Coil component and board having the same
A coil component includes: a first coil and a second coil; a first magnetic region embedding the first coil therein and a second magnetic region embedding the second coil therein; a magnetic body embedding the first and second magnetic regions therein; first and second external electrodes disposed on external surfaces of the magnetic body and connected to a first end portion and a second end portion of the first coil, respectively; and third and fourth external electrodes disposed on the external surfaces of the magnetic body and connected to a first end portion and a second end portion of the second coil, respectively.
1. A coil component comprising:
a first coil and a second coil;
a first magnetic region embedding the first coil therein and a second magnetic region embedding the second coil therein;
a magnetic body embedding the first and second magnetic regions therein, wherein permeability of the first and second magnetic regions is higher than that of the magnetic body;
first and second external electrodes disposed on external surfaces of the magnetic body and connected to a first end portion and a second end portion of the first coil, respectively; and
third and fourth external electrodes disposed on the external surfaces of the magnetic body and connected to a first end portion and a second end portion of the second coil, respectively,
wherein the first magnetic region is spaced apart from the second magnetic region and the magnetic body is disposed between the first and second magnetic regions.
2. The coil component of claim 1 , wherein the first magnetic region prevents magnetic flux from the first coil from leaking to the second coil, and the second magnetic region prevents magnetic flux from the second coil from leaking to the first coil.
3. The coil component of claim 1 , wherein the first magnetic region is disposed to entirely cover external surfaces of the first coil, and the second magnetic region is disposed to entirely cover external surfaces of the second coil.
4. The coil component of claim 1 , wherein the first and second magnetic regions have higher levels of magnetic permeability than that of the magnetic body.
5. The coil component of claim 1 , wherein a first magnetic core of the first coil is filled with a magnetic material used in forming the magnetic body, and a second magnetic core of the second coil is filled with a magnetic material used in forming the magnetic body.
6. The coil component of claim 1 , wherein the first and second magnetic regions and the magnetic body contain an organic resin containing metal based soft magnetic powder particles, and the magnetic powder particles contained in the first and second magnetic regions have higher levels of magnetic permeability than that of magnetic powder particles contained in the magnetic body.
7. The coil component of claim 1 , wherein the first coil includes a first coil pattern disposed on a first surface of a first substrate and a second coil pattern disposed on a second surface of the first substrate opposing the first surface of the first substrate, the first coil pattern being connected to the first external electrode, and the second coil pattern being connected to the second external electrode, and
the second coil includes a third coil pattern disposed on a first surface of a second substrate and a fourth coil pattern disposed on a second surface of the second substrate opposing the first surface of the second substrate, the third coil pattern being connected to the third external electrode, and the fourth coil pattern being connected to the fourth external electrode.
8. The coil component of claim 1 , wherein the first and third external electrodes are input terminals, and the second and fourth external electrodes are output terminals.
9. The coil component of claim 1 , wherein the first and second magnetic regions contain an organic resin containing metal based soft magnetic powder particles.
10. The coil component of claim 9 , wherein the organic resin is a thermoplastic resin or a thermosetting resin.
11. The coil component of claim 9 , wherein the organic resin includes at least one selected from the group consisting of benzocyclobutene (BCB), an epoxy resin, a phenol resin, a vinyl ester resin, a polyimide (PI) resin, a polyvinyl benzyl ether resin, a polyethylene (PE) resin, a polypropylene (PP) resin, a polybutene resin, and a polyvinyl alcohol resin.
12. The coil component of claim 9 , wherein the metal based soft magnetic powder contains one or more selected from the group consisting of iron (Fe), silicon (Si), boron (B), chrome (Cr), aluminum (Al), copper (Cu), niobium (Nb), and nickel (Ni).
13. The coil component of claim 9 , wherein the magnetic powder particles are spherical powder particles or flake-shaped powder particles.
14. The coil component of claim 7 , wherein the first coil pattern is connected to the second coil pattern by a via penetrating through the first substrate, and the third coil pattern is connected to the fourth coil pattern by a via penetrating through the second substrate.
15. The coil component of claim 7 , wherein the first substrate includes a through-hole forming a first magnetic core of the first coil, and the second substrate includes a through-hole forming a second magnetic core of the second coil.
16. The coil component of claim 15 , wherein the through-holes formed in the first and second substrates of the first and second coils are filled with an organic resin contained in the magnetic body and contain metal based soft magnetic powder particles as a filler.
17. A board having a coil component, comprising:
a printed circuit board having a plurality of electrode pads disposed thereon; and
the coil component installed on the printed circuit board,
wherein the coil component includes:
a first coil and a second coil;
a first magnetic region embedding the first coil therein and a second magnetic region embedding the second coil therein; and
a magnetic body embedding the first and second magnetic regions therein, wherein permeability of the first and second magnetic regions is higher than that of the magnetic body,
wherein the first magnetic region is spaced apart from the second magnetic region and the magnetic body is disposed between the first and second magnetic regions.
18. The board having a coil component of claim 17 , wherein the first magnetic region prevents magnetic flux from the first coil from leaking to the second coil, and the second magnetic region prevents magnetic flux from the second coil from leaking to the first coil.
19. The board having a coil component of claim 17 , wherein the first and second magnetic regions have higher levels of magnetic permeability than that of the magnetic body.