Patent ID: 6535095
Filing Date: 2003-03-18
Classification: H01F

Abstract:
A wound type common mode choke coil, comprising:a magnetic core having a square collar portion respectively at both ends of a winding core and a groove portion around the circumferential surface of each collar portion from said winding core side to the end face side of the collar portion; a plurality of first electrode layers disposed respectively separately at least around the circumferential surface of each collar potion of said magnetic core; a pair of coil conductors wound around the winding core portion of said magnetic core and whose respective terminals are conductively connected to said first electrode layer of said collar portion; a non-magnetic first insulation coating layer disposed so as to integrally coat the outer circumference of the pair of coil conductors wound around the winding core portion of said magnetic core; a second insulation coating layer armored to the whole outer circumference of said first insulation coating layer containing magnetic powder of said winding core portion, and disposed according to the square shape of the collar portion from a concave area between both collar portions to the groove portion of each collar portion of said magnetic core; and a second electrode layer coating from the groove portion on which said second insulation coating layer of the circumferential surface of each collar portion of said magnetic core is disposed to said first electrode layer.