Common mode filter with multi-spiral layer structure and method of manufacturing the same
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United States of America Patent
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Mar 24, 2015
Grant Date -
Mar 28, 2013
app pub date -
Sep 7, 2012
filing date -
Sep 23, 2011
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Abstract
A common mode filter includes a first coil, a second coil, a first insulating layer separating the first coil from the second coil, a third coil serially connected with the first coil, a second insulating layer separating the second coil from the third coil, a fourth coil serially connected with the second coil, and a third insulating layer separating the third coil from the fourth coil. The second coil is between the first and third coils, and the third coil is between the second and fourth coils. At least one of the first insulating layer, the second insulating layer and the third insulating layer may include magnetic material.
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