Electronic component

Patent metadata

Field	Value
Publication number	US-9997288-B2
Application number	US-201514872980-A
Country	US
Kind code	B2
Filing date	Oct 1, 2015
Priority date	Oct 1, 2014
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

An electronic component includes a body and a coil. The body includes first to fourth insulator layers composed of an anisotropic magnetic material, an internal magnetic circuit composed of an isotropic magnetic material and an external magnetic circuit composed of an isotropic magnetic material. The second and third insulator layers cover an upper surface and a lower surface of the coil from a z-axis direction. The internal magnetic circuit and the external magnetic circuit are adjacent to each other in a direction orthogonal to the z-axis direction. In addition, a direction of easy magnetization of the anisotropic magnetic material used in the first to fourth insulator layers is orthogonal to the z-axis direction.

First claim

What is claimed is:

1. An electronic component comprising:
a body composed of an insulator including an anisotropic magnetic material and an isotropic magnetic material; and
a coil located inside the body;
wherein the anisotropic magnetic material is provided so as to cover an end surface, the end surface being a surface of an end portion of the coil in a central axis direction, which is parallel to a central axis of the coil, and being a surface of a conductor portion of the coil,
the isotropic magnetic material is adjacent to the anisotropic magnetic material in an orthogonal direction, which is orthogonal to the central axis direction, and
a direction of easy magnetization of a portion of the anisotropic magnetic material that covers the end surface in a vicinity of an interface between the anisotropic magnetic material and the isotropic magnetic material coincides with the orthogonal direction.

2. The electronic component according to claim 1 ,
wherein the isotropic magnetic material extends from a surface of an end portion of the body on one side in the central axis direction to a surface of an end portion of the body on another side in the central axis direction, and
an end portion of the isotropic magnetic material on the other side is substantially shaped like a cone or a hemisphere.

3. The electronic component according to claim 1 ,
wherein the anisotropic magnetic material is provided so as to be sandwiched by the isotropic magnetic material in the central axis direction, and
a direction of easy magnetization of a portion of the anisotropic magnetic material provided so as to be sandwiched by the isotropic magnetic material in the central axis direction coincides with the central axis direction.

4. The electronic component according to claim 1 , wherein
a direction of a magnetic flux generated by the coil at an interface between the anisotropic magnetic material and the isotropic magnetic material substantially coincides with the orthogonal direction.

5. An electronic component comprising:
a body composed of an insulator including an anisotropic magnetic material and an isotropic magnetic material; and
a coil located inside the body;
wherein the anisotropic magnetic material is provided so as to cover an end surface, the end surface being a surface of an end portion of the coil in a central axis direction, which is parallel to a central axis of the coil, and being a surface of a conductor portion of the coil,
the isotropic magnetic material is adjacent to the anisotropic magnetic material in an orthogonal direction, which is orthogonal to the central axis direction, and
a direction of easy magnetization of a portion of the anisotropic magnetic material that covers the end surface in a vicinity of an interface between the anisotropic magnetic material and the isotropic magnetic material coincides with the orthogonal direction,
wherein the isotropic magnetic material extends from a surface of an end portion of the body on one side in the central axis direction to a surface of an end portion of the body on another side in the central axis direction.

Assignees

• Murata Manufacturing Co

Inventors

• Yamaguchi Koichi
• Kitajima Masaki
• Hamada Akinori

Classifications

• H01F17/04

  with magnetic core · CPC title

• H01F27/292

  Surface mounted devices · CPC title

• H01F17/0006 Primary

  Printed inductances (printed coils for dynamo-electric machines H02K3/26; printed circuits H05K) · CPC title