JP2020136521A - Common mode noise filter - Google Patents
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- 239000004020 conductor Substances 0.000 claims abstract description 229
- 239000012212 insulator Substances 0.000 claims description 32
- 238000010030 laminating Methods 0.000 claims description 7
- 238000007667 floating Methods 0.000 abstract description 6
- 238000003475 lamination Methods 0.000 abstract 4
- 239000000696 magnetic material Substances 0.000 description 8
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 229910017518 Cu Zn Inorganic materials 0.000 description 2
- 229910017752 Cu-Zn Inorganic materials 0.000 description 2
- 229910017943 Cu—Zn Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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Abstract
Description
本発明は、デジタル機器やＡＶ機器、情報通信端末等の各種電子機器に使用される小形で薄型のコモンモードノイズフィルタに関するものである。 The present invention relates to a small and thin common mode noise filter used in various electronic devices such as digital devices, AV devices, and information communication terminals.
従来、モバイル機器においてメインＩＣとディスプレイやカメラを接続するデジタルデータ伝送規格としてｍｉｐｉ（Ｍｏｂｉｌｅ Ｉｎｄｕｓｔｒｙ Ｐｒｏｃｅｓｓｏｒ Ｉｎｔｅｒｆａｃｅ）Ｄ−ＰＨＹ規格が採用されており、２本の伝送ラインを用いた差動信号で伝送する方式が用いられている。 Conventionally, the mipi (Mobile Industry Processor Interface) D-PHY standard has been adopted as a digital data transmission standard for connecting a main IC to a display or a camera in a mobile device, and transmission is performed by a differential signal using two transmission lines. The method is used.
近年、カメラの解像度が飛躍的に高まり、更に高速な伝送方式として、３本の伝送線を用いて、送信側から各伝送線に異なる電圧を送り、受信側で各２線間の差分をとることで、３通りの差動信号を出力する方式がｍｉｐｉのＣ−ＰＨＹ規格として制定され実用化されている。 In recent years, the resolution of cameras has dramatically increased, and as a higher-speed transmission method, three transmission lines are used to send different voltages from the transmitting side to each transmission line, and the receiving side takes the difference between each two lines. As a result, a method for outputting three types of differential signals has been established and put into practical use as the C-PHY standard of mipi.
従来のＣ−ＰＨＹ規格に使用されるコモンモードノイズフィルタは、図９、図１０に示すように、複数の絶縁体層１と、３つの独立した第１〜第３のコイル２〜４を有し、第１〜第３のコイル２〜４はそれぞれ、コイル導体２ａ、２ｂ、コイル導体３ａ、３ｂ、コイル導体４ａ、４ｂ同士を電気的に接続することによって形成されていた。 The common mode noise filter used in the conventional C-PHY standard has a plurality of insulator layers 1 and three independent first to third coils 2 to 4, as shown in FIGS. 9 and 10. The first to third coils 2 to 4 were formed by electrically connecting the coil conductors 2a and 2b, the coil conductors 3a and 3b, and the coil conductors 4a and 4b, respectively.
また、第１のコイル２を構成するコイル導体２ａ、第２のコイル３を構成するコイル導体３ａ、第３のコイル４を構成するコイル導体４ａ、第１のコイル２を構成するコイル導体２ｂ、第２のコイル３を構成するコイル導体３ｂ、第３のコイル４を構成するコイル導体４ｂの順に積層していた。 Further, the coil conductor 2a forming the first coil 2, the coil conductor 3a forming the second coil 3, the coil conductor 4a forming the third coil 4, and the coil conductor 2b forming the first coil 2 The coil conductors 3b forming the second coil 3 and the coil conductors 4b forming the third coil 4 were laminated in this order.
このような構成において、コモンモードノイズが入力された場合には、第１〜第３のコイル２〜４で発生する磁束が互いに強め合い、インダクタンスとして動作することによってノイズを抑制していた。 In such a configuration, when common mode noise is input, the magnetic fluxes generated in the first to third coils 2 to 4 strengthen each other and operate as an inductance to suppress the noise.
なお、この出願の発明に関連する先行技術文献としては、例えば、特許文献１が知られている。 As a prior art document related to the invention of this application, for example, Patent Document 1 is known.
