Electronic component

Patent metadata

Field	Value
Publication number	US-10476466-B2
Application number	US-201615297382-A
Country	US
Kind code	B2
Filing date	Oct 19, 2016
Priority date	Nov 4, 2015
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

An electronic component includes a multilayer body constituted by insulator layers that are laminated in a laminating direction, a primary coil including one or more primary coil conductor layers, a secondary coil including one or more secondary coil conductor layers, and a tertiary coil including one or more tertiary coil conductor layers. The primary coil conductor layers, the secondary coil conductor layers, and the tertiary coil conductor layers are arrayed in the laminating direction. The primary coil, the secondary coil, and tertiary coil constitute a common mode filter, and intervals between two among the one or more primary coil conductor layers, the one or more secondary coil conductor layers, and the one or more tertiary coil conductor layers, every two of those being adjacent to each other in the laminating direction, are not even.

First claim

What is claimed is:

1. An electronic component comprising:
a multilayer body constituted by insulator layers that are laminated in a laminating direction;
a primary coil including one or more primary coil conductor layers and at least one parallel coil conductor layer, each disposed on one of the insulator layers;
a secondary coil including one or more secondary coil conductor layers each disposed on one of the insulator layers; and
a tertiary coil including one or more tertiary coil conductor layers each disposed on one of the insulator layers,
wherein the primary coil conductor layers, the secondary coil conductor layers, the tertiary coil conductor layers, and at least one parallel coil conductor layer are arrayed in the laminating direction such that every two coil conductor layers are adjacent to each other with an interval therebetween in the laminating direction,
the primary coil, the secondary coil, and tertiary coil constitute a common mode filter, and
an interval between the at least one parallel coil conductor layer and the tertiary coil layers is different from the respective other intervals.

2. The electronic component according to claim 1 , wherein n is a natural number,
the one or more primary coil conductor layers include n primary coil conductor layers and a parallel primary coil conductor layer disposed on one of the insulator layers,
the one or more secondary coil conductor layers include n secondary coil conductor layers,
the one or more tertiary coil conductor layers include n tertiary coil conductor layers,
current paths of the primary coil, the secondary coil, and the tertiary coil are substantially equal to one another in length,
respective ones of the primary coil conductor layers, the secondary coil conductor layers, and the tertiary coil conductor layers are arrayed in a mentioned order from one side toward the other side in the laminating direction and constitute a coil conductor layer group,
n coil conductor layer groups are arrayed from the one side toward the other side in the laminating direction,
the parallel primary coil conductor layer is electrically connected to a predetermined primary coil conductor layer in parallel, has a substantially same shape as the predetermined primary coil conductor layer in a plan view which is a one viewed from the laminating direction, and is disposed on the other side in the laminating direction relative to a predetermined tertiary coil conductor layer which is the tertiary coil conductor layer disposed at a farthest position on the other side in the laminating direction, and
an interval in the laminating direction between the parallel primary coil conductor layer and the predetermined tertiary coil conductor layer is larger than respective intervals between two of the primary coil conductor layers, the secondary coil conductor layers, and the tertiary coil conductor layers.

3. The electronic component according to claim 2 , wherein n is a natural number of two or more, a total of a sectional area of the predetermined primary coil conductor layer and a sectional area of the parallel primary coil conductor layer is substantially equal to a sectional area of each of the primary coil conductor layers other than the predetermined primary coil conductor layer.

4. The electronic component according to claim 2 , wherein the sectional area of the predetermined primary coil conductor layer and the sectional area of the parallel primary coil conductor layer are substantially equal to each other.

5. The electronic component according to claim 2 , wherein the total of the sectional area of the predetermined primary coil conductor layer and the sectional area of the parallel primary coil conductor layer is substantially equal to a sectional area of each of the secondary coil conductor layers, and is substantially equal to a sectional area of each of the tertiary coil conductor layers.

6. The electronic component according to claim 2 , wherein a volume of the primary coil, a volume of the secondary coil, and a volume of the tertiary coil are substantially equal to one another.

7. The electronic component according to claim 2 , wherein the respective intervals between two of the primary coil conductor layers, the secondary coil conductor layers, and the tertiary coil conductor layers are substantially even.

8. The electronic component according to claim 2 , wherein each of the primary coil conductor layers has a substantially spiral shape in the plan view, and
the electronic component further comprises:
a first outer electrode; and
a first lead-out conductor layer not having a substantially spiral shape in the plan view,
wherein the primary coil conductor layers include an end primary coil conductor layer, and
the first lead-out conductor layer relays connection between an inner end portion of the end primary coil conductor layer and the first outer electrode, and is disposed between the parallel primary coil conductor layer and the predetermined tertiary coil conductor layer.

9. The electronic component according to claim 8 , wherein each of the secondary coil conductor layers and the tertiary coil conductor layers has a substantially spiral shape in the plan view, and
the electronic component further comprising:
a second outer electrode;
a third outer electrode;
a second lead-out conductor layer not having a substantially spiral shape in the plan view; and
a third lead-out conductor layer not having a substantially spiral shape in the plan view, wherein
the secondary coil conductor layers include an end secondary coil conductor layer,
the tertiary coil conductor layers include an end tertiary coil conductor layer,
the second lead-out conductor layer relays connection between an inner end portion of the end secondary coil conductor layer and the second outer electrode, and is disposed between the parallel primary coil conductor layer and the predetermined tertiary coil conductor layer,
the third lead-out conductor layer relays connection between an inner end portion of the end tertiary coil conductor layer and the third outer electrode, and is disposed between the parallel primary coil conductor layer and the predetermined tertiary coil conductor layer, and
the first outer electrode, the second outer electrode, and the third outer electrode are arrayed in a mentioned order in a predetermined direction that is perpendicular to the laminating direction.

Assignees

• Murata Manufacturing Co

Inventors

• Karino Jun
• Katsuta Mizuho
• Ishida Kosuke

Classifications

• H01F27/292

  Surface mounted devices · CPC title

• H03H7/38 Primary

  Impedance-matching networks · CPC title

• H03H2001/0092

  Inductor filters, i.e. inductors whose parasitic capacitance is of relevance to consider it as filter · CPC title

• H01F27/2804 Primary

  Printed windings · CPC title

• H01F17/0013

  with stacked layers · CPC title