Patent ID: 6356181
Filing Date: 2002-03-12
Classification: H01F,Y10T

Abstract:
A laminated common-mode choke coil comprising:a laminated structure having a plurality of layers including a pair of magnetic substrates and a first insulating layer interposed between said pair of magnetic substrates; first and second coil electrodes disposed on separate respective layers of said laminated structure; first through fourth external electrodes located at edges of said laminated structure, said first external electrode being connected to one end of said first coil electrode, and said third external electrode being connected to one end of said second coil electrode; and first and second through-hole electrodes through which said second external electrode is connected to the other end of said first coil electrode and said fourth external electrode is connected to the other end of said second coil electrode, wherein said first and second coil electrodes are spiral in shape, and said first coil electrode extending from a connecting portion of said first external electrode and overlapping with said second coil electrode except at a position between said first and second through-hole electrodes, said first coil electrode and said second coil electrode being magnetically coupled.