Coil component

• US 9,305,698 B2
• Filed: 09/02/2014
• Issued: 04/05/2016
• Est. Priority Date: 09/03/2013
• Status: Active Grant

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: Takagi, Nobuo, Tsuchida, Setu, Mikogami, Tasuku, Sariishi, Satoru
• Primary Examiner(s): Lian, Mangtin
• Application Number:
  US14/475,183
• Publication Number:
  US 20150061811A1
• Time in Patent Office: 581 Days
• Field of Search: 336/212, 336/192, 336/83
• US Class Current: 1/1
• CPC Class Codes: H01F 27/292 Surface mounted devices

Abstract

A coil component is provided with a coil, a base supporting the coil having a first surface parallel to an extending direction of the terminal section of the coil, and a terminal electrode having a first terminal portion printed on the first surface of the base. The first surface has a stepped surface including an upper stage surface and a lower stage surface. The first terminal portion has a stepped shape including an upper stage portion formed on the upper stage surface and a lower stage portion formed on the lower stage surface. The upper stage portion has a first terminal surface contacting the terminal section of the coil. The lower stage portion has a second terminal surface positioned on an extension line of the terminal section of the coil and not contacting the terminal section of the coil.

Claims

1. A coil component comprising:

a coil having a winding wire;

a base supporting the coil; and

a terminal electrode to which a terminal section of the coil is connected, wherein

the base has a first surface substantially parallel to an extending direction of the terminal section of the coil,

the terminal electrode has a first terminal portion printed, on the first surface of the base,

the first surface has a stepped surface including an upper stage surface and a lower stage surface, the upper and lower stage surfaces facing in the same direction,

the first terminal portion has a stepped shape including an upper stage portion formed on the upper stage surface and a lower stage portion formed on the lower stage surface,

the upper stage portion has a first terminal surface contacting, the terminal section of the coil, and

the lower stage portion has a second terminal surface positioned on an extension line of the terminal section of the coil and not contacting the terminal section of the coil.

2. The coil component as claimed in claim 1, wherein

the base has a second surface substantially perpendicular to the first surface,

the terminal electrode is formed into an L-shape and has a second terminal portion printed on the second surface of the base, and

the second terminal portion is connected to the lower stage portion of the first terminal portion.

3. The coil component as claimed in claim 1, wherein

the base is a drum core having a winding core around which the coil is wound and a pair of flanges provided, at both ends of the winding core, and

the terminal electrode is formed on each of the flanges.

13. The coil component as claimed in claim 1, wherein the base further has a third surface substantially parallel to the extending direction of the terminal section of the coil, the first and third surfaces being opposite to the each other.

14. The coil component as claimed in claim 13, wherein the third surface is free from the terminal electrode.

15. The coil component as claimed in claim 14, further comprising a plate core connected to the third surface of the base.

4. A coil component comprising:

a drum core having a winding core and a flange provided at an end of the winding core, the flange including a first plane having a first height from the winding core and a second plane having, a second height from the winding core, the first height being, greater than the second height, the first and second planes facing in the same direction;

a terminal electrode having a first portion formed on the first plane of the flange and a second portion formed on the second plane of the flange, the first portion having a third height from the winding core, the second portion having a fourth height from the winding core, the third height being greater than the fourth height, the first and second portions facing in the same direction; and

a coil wound around the winding core, the coil having a terminal section connected to the first portion of the terminal electrode so that the terminal section is free from contacting the second portion of the terminal electrode.

5. The coil component as claimed in claim 4, wherein the terminal electrode is continuously formed on the first and second planes of the flange.

6. The coil component as claimed in claim 5, wherein the second plane is positioned at an opposite side of the winding core with respect to the first plane.

7. The coil component as claimed in claim 6, wherein the terminal section of the coil is terminated at vicinity of a boundary between the first and second planes.

8. The coil component as claimed in claim 4, wherein

the flange further includes a third plane substantially perpendicular to the first and second plane,

the terminal electrode is formed on the first, second and third planes of the flange, and

the terminal electrode is continuously formed on the first, second and third planes of the flange.

9. The coil component as claimed in claim 4, wherein the terminal electrode is printed on the first and second planes of the flange.

16. The coil component as claimed in claim 4, wherein the flange further includes a fourth plane opposite to each of the first and second planes.

17. The coil component as claimed in claim 16, wherein the fourth plane is free from the terminal electrode.

18. The coil component as claimed in claim 17, further comprising a plate core connected to the fourth plane of the drum core.

10. A coil component comprising:

a drum core having a winding core and a flange provided at an end of the winding core, the flange including a first plane having a first height from the winding core, a second plane having a second height from the winding core and substantially parallel to the first plan, and a third plane substantially perpendicular to the first and second planes, the first and second planes facing in the same direction, the first height being greater than the second height;

a terminal electrode continuously formed on the first, second and third planes of the flange, the terminal electrode having first, second and third electrodes formed on the first, second and third planes of the flange, respectively, the second electrode being connected between the first and third electrodes, the first electrode having a third height from the winding core, the second electrode having a fourth height from the winding core, the third height being greater than the fourth height, the first and second electrodes facing in the same direction; and

a coil wound around the winding core, the coil having a terminal section contacting the first electrode without contacting the second and third electrodes.

11. The coil component as claimed in claim 10, wherein the terminal section of the coil is terminated at vicinity of a boundary between the first and second planes.

12. The coil component as claimed in claim 10, wherein the terminal electrode is printed on the first, second and third planes of the flange.

19. The coil component as claimed, in claim 10, wherein the flange further includes a fourth plane opposite to each of the first and second planes.

20. The coil component as claimed in claim 19, wherein the fourth plane is free from the terminal electrode.

21. The coil component as claimed in claim 20, further comprising a plate core connected to the fourth plane of the drum core.