Multilayer seed pattern inductor, manufacturing method thereof, and board having the same

1. A multilayer seed pattern inductor comprising:

a magnetic body containing a magnetic material; and

an internal coil part encapsulated in the magnetic body,

wherein the internal coil part includes a seed pattern and a first surface plating layer disposed on the seed pattern,

wherein the seed pattern comprises a plurality of layers,

wherein each of the plurality of layers of the seed pattern is in contact with the first surface plating layer and is embedded in the first surface plating layer, and

wherein the internal coil part further includes a second surface plating layer disposed at least on an upper surface of the first surface plating layer, the upper surface of the first surface plating layer connecting opposite side surfaces of the first surface plating layer.

2. The multilayer seed pattern inductor of claim 1 , wherein the plurality of layers of the seed pattern include a first seed pattern layer and a second seed pattern layer disposed on an upper surface of the first seed pattern.

3. The multilayer seed pattern inductor of claim 1 , wherein an overall thickness of the seed pattern is at least 100 micrometers (μm).

4. A multilayer seed pattern inductor, comprising:

a magnetic body containing a magnetic material; and

an internal coil part encapsulated in the magnetic body,

wherein the internal coil part includes a seed pattern and a surface plating layer disposed on the seed pattern,

wherein the seed pattern comprises two or more layers, and

wherein a thickness of the seed pattern is equal to 70% or more of an overall thickness of the internal coil part.

5. The multilayer seed pattern inductor of claim 1 , wherein a cross section of the seed pattern taken in a thickness direction of the seed pattern has a rectangular shape.

6. The multilayer seed pattern inductor of claim 1 , wherein the first surface plating layer has a shape corresponding to the first surface plating layer being grown in a width direction of the first surface plating layer and a thickness direction of the first surface plating layer.

7. The multilayer seed pattern inductor of claim 1 , further comprising a thin film conductor layer disposed on a lower surface of a lowermost one of plurality of layers of the seed pattern.

8. The multilayer seed pattern inductor of claim 1 , wherein the magnetic body contains magnetic metal powder and a thermosetting resin.

9. A multilayer seed pattern inductor comprising:

a magnetic body containing a magnetic material;

a first internal coil part and a second internal coil part encapsulated in the magnetic body, wherein the first internal coil part and the second internal coil part are disposed on opposing surfaces of an insulating substrate, each of the first and second internal coil parts comprises two or more seed pattern layers, and the two or more seed pattern layers are stacked one on top of the other in a direction perpendicular to the opposing surfaces of the insulating substrate;

a first surface plating layer being in contact with each of the two or more seed pattern layer and embedding the two or more seed pattern layers;

a second surface plating layer disposed at least on an upper surface of the first surface plating layer, the upper surface of the first surface plating layer connecting opposite side surfaces of the first surface plating layer; and

first and second external electrodes disposed on opposing sides of the magnetic body.

10. The multilayer seed pattern inductor of claim 9 , wherein the first internal coil part is in direct, physical contact with the first external electrode, and the second internal coil part is in direct, physical contact with the second external electrode.

11. The multilayer seed pattern inductor of claim 9 , wherein a cross section of the two or more seed pattern layers taken in a thickness direction of the seed pattern layers has a rectangular shape.

12. A multilayer seed pattern inductor comprising:

a magnetic body containing a magnetic material;

a first internal coil part and a second internal coil part encapsulated in the magnetic body,

wherein the first internal coil part and the second internal coil part are disposed on opposing surfaces of an insulating substrate, each of the first and second internal coil parts comprises an opening in a central portion of the internal coil parts, the insulating substrate comprises a through hole corresponding to the openings in the central portions of the internal coil parts, each of the first and second internal coil parts comprises two or more seed pattern layers, and the two or more seed pattern layers are stacked one on top of the other in a direction perpendicular to the opposing surfaces of the insulating substrate;

a surface plating layer coating the two or more seed pattern layers; and

a magnetic material filling the openings in the central portions of the internal coil parts and the through hole in the insulating substrate,

wherein in each of the first internal coil part and the second internal coil part, a thickness of the two or more seed pattern layers is equal to 70% or more of an overall thickness of the each of the first internal coil part and the second internal coil part.

13. The multilayer seed pattern inductor of claim 12 , wherein a cross section of the two or more seed pattern layers taken in a thickness direction of the seed pattern layers has a rectangular shape.

14. The multilayer seed patter inductor of claim 12 , wherein the two or more seed pattern layers have a same thickness in the direction perpendicular to the opposing surfaces of the insulating substrate.

15. The multilayer seed pattern inductor of claim 12 , further comprising an insulating layer disposed on the surface plating layer.

16. The multilayer seed pattern inductor of claim 12 , wherein a thickness of the surface plating layer on an uppermost surface of the two or more seed pattern layers in the direction perpendicular to the opposing surfaces of the insulating substrate is equal to a thickness of the surface plating layer along a side surface of the seed pattern layers in direction parallel to the opposing surfaces of the insulating substrate.

17. The multilayer seed pattern inductor of claim 12 , wherein a thickness of the surface plating layer on an uppermost surface of the two or more seed pattern layers in the direction perpendicular to the opposing surfaces of the insulating substrate is greater than a thickness of the surface plating layer along a side surface of the seed pattern layers in direction parallel to the opposing surfaces of the insulating substrate.

18. The multilayer seed pattern inductor of claim 9 , wherein a thickness of the first surface plating layer on an uppermost surface of the two or more seed pattern layers in the direction perpendicular to the opposing surfaces of the insulating substrate is equal to a thickness of the first surface plating layer along a side surface of the seed pattern layers in direction parallel to the opposing surfaces of the insulating substrate.

19. The multilayer seed pattern inductor of claim 18 , wherein a thickness of the second surface plating layer on an uppermost surface of the two or more seed pattern layers in the direction perpendicular to the opposing surfaces of the insulating substrate is greater than a thickness of the second surface plating layer along a side surface of the seed pattern layers in direction parallel to the opposing surfaces of the insulating substrate.

20. The multilayer seed pattern inductor of claim 4 , wherein the overall thickness of the seed pattern is at least 100 micrometers (μm).

21. The multilayer seed pattern inductor of claim 4 , wherein a cross section of the seed pattern taken in a thickness direction of the seed pattern has a rectangular shape.

22. The multilayer seed pattern inductor of claim 4 , wherein the surface plating layer coats the seed pattern.

23. The multilayer seed pattern inductor of claim 4 , further comprising a thin film conductor layer disposed on a lower surface of the seed pattern.

24. The multilayer seed pattern inductor of claim 4 , wherein the magnetic body contains magnetic metal powder and a thermosetting resin.