Patent ID: 7446632
Filing Date: 2008-11-04
Classification: H01F,H03H

Abstract:
1. A common mode choke coil comprising: a laminate structure comprising a plurality of insulating layers, a first coil element, and a second coil element, first, second, third, and fourth external electrodes formed on side surfaces of the laminated structure; a first magnetic member disposed on a surface of the laminated structure perpendicular to a laminating direction; a second magnetic member disposed on another surface of the laminated structure perpendicular to the laminating direction; first and second lead-out parts disposed between two of the insulating layers adjacent to each other on a side of the first coil element opposite the second coil element; and third and fourth lead-out parts disposed between another two of the insulating layers adjacent to each other on a side of the second coil element opposite the first coil element; wherein the insulating layer interposed between the first and second coil patterns and the first and second lead-out parts has a first through-hole and a second through-hole formed therethrough, the insulating layer interposed between the third and fourth coil patterns and the third and fourth lead-out parts has a third through-hole and a fourth through-hole formed therethrough, one end of the first lead-out portion leads out to the side surface, where the first external electrode is formed, of the laminated structure and is connected to the first external electrode, while another end of the first lead-out portion is connected to one of the first ends through the first through-hole formed in the insulating layer between one of the first ends and the first lead-out portion, one end of the second lead-out portion leads out to the side surface, where the second external electrode is formed, of the laminated structure and is connected to the second external electrode, while another end of the second lead-out portion is connected to one of the second ends through the second through-hole formed in the insulating layer between one of the second ends and the second lead-out part, one end of the third lead-out portion leads out to the side surface, where the third external electrode is formed, of the laminated structure and is connected to the third external electrode, while another end of the third lead-out portion is connected to one of the third ends through the third through-hole formed in the insulating layer between one of the third ends and the third lead-out part, and one end of the fourth lead-out portion leads out to the side surface, where the fourth external electrode is formed, of the laminated structure and is connected to the fourth external electrode, while another end of the fourth lead-out portion is connected to one of the fourth ends through the fourth through-hole formed in the insulating layer between one of the fourth ends and the fourth lead-out part.