Electronic component

Patent metadata

Field	Value
Publication number	US-10181374-B2
Application number	US-201715654112-A
Country	US
Kind code	B2
Filing date	Jul 19, 2017
Priority date	Aug 10, 2016
Publication date	Jan 15, 2019
Grant date	Jan 15, 2019

Abstract

In an electronic component, a primary coil is electrically connected between a first outer electrode and a fourth outer electrode, a secondary coil is electrically connected between a second outer electrode and a fifth outer electrode, a tertiary coil is electrically connected between a third outer electrode and a sixth outer electrode, and a first inter-layer connection conductor, a second inter-layer connection conductor, and a third inter-layer connection conductor are electrically connected to the end portions at an inner side of a first coil conductor layer, a second coil conductor layer, and a third coil conductor layer, respectively. The first inter-layer connection conductor, the second inter-layer connection conductor, and the third inter-layer connection conductor are not positioned at one side of a second perpendicular direction, compared with a magnetic core, when viewed from a laminating direction.

First claim

What is claimed is:

1. An electronic component comprising:
a main body including a multilayer body in which a plurality of insulating layers including a plurality of first insulating layers are laminated in a laminating direction;
a primary coil including a spiral first coil conductor layer, a secondary coil including a spiral second coil conductor layer, and a tertiary coil including a spiral third coil conductor layer, the first coil conductor layer, the second coil conductor layer, and the third coil conductor layer being provided at different positions in the laminating direction in the multilayer body;
a first outer electrode, a second outer electrode, and a third outer electrode that are provided on the main body and that are arranged in this order from a first side to a second side of a first perpendicular direction perpendicular to the laminating direction;
a fourth outer electrode, a fifth outer electrode, and a sixth outer electrode that are provided on the main body, that are arranged in this order from the first side to the second side of the first perpendicular direction, and that are positioned at a first side of a second perpendicular direction perpendicular to the laminating direction and the first perpendicular direction, compared with the first outer electrode, the second outer electrode, and the third outer electrode;
a magnetic core that passes through the plurality of first insulating layers in the laminating direction so as to pass through the first coil conductor layer, the second coil conductor layer, and the third coil conductor layer in the laminating direction at a center of a certain area surrounded by the first coil conductor layer, the second coil conductor layer, and the third coil conductor layer, when viewed from the laminating direction, the magnetic core having a permeability higher than that of the plurality of insulating layers; and
a first inter-layer connection conductor, a second inter-layer connection conductor, and a third inter-layer connection conductor that pass through at least one of the plurality of first insulating layers in the laminating direction in the certain area, when viewed from the laminating direction,
wherein the primary coil is electrically connected between the first outer electrode and the fourth outer electrode,
wherein the secondary coil is electrically connected between the second outer electrode and the fifth outer electrode,
wherein the tertiary coil is electrically connected between the third outer electrode and the sixth outer electrode,
wherein the first inter-layer connection conductor, the second inter-layer connection conductor, and the third inter-layer connection conductor are electrically connected to an end portion at an inner side of the first coil conductor layer, an end portion at an inner side of the second coil conductor layer, and an end portion at an inner side of the third coil conductor layer, respectively, and
wherein the first inter-layer connection conductor, the second inter-layer connection conductor, and the third inter-layer connection conductor are not positioned at the first side of the second perpendicular direction, compared with the magnetic core, when viewed from the laminating direction.

2. The electronic component according to claim 1 ,
wherein the first inter-layer connection conductor, the second inter-layer connection conductor, and the third inter-layer connection conductor are positioned at a second side of the second perpendicular direction, compared with a portion closest to the second side of the second perpendicular direction in the magnetic core, when viewed from the laminating direction.

3. The electronic component according to claim 1 ,
wherein a length of the certain area in the second perpendicular direction is shorter than a length of the certain area in the first perpendicular direction.

4. The electronic component according to claim 1 ,
wherein at least one of the first inter-layer connection conductor, the second inter-layer connection conductor, and the third inter-layer connection conductor is positioned at a second side of the second perpendicular direction, compared with the magnetic core, when viewed from the laminating direction, and
wherein the remaining inter-layer connection conductors, among the first inter-layer connection conductor, the second inter-layer connection conductor, and the third inter-layer connection conductor, are positioned at the first side or the second side of the first perpendicular direction, compared with the magnetic core, when viewed from the laminating direction.

5. The electronic component according to claim 1 ,
wherein end portions at an outer side of the first coil conductor layer, the second coil conductor layer, and the third coil conductor layer are electrically connected to the fourth outer electrode, the fifth outer electrode, and the sixth outer electrode, respectively, and are positioned at the first side of the second perpendicular direction, compared with a portion closest to the first side of the second perpendicular direction in the magnetic core, when viewed from the laminating direction.

6. The electronic component according to claim 1 ,
wherein the main body further include magnetic substrates laminated at a first side or a second side of the laminating direction of the multilayer body.

7. The electronic component according to claim 1 ,
wherein the primary coil includes spiral n-number, where n is a natural number, primary coil conductor layers that are electrically connected in series to each other,
wherein the secondary coil includes spiral n-number, where n is a natural number, secondary coil conductor layers that are electrically connected in series to each other,
wherein the tertiary coil includes spiral n-number, where n is a natural number, tertiary coil conductor layers that are electrically connected in series to each other,
wherein the n-number primary coil conductor layers include the first coil conductor layer,
wherein the n-number secondary coil conductor layers include the second coil conductor layer,
wherein the n-number tertiary coil conductor layers include the third coil conductor layer,
wherein arrangement of one primary coil conductor layer, one secondary coil conductor layer, and one tertiary coil conductor layer in this order from a first side to a second side of the laminating direction composes one coil conductor layer group, and
wherein the n-number coil conductor layer groups are arranged from the first side to the second side of the laminating direction.

8. The electronic component according to claim 7 ,
wherein a maximum number of n is an odd number.

9. The electronic component according to claim 7 ,
wherein the primary coil further includes a parallel primary coil conductor layer, and
wherein the parallel primary coil conductor layer has substantially the same shape as that of a certain primary coil conductor layer, among the n-number primary coil conductor layers, is electrically connected in parallel to the certain primary coil conductor layer, and is provided on the second side of the laminating direction of the tertiary coil conductor layer, which is provided closest to the second side of the laminating direction.

10. The electronic component according to claim 1 , further comprising:
a first extended portion that connects an end portion at a first side of the primary coil to the first outer electrode, a second extended portion that connects an end portion at a first side of the secondary coil to the second outer electrode, and a third extended portion that connects an end portion at a first side of the tertiary coil to the third outer electrode,
wherein the first extended portion

Assignees

• Murata Manufacturing Co

Inventors

• Katsuta Mizuho
• Ishida Kosuke
• Karino Jun

Classifications

• H01F17/04

  with magnetic core · CPC title

• H01F17/0033

  with the coil helically wound around a magnetic core · CPC title

• H01F27/40

  Structural association with built-in electric component, e.g. fuse · CPC title

• H01F2017/0026

  Multilayer LC-filter · CPC title

• H01F2017/0093

  Common mode choke coil · CPC title