上記した従来のコモンモードノイズフィルタにおいては、第１のコイル２、第２のコイル３、第３のコイル４は、おおよそ均等な距離になるように配置、つまり、その断面は三角形の頂点に位置している。またコモンモードノイズの除去能力を向上させるためコモンモードインピーダンスを大きくするため、第１のコイル２、第２のコイル３、第３のコイル４は、コイル導体２ａ、コイル導体３ａ、コイル導体４ａがお互いに磁気結合する部分と、コイル導体２ｂ、コイル導体３ｂ、コイル導体４ｂが磁気結合される部分の２段構造になっている。 In the conventional common mode noise filter described above, the first coil 2, the second coil 3, and the third coil 4 are arranged so as to be approximately equal distances, that is, their cross sections are located at the vertices of a triangle. are doing. Further, in order to increase the common mode impedance in order to improve the ability to remove common mode noise, the coil conductor 2a, the coil conductor 3a, and the coil conductor 4a of the first coil 2, the second coil 3, and the third coil 4 are used. It has a two-stage structure consisting of a portion that is magnetically coupled to each other and a portion that magnetically couples the coil conductor 2b, the coil conductor 3b, and the coil conductor 4b.
しかし、この場合、コイル導体２ｂとコイル導体４ｂが積層方向で重なり、さらに、こ
のコイル導体２ｂとコイル導体４ａも積層方向で重なっているため、第１のコイル２と第３のコイル４との間の浮遊容量が大きくなり、これにより、高周波領域において、第１のコイル２と第３のコイル４の出力される信号から差分をとる差動信号が、他の２通り、つまり第１のコイル２と第２のコイル３および第２のコイル３と第３のコイル４から出力される差動信号に比べて劣化し、３通りの差動信号の出力特性にばらつきが生じるという課題を有していた。
However, in this case, since the coil conductor 2b and the coil conductor 4b overlap in the stacking direction, and the coil conductor 2b and the coil conductor 4a also overlap in the stacking direction, the first coil 2 and the third coil 4 The floating capacitance between them increases, and as a result, in the high frequency region, there are two other differential signals that take the difference from the outputs of the first coil 2 and the third coil 4, that is, the first coil. There is a problem that the output characteristics of the three different differential signals are different from those of the differential signals output from the second coil 3 and the second coil 3 and the second coil 3 and the third coil 4. Was there.
本発明は上記従来の課題を解決するもので、ｍｉｐｉのＣ−ＰＨＹ規格の３線式の信号線路に用いられる３つのコイル間の浮遊容量を高周波領域まで略均等にすることによって、３線間から２つの差動信号を３通り取り出す際に、３通りの差動信号の出力特性のばらつきを低減することができるコモンモードノイズフィルタを提供することを目的とするものである。 The present invention solves the above-mentioned conventional problems, and by substantially equalizing the floating capacitance between the three coils used in the 3-wire signal line of MIPI's C-PHY standard up to the high frequency region, the inter-three lines It is an object of the present invention to provide a common mode noise filter capable of reducing variations in output characteristics of the three types of differential signals when the two differential signals are taken out from the three ways.
第１の態様に係るコモンモードノイズフィルタは、複数の絶縁体層と、前記複数の絶縁体層を上下方向に積層することによって設けられた積層体と、前記複数の絶縁体層に設けられた互いに独立するスパイラル状の第１のコイル、第２のコイル、第３のコイルとを備え、前記第１のコイルは第１のコイル導体と第２のコイル導体で構成し、前記第２のコイルは第３のコイル導体と第４のコイル導体で構成し、前記第３のコイルは第５のコイル導体と第６のコイル導体で構成し、前記第１のコイル導体、前記第３のコイル導体、前記第５のコイル導体とを含む第１の積層部と、前記第２のコイル導体、前記第４のコイル導体、前記第６のコイル導体とを含み、かつ前記第１の積層部に積層方向で上方に積層された第２の積層部とを構成し、前記第２の積層部において、下から前記第２のコイル導体、前記第４のコイル導体、前記第６のコイル導体の順に積層し、前記第４のコイル導体を前記第２、第６のコイル導体と積層方向に直交する方向にずれて配置し、前記第１の積層部において、前記第１のコイル導体、前記第３のコイル導体、前記第５のコイル導体のうち最上部に前記第３のコイル導体または前記第１のコイル導体が配置されている。 The common mode noise filter according to the first aspect is provided on a plurality of insulator layers, a laminate provided by laminating the plurality of conductor layers in the vertical direction, and the plurality of conductor layers. A spiral first coil, a second coil, and a third coil that are independent of each other are provided, and the first coil is composed of a first coil conductor and a second coil conductor, and the second coil is composed of the second coil conductor. Consists of a third coil conductor and a fourth coil conductor, the third coil is composed of a fifth coil conductor and a sixth coil conductor, and the first coil conductor and the third coil conductor The first laminated portion including the fifth coil conductor, the second coil conductor, the fourth coil conductor, and the sixth coil conductor are included, and laminated on the first laminated portion. It constitutes a second laminated portion that is laminated upward in the direction, and in the second laminated portion, the second coil conductor, the fourth coil conductor, and the sixth coil conductor are laminated in this order from the bottom. Then, the fourth coil conductor is arranged so as to be offset in the direction orthogonal to the stacking direction with the second and sixth coil conductors, and in the first laminated portion, the first coil conductor and the third coil conductor are arranged. The third coil conductor or the first coil conductor is arranged at the uppermost portion of the coil conductor and the fifth coil conductor.
