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US 10,096,417 B2Granted
Common mode noise filter
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsYoshiharu Omori, Kenichi Matsushima, Ryohei Harada, Kenji Ueno, Atsushi Shinkai, Nariaki Ishida, Takeshi Ichihara
Life of this patent
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Abstract
In a common mode noise filter, first coil (12) includes first coil conductor (16) and second coil conductor (17) with spiral shapes. Second coil (13) includes third coil conductor (18) and fourth coil conductor (19) with spiral shapes. First coil conductor (16), third coil conductor (18), second coil conductor (17), and fourth coil conductor (19) are placed in this order from above. First metal layer (14) configured to be connected to a ground is provided above first coil conductor (16).
Claims16
A common mode noise filter comprising:
- first to fifth insulating layers;
- a first coil including
- a first coil conductor with a spiral shape provided on an upper surface of the first insulating layer, and
- a second coil conductor with a spiral shape provided on an upper surface of the second insulating layer, the second coil conductor being provided below the first coil conductor;
- a second coil including
- a third coil conductor with a spiral shape provided on an upper surface of the third insulating layer, and
- a fourth coil conductor with a spiral shape provided on an upper surface of the fourth insulating layer, the fourth coil conductor being provided below the third coil conductor;
- a first metal layer provided on an upper surface of the fifth insulating layer;
- first to fourth external electrodes connected to the first to fourth coil conductors, respectively;
- and
- a fifth external electrode connected to the first metal layer, the fifth external electrode being configured to be connected to a ground,
- wherein the third coil conductor is provided between the first coil conductor and the second coil conductor,
- wherein the second coil conductor is provided between the third coil conductor and the fourth coil conductor,
- wherein the first coil conductor and the third coil conductor are magnetically coupled to each other to form a first common mode filter,
- wherein the second coil conductor and the fourth coil conductor are magnetically coupled to each other to form a second common mode filter,
- wherein the first common mode filter is connected in series to the second common mode filter, and
- wherein the first metal layer is provided above the first coil conductor.
14 more elements
A common mode noise filter comprising:
- first to fifth insulating layers;
- a first coil including
- a first coil conductor with a spiral shape provided on an upper surface of the first insulating layer, and
- a second coil conductor with a spiral shape provided on an upper surface of the second insulating layer, the second coil conductor being provided below the first coil conductor;
- a second coil including
- a third coil conductor with a spiral shape provided on an upper surface of the third insulating layer, and
- a fourth coil conductor with a spiral shape provided on an upper surface of the fourth insulating layer, the fourth coil conductor being provided below the third coil conductor;
- a first metal layer provided on an upper surface of the fifth insulating layer;
- first to fourth external electrodes connected to the first to fourth coil conductors, respectively;
- and
- a fifth external electrode connected to the first metal layer, the fifth external electrode being configured to be connected to a ground,
- wherein the first coil conductor is provided between the second coil conductor and the third coil conductor,
- wherein the second coil conductor is provided between the first coil conductor and the fourth coil conductor,
- wherein the first coil conductor and the third coil conductor are magnetically coupled to each other to form a first common mode filter,
- wherein the second coil conductor and the fourth coil conductor are magnetically coupled to each other to form a second common mode filter,
- wherein the first common mode filter is connected in series to the second common mode filter, and
- wherein the first metal layer is provided above the third coil conductor.
14 more elements
Dependencies are inferred from the claim text.