Coil component

Patent metadata

Field	Value
Publication number	US-10861641-B2
Application number	US-201815948107-A
Country	US
Kind code	B2
Filing date	Apr 9, 2018
Priority date	Apr 19, 2017
Publication date	Dec 8, 2020
Grant date	Dec 8, 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 coil conductor is disposed such that the central axis is arranged in the height direction of the coil component, and a winding constituting the outermost layer of a winding portion of the coil conductor is located at a position higher than the position of a winding constituting the innermost layer.

First claim

What is claimed is:

1. A coil component comprising:
a magnetic portion that includes metal particles a resin material and a magnetic base having an upper surface;
a coil conductor embedded in the magnetic portion and having a central axis, the coil conductor being disposed on the upper surface such that the central axis is arranged along a height direction of the coil component, and the upper surface of the magnetic base is inclined toward an outer edge of the magnetic base which causes an outermost winding of the coil conductor to be located higher than an innermost winding of the coil conductor; and
outer electrodes electrically connected to the coil conductor and disposed on a bottom surface of the magnetic portion.

2. The coil component according to claim 1 , wherein a difference in the height between the innermost winding and the outermost winding is from 0.02 mm to 0.10 mm.

3. The coil component according to claim 1 , wherein a difference in the height between the innermost winding and the outermost winding is from 0.02 mm to 0.10 mm.

4. The coil component according to claim 1 , wherein the coil conductor is composed of a rectangular wire.

5. The coil component according to claim 4 , wherein the thickness of the rectangular wire is from 0.02 to 0.14 mm.

6. The coil component according to claim 4 , wherein the thickness of the rectangular wire is from 0.02 mm to 0.09 mm.

7. The coil component according to claim 4 , wherein the ratio of the thickness to the width of the rectangular wire is from 0.2 to 0.7.

8. The coil component according to claim 4 , wherein the ratio of the thickness to the width of the rectangular wire is from 0.2 to 0.4.

9. The coil component according to claim 1 , wherein the thickness of the coil component is 0.8 mm or less.

10. The coil component according to claim 1 , wherein the thickness of the coil component is 0.7 mm or less.

11. The coil component according to claim 1 , wherein:
the magnetic base has 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, and
the magnetic outer coating is disposed so as to cover the coil conductor.

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

13. The coil component according to claim 2 , wherein a difference in the height between the innermost winding and the outermost winding is from 0.02 mm to 0.10 mm.

14. The coil component according to claim 2 , wherein the coil conductor is composed of a rectangular wire.

15. The coil component according to claim 3 , wherein the coil conductor is composed of a rectangular wire.

16. The coil component according to claim 5 , wherein the thickness of the rectangular wire is from 0.02 mm to 0.09 mm.

17. The coil component according to claim 5 , wherein the ratio of the thickness to the width of the rectangular wire is from 0.2 to 0.7.

18. The coil component according to claim 6 , wherein the ratio of the thickness to the width of the rectangular wire is from 0.2 to 0.7.

19. The coil component according to claim 5 , wherein the ratio of the thickness to the width of the rectangular wire is from 0.2 to 0.4.

20. The coil component according to claim 1 , wherein
the magnetic base has a protrusion portion; and
the upper surface of the base portion is elevated from an edge of the protrusion portion to an edge of the base portion, which causes the outermost winding of the coil conductor to be higher than an innermost winding of the coil conductor.

Assignees

• Murata Manufacturing Co

Inventors

• SHINOHARA Gota
• Ishida Takuya

Classifications

• H01F27/2823 Primary

  Wires (H01F27/2866 takes precedence) · CPC title

• H01F27/30

  Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support · CPC title

• H01F27/29

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

• H01F27/292

  Surface mounted devices · CPC title

• H01F27/327 Primary

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