Coil electronic component

A coil electronic component:

• a body having a first surface and a second surface opposing each other, and a third and a fourth surface opposing each other and connecting the first surface and the second surface to each other;
• an insulating substrate disposed inside the body;
• first and second coil portions respectively disposed on opposing surfaces of the insulating substrate;
• a first lead-out portion disposed on the insulating substrate, connected to one end of the first coil portion, and exposed from the first surface and the third surface of the body;
• a second lead-out portion disposed on the insulating substrate, connected to one end of the second coil portion, and exposed from the second surface and the third surface of the body;
• and
• first and second external electrodes respectively covering the first and second lead-out portions,
• wherein each of the first and second external electrodes includes a first conductive layer disposed on a respective one of the first and second lead-out portions, and a second conducive layer covering the first conducive layer, and
• the first conductive layer has a concave portion on a portion of the insulating substrate exposed from the body.

A coil electronic component:

• a body having a first surface and a second surface opposing each other, and a third and a fourth surface opposing each other and connecting the first surface and the second surface to each other;
• an insulating substrate disposed inside the body;
• first and second coil portions respectively disposed on opposing surfaces of the insulating substrate;
• a first lead-out portion disposed on the insulating substrate, connected to one end of the first coil portion, and exposed from the first surface and the third surface of the body;
• a second lead-out portion disposed on the insulating substrate, connected to one end of the second coil portion, and exposed from the second surface and the third surface of the body;
• first and second external electrodes respectively covering the first and second lead-out portions;
• and
• an oxide covering portions of the body.