COMMON MODE NOISE FILTER

To provide a common mode noise filter capable of adjusting a frequency as an attenuation pole to a common mode noise, while preventing deterioration of a loss characteristic to a differential mode.SOLUTION: A common mode noise filter comprises: insulation body layers 11a to 11e; a first coil 14 composed of a first spiral-like conductor 12 and a second spiral-like conductor 13; and a second coil 17 composed of a third spiral-like conductor 15 and a fourth spiral-like conductor 16. The third spiral-like conductor 15 and the fourth spiral-like conductor 16 constructing the second coil 17 are laminated between the first spiral-like conductor 12 and the second spiral-like conductor 13 constructing the first coil 14, and a distance between the third spiral-like conductor 15 and the fourth spiral-like conductor 16 is smaller than the distance between the first spiral-like conductor 12 and the third spiral-like conductor 15, and the distance the second spiral-like conductor 13 and the fourth spiral-like conductor 16.SELECTED DRAWING: Figure 1 【課題】本発明は、差動モードに対する損失特性が劣化するのを防止しつつ、コモンモードノイズに対する減衰極となる周波数を調整できるコモンモードノイズフィルタを提供する。【解決手段】本発明のコモンモードノイズフィルタは、絶縁体層１１ａ〜１１ｅと、第１の渦巻き状導体１２および第２の渦巻き状導体１３からなる第１のコイル１４と、第３の渦巻き状導体１５および第４の渦巻き状導体１６からなる第２のコイル１７とを備える。第１のコイル１４を構成する第１の渦巻き状導体１２と第２の渦巻き状導体１３との間に、第２のコイル１７を構成する第３の渦巻き状導体１５、第４の渦巻き状導体１６が積層され、第３の渦巻き状導体１５と第４の渦巻き状導体１６との間の距離が、第１の渦巻き状導体１２と第３の渦巻き状導体１５との間の距離、第２の渦巻き状導体１３と第４の渦巻き状導体１６との間の距離より小さい。【選択図】図１