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Title:
COMMON MODE NOISE FILTER AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/142562
Kind Code:
A1
Abstract:
This common mode noise filter comprises a first magnetic body layer, a non-magnetic body part layered on the upper surface of the first magnetic body layer, a coil embedded in the non-magnetic body part, a second magnetic body layer layered on the upper surface of the non-magnetic body part, and a magnetic body part traversing the non-magnetic body part and connected to the first and the second magnetic body layers. The coil is wound around in such a manner as to surround the magnetic body part. The density of the magnetic body part is higher than the densities of the first and the second magnetic body layers. Alternatively, the porosity of the magnetic body part is lower than the porosities of the first and the second magnetic body layers. This common mode noise filter is capable of improving a common mode noise elimination function.

Inventors:
SASAKI Akira
Application Number:
JP2018/046003
Publication Date:
July 25, 2019
Filing Date:
December 14, 2018
Export Citation:
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Assignee:
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. (1-61, Shiromi 2-chome Chuo-ku, Osaka-sh, Osaka 07, 〒5406207, JP)
International Classes:
H01F17/00; H01F17/04; H01F37/00
Foreign References:
JP2016213333A2016-12-15
JPH1045478A1998-02-17
JP2006196812A2006-07-27
JP2017208525A2017-11-24
JP2016096259A2016-05-26
Attorney, Agent or Firm:
KAMATA Kenji et al. (1-61, Shiromi 2-chome, Chuo-ku, Osaka-sh, Osaka 07, 〒5406207, JP)
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