Electronic component

Patent metadata

Field	Value
Publication number	US-10971310-B2
Application number	US-201916429232-A
Country	US
Kind code	B2
Filing date	Jun 3, 2019
Priority date	Dec 5, 2016
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

An electronic component includes a component base body and first and second outer electrodes covering respective end faces of the component base body. The component base body includes an element main body and a magnetic body portion covering the element main body. The element main body includes a linear inner conductor, a dielectric layer covering the periphery of part of the inner conductor, and a conductor layer formed to cover the dielectric layer.

First claim

The invention claimed is:

1. An electronic component comprising:
a linear inner conductor having first and second end faces;
a dielectric layer on a surface of the inner conductor;
a conductor layer covering the dielectric layer;
a magnetic body portion covering the conductor layer and peripheral portions of the inner conductor;
first and second outer electrodes electrically coupled to the first and second end faces of the inner conductor, respectively; and
a third outer electrode electrically coupled to the conductor layer.

2. The electronic component according to claim 1 , wherein the dielectric layer is an oxide film.

3. The electronic component according to claim 2 , wherein the dielectric film is obtained by oxidizing an outer surface of the inner conductor.

4. The electronic component according to claim 1 , wherein the magnetic body portion is a composite material containing magnetic material powder and thermosetting resin.

5. The electronic component according to claim 1 , wherein:
the inner conductor includes a core portion extending in an axial direction of the inner conductor and a porous portion having numerous pores formed around at least part of the core portion; and
the dielectric layer covers the porous portion.

6. The electronic component according to claim 5 , wherein the conductor layer includes a conductive polymer layer covering the dielectric layer and a conductive resin layer coupled to the third outer electrode.

7. The electronic component according to claim 1 , further comprising an insulating layer covering a periphery of the inner conductor which extends from the conductor layer to an end portion of the inner conductor, the magnetic body portion covering both the conductor layer and the insulating layer.

8. The electronic component according to claim 7 , wherein:
the insulating layer is a first insulating layer;
the end portion of the inner conductor is the first end portion of the inner conductor;
the electronic component further comprises a second insulating layer covering a periphery of the inner conductor which extends from the conductor layer to the second end portion of the inner conductor; and
the magnetic body portion covers the second insulating layer.

9. The electronic component according to claim 1 , wherein the magnetic body portion includes first and second end faces and at least one side face extending between the first and second end faces of the magnetic body portion, the first and second end faces of the inner conductor being exposed at the first and second end faces of the magnetic body portion, respectively.

10. The electronic component according to claim 9 , wherein:
the electronic component has an axis which extends through the first and second outer electrodes;
the first outer electrode includes a first end-face electrode covering the first end face of the magnetic body portion and a first side-face electrode extending from the first end face electrode and covering a portion of at least one of the side faces of the at least one side face the magnetic body portion;
the second outer electrode including a second end-face electrode covering the second end face of the magnetic body portion and a second side-face electrode extending from the second end face electrode and covering a portion of at least one of the at least one side face of the magnetic body portion; and
the dielectric layer does not overlap the first and second side-face electrodes when viewed in a direction orthogonal to the axis of the electronic component.

11. The electronic component according to claim 10 , wherein the at least one side face of the magnetic body portion is a plurality of side faces and each of the first and second side-face electrodes extend from the first and second end face electrodes, respectively, onto respective portions of the each of the plurality of side faces of the first outer electrode.

12. The electronic component according to claim 1 , wherein:
the conductor layer is in contact with the third outer electrode; and
the inner conductor is bent such that the first and second end faces of the inner conductor are positioned at a center of the first and second outer electrodes.

13. The electronic component according to claim 12 , wherein the electronic component has a central axis which extends through the center of the first and second outer electrodes and a center region of the inner conductor is located at a position offset from the central axis.

14. The electronic component according to claim 1 , wherein the third outer electrode is located on an outer portion of the electronic component located between the first and second outer electrodes.

15. The electronic component according to claim 1 , wherein the electronic component is an LC circuit.

16. The electronic component of claim 1 , wherein the electronic component has a central axis that passes through the first and second outer electrodes and does not pass through the third outer electrode, the conductive layer having a central axis that is parallel to the central axis of the electronic component and a center of the conductive layer is closer to first outer electrode than the second outer electrode as measured along the central axis.

Assignees

• Murata Manufacturing Co

Inventors

• Tomohiro Takashi
• Fujimoto Kazumasa
• Nobuta Tomoki

Classifications

• B32B2307/538

  Roughness · CPC title

• H01G4/35 Primary

  Feed-through capacitors or anti-noise capacitors · CPC title

• H03H2001/0042

  Wound, ring or feed-through type capacitor · CPC title

• B32B2255/20

  Inorganic coating · CPC title

• H01G4/224

  Housing; Encapsulation · CPC title