Inductor component and method for manufacturing inductor component

Patent metadata

Field	Value
Publication number	US-12249454-B2
Application number	US-202117330282-A
Country	US
Kind code	B2
Filing date	May 25, 2021
Priority date	Jun 1, 2020
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

An inductor component includes a main body including a magnetic layer, an inductor wiring disposed in the main body, and vertical wirings each of which is connected to the inductor wiring and each of which extends from a portion in which the vertical wiring and the inductor wiring are connected to each other to a first main surface of the main body. A second main surface of the main body is located on the side of the inductor wiring that is opposite to the side of the inductor wiring on which the first main surface is located. The first main surface is covered with a first outer layer having an insulating property, and the second main surface is covered with a second outer surface having an insulating property. The first outer layer and the second outer layer each contain a colorant.

First claim

What is claimed is:

1. An inductor component comprising:
a main body that includes a magnetic layer and that has a first main surface and a second main surface;
an inductor wiring that is disposed in the main body; and
a vertical wiring that is connected to the inductor wiring and that extends from a portion in which the vertical wiring and the inductor wiring are connected to each other to the first main surface,
wherein the second main surface is located opposite to the first main surface with the inductor wiring interposed therebetween,
the first main surface is covered with a first outer layer having an insulating property,
the second main surface is covered with a second outer layer having an insulating property,
the first outer layer and the second outer layer each contain a colorant, and
the first outer layer has a color different from a color of the second outer layer.

2. The inductor component according to claim 1 , wherein
among side surfaces of the main body, only the first main surface is covered with the first outer layer.

3. The inductor component according to claim 1 , wherein
among side surfaces of the main body, only the second main surface is covered with the second outer layer.

4. The inductor component according to claim 1 , wherein
at least one of the first outer layer and the second outer layer contains an inorganic filler.

5. The inductor component according to claim 1 , wherein
a gap between the first main surface and the second main surface is 0.3 mm or less,
the magnetic layer contains, as magnetic powder, at least one of iron and an alloy containing iron, and
an average particle diameter of the magnetic powder is from 1 μm to 5 μm.

6. The inductor component according to claim 1 , wherein
a thickness of the first outer layer is from 3 μm to 10 μm.

7. The inductor component according to claim 1 , wherein
the second outer layer is thinner than the first outer layer.

8. The inductor component according to claim 1 , wherein
the second outer layer contains a black colorant.

9. The inductor component according to claim 1 , further comprising:
an external terminal that is connected to the vertical wiring and exposed at the first outer layer,
wherein the external terminal is in contact with both the main body and the first outer layer.

10. The inductor component according to claim 9 , wherein
the external terminal is a multilayer body including a plurality of layers laminated together, and
the multilayer body includes a layer in which a percentage of copper is 99 wt % or less and a percentage of nickel is 0.1 wt % or greater.

11. The inductor component according to claim 9 , wherein
the external terminal is a multilayer body including a plurality of layers laminated together, and
the multilayer body includes a layer containing a substitutional catalyst.

12. The inductor component according to claim 1 , wherein
the colorant contained in the first outer layer is different from the colorant contained in the second outer layer.

13. An inductor component comprising:
a main body that includes a magnetic layer and that has a first main surface and a second main surface;
an inductor wiring that is disposed in the main body; and
a vertical wiring that is connected to the inductor wiring and that extends from a portion in which the vertical wiring and the inductor wiring are connected to each other to the first main surface,
wherein the second main surface is located opposite to the first main surface with the inductor wiring interposed therebetween,
the first main surface is covered with a first outer layer having an insulating property,
the second main surface is covered with a second outer layer having an insulating property,
the first outer layer and the second outer layer each contain a colorant, and
the colorant contained in the first outer layer is different from the colorant contained in the second outer layer.

14. The inductor component according to claim 13 , wherein
among side surfaces of the main body, only the first main surface is covered with the first outer layer.

15. The inductor component according to claim 13 , wherein
among side surfaces of the main body, only the second main surface is covered with the second outer layer.

16. An inductor component comprising:
a main body that includes a magnetic layer and that has a first main surface and a second main surface;
an inductor wiring that is disposed in the main body; and
a vertical wiring that is connected to the inductor wiring and that extends from a portion in which the vertical wiring and the inductor wiring are connected to each other to the first main surface,
wherein the second main surface is located opposite to the first main surface with the inductor wiring interposed therebetween,
the first main surface is covered with a first outer layer having an insulating property,
the second main surface is covered with a second outer layer having an insulating property,
the first outer layer and the second outer layer each contain a colorant, and
a shielding property of the second outer layer is higher than a shielding property of the first outer layer.

17. An inductor component comprising:
a main body that includes a magnetic layer and that has a first main surface and a second main surface;
an inductor wiring that is disposed in the main body; and
a vertical wiring that is connected to the inductor wiring and that extends from a portion in which the vertical wiring and the inductor wiring are connected to each other to the first main surface,
wherein the second main surface is located opposite to the first main surface with the inductor wiring interposed therebetween,
the first main surface is covered with a first outer layer having an insulating property,
the second main surface is covered with a second outer layer having an insulating property,
the first outer layer and the second outer layer each contain a colorant, and
a content of the colorant per unit volume in the second outer layer is larger than a content of the colorant per unit volume in the first outer layer.

18. An inductor component comprising:
a main body that includes a magnetic layer and that has a first main surface and a second main surface;
an inductor wiring that is disposed in the main body; and
a vertical wiring that is connected to the inductor wiring and that extends from a portion in which the vertical wiring and the inductor wiring are connected to each other to the first main surface,
wherein the second main surface is located opposite to the first main surface with the inductor wiring interposed therebetween,
the first main surface is covered with a first outer layer having an insulating property,
the second main surface is covered with a second outer layer having an insulating property,
the first outer layer and the second outer layer each contain a colorant, and
at least one of the first outer layer and the second outer layer has a surface roughness of 2 μm or less.

Assignees

• Murata Manufacturing Co

Inventors

• Imaeda Hiroki
• Yoshioka Yoshimasa
• Yamamoto Kazuyuki

Classifications

• H01F27/292 Primary

  Surface mounted devices · CPC title

• H01F27/324

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

• H01F41/046

  structurally combined with ferromagnetic material · CPC title

• H01F27/2823

  Wires (H01F27/2866 takes precedence) · CPC title

• H05K1/16

  incorporating printed electric components, e.g. printed resistors, capacitors or inductors · CPC title