Coil component

Patent metadata

Field	Value
Publication number	US-11538619-B2
Application number	US-202016829756-A
Country	US
Kind code	B2
Filing date	Mar 25, 2020
Priority date	Mar 26, 2019
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A coil component including an element assembly that includes a support substrate having a cavity, a first coil disposed on a first principal surface of the support substrate, a second coil disposed on a second principal surface of the support substrate, and a magnetic portion. The coil component further includes first and second outer electrodes electrode electrically coupled to the first coil, and third and further outer electrodes electrically coupled to the second coil. Each outer electrode is disposed on the surface of the element assembly. The cavity of the support substrate, the core portion of the first coil, and the core portion of the second coil overlap at least one another when viewed in the direction perpendicular to the principal surface. The magnetic portion is disposed in at least the cavity and the two core portions. Also, the support substrate is formed of sintered ferrite.

First claim

What is claimed is:

1. A coil component comprising:
an element assembly that includes
a support substrate having a cavity,
a first coil, disposed on a first principal surface of the support substrate, and having a first core portion,
a second coil, disposed on a second principal surface of the support substrate, and having a second core portion, and
a magnetic portion; and

a first outer electrode and a second outer electrode electrically coupled to the first coil, and a third outer electrode and a fourth outer electrode electrically coupled to the second coil, each of the outer electrodes being disposed on a surface of the element assembly,
wherein
the cavity of the support substrate, the first core portion of the first coil, and the second core portion of the second coil overlap at least one another in plan view when viewed in the direction perpendicular to the principal surface of the support substrate,
the magnetic portion is disposed in at least the cavity of the support substrate, the core portion of the first coil, and the core portion of the second coil, and
the support substrate is formed of sintered ferrite.

2. The coil component according to claim 1 , wherein
a thickness of the support substrate is from 40 μm to 80 μm.

3. The coil component according to claim 1 , wherein
a magnetic permeability μ1 of the magnetic portion is from 20 to 40.

4. The coil component according to claim 1 , wherein
a ratio of a magnetic permeability μ2 of the support substrate to a magnetic permeability μ1 of the magnetic portion is 0.7 or less.

5. The coil component according to claim 1 , wherein
(x, y) are present in a region surrounded by A-B-C-D-E-F-G-H-I-J-A described below
A (40, 0.15), B (50, 0.11), C (60, 0.08), D (70, 0.06), E (80, 0.05), F (80, 0.20), G (70, 0.25), H (60, 0.30), I (50, 0.41), and J (40, 0.54)
where x (μm) represents a thickness of the support substrate and y represents a ratio of a magnetic permeability μ2 of the support substrate to a magnetic permeability μ1 of the magnetic portion.

6. The coil component according to claim 2 , wherein
a magnetic permeability μ1 of the magnetic portion is from 20 to 40.

7. The coil component according to claim 2 , wherein
a ratio of a magnetic permeability μ2 of the support substrate to a magnetic permeability μ1 of the magnetic portion is 0.7 or less.

8. The coil component according to claim 3 , wherein
a ratio of a magnetic permeability μ2 of the support substrate to the magnetic permeability μ1 of the magnetic portion is 0.7 or less.

9. The coil component according to claim 6 , wherein
a ratio of a magnetic permeability μ2 of the support substrate to the magnetic permeability μ1 of the magnetic portion is 0.7 or less.

10. The coil component according to claim 2 , wherein
(x, y) are present in a region surrounded by A-B-C-D-E-F-G-H-I-J-A described below
A (40, 0.15), B (50, 0.11), C (60, 0.08), D (70, 0.06), E (80, 0.05), F (80, 0.20), G (70, 0.25), H (60, 0.30), I (50, 0.41), and J (40, 0.54)
where x (μm) represents the thickness of the support substrate and y represents a ratio of a magnetic permeability μ2 of the support substrate to a magnetic permeability μ1 of the magnetic portion.

11. The coil component according to claim 3 , wherein
(x, y) are present in a region surrounded by A-B-C-D-E-F-G-H-I-J-A described below
A (40, 0.15), B (50, 0.11), C (60, 0.08), D (70, 0.06), E (80, 0.05), F (80, 0.20), G (70, 0.25), H (60, 0.30), I (50, 0.41), and J (40, 0.54)
where x (μm) represents a thickness of the support substrate and y represents a ratio of a magnetic permeability μ2 of the support substrate to the magnetic permeability μ1 of the magnetic portion.

12. The coil component according to claim 4 , wherein
(x, y) are present in a region surrounded by A-B-C-D-E-F-G-H-I-J-A described below
A (40, 0.15), B (50, 0.11), C (60, 0.08), D (70, 0.06), E (80, 0.05), F (80, 0.20), G (70, 0.25), H (60, 0.30), I (50, 0.41), and J (40, 0.54)
where x (μm) represents a thickness of the support substrate and y represents a ratio of the magnetic permeability μ2 of the support substrate to the magnetic permeability μ1 of the magnetic portion.

13. The coil component according to claim 6 , wherein
(x, y) are present in a region surrounded by A-B-C-D-E-F-G-H-I-J-A described below
A (40, 0.15), B (50, 0.11), C (60, 0.08), D (70, 0.06), E (80, 0.05), F (80, 0.20), G (70, 0.25), H (60, 0.30), I (50, 0.41), and J (40, 0.54)
where x (μm) represents the thickness of the support substrate and y represents a ratio of a magnetic permeability μ2 of the support substrate to the magnetic permeability μ1 of the magnetic portion.

14. The coil component according to claim 7 , wherein
(x, y) are present in a region surrounded by A-B-C-D-E-F-G-H-I-J-A described below
A (40, 0.15), B (50, 0.11), C (60, 0.08), D (70, 0.06), E (80, 0.05), F (80, 0.20), G (70, 0.25), H (60, 0.30), I (50, 0.41), and J (40, 0.54)
where x (μm) represents the thickness of the support substrate and y represents a ratio of the magnetic permeability μ2 of the support substrate to the magnetic permeability μ1 of the magnetic portion.

15. The coil component according to claim 8 , wherein
(x, y) are present in a region surrounded by A-B-C-D-E-F-G-H-I-J-A described below
A (40, 0.15), B (50, 0.11), C (60, 0.08), D (70, 0.06), E (80, 0.05), F (80, 0.20), G (70, 0.25), H (60, 0.30), I (50, 0.41), and J (40, 0.54)
where x (μm) represents a thickness of the support substrate and y represents a ratio of the magnetic permeability μ2 of the support substrate to the magnetic permeability μ1 of the magnetic portion.

16. The coil component according to claim 9 , wherein
(x, y) are present in a region surrounded by A-B-C-D-E-F-G-H-I-J-A described below
A (40, 0.15), B (50, 0.11), C (60, 0.08), D (70, 0.06), E (80, 0.05), F (80, 0.20), G (70, 0.25), H (60, 0.30), I (50, 0.41), and J (40, 0.54)
where x (μm) represents the thickness of the support substrate and y represents a ratio of the magnetic permeability μ2 of the support substrate to the magnetic permeability μ1 of the magnetic portion.

Assignees

• Murata Manufacturing Co

Inventors

• Sato Mitsuhiro
• Kawabata Ryohei

Classifications

• H01F17/04

  with magnetic core · CPC title

• H01F27/29

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

• H01F27/2804 Primary

  Printed windings · CPC title

• H01F27/292 Primary

  Surface mounted devices · CPC title

• H01F17/0013

  with stacked layers · CPC title