Coil component and manufacturing method therefor
Disclosed herein is a coil component that includes: a coil part having a structure in which alternately stacking a plurality of conductor layers each including a spiral coil pattern and a plurality of insulating layers; a first magnetic layer disposed in an inner diameter area of the coil part, in an outside area of the coil part, and on one side in an axial direction of the coil part; and a second magnetic layer disposed on other side in the axial direction of the coil part. Each of the first and second magnetic layers comprises a composite magnetic material containing magnetic fillers and binder resin. The content of the magnetic filers in the first magnetic layer is higher than the content of the magnetic fillers in the second magnetic layer.
1 . A coil component comprising:
a coil part having a structure in which alternately stacking a plurality of conductor layers each including a spiral coil pattern and a plurality of insulating layers;
a first magnetic layer disposed in an inner diameter area of the coil part, in an outside area of the coil part, and on one side in an axial direction of the coil part;
a second magnetic layer disposed on another side in the axial direction of the coil part; and
a bump electrode connected to the coil part,
wherein each of the first and second magnetic layers comprises a composite magnetic material containing magnetic fillers and binder resin,
wherein a content of the magnetic fillers in the first magnetic layer is higher than a content of the magnetic fillers in the second magnetic layer,
wherein the bump electrode is embedded in the first magnetic layer and exposed from a first surface of the first magnetic layer on a side perpendicular to the axial direction, and
wherein a second surface of the second magnetic layer on a side perpendicular to the axial direction is smaller in surface roughness than the first surface of the first magnetic layer.
2 . A coil component comprising:
a coil part having a structure in which alternately stacking a plurality of conductor layers each including a spiral coil pattern and a plurality of insulating layers;
a first magnetic layer disposed in an inner diameter area of the coil part, in an outside area of the coil part, and on one side in an axial direction of the coil part; and
a second magnetic layer disposed on another side in the axial direction of the coil part,
wherein each of the first and second magnetic layers comprises a composite magnetic material containing magnetic fillers and binder resin,
wherein a content of the magnetic fillers in the first magnetic layer is higher than a content of the magnetic fillers in the second magnetic layer, and
wherein a material and an average particle diameter of the magnetic fillers contained in the first magnetic layer is substantially a same as a material and an average particle diameter of the magnetic fillers contained in the second magnetic layer.
3 . The coil component as claimed in claim 2 ,
wherein the first and second magnetic layers are in contact with each other, and
wherein a material of the binder resin contained in the first magnetic layer is substantially the same as a material of the binder resin contained in the second magnetic layer.
4 . The coil component as claimed in claim 2 , further comprising a bump electrode connected to the coil part,
wherein the bump electrode is embedded in the first magnetic layer and exposed from a first surface of the first magnetic layer on a side perpendicular to the axial direction.
5 . The coil component as claimed in claim 4 , wherein a second surface of the second magnetic layer on a side perpendicular to the axial direction is smaller in surface roughness than the first surface of the first magnetic layer.
6 . A coil component comprising:
a coil part having a structure in which alternately stacking a plurality of conductor layers each including a spiral coil pattern and a plurality of insulating layers;
a first magnetic layer disposed in an inner diameter area of the coil part, in an outside area of the coil part, and on one side in an axial direction of the coil part; and
a second magnetic layer disposed on another side in the axial direction of the coil part,
wherein each of the first and second magnetic layers comprises a composite magnetic material containing magnetic fillers and binder resin,
wherein a content of the magnetic fillers in the first magnetic layer is higher than a content of the magnetic fillers in the second magnetic layer,
wherein the plurality of insulating layers include a first insulating layer located closest to the another side in the axial direction of the coil part,
wherein a lower surface of the first insulating layer is in contact with the second magnetic layer, and
wherein the lower surface of the first insulating layer is roughened.
7 . The coil component as claimed in claim 6 , wherein a first contact area between the first magnetic layer disposed in the outside area of the coil part and the second magnetic layer is substantially the same as a second contact area between the first magnetic layer disposed in the inner diameter area of the coil part and the second magnetic layer.
8 . The coil component as claimed in claim 6 , wherein a first contact area between the first magnetic layer disposed in the outside area of the coil part and the second magnetic layer is larger than a second contact area between the first magnetic layer disposed in the inner diameter area of the coil part and the second magnetic layer.