第２の態様に係るコモンモードノイズフィルタは、第１の態様において、前記第１の積層部において中央部に位置するコイル導体を他の２つの前記コイル導体と積層方向に直交する方向にずれて配置されている。 In the first aspect, the common mode noise filter according to the second aspect shifts the coil conductor located at the center of the first laminated portion in a direction orthogonal to the stacking direction with the other two coil conductors. Have been placed.
第３の態様に係るコモンモードノイズフィルタは、第１の態様において、前記第１の積層部において、下から前記第５のコイル導体、前記第１のコイル導体、前記第３のコイル導体の順に積層されている。 In the first aspect, the common mode noise filter according to the third aspect has the fifth coil conductor, the first coil conductor, and the third coil conductor in this order from the bottom in the first laminated portion. It is laminated.
第４の態様に係るコモンモードノイズフィルタは、第３の態様において、前記第１のコイル導体が前記第３、第５のコイル導体と積層方向に直交する方向にずれて配置されている。 In the third aspect, the common mode noise filter according to the fourth aspect is arranged so that the first coil conductor is deviated from the third and fifth coil conductors in a direction orthogonal to the stacking direction.
第５の態様に係るコモンモードノイズフィルタは、第１の態様において、前記第１の積層部において、下から前記第５のコイル導体、前記第３のコイル導体、前記第１のコイル導体の順に積層されている。 In the first aspect, the common mode noise filter according to the fifth aspect has the fifth coil conductor, the third coil conductor, and the first coil conductor in this order from the bottom in the first laminated portion. It is laminated.
本発明のコモンモードノイズフィルタは、第１のコイルを構成する第２のコイル導体と第３のコイルを構成する第５のコイル導体とが積層方向で離れて配置されているため、第１のコイルと第３のコイルの間の浮遊容量が大きくなるのを防ぐことができるため、高周波領域において３通りの差動信号の出力特性のばらつきを低減することができる。 The common mode noise filter of the present invention has a first coil because the second coil conductor forming the first coil and the fifth coil conductor forming the third coil are arranged apart from each other in the stacking direction. Since it is possible to prevent the stray capacitance between the coil and the third coil from becoming large, it is possible to reduce variations in the output characteristics of the three different differential signals in the high frequency region.
（実施の形態１）
図１は本開示の実施の形態１におけるコモンモードノイズフィルタの分解斜視図、図２は同コモンモードノイズフィルタの断面図である。
(Embodiment 1)
FIG. 1 is an exploded perspective view of the common mode noise filter according to the first embodiment of the present disclosure, and FIG. 2 is a sectional view of the common mode noise filter.
本開示の実施の形態１におけるコモンモードノイズフィルタは、図１、図２に示すように、積層方向に積層された第１〜第７の絶縁体層１１ａ〜１１ｇと、第１〜第７の絶縁体層１１ａ〜１１ｇに形成された第１のコイル１２、第２のコイル１３、第３のコイル１４とを備えている。 As shown in FIGS. 1 and 2, the common mode noise filter according to the first embodiment of the present disclosure includes the first to seventh insulator layers 11a to 11g laminated in the stacking direction, and the first to seventh insulator layers 11a to 11g. It includes a first coil 12, a second coil 13, and a third coil 14 formed in the insulator layers 11a to 11g.
また、第１のコイル１２は第１のコイル導体１２ａと第２のコイル導体１２ｂとで構成され、第２のコイル１３は第３のコイル導体１３ａと第４のコイル導体１３ｂで構成され、第３のコイル１４は第５のコイル導体１４ａと第６のコイル導体１４ｂで構成されている。 Further, the first coil 12 is composed of a first coil conductor 12a and a second coil conductor 12b, and the second coil 13 is composed of a third coil conductor 13a and a fourth coil conductor 13b. The coil 14 of 3 is composed of a fifth coil conductor 14a and a sixth coil conductor 14b.
