Multilayer coil component

Patent metadata

Field	Value
Publication number	US-12456567-B2
Application number	US-202217939027-A
Country	US
Kind code	B2
Filing date	Sep 7, 2022
Priority date	Sep 9, 2021
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

A multilayer coil component includes: an element body formed by stacking a magnetic body layer containing a plurality of metal magnetic particles of a soft magnetic material; a first coil disposed in the element body and configured to include a plurality of first coil conductors; a second coil disposed in the element body and configured to include a plurality of second coil conductors; a first external electrode to which one end portion of each of the first coil and the second coil is connected; and a second external electrode to which the other end portion of each of the first coil and the second coil is connected.

First claim

What is claimed is:

1. A multilayer coil component comprising:
an element body formed by stacking a magnetic body layer containing a plurality of metal magnetic particles of a soft magnetic material;
a first coil disposed in the element body and configured to include a plurality of first coil conductors;
a second coil disposed in the element body and configured to include a plurality of second coil conductors;
a first external electrode to which one end portion of each of the first coil and the second coil is connected; and
a second external electrode to which the other end portion of each of the first coil and the second coil is connected, wherein
the first coil and the second coil are separated from each other in a stacking direction of the magnetic body layer in the element body, and
between the first coil and the second coil of the element body, at least a region where the first coil and the second coil overlap when viewed from the stacking direction is higher in electrical resistivity than the magnetic body layer.

2. The multilayer coil component according to claim 1 , wherein a high-resistance portion having a width dimension equal to or greater than width dimensions of the first coil conductor and the second coil conductor and higher in electrical resistivity than the magnetic body layer is disposed in the region where the first coil and the second coil overlap when viewed from the stacking direction.

3. The multilayer coil component according to claim 1 , wherein a high-resistance layer higher in electrical resistivity than the magnetic body layer is provided between the first coil and the second coil in the element body.

4. The multilayer coil component according to claim 1 , wherein
the first coil has a first connecting conductor connected to the first external electrode and a second connecting conductor connected to the second external electrode,
the second coil has a third connecting conductor connected to the first external electrode and a fourth connecting conductor connected to the second external electrode,
a distance between the second connecting conductor and the fourth connecting conductor is shorter than a distance between the first connecting conductor and the third connecting conductor in the stacking direction of the magnetic body layer, and
a winding direction of the first coil and a winding direction of the second coil are the same when viewed from the stacking direction.

5. The multilayer coil component according to claim 1 , wherein a plurality of metal magnetic particles are disposed along the stacking direction of the magnetic body layer between the first coil and the second coil.

6. A multilayer coil component comprising:
an element body formed by stacking a magnetic body layer containing a plurality of metal magnetic particles of a soft magnetic material;
a first coil disposed in the element body and configured to include a plurality of first coil conductors;
a second coil disposed in the element body and configured to include a plurality of second coil conductors;
a first external electrode to which one end portion of each of the first coil and the second coil is connected; and
a second external electrode to which the other end portion of each of the first coil and the second coil is connected, wherein
a conductor closest to the second coil in the first coil and a conductor closest to the first coil in the second coil do not overlap when viewed from the stacking direction of the magnetic body layer.

7. A multilayer coil component comprising:
an element body formed by stacking a magnetic body layer containing a plurality of metal magnetic particles of a soft magnetic material;
a first coil disposed in the element body and configured to include a plurality of first coil conductors;
a second coil disposed in the element body and configured to include a plurality of second coil conductors;
a first external electrode to which one end portion of each of the first coil and the second coil is connected; and
a second external electrode to which the other end portion of each of the first coil and the second coil is connected, wherein
the first coil has a first connecting conductor connected to the first external electrode and a second connecting conductor connected to the second external electrode,
the second coil has a third connecting conductor connected to the first external electrode and a fourth connecting conductor connected to the second external electrode,
a distance between the second connecting conductor and the fourth connecting conductor is shorter than a distance between the first connecting conductor and the third connecting conductor in a stacking direction of the magnetic body layer, and
a winding direction of the first coil is opposite to a winding direction of the second coil when viewed from the stacking direction.

8. The multilayer coil component according to claim 7 , wherein the number of the first coil conductors of the first coil is the same as the number of the second coil conductors of the second coil.

Assignees

• Tdk Corp

Inventors

• Nagai Yusuke
• Ebina Kazuhiro
• Sato Takahiro
• Kawasaki Kunihiko
• Sato Shinichi
• Kondo Shinichi
• Kakuda Kouichi
• ISHIMA Yuya
• Ito Kosuke

Classifications

• H01F27/292

  Surface mounted devices · CPC title

• H01F3/08

  made from powder (powder coatings on sheets H01F3/02; on strips or ribbons H01F3/04; on wires H01F3/06) · CPC title

• H01F5/04

  Arrangements of electric connections to coils, e.g. leads · CPC title

• H01F17/04

  with magnetic core · CPC title

• H01F41/043

  by thick film techniques · CPC title