Coil component and manufacturing method therefor

A coil component comprising:

• a coil part having a structure in which a plurality of conductor layers each having a coil pattern are stacked in a coil axis direction through a plurality of interlayer insulating films;
• a first magnetic layer covering the coil part in the coil axis direction;
• and
• a second magnetic layer positioned in an inner diameter area of the coil part,
• wherein the plurality of interlayer insulating films include a first interlayer insulating film positioned closest to the first magnetic layer,
• wherein the first and second magnetic layers contact each other through an opening formed in the first interlayer insulating film,
• wherein the opening has a shape whose diameter increases as a distance from an interface between the first and second magnetic layers increases,
• wherein the coil component further comprises a third magnetic layer provided in an outside area of the coil part,
• wherein the first and third magnetic layers contact each other through another opening formed in the first interlayer insulating film, and
• wherein the another opening has a shape whose diameter increases as a distance from an interface between the first and third magnetic layers increases.