Coil component and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-12394560-B2
Application number	US-202217695774-A
Country	US
Kind code	B2
Filing date	Mar 15, 2022
Priority date	Mar 27, 2021
Publication date	Aug 19, 2025
Grant date	Aug 19, 2025

Abstract

A coil component includes a main body made of a magnetic material, a linear inductor wiring conductor arranged in the main body, an electrically insulating pedestal having a top surface extending along the inductor wiring conductor in the main body and a pair of side surfaces each extending from both outer edges of the top surface in a direction intersecting the top surface, and a conductive seed layer provided over an entire region of at least a region sandwiched between the top surface of the pedestal and the inductor wiring conductor. When a width dimension of a surface of the inductor wiring conductor in contact with the seed layer is defined as a first width dimension and a width dimension of the seed layer is defined as a second width dimension, the second width dimension is larger than the first width dimension.

First claim

What is claimed is:

1. A coil component comprising:
a main body including a magnetic material;
a linear inductor wiring conductor arranged in the main body;
an electrically insulating pedestal having a top surface extending along the inductor wiring conductor in the main body and a pair of side surfaces each extending from both outer edges of the top surface in a direction intersecting the top surface, and at least one of the side surfaces is inclined with respect to the top surface; and
a conductive seed layer over an entire region of at least a region sandwiched between the top surface of the pedestal and the inductor wiring conductor,
wherein when a width dimension in a width direction of a surface of the inductor wiring conductor in contact with the seed layer is defined as a first width dimension and a width dimension in the width direction of the seed layer is defined as a second width dimension, the second width dimension is larger than the first width dimension.

2. The coil component according to claim 1 , further comprising:
an external terminal electrode exposed on an outer surface of the main body; and
an extended conductor that is positioned so as to overlap an end portion of the inductor wiring conductor and electrically connects the end portion of the inductor wiring conductor to the external terminal electrode.

3. The coil component according to claim 2 , wherein
the seed layer is on the top surface and the side surface of the pedestal.

4. The coil component according to claim 2 , wherein
the seed layer is on the top surface of the pedestal, but is absent from the side surface of the pedestal.

5. The coil component according to claim 2 , further comprising:
a close contact layer configured to improve a close contact property between the seed layer and the pedestal.

6. The coil component according to claim 2 , wherein
the inductor wiring conductor and the seed layer include materials having the same main component.

7. The coil component according to claim 2 , wherein
the pedestal includes resin.

8. The coil component according to claim 1 , wherein
the seed layer is on the top surface of the pedestal, but is absent from the side surface of the pedestal.

9. The coil component according to claim 1 , wherein
the inductor wiring conductor and the seed layer include materials having the same main component.

10. The coil component according to claim 1 , wherein
the pedestal includes resin.

11. The coil component according to claim 1 , wherein
the side surfaces meet the top surface at opposite edges of the top surface, and a distance between the opposite edges is greater than the first width dimension.

12. A coil component comprising:
a main body including a magnetic material;
a linear inductor wiring conductor arranged in the main body;
an electrically insulating pedestal having a top surface extending along the inductor wiring conductor in the main body and a pair of side surfaces each extending from both outer edges of the top surface in a direction intersecting the top surface; and
a conductive seed layer over an entire region of at least a region sandwiched between the top surface of the pedestal and the inductor wiring conductor,
wherein when a width dimension in a width direction of a surface of the inductor wiring conductor in contact with the seed layer is defined as a first width dimension and a width dimension in the width direction of the seed layer is defined as a second width dimension, the second width dimension is larger than the first width dimension, and
the seed layer is on the top surface and the side surface of the pedestal.

13. The coil component according to claim 12 , wherein
the seed layer is over an entire region of each of the top surface and the side surface of the pedestal.

14. The coil component according to claim 13 , further comprising:
a close contact layer configured to improve a close contact property between the seed layer and the pedestal.

15. The coil component according to claim 12 , wherein
the seed layer has a discontinuous portion on a part of at least one of the top surface and the side surface of the pedestal.

16. The coil component according to claim 12 , further comprising:
a close contact layer configured to improve a close contact property between the seed layer and the pedestal.

17. The coil component according to claim 12 , wherein
the inductor wiring conductor and the seed layer include materials having the same main component.

18. The coil component according to claim 12 , wherein
the pedestal includes resin.

19. A coil component comprising:
a main body including a magnetic material;
a linear inductor wiring conductor arranged in the main body;
an electrically insulating pedestal having a top surface extending along the inductor wiring conductor in the main body and a pair of side surfaces each extending from both outer edges of the top surface in a direction intersecting the top surface;
a conductive seed layer over an entire region of at least a region sandwiched between the top surface of the pedestal and the inductor wiring conductor; and
a close contact layer configured to improve a close contact property between the seed layer and the pedestal,
wherein when a width dimension in a width direction of a surface of the inductor wiring conductor in contact with the seed layer is defined as a first width dimension and a width dimension in the width direction of the seed layer is defined as a second width dimension, the second width dimension is larger than the first width dimension.

Assignees

• Murata Manufacturing Co

Inventors

• Tominaga Ryuichiro
• Kunimori Keisuke
• Kawakami Yuuki
• Yoshioka Yoshimasa

Classifications

• H01F41/041

  Printed circuit coils (apparatus or processes for manufacturing printed circuits in general H05K3/00) · CPC title

• H01F2017/048

  with encapsulating core, e.g. made of resin and magnetic powder · CPC title

• H01F17/04

  with magnetic core · CPC title

• H01F2017/0066

  with a magnetic layer · CPC title

• H01F17/0013 Primary

  with stacked layers · CPC title