Inductor component
An inductor component includes a multilayer body including a magnetic layer and a spiral wiring line disposed in the multilayer body. The magnetic layer includes a base resin, a metal magnetic powder, and a non-magnetic powder. The base resin has voids, and the metal magnetic powder and the non-magnetic powder are contained in the base resin. There is a particle of the metal magnetic powder that is in contact with at least one of the voids and with the non-magnetic powder.
1. An inductor component comprising:
a multilayer body including a magnetic layer; and
an inductor wiring line disposed in the multilayer body,
wherein
the magnetic layer includes a base resin, a metal magnetic powder, and a non-magnetic powder, the base resin having voids, and the metal magnetic powder and the non-magnetic powder being contained in the base resin, and
the metal magnetic powder has a particle that is in contact with at least one of the voids and with the non-magnetic powder.
2. The inductor component according to claim 1 , wherein
the non-magnetic powder includes silica.
3. The inductor component according to claim 1 , wherein
particles of the metal magnetic powder and particles of the non-magnetic powder each have a spherical shape.
4. The inductor component according to claim 1 , wherein
the metal magnetic powder contains iron.
5. The inductor component according to claim 4 , wherein
the metal magnetic powder contains from 1 wt % to 5 wt % of chrome.
6. The inductor component according to claim 1 , wherein
the metal magnetic powder has an average particle diameter of from 1 μm to 5 μm, and
the non-magnetic powder has an average particle diameter that is smaller than the average particle diameter of the metal magnetic powder.
7. The inductor component according to claim 1 , wherein
a particle diameter of the non-magnetic powder that is in contact with the metal magnetic powder is one-third or less of a particle diameter of the metal magnetic powder, which is in contact with the non-magnetic powder.
8. The inductor component according to claim 1 , wherein
in a lamination direction of the multilayer body, there are a plurality of particles of the metal magnetic powder that are each in contact with at least one of the voids and with the non-magnetic powder.
9. The inductor component according to claim 1 , wherein
the magnetic layer further includes ferrite powder.
10. The inductor component according to claim 1 , wherein
the base resin contains at least one of an epoxy-based resin and an acrylic resin.
11. The inductor component according to claim 1 , wherein
a cross-sectional shape of at least one of the voids that is in contact with the metal magnetic powder has different lengths in two orthogonal directions.
12. The inductor component according to claim 1 , wherein
a diameter of at least one of the voids that is in contact with the metal magnetic powder is smaller than a diameter of the metal magnetic powder that is in contact with the void.
13. The inductor component according to claim 1 , wherein
the multilayer body includes a non-magnetic insulator that is in contact with the inductor wiring line, and
the inductor component further includes a vertical wiring line that extends through the multilayer body in the lamination direction of the multilayer body from the inductor wiring line to a surface of the multilayer body.
14. The inductor component according to claim 13 , wherein
at least one of the voids that is in contact with the metal magnetic powder is also in contact with the vertical wiring line.
15. The inductor component according to claim 13 , further comprising:
an external terminal formed on a main surface of the multilayer body,
wherein the external terminal is disposed on an exposed surface of the vertical wiring line exposed at the main surface of the multilayer body.
16. The inductor component according to claim 13 , wherein
the insulator includes at least one of an epoxy-based resin, an acrylic resin, a phenolic resin, a polyimide-based resin, and a liquid crystal polymer-based resin and also includes at least one of resins contained in the base resin.
17. The inductor component according to claim 6 , wherein
the inductor component has a thickness of 0.5 mm or smaller.
18. The inductor component according to claim 1 , wherein
the inductor wiring line includes a plurality of inductor wiring layers laminated together.
19. The inductor component according to claim 1 , further comprising:
a plurality of the inductor wiring lines arranged on the same plane.
20. The inductor component according to claim 2 , wherein
particles of the metal magnetic powder and particles of the non-magnetic powder each have a spherical shape.