Coil component

Patent metadata

Field	Value
Publication number	US-10861637-B2
Application number	US-201715824195-A
Country	US
Kind code	B2
Filing date	Nov 28, 2017
Priority date	Mar 16, 2017
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

A coil component includes a support member, an internal coil supported by the support member, and external electrodes connected to the internal coil. The external electrodes may each include a first layer coming into contact with the internal coil and a second layer disposed on a surface of the first layer. The first layer may serve as a buffer layer for improving a contact property between the internal coil and the external electrode. The second layer may be disposed to come into at least partial contact with a first end portion of the support member and a second end portion of the support member.

First claim

What is claimed is:

1. A coil component comprising:
a support member;
an internal coil supported by the support member and including a plurality of coil patterns; and
external electrodes connected to the internal coil and each including a first layer coming into contact with the internal coil and a second layer disposed on the first layer,
wherein the first layers each have a through-hole extending therethrough, and the second layers are each disposed to extend through the through-hole of a corresponding first layer and come into at least partial contact with a corresponding first or second end portion of the support member.

2. The coil component of claim 1 , wherein a region of a first end surface of the support member that does not come in contact with the second layer comes in contact with the first layer of at least one of the external electrodes, and a region of a second end surface of the support member that does not come in contact with the second layer comes in contact with the first layer of at least one of the external electrodes.

3. The coil component of claim 1 , wherein the first layer includes a single metal or an alloy.

4. The coil component of claim 3 , wherein the first layer contains one or more of copper (Cu) and nickel (Ni).

5. The coil component of claim 1 , wherein the second layer includes a metal-epoxy composite.

6. The coil component of claim 1 , wherein an average thickness T 1 of the first layer is equal to or less than ½ of a thickness Ts of the support member.

7. The coil component of claim 1 , wherein the support member and the internal coil are embedded in a body containing a magnetic material.

8. A coil component comprising:
a body containing a magnetic material, in which an internal coil supported by a support member is embedded, and having upper and lower surfaces opposing each other in a thickness direction, first and second side surfaces opposing each other in a length direction, and first and second end surfaces opposing each other in a width direction; and
first and second external electrodes disposed on the first and second end surfaces of the body, respectively,
wherein first and second end surfaces of the support member are exposed to and coplanar with the first and second end surfaces of the body, respectively,
the first and second external electrodes each include a first layer and a second layer disposed on the first layer,
an area occupied by the first layer of the first external electrode on the first end surface of the body is smaller than an area of the first end surface of the body, and
an area occupied by the first layer of the second external electrode on the second end surface of the body is smaller than an area of the second end surface of the body.

9. The coil component of claim 8 , wherein the second layer of each of the first and second external electrodes covers a surface of the first layer of the corresponding one of the first and second external electrodes.

10. The coil component of claim 8 , wherein the first layer of each of the first and second external electrodes does not contain a resin, and the second layer of each of the first and second external electrodes contains a resin.

11. The coil component of claim 8 , wherein the first layer is disposed to include two separate portions spaced apart from each other on the first end surface.

12. The coil component of claim 11 , wherein the two separate portions of the first layer and a space therebetween are covered by the second layer.

13. The coil component of claim 8 , wherein the internal coil includes upper and lower coils, the upper coil being disposed above the first end surface, the lower coil being disposed below the second end surface, and the upper and lower coils being connected to each other through one or more via holes penetrating through the support member.

14. The coil component of claim 13 , wherein a first dummy electrode is disposed on a plane on which the upper coil is disposed, and is exposed to the second end surface of the body to thereby be connected to the second external electrode,
a second dummy electrode is disposed on a plane on which the lower coil is disposed, and is exposed to the first end surface of the body to thereby be connected to the first external electrode, and
the first and second dummy electrodes are disposed to be spaced apart from the upper and lower coils, respectively.

15. The coil component of claim 8 , wherein the support member has a glass transition temperature (Tg) in a range of 250° C. or more to 350° C. or less.

16. The coil component of claim 8 , wherein the external electrode further includes a third layer formed on a surface of the second layer, the third layer containing one or more of Ni and Sn.

17. A coil component comprising:
a body including a magnetic material;
a support member embedded within the body;
an internal coil disposed on the support member and within the body; and
external electrodes disposed on first and second outer surfaces of the body,
wherein each external electrode includes a first layer disposed to contact a portion of the internal coil extending to a respective outer surface of the first and second outer surfaces of the body, the first layer including a metal and being free of a resin,
each external electrode further includes a second layer disposed on the first layer, the second layer contacting at least a portion of the respective outer surface of the first and second outer surfaces, and the second layer including a metal and a resin,
the internal coil and support member extend to outer surfaces of the body, and
the second layer of each external electrode is disposed on the first layer and contacts a portion of the support member extending to a respective outer surface of the body.

18. The coil component of claim 17 , wherein the first layer of each external electrode is disposed to include two separate portions spaced apart from each other on the respective surface of the body, and
the second layer of each respective external electrode contacts the portion of the support member in a space between the two separate portions of the first layer of the respective external electrode.

19. The coil component of claim 17 , wherein the first layer includes a single metal or an alloy.

20. The coil component of claim 19 , wherein the first layer contains one or more of copper (Cu) and nickel (Ni).

21. The coil component of claim 17 , wherein the second layer includes a metal-epoxy composite.

22. The coil component of claim 17 , wherein the first layers of the external electrodes are fully covered by the second layers of the external electrodes.

Assignees

• Samsung Electro Mech

Inventors

• Lee Hwan Soo
• Ryu Han Wool
• Oh Hyo Chan
• Ku Jin Ho
• Lee Byoung Hwa

Classifications

• H01F1/015

  Metals or alloys · CPC title

• H01F27/292

  Surface mounted devices · CPC title

• H01F2027/2809

  on stacked layers · CPC title

• H01F41/041

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

• H01F27/2804

  Printed windings · CPC title