Coil component

Patent metadata

Field	Value
Publication number	US-10319506-B2
Application number	US-201715590341-A
Country	US
Kind code	B2
Filing date	May 9, 2017
Priority date	May 11, 2016
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

Disclosed herein is a coil component that includes an element body made of a first magnetic material, a coil conductor embedded in the element body, and first and second magnetic films made of a second magnetic material having higher permeability than that of the first magnetic material. The element body has an upper surface crossing a coil axis of the coil conductor and first and second side surfaces extending substantially parallel to the coil axis. The first magnetic film is formed on the upper surface and first side surface of the element body, and the second magnetic film is formed on the upper surface and second side surface of the element body.

First claim

What is claimed is:

1. A coil component comprising:
an element body made of a first magnetic material;
a coil conductor embedded in the element body; and
first and second magnetic films made of a second magnetic material having higher permeability than that of the first magnetic material,
wherein the element body has an upper surface crossing a coil axis of the coil conductor and first and second side surfaces extending substantially parallel to the coil axis, and
wherein the first magnetic film is formed on the upper surface and first side surface of the element body, and the second magnetic film is formed on the upper surface and second side surface of the element body.

2. The coil component as claimed in claim 1 ,
wherein the element body further has a mounting surface opposite to the upper surface, and
wherein the first and second magnetic films are further formed on the mounting surface of the element body.

3. The coil component as claimed in claim 1 , further comprising a first terminal electrode connected to one end of the coil conductor and a second terminal electrode connected to other end of the coil conductor,
wherein the element body further has third and fourth side surfaces extending substantially parallel to the coil axis and crossing at substantially right angles to the first and second side surfaces, and
wherein the first terminal electrode is formed on at least the third side surface, and the second terminal electrode is formed on at least the fourth side surface.

4. The coil component as claimed in claim 1 , wherein a part of the first magnetic film that is formed on the first side surface is separated by a first slit, and a part of the second magnetic film that is formed on the second side surface is separated by a second slit.

5. The coil component as claimed in claim 4 , wherein each of the first and second slits is extended in substantially perpendicular to the coil axis.

6. The coil component as claimed in claim 5 , wherein each of the first and second slits is offset to a mounting surface of the element body positioned opposite to the upper surface.

7. The coil component as claimed in claim 1 , further comprising a third magnetic film formed on the upper surface of the element body independent of the first and third magnetic films.

8. The coil component as claimed in claim 1 ,
wherein the upper surface of the element body includes first, second and third sections,
wherein the first magnetic film is formed on the first section of the upper surface,
wherein the second magnetic film is formed on the second section of the upper surface, and
wherein the upper surface of the element body is exposed at the third section so that the third section of the upper surface is free from the first and second magnetic films.

9. A coil component comprising:
an element body having first and second surfaces opposite to each other and third and fourth surfaces opposite to each other, and fifth and sixth surfaces opposite to each other;
a coil conductor embedded in the element body;
a first magnetic film formed on the first surface and the fifth surface;
a second magnetic film formed on the second surface and the fifth surface;
a first terminal electrode connected to one end of the coil conductor, the first terminal electrode being formed on the third surface; and
a second terminal electrode connected to other end of the coil conductor, the second terminal electrode being formed on the fourth surface.

10. The coil component as claimed in claim 9 , further comprising a third magnetic film formed on the fifth surface.

11. The coil component as claimed in claim 9 , wherein the first and second magnetic films are further formed on the sixth surface.

12. The coil component as claimed in claim 9 , wherein the third and fourth surfaces are free from the first and second magnetic films.

13. The coil component as claimed in claim 9 ,
wherein the first magnetic film is divided into first and second sections by a first slit formed on the first surface, and
wherein the second magnetic film is divided into third and fourth sections by a second slit formed on the second surface.

14. The coil component as claimed in claim 13 , wherein the first section is greater than the second section, and the third section is greater than the fourth section.

15. The coil component as claimed in claim 9 , wherein the coil conductor has a coil axis that is substantially parallel to the first to fourth surfaces.

16. The coil component as claimed in claim 9 ,
wherein the fifth surface of the element body includes first, second and third sections,
wherein the first magnetic film is formed on the first section of the fifth surface,
wherein the second magnetic film is formed on the second section of the fifth surface, and
wherein the fifth surface of the element body is exposed at the third section so that the third section of the upper surface is free from the first and second magnetic films.

17. A coil component comprising:
an element body having a first surface, the first surface including first to fifth sections;
a coil conductor embedded in the element body, the coil conductor having a coil axis that is substantially perpendicular to the first surface;
a first magnetic film formed on the first section of the first surface;
a second magnetic film formed on the second section of the first surface;
a first terminal electrode connected to one end of the coil conductor, the first terminal electrode being formed on the third section of the first surface; and
a second terminal electrode connected to other end of the coil conductor, the second terminal electrode being formed on the fourth section of the first surface,
wherein the first surface of the element body is exposed at the fifth section so that the fifth section of the first surface is free from the first and second magnetic films and the first and second terminal electrodes so as to separate the first and second magnetic films and the first and second terminal electrodes from one another.

18. The coil component as claimed in claim 17 ,
wherein the first surface further includes a sixth section surrounded by the fifth section, and
wherein the coil component further comprises a third magnetic film formed on the sixth section of the first surface.

19. The coil component as claimed in claim 17 ,
wherein the element body further has second and third surfaces opposite to each other,
wherein the first magnetic film is further formed on the second surface, and
wherein the second magnetic film is further formed on the third surface.

Assignees

• Tdk Corp

Inventors

• Tomonari Toshio
• Takano Sachiko
• Sato Shigeki

Classifications

• H01F2017/008

  Electric or magnetic shielding of printed inductances · CPC title

• H01F2003/106

  Magnetic circuits using combinations of different magnetic materials · CPC title

• H01F17/04

  with magnetic core · CPC title

• H01F17/0013 Primary

  with stacked layers · CPC title

• H01F2017/0066

  with a magnetic layer · CPC title