetic core.

2. The coil electronic component of claim 1 , wherein the insulating portion is coated on one surface of the magnetic portion.

3. The coil electronic component of claim 2 , wherein the insulating portion is an atomic layer deposition (ALD) layer.

4. The coil electronic component of claim 1 , wherein the insulating portion comprises alumina.

5. The coil electronic component of claim 1 , wherein the insulating portion has a thickness of 100 nm or less.

6. The coil electronic component of claim 1 , wherein the coil portion has a magnetic core formed in a center thereof.

7. The coil electronic component of claim 1 , wherein the insulating portion is in contact with coil patterns included in the coil portion.

8. The coil electronic component of claim 1 , wherein the coil portion includes coating layers formed on surfaces of coil patterns included in the coil portion, and the insulating portion is in contact with the coating layers.

9. The coil electronic component of claim 1 , wherein the insulator is an insulating resin.

10. The coil electronic component of claim 1 , wherein the magnetic particle is formed of an Fe-based alloy.

11. A coil electronic component, comprising:
a body comprising magnetic portions and insulating portions disposed between adjacent magnetic portions, the magnetic portions comprising magnetic particles dispersed in an insulator;
a coil portion embedded in the body; and
external electrodes connected to the coil portion and provided on an external surface of the body,
wherein the coil portion has a magnetic core at a center thereof and the insulating portions are depressed toward the magnetic core.

12. The coil electronic component of claim 11 , wherein the insulating portion has a thickness of less than 100 nm and is disposed conformally on a corresponding magnetic portion.

13. The coil electronic component of claim 11 , wherein the insulating portion comprises a ceramic.

14. The coil electronic component of claim 11 , wherein the insulator comprises a resin.

15. The coil electronic component of claim 11 , wherein the magnetic particles comprise a Fe-based alloy.

16. The coil electronic component of claim 11 , wherein the external electrodes comprise a conductive paste disposed on an external surface of the body.

17. A coil electronic component, comprising:
a body comprising a plurality of laminates,
each laminate comprising a magnetic layer and an insulating layer disposed on the magnetic layer, the laminates being disposed such that the insulating layer and the magnetic layer are alternately stacked;
a coil portion embedded in the body and having a magnetic core; and
external electrodes disposed on external surfaces of the body and electrically in contact with corresponding ends of the coil portion,
wherein the insulating layer of the laminate comprises a ceramic conformally formed on the corresponding magnetic layer,
wherein the insulating layer is depressed toward the magnetic core.

18. The coil electronic component of claim 17 , wherein magnetic layer of the laminate comprises magnetic particles dispersed in an insulating material.

19. The coil electronic component of claim 17 , wherein the insulating layer of the laminate has a thickness of less than 100 nm.

Assignees

• Samsung Electro Mech

Inventors

• Kwon Sang Kyun
• Ryu Han Wool
• Lee Young Il

Classifications

• H01F27/324

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

• H01F17/04

  with magnetic core · CPC title

• H01F2017/048

  with encapsulating core, e.g. made of resin and magnetic powder · CPC title

• H01F27/292

  Surface mounted devices · CPC title

• H01F17/0013 Primary

  with stacked layers · CPC title