Coil component

Patent metadata

Field	Value
Publication number	US-10867744-B2
Application number	US-201815948494-A
Country	US
Kind code	B2
Filing date	Apr 9, 2018
Priority date	Apr 19, 2017
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A coil component includes a magnetic portion that includes metal particles and a resin material, a coil conductor embedded in the magnetic portion, and outer electrodes electrically connected to the coil conductor and disposed on the bottom surface of the coil component. The magnetic portion includes a magnetic base having a protrusion portion and a magnetic outer coating. The coil conductor is disposed on the magnetic base such that the protrusion portion is located in a core portion of the coil conductor. The magnetic outer coating is disposed so as to cover the coil conductor, and the height of the edge portion of the upper surface of the magnetic base is more than the height at the position at which the edge of the protrusion portion is located.

First claim

What is claimed is:

1. A coil component comprising:
a magnetic portion that includes metal particles and a resin material, the magnetic portion comprising a magnetic base having an upper surface, a protrusion portion extending from the upper surface in a protrusion direction and a magnetic outer coating, and the upper surface of the magnetic base being elevated from an edge of the protrusion portion to an edge portion of the magnetic base such that a height in the protrusion direction of the edge portion of the upper surface of the magnetic base is more than a height in the protrusion direction at a position at which the edge of the protrusion portion is located;
a coil conductor embedded in the magnetic portion and disposed on the magnetic base such that the protrusion portion is located in a core portion of the coil conductor, and the magnetic outer coating is disposed so as to cover the coil conductor; and
outer electrodes electrically connected to the coil conductor and disposed on the bottom surface of the coil component.

2. The coil component according to claim 1 , wherein a difference between the height at the position at which the edge of the protrusion portion is located and the height of the edge portion of the upper surface of the magnetic base is from 0.10 mm to 0.30 mm.

3. The coil component according to claim 1 , wherein a difference between the height at the position at which the edge of the protrusion portion is located and the height of the edge portion of the upper surface of the magnetic base is from 0.15 mm to 0.25 mm.

4. The coil component according to claim 1 , wherein at least one side surface of the winding portion of the coil conductor is in a shape along the upper surface of the magnetic base.

5. The coil component according to claim 1 , wherein:
a bottom surface of the magnetic base includes grooves, and
end portions of the coil conductor that extend into the grooves are disposed in the grooves.

6. The coil component according to claim 1 , wherein end portions of the coil conductor extend to a bottom surface of the magnetic base via the side surface, and extension portions, which are located on the side surface, of the coil conductor are covered with the magnetic outer coating.

7. The coil component according to claim 2 , wherein a difference between the height at the position at which the edge of the protrusion portion is located and the height of the edge portion of the upper surface of the magnetic base is from 0.15 mm to 0.25 mm.

8. The coil component according to claim 2 , wherein at least one side surface of the winding portion of the coil conductor is in a shape along the upper surface of the magnetic base.

9. The coil component according to claim 3 , wherein at least one side surface of the winding portion of the coil conductor is in a shape along the upper surface of the magnetic base.

10. The coil component according to claim 7 , wherein at least one side surface of the winding portion of the coil conductor is in a shape along the upper surface of the magnetic base.

11. The coil component according to claim 2 , wherein:
a bottom surface of the magnetic base includes grooves, and
end portions of the coil conductor that extend into the grooves are disposed in the grooves.

12. The coil component according to claim 3 , wherein:
a bottom surface of the magnetic base includes grooves, and
end portions of the coil conductor that extend into the grooves are disposed in the grooves.

13. The coil component according to claim 4 , wherein:
a bottom surface of the magnetic base includes grooves, and
end portions of the coil conductor that extend into the grooves are disposed in the grooves.

14. The coil component according to claim 7 , wherein:
a bottom surface of the magnetic base includes grooves, and
end portions of the coil conductor that extend into the grooves are disposed in the grooves.

15. The coil component according to claim 8 , wherein:
a bottom surface of the magnetic base includes grooves, and
end portions of the coil conductor that extend into the grooves are disposed in the grooves.

16. The coil component according to claim 2 , wherein end portions of the coil conductor extend to a bottom surface of the magnetic base via the side surface, and extension portions, which are located on the side surface, of the coil conductor are covered with the magnetic outer coating.

17. The coil component according to claim 3 , wherein end portions of the coil conductor extend to a bottom surface of the magnetic base via the side surface, and extension portions, which are located on the side surface, of the coil conductor are covered with the magnetic outer coating.

18. The coil component according to claim 4 , wherein end portions of the coil conductor extend to a bottom surface of the magnetic base via the side surface, and extension portions, which are located on the side surface, of the coil conductor are covered with the magnetic outer coating.

19. The coil component according to claim 5 , wherein end portions of the coil conductor extend to the bottom surface of the magnetic base via the side surface, and extension portions, which are located on the side surface, of the coil conductor are covered with the magnetic outer coating.

20. The coil component according to claim 7 , wherein end portions of the coil conductor extend to a bottom surface of the magnetic base via the side surface, and extension portions, which are located on the side surface, of the coil conductor are covered with the magnetic outer coating.

Assignees

• Murata Manufacturing Co

Inventors

• SHINOHARA Gota
• Ishida Takuya

Classifications

• H01F27/255 Primary

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

• H01F27/2828

  Construction of conductive connections, of leads · CPC title

• H01F2017/048

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

• H01F27/2823

  Wires (H01F27/2866 takes precedence) · CPC title

• H01F17/04 Primary

  with magnetic core · CPC title