Electronic component

Patent metadata

Field	Value
Publication number	US-10748698-B2
Application number	US-201715673988-A
Country	US
Kind code	B2
Filing date	Aug 10, 2017
Priority date	Sep 1, 2016
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

An electronic component having a main body includes a plurality of insulator layers laminated in a lamination direction. A primary coil is disposed in the main body and includes one or more primary coil conductor layers. A secondary coil is disposed in the main body and includes one or more secondary coil conductor layers. A tertiary coil is disposed in the main body and includes one or more tertiary coil conductor layers. The plurality of insulator layers includes a first insulator layer including a portion interposed between the primary coil conductor layer and the secondary coil conductor layer, a second insulator layer including a portion interposed between the secondary coil conductor layer and the tertiary coil conductor layer, and a third insulator layer including a portion interposed between the tertiary coil conductor layer and the primary coil conductor layer.

First claim

The invention claimed is:

1. An electronic component comprising:
a main body including a plurality of insulator layers laminated in a lamination direction;
a primary coil disposed in the main body and including a plurality of primary coil conductor layers;
a secondary coil disposed in the main body and including one or more secondary coil conductor layers; and
a tertiary coil disposed in the main body and including one or more tertiary coil conductor layers, wherein
the plurality of insulator layers includes a first insulator layer including a portion interposed between one of the primary coil conductor layers and one secondary coil conductor layer of the one or more secondary coil conductor layers, a second insulator layer including a portion interposed between the one secondary coil conductor layer and one tertiary coil conductor layer of the one or more tertiary coil conductor layers, and a third insulator layer including a portion interposed between the one tertiary coil conductor layer and another of the primary coil conductor layers, wherein
the electronic component has an insulator layer different in permittivity from the other insulator layers among the first insulator layer, the second insulator layer, and the third insulator layer, and wherein
the permittivity of the third insulator layer is different from the permittivity of the first insulator layer and the permittivity of the second insulator layer.

2. The electronic component according to claim 1 , further comprising
a first external electrode electrically connected to one end of the primary coil,
a second external electrode electrically connected to one end of the secondary coil, and
a third external electrode electrically connected to one end of the tertiary coil, wherein
the first external electrode, the second external electrode, and the third external electrode are arranged in this order along a predetermined direction orthogonal to the lamination direction on one surface of the main body.

3. The electronic component according to claim 2 , further comprising
a fourth external electrode electrically connected to the other end of the primary coil,
a fifth external electrode electrically connected to the other end of the secondary coil, and
a sixth external electrode electrically connected to the other end of the tertiary coil, wherein
the fourth external electrode, the fifth external electrode, and the sixth external electrode are arranged in this order along the predetermined direction on one surface of the main body, and wherein
the primary coil, the secondary coil, and the tertiary coil all have the same circumferential direction from the first external electrode to the fourth external electrode, from the second external electrode to the fifth external electrode, and from the third external electrode to the sixth external electrode, respectively.

4. An electronic component comprising:
a main body including a plurality of insulator layers laminated in a lamination direction;
a primary coil disposed in the main body and including a plurality of primary coil conductor layers;
a secondary coil disposed in the main body and including one or more secondary coil conductor layers; and
a tertiary coil disposed in the main body and including one or more tertiary coil conductor layers, wherein
the plurality of insulator layers includes a first insulator layer including a portion interposed between one of the primary coil conductor layers and one secondary coil conductor layer of the one or more secondary coil conductor layers, a second insulator layer including a portion interposed between the one secondary coil conductor layer and one tertiary coil conductor layer of the one or more tertiary coil conductor layers, and a third insulator layer including a portion interposed between the one tertiary coil conductor layer and another of the primary coil conductor layers, wherein
the electronic component has an insulator layer different in permittivity from the other insulator layers among the first insulator layer, the second insulator layer, and the third insulator layer,
the plurality of primary coil conductor layers include a natural number n of series primary coil conductor layers and one parallel primary coil conductor layer, wherein
the one or more secondary coil conductor layers include n secondary coil conductor layers, wherein
the one or more tertiary coil conductor layers include n tertiary coil conductor layers, wherein
the parallel primary coil conductor layer is electrically connected in parallel to a predetermined series primary coil conductor layer of the n series primary coil conductor layers, and wherein
the third insulator layer includes a fourth insulator layer including a portion interposed between the tertiary coil conductor layer and the parallel primary coil conductor layer.

5. The electronic component according to claim 4 , wherein
the electronic component has n coil conductor layer groups arranged from one side to the other side in the lamination direction, wherein the coil conductor layer groups each have the series primary coil conductor layer, the secondary coil conductor layer, and the tertiary coil conductor layer arranged one by one in this order from one side to the other side in the lamination direction, and wherein
the parallel primary coil conductor layer is disposed on the other side in the laminated direction with respect to the predetermined tertiary coil conductor layer disposed on the farthest other side in the lamination direction.

6. The electronic component according to claim 5 , wherein an interval between the parallel primary coil conductor layer and the predetermined tertiary coil conductor layer in the lamination direction is larger than intervals between the coil conductor layers adjacent to each other in the lamination direction in the n coil conductor layer groups.

7. The electronic component according to claim 5 , wherein the coil conductor layers adjacent to each other in the lamination direction have uniform intervals in the n coil conductor layer groups.

8. The electronic component according to claim 4 , wherein the parallel primary coil conductor layer and the predetermined series primary coil conductor layer have the same shape when viewed in the lamination direction.

9. The electronic component according to claim 8 , wherein the primary coil, the secondary coil, and the tertiary coil have lengths of current paths identical to each other, wherein
when the (n-1) series primary coil conductor layers other than the predetermined series primary coil conductor layer are defined as the other series primary coil conductor layers,
the other series primary coil conductor layers all have the same cross-sectional area, and wherein
a sum of a cross-sectional area of the predetermined series primary coil conductor layer and a cross-sectional area of the parallel primary coil conductor layer are the same as a cross-sectional area of the other series primary coil conductor layers.

10. The electronic component according to claim 8 , wherein the cross- sectional area of the predetermined series primary coil conductor layer and the cross-sectional area of the parallel primary coil conductor layer are the same.

11. The electronic component according to claim 8 , wherein
the n secondary coil conductor layers and the n tertiary coil conductor layers all have a same cross-sectional area, and wherein
the sum of the cross-sectional area of the predetermined series primary coil conductor layer and the cross-sectional area of the parallel primary coil conductor layer is the same as the cross-sectional area of the secondary coil conductor layer and the cross-sectional area o

Assignees

• Murata Manufacturing Co

Inventors

• Okura Ryo
• Katsuta Mizuho
• Ishida Kosuke

Classifications

• H01F2027/2809

  on stacked layers · CPC title

• H01F27/323

  Insulation between winding turns, between winding layers · CPC title

• H01F27/2804 Primary

  Printed windings · CPC title

• H01F2017/0093

  Common mode choke coil · CPC title

• H01F17/0013 Primary

  with stacked layers · CPC title