さらに、第１のコイル導体１２ａ、第３のコイル導体１３ａ、第５のコイル導体１４ａを含む第１の積層部１５と、第２のコイル導体１２ｂ、第４のコイル導体１３ｂ、第６のコイル導体１４ｂを含み、かつ第１の積層部１５に積層方向で上方に積層された第２の積層部１６とを設けている。 Further, a first laminated portion 15 including a first coil conductor 12a, a third coil conductor 13a, and a fifth coil conductor 14a, a second coil conductor 12b, a fourth coil conductor 13b, and a sixth coil. A second laminated portion 16 that includes the conductor 14b and is laminated upward in the stacking direction is provided on the first laminated portion 15.
そして、第１の積層部１５において、下から第１のコイル導体１２ａ、第５のコイル導体１４ａ、第３のコイル導体１３ａの順に積層し、第２の積層部１６において、下から第２のコイル導体１２ｂ、第４のコイル導体１３ｂ、第６のコイル導体１４ｂの順に積層し、かつ第４のコイル導体１３ｂを第２、第６のコイル導体１２ｂ、１４ｂと積層方向に直交する方向にずれて配置している。 Then, in the first laminated portion 15, the first coil conductor 12a, the fifth coil conductor 14a, and the third coil conductor 13a are laminated in this order from the bottom, and in the second laminated portion 16, the second from the bottom is the second. The coil conductor 12b, the fourth coil conductor 13b, and the sixth coil conductor 14b are laminated in this order, and the fourth coil conductor 13b is displaced in the direction orthogonal to the stacking direction with the second and sixth coil conductors 12b and 14b. Is arranged.
上記構成において、第１〜第７の絶縁体層１１ａ〜１１ｇは、下から順に積層され、同じ厚みのシート状に形成されたＣｕ−Ｚｎフェライト、ガラスセラミック等の非磁性材料から構成されている。 In the above configuration, the first to seventh insulator layers 11a to 11g are made of non-magnetic materials such as Cu—Zn ferrite and glass ceramic, which are laminated in order from the bottom and formed in the form of sheets having the same thickness. ..
なお、第１の絶縁体層１１ａの下面、第７の絶縁体層１１ｇの上面に磁性体部を配置してもよい。前記磁性体部は、シート状に構成されたＮｉ−Ｃｕ−Ｚｎフェライト等の磁性材料からなる複数の磁性体層で構成される。 The magnetic material portion may be arranged on the lower surface of the first insulator layer 11a and the upper surface of the seventh insulator layer 11g. The magnetic material portion is composed of a plurality of magnetic material layers made of a magnetic material such as Ni-Cu-Zn ferrite formed in a sheet shape.
また、第１〜第７絶縁体層１１ａ〜１１ｇの枚数は、図１に記載の枚数に限定されない。さらに、磁性体部を、磁性体層と他の非磁性体層とを交互に積層したものとしてもよい
。
Further, the number of the first to seventh insulator layers 11a to 11g is not limited to the number shown in FIG. Further, the magnetic material portion may be formed by alternately laminating magnetic material layers and other non-magnetic material layers.
そして、第１〜第７の絶縁体層１１ａ〜１１ｇを上下方向に積層することによって積層体１７が設けられる。 Then, the laminated body 17 is provided by laminating the first to seventh insulator layers 11a to 11g in the vertical direction.
前記第１のコイル１２は、下方の第１のコイル導体１２ａと上方の第２のコイル導体１２ｂとを、第２〜第４の絶縁体層１１ｂ〜１１ｄに形成された第１のビア電極１８ａを介して電気的に接続して構成される。 In the first coil 12, the lower first coil conductor 12a and the upper second coil conductor 12b are formed on the second to fourth insulator layers 11b to 11d, and the first via electrode 18a is formed. It is configured by being electrically connected via.
前記第２のコイル１３は、下方の第３のコイル導体１３ａと上方の第４のコイル導体１３ｂとを、第４、第５の絶縁体層１１ｄ、１１ｅに形成された第２のビア電極１８ｂを介して電気的に接続して構成される。 In the second coil 13, the lower third coil conductor 13a and the upper fourth coil conductor 13b are formed on the fourth and fifth insulator layers 11d and 11e, and the second via electrode 18b is formed. It is configured by being electrically connected via.
前記第３のコイル１４は、下方の第５のコイル導体１４ａと上方の第６のコイル導体１４ｂとを、第３〜第６の絶縁体層１１ｃ〜１１ｆに形成された第３のビア電極１８ｃを介して電気的に接続して構成される。 In the third coil 14, the lower fifth coil conductor 14a and the upper sixth coil conductor 14b are formed on the third to sixth insulator layers 11c to 11f, and the third via electrode 18c is formed. It is configured by being electrically connected via.
