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Title:
COMMON MODE NOISE FILTER
Document Type and Number:
WIPO Patent Application WO/2012/039297
Kind Code:
A1
Abstract:
[Problem] To provide a common mode noise filter capable of preventing cracks from occurring in two magnetic body parts between which a nonmagnetic body part is sandwiched, and capable of suppressing degradation of the filter characteristic due to said cracks. [Solution] The filter main body (11) of a common mode noise filter is equipped with a nonmagnetic body part (12); a first magnetic body part (13) and a second magnetic body part (14) between which the nonmagnetic body part (12) is sandwiched; and a planar first coil conductor part (18) and second coil conductor part (19) embedded in the nonmagnetic body part (12) so as to be positioned on the first magnetic body part side and the second magnetic body part side of the nonmagnetic body part (12), facing one another in a noncontact state. In addition, the filter main body is equipped with a nonmagnetic first protective part (15) and second protective part (16), which comprise a nonmagnetic material having higher strength than the first magnetic body part (13) and the second magnetic body part (14), and are positioned at the outermost sides of the filter main body (11), and between which the first magnetic body part (13) and the second magnetic body part (14) are sandwiched.

Inventors:
MOTOMIYA YOSHIYUKI (JP)
TAKETOMI KOJI (JP)
NOGI KENICHIRO (JP)
TAKAHASHI TAKUMI (JP)
KAYAHARA KATUYUKI (JP)
Application Number:
JP2011/070555
Publication Date:
March 29, 2012
Filing Date:
September 09, 2011
Export Citation:
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Assignee:
TAIYO YUDEN KK (?1100005, JP)
MOTOMIYA YOSHIYUKI (JP)
TAKETOMI KOJI (JP)
NOGI KENICHIRO (JP)
TAKAHASHI TAKUMI (JP)
KAYAHARA KATUYUKI (JP)
International Classes:
H01F17/00; H01F27/02
Foreign References:
JP2006319009A2006-11-24
JP2005340611A2005-12-08
JP2001160510A2001-06-12
JP2010177380A2010-08-12
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Claims: