Patent ID: 7362205
Filing Date: 2008-04-22
Classification: H01F,H03H

Abstract:
1. A common-mode filter comprising: a first conductor layer having a first spiral part formed so as to draw a convolution and a first lead electrode extending from one end of the first spiral part; a second conductor layer having a second spiral part formed so as to draw a convolution and a second lead electrode extending from one end of the second spiral part; and an insulating layer placed between the first and second conductor layers; wherein the first conductor layer is formed with third and fourth lead electrodes; wherein the second conductor layer is formed with a connecting conductor connecting the third lead electrode to the other end of the first spiral part; wherein the fourth lead electrode is connected to the other end of the second spiral part through a contact hole formed in the insulating layer; wherein the third lead electrode is connected to one end of the connecting conductor through a contact hole formed in the insulating layer; and wherein the other end of the connecting conductor is connected to the other end of the first spiral part through a contact hole formed in the insulating layer.