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Common mode noise filter

A common mode noise and filter technology, which is applied in the field of small-scale laminated common mode noise filters, and can solve problems such as common mode component impedance

Active Publication Date: 2009-11-11
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This may create a gap around the magnetic portion 505 and thus reduce the magnetic field between the coils 502 and 503, preventing the coils 502 and 503 from having a large impedance to the common mode component

Method used

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  • Common mode noise filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] figure 1is an exploded perspective view of the common mode noise filter 101 according to Exemplary Embodiment 1 of the present invention. The common mode noise filter 101 includes: the conductor 12 provided on the upper surface 11A of the insulating layer 11, the insulating layer 13 provided on the upper surface 12C of the conductor 12, the spiral conductor provided on the upper surface 13A of the insulating layer 13 14. The insulating layer 15 disposed on the upper surface 14C of the conductor 14, the spiral conductor 16 disposed on the upper surface 15A of the insulating layer 15, the insulating layer 17 disposed on the upper surface 16C of the conductor 16, the insulating layer disposed on the insulating layer conductor 18 on upper surface 17A of conductor 17 , and insulating layer 19 provided on upper surface 18C of conductor 18 . Therefore, the lower surface 13B of the insulating layer 13 is located on the upper surface 12C of the conductor 12 . Lower surface 15...

Embodiment 2

[0099] Figure 7 is an exploded perspective view of the common mode noise filter 1501 according to Exemplary Embodiment 2 of the present invention. The common mode noise filter 1501 includes a conductor 512 provided on an upper surface 511A of an insulating layer 511, an insulating layer 513 provided on an upper surface 512C of the conductor 512, and a spiral conductor 514 provided on an upper surface 513A of the insulating layer 513. , the insulating layer 515 disposed on the upper surface 514C of the conductor 514, the spiral conductor 516 disposed on the upper surface 515A of the insulating layer 515, the insulating layer 517 disposed on the upper surface 516C of the conductor 516, the insulating layer 517 disposed on the insulating layer 517 The conductor 518 on the upper surface 517A of the conductor 518 and the insulating layer 519 provided on the upper surface 518C of the conductor 518 . Conductor 514 is connected to conductor 512 , and conductor 518 is connected to co...

Embodiment 3

[0136] Figure 13 is an exploded perspective view of the common mode noise filter 1503 according to Exemplary Embodiment 3 of the present invention. The same parts as in Embodiment 2 are denoted by the same reference numerals, and description thereof will not be repeated.

[0137] The filter 1503 includes a lead electrode 5528 provided on the upper surface 511A of the insulating layer 511, instead of Figure 7 The lead electrode 528 shown in , wherein the lead electrode 523 is disposed on the upper surface 511A of the insulating layer 511 . The via electrodes 527A and 527B are respectively disposed on the insulating layers 515 and 513 . The conductor 5518 and the lead electrode 5528 are provided on the upper surface 511A of the insulating layer 511 . The via electrodes 527A and 527B connect the other end 516A of the conductor 516 and the conductor 5518 together. In the filter 1502, since the lead electrodes 523 and 5528 are formed on the same surface, that is, the upper su...

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Abstract

A common mode noise filter includes a first insulating layer made of magnetic material, a first conductor on the first insulating layer, a second insulating layer located on the first conductor and made of nonmagnetic material, a second conductor having a spiral shape on the second insulating layer and connected with the first conductor, a third insulating layer located on the second conductor and made of nonmagnetic material, a third conductor having a spiral shape provided on the third insulating layer, a fourth insulating layer located on the third conductor and made of nonmagnetic material, a fourth conductor connected with the third conductor, a fifth insulating layer provided on the fourth conductor and made of magnetic material. The first conductor and the second conductor provide a first coil. The third conductor and the fourth conductor provide a second coil. The third insulating layer is thicker than the second insulating layer and the fourth insulating layer. This filter can increase impedance of the first and second coils against common mode components.

Description

technical field [0001] The present invention relates to a small-sized laminated common-mode noise filter used in various electronic equipment. Background technique [0002] Figure 16 It is an exploded perspective view of the conventional common mode noise filter 1001 disclosed in the present Patent Laid-Open Publication No. 2000-190410. Metal-containing spiral conductors 2A, 2B, 3A, and 3B are provided on the upper surfaces of the insulating layers 1A to 1D, respectively. Conductors 2A and 2B are connected to each other via via electrode 4A, thereby forming coil 2 . Conductors 3A and 3B are connected to each other via via electrode 4B, thereby forming coil 3 . On the lower surface of the insulating layer 1A and on the upper surface of the conductor 3B, insulating layers 5 made of a magnetic material are provided, respectively. The insulating layers 1B to 1D are made of non-magnetic material. The insulating layer 1A and the insulating layer 5 are made of a magnetic mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F17/00H01F17/04H03H7/09
Inventor 新海淳千叶博伸中山祥吾田中秀树
Owner PANASONIC CORP