COIL ELECTRONIC COMPONENT

• US 20160351313A1
• Filed: 04/01/2016
• Published: 12/01/2016
• Est. Priority Date: 05/29/2015
• Status: Active Grant

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: JEONG, Dong Jin
• Granted Patent: US 10,483,024 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01F 17/0013 with stacked layers
• CPC Class Codes: H01F 17/04 with magnetic core
• CPC Class Codes: H01F 2003/106 Magnetic circuits using combinations of different magnetic materials
• CPC Class Codes: H01F 2017/048 with encapsulating core, e.g. made of resin and magnetic powder
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H01F 3/10 Composite arrangements of magnetic circuits

Abstract

A coil electronic component including: a substrate; a coil pattern disposed on at least one surface of the substrate; a body filling at least a core area of the coil pattern and containing a magnetic material; and a magnetic flux controller disposed at an outer surface of the body to correspond to the core area and containing a magnetic material which has a permittivity value higher than that of the magnetic material of the body.

Claims

1. A coil electronic component, comprising:

a substrate;

a coil pattern disposed on at least one surface of the substrate;

a body filling at least a core area of the coil pattern and containing a magnetic material; and

a magnetic flux controller disposed at an outer surface of the body and corresponding to the core area, the magnetic flux controller containing a magnetic material which has a permittivity value higher than that of the magnetic material of the body.

2. The coil electronic component of claim 1, wherein the permittivity value of the magnetic material included in the magnetic flux controller is equal to or greater than 30 F/m.

3. The coil electronic component of claim 1, wherein the permittivity value of the magnetic material included in the magnetic flux controller is 1.5 times larger or more than that of the magnetic material included in the body.

4. The coil electronic component of claim 1, wherein when a thickness of the magnetic flux controller is T₁ and a minimum distance from the outer surface of the body, at which the magnetic flux controller is disposed, to a top surface of the coil pattern in a thickness direction of the coil electronic component is T₂, a ratio (T₁/T₂) of T₁ to T₂ is equal to or less than ⅓

.

5. The coil electronic component of claim 1, wherein when viewing the coil electronic component from a side in a thickness-length direction thereof, a length of the magnetic flux controller is shorter than that of the core area.

6. The coil electronic component of claim 5, wherein when viewing the coil electronic component from the side in a width-length direction thereof, a width of the magnetic flux controller is narrower than that of the core area.

7. The coil electronic component of claim 1, wherein the magnetic flux controller extends in a width direction of the coil electronic component from a center toward both sides of the body.

8. The coil electronic component of claim 7, wherein when viewing the coil electronic component in a width-length direction thereof, a length of the magnetic flux controller is shorter than that of the core area.

9. The coil electronic component of claim 1, wherein the magnetic flux controller extends in a length direction of the coil electronic component from a center toward both sides of the body.

10. The coil electronic component of claim 9, wherein when viewing the coil electronic component in a width-length direction thereof, a length of the magnetic flux controller is longer than that of the core area.

11. The coil electronic component of claim 1, further comprising:

external electrodes attached to side surfaces of the body and electrically connected to the coil pattern.

12. The coil electronic component of claim 1, wherein the coil pattern is formed in plural on both surfaces of the substrate, and the plural coil patterns are connected to each other by a via hole.

13. The coil electronic component of claim 1, wherein the magnetic materials are dispersed in a particle form in a thermosetting resin.

14. A coil electronic component, comprising:

a substrate;

at least one coil pattern disposed on upper and lower surfaces of the substrate;

a body filling a core area of the coil pattern and having a first magnetic material, the core area being in a center of the body;

external electrodes attached to side surfaces of the body and electrically connected to the coil patterns; and

a second magnetic material grooved into the body at a center area of an outer surface of the body to correspond to the core area, the second magnetic material having a permittivity value 1.5 times or higher than that of the first magnetic material.

15. The coil electronic component of claim 14, wherein the permittivity value of the second magnetic material is equal to or greater than 30 F/m.

16. The coil electronic component of claim 14, wherein a ratio of a thickness of the center area, into which the second magnetic material is filled, to a minimum distance from the outer surface of the body, at which the second magnetic material is grooved into the body, to a top surface of the coil pattern in a thickness direction of the coil electronic component is equal to or less than ⅓

.

17. The coil electronic component of claim 14, wherein when viewing the coil electronic component from a side in a thickness-length direction thereof, a length of the center area, into which the second magnetic material is filled, is shorter than that of the core area, and

when viewing the coil electronic component from a side in a width-length direction thereof, a width of the center area, into which the second magnetic material is filled, is narrower than that of the core area.

18. The coil electronic component of claim 14, wherein when the second magnetic material extends in a width direction of the coil electronic component from a center toward both sides of the body, a length of the center area, into which the second magnetic material is filled, is shorter than that of the core area when viewing the coil electronic component in a width-length direction thereof.

19. The coil electronic component of claim 14, when the second magnetic material extends in a length direction of the coil electronic component from a center toward both sides of the body, a length of the center area, into which the second magnetic material is filled, is longer than that of the core area viewing the coil electronic component in a width-length direction thereof.

20. The coil electronic component of claim 14, wherein the first and second magnetic materials have a diameter of 0.1 μ

m to 20 μ

m and is dispersed in a particle form in a thermosetting resin.