| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a magnetic field for combining coils constituting a laminated common mode choke coil with each other is interfered by another magnetic field generated in via-holes, connecting the beginning and final ends of a coil conductor to an external electrode, whereby a coupling factor becomes small. SOLUTION: In the laminated common mode choke coil with lamination coils provided in parallel in the laminate, a part for forming the via-hole connecting the beginning and final ends of a coil conductor for the laminate coil to the external electrode is constituted so that a non-magnetic material is arranged. According to this method, the strength of magnetic field generated around the via-hole is weakened whereby effect of interfering a magnetic field for combining the coils with each other can be reduced. COPYRIGHT: (C)2006,JPO&NCIPI
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