Coil electronic component
A coil electronic component includes a body including magnetic particles and an insulating resin, and a coil portion disposed within the body. The body has a multilayer structure including a core portion covering the coil portion and a cover portion covering the core portion. The magnetic particles included in the core portion have a distribution of a particle size having a D 50 of 3.5 μm or less.
1. A coil electronic component comprising:
a body including magnetic particles and an insulating resin; and
a coil portion disposed within the body,
wherein the body has a multilayer structure including a core portion covering the coil portion and a cover portion covering the core portion,
wherein the magnetic particles included in the core portion have a distribution of a particle size having a D 50 of 3.5 μm or less,
wherein the core portion comprises at least three kinds of magnetic sheets having different thicknesses, and
wherein a central layer of the at least three kinds of magnetic sheets in a center of the core portion and a magnetic sheet of the cover portion are thinner than the at least three kinds of magnetic sheets other than the central layer.
2. The coil electronic component of claim 1 , wherein the core portion and the cover portion form a discontinuous interface.
3. The coil electronic component of claim 1 , wherein the magnetic particles included in the cover portion have a D 50 of 3.5 μm or less.
4. The coil electronic component of claim 1 , wherein the core portion has a thickness in a range from 10 μm to 80 μm, inclusive.
5. The coil electronic component of claim 1 , wherein a thickness of the cover portion is in a range from 10 μm to 80 μm, inclusive.
6. The coil electronic component of claim 4 , wherein the core portion is provided with three or more kinds of magnetic sheets having different thicknesses laminated therein.
7. The coil electronic component of claim 1 , wherein a magnetic saturation magnetization (Ms) value of the core portion is 200 emu/g or more.
8. The coil electronic component of claim 1 , wherein the magnetic particles included in the core portion are carbonyl iron powder (CIP).
9. A coil electronic component comprising:
a coil portion; and
a body enclosing the coil portion and comprising:
a core portion comprising carbonyl iron powder and an insulating resin, and
a cover portion disposed over the core portion and having a discontinuous interface with the core portion,
wherein the core portion comprises at least three kinds of magnetic sheets having different thicknesses, and
wherein a central layer of the at least three kinds of magnetic sheets in a center of the core portion and a magnetic sheet of the cover portion are thinner than the at least three kinds of magnetic sheets other than the central layer.
10. The coil electronic component of claim 9 , wherein the cover portion comprises magnetic particles and an insulating resin.
11. The coil electronic component of claim 10 , wherein the magnetic particles of the cover portion have a D 50 of 3.5 μm or less.
12. The coil electronic component of claim 1 , wherein all of the magnetic particles included in the core portion have the distribution of a particle size having a D 50 of 3.5 μm or less.
13. A coil electronic component comprising:
a coil portion; and
a body enclosing the coil portion and comprising:
a core portion comprising carbonyl iron powder and an insulating resin, and
a cover portion disposed over the core portion and having a discontinuous interface with the core portion,
wherein all magnetic particles included in the core portion have the distribution of a particle size having a D 50 of 3.5 μm or less,
wherein the core portion comprises at least three kinds of magnetic sheets having different thicknesses, and
wherein a central layer of the at least three kinds of magnetic sheets in a center of the core portion and a magnetic sheet of the cover portion are thinner than the at least three kinds of magnetic sheets other than the central layer.
14. The coil electronic component of claim 9 , wherein magnetic particles of the core portion have a D 50 of 3.5 μm or less, and
wherein the core portion has a thickness in a range from 10 μm to 80 μm, inclusive.