Coil component

Patent metadata

Field	Value
Publication number	US-2018358174-A1
Application number	US-201816004759-A
Country	US
Kind code	A1
Filing date	Jun 11, 2018
Priority date	Jun 13, 2017
Publication date	Dec 13, 2018
Grant date	—

Abstract

Disclosed herein is a coil component that includes first and second coil parts each spirally wound in a plurality of turns in directions opposite to each other. An innermost turn of the first coil part is radially divided into first and second conductor parts by a spiral slit, and at least an innermost turn of the second coil part is radially divided into third and fourth conductor parts by a spiral slit. The first conductor part is positioned radially inward of the second conductor part, and the third conductor part is positioned radially inward of the fourth conductor part. The inner peripheral end of the first conductor part is connected to the inner peripheral end of the fourth conductor part, and the inner peripheral end of the second conductor part is connected to the inner peripheral end of the third conductor part.

First claim

What is claimed is:

1 . A coil component comprising:
a first coil part spirally wound in a plurality of turns; and a second coil part laid so as to overlap the first coil part and spirally wound in a plurality of turns in a direction opposite to a winding direction of the first coil part, wherein at least an innermost turn of the first coil part is radially divided into first and second conductor parts by a spiral slit, and at least an innermost turn of the second coil part is radially divided into third and fourth conductor parts by a spiral slit, wherein the first conductor part is positioned radially inward of the second conductor part, and the third conductor part is positioned radially inward of the fourth conductor part, and wherein the inner peripheral end of the first conductor part is connected to the inner peripheral end of the fourth conductor part, and the inner peripheral end of the second conductor part is connected to the inner peripheral end of the third conductor part.

2 . The coil component as claimed in claim 1 , wherein each of the turns of the first coil part is divided into the first and second conductor parts by the slit, and each of the turns of the second coil part is divided into the third and fourth conductor parts by the slit.

3 . The coil component as claimed in claim 1 ,
wherein each of the first to fourth conductor parts has a circumferential area in which a radial position is not shifted and a transition area in which the radial position is shifted, and wherein the circumferential area of the first conductor part and the circumferential area of the third conductor part overlap each other, and the circumferential area of the second conductor part and the circumferential area of the fourth conductor part overlap each other.

4 . The coil component as claimed in claim 1 , further comprising an insulating film,
wherein the first coil part is formed on one surface of the insulating film, and the second coil part is formed on other surface of the insulating film, wherein the inner peripheral end of the first conductor part and the inner peripheral end of the fourth conductor part is connected to each other through a first through hole conductor formed so as to penetrate the insulating film, and wherein the inner peripheral end of the second conductor part and the inner peripheral end of the third conductor part is connected to each other through a second through hole conductor formed so as to penetrate the insulating film.

5 . The coil component as claimed in claim 4 , further comprising a magnetic member having a protruding part,
wherein the insulating film have a through hole formed at a portion corresponding to an inner diameter area of each of the first and second coil parts, and wherein the protruding part of the magnetic member is inserted through the through hole of the insulating film.

6 . The coil component as claimed in claim 1 ,
wherein a plurality of sets each including the first coil part and second coil part are provided, and wherein the sets are connected in parallel.

7 . A coil component comprising:
a first coil formed on a first plane, the first coil including first and second coil conductors extending in a circumferential direction, the second coil conductor being larger in a diameter than the first coil conductor; a second coil formed on a second plane, the second coil including third and fourth coil conductors extending in a circumferential direction, the fourth coil conductor being larger in a diameter than the third coil conductor; a first connection conductor connected between the first and fourth coil conductors; and a second connection conductor connected between the second and third coil conductors.

8 . The coil component as claimed in claim 7 ,
wherein the first coil has a first electrode electrically connected in common to the first and second coil conductors, and wherein the second coil has a second electrode electrically connected in common to the third and fourth coil conductors.

9 . The coil component as claimed in claim 8 ,
wherein the first electrode is positioned at an outermost end of the first coil, and wherein the second electrode is positioned at an outermost end of the second coil.

10 . The coil component as claimed in claim 9 , wherein the first and second connection conductors are positioned at innermost end of the first and second coils.

11 . The coil component as claimed in claim 7 , wherein the first and second planes are parallel with each other.

12 . The coil component as claimed in claim 11 , further comprising a substrate having first and second surfaces opposite to each other,
wherein the first surface constitutes the first plane, and the second surface constitutes the second plane.

13 . The coil component as claimed in claim 12 , wherein the first and second connection conductors penetrate the substrate.

14 . A coil component comprising:
a first coil conductor wound in a plurality of turns on a first plane; a second coil conductor wound in a plurality of turns on the first plane so that the first and second coil conductors are concentrically wound; a third coil conductor wound in a plurality of turns on a second plane; a fourth coil conductor wound in a plurality of turns on the second plane so that the third and fourth coil conductors are concentrically wound; a first electrode connected in common to outermost ends of the first and second coil conductors; a second electrode connected in common to outermost ends of the third and fourth coil conductors; a first connection conductor connected between innermost ends of the first and fourth coil conductors; and a second connection conductor connected between innermost ends of the second and third coil conductors.

15 . The coil component as claimed in claim 14 ,
wherein the first coil conductor has an innermost turn that is smaller in a diameter than an innermost turn of the second coil conductor, and wherein the third coil conductor has an innermost turn that is smaller in a diameter than an innermost turn of the fourth coil conductor.

16 . The coil component as claimed in claim 15 ,
wherein the first coil conductor has an outermost turn that is smaller in a diameter than an outermost turn of the second coil conductor, and wherein the third coil conductor has an outermost turn that is smaller in a diameter than an outermost turn of the fourth coil conductor.

17 . The coil component as claimed in claim 14 , further comprising a substrate having first and second surfaces opposite to each other,
wherein the first surface constitutes the first plane, and the second surface constitutes the second plane.

18 . The coil component as claimed in claim 17 , wherein the first and second connection conductors penetrate the substrate.

Assignees

• Tdk Corp

Inventors

• Komachi Toshifumi
• Kunitsuka Kosuke
• Tomonari Toshio

Classifications

• H01F27/24

  Magnetic cores · CPC title

• H01F2027/2809

  on stacked layers · CPC title

• H01F27/29

  Terminals; Tapping arrangements {for signal inductances} · CPC title

• H01F27/34 Primary

  Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields · CPC title

• H01F27/06

  Mounting, supporting or suspending transformers, reactors or choke coils {not being of the signal type} · CPC title