これらの各コイル導体は、それぞれ各絶縁体層の上面に銀等の導電材料を渦巻状にめっきまたは印刷することにより設けられたものである。 Each of these coil conductors is provided by spirally plating or printing a conductive material such as silver on the upper surface of each insulator layer.
また、これらの各コイル導体の形状は、長辺と短辺を連続させて渦巻き状に１ターン以上に形成したもので、その内形と外形の輪郭が概ね矩形状をしており、配線等に用いる部分を除いた主要部である渦巻き状部分の導体幅、導体間ピッチ、導体厚み寸法などの導体パターンが同じになるように形成されている。 In addition, the shape of each of these coil conductors is such that the long side and the short side are continuous and formed in a spiral shape for one turn or more, and the contours of the inner shape and outer shape are generally rectangular, such as wiring. The conductor pattern such as the conductor width, the pitch between conductors, and the conductor thickness dimension of the spiral portion, which is the main portion excluding the portion used for the above, is formed to be the same.
なお、各コイル導体の形状において、矩形状に限定されるものではなく、内形と外形の輪郭が円形、長円形、楕円形などの形状のものでもよい。 The shape of each coil conductor is not limited to a rectangular shape, and the contours of the inner shape and the outer shape may be circular, oval, or elliptical.
そして、第１のコイル導体１２ａは第１の絶縁体層１１ａの上面に形成され、第５のコイル導体１４ａは第２の絶縁体層１１ｂの上面に形成され、第３のコイル導体１３ａは第３の絶縁体層１１ｃの上面に形成される。第１〜第３の絶縁体層１１ａ〜１１ｃと第１のコイル導体１２ａ、第５のコイル導体１４ａ、第３のコイル導体１３ａとで第１の積層部１５が構成される。 The first coil conductor 12a is formed on the upper surface of the first insulator layer 11a, the fifth coil conductor 14a is formed on the upper surface of the second insulator layer 11b, and the third coil conductor 13a is formed on the upper surface of the second insulator layer 11b. It is formed on the upper surface of the insulator layer 11c of 3. The first laminated portion 15 is composed of the first to third insulator layers 11a to 11c, the first coil conductor 12a, the fifth coil conductor 14a, and the third coil conductor 13a.
第１の積層部１５において、下から第１のコイル導体１２ａ、第５のコイル導体１４ａ、第３のコイル導体１３ａの順に積層されている。 In the first laminated portion 15, the first coil conductor 12a, the fifth coil conductor 14a, and the third coil conductor 13a are laminated in this order from the bottom.
また、第２のコイル導体１２ｂは第４の絶縁体層１１ｄの上面に形成され、第４のコイル導体１３ｂは第５の絶縁体層１１ｅの上面に形成され、第６のコイル導体１４ｂは第６の絶縁体層１１ｆの上面に形成される。第４〜第６の絶縁体層１１ｄ〜１１ｆと第２のコイル導体１２ｂ、第４のコイル導体１３ｂ、第６のコイル導体１４ｂで第２の積層部１６が構成される。 Further, the second coil conductor 12b is formed on the upper surface of the fourth insulator layer 11d, the fourth coil conductor 13b is formed on the upper surface of the fifth insulator layer 11e, and the sixth coil conductor 14b is formed on the upper surface of the fifth insulator layer 11e. It is formed on the upper surface of the insulator layer 11f of No. 6. The second laminated portion 16 is composed of the fourth to sixth insulator layers 11d to 11f, the second coil conductor 12b, the fourth coil conductor 13b, and the sixth coil conductor 14b.
第２の積層部１６において、下から第２のコイル導体１２ｂ、第４のコイル導体１３ｂ、第６のコイル導体１４ｂの順に積層されている。 In the second laminated portion 16, the second coil conductor 12b, the fourth coil conductor 13b, and the sixth coil conductor 14b are laminated in this order from the bottom.
したがって、第１の積層部１５では、下から第１のコイル１２、第３のコイル１４、第２のコイル１３の順に積層され、第２の積層部１６では、下から第１のコイル１２、第２のコイル１３、第３のコイル１４の順に積層され、第１の積層部１５と第２の積層部１６は、第２のコイル１３と第３のコイル１４の配置箇所が入れ替わっている。 Therefore, in the first laminated portion 15, the first coil 12, the third coil 14, and the second coil 13 are laminated in this order from the bottom, and in the second laminated portion 16, the first coil 12 from the bottom, The second coil 13 and the third coil 14 are laminated in this order, and the positions of the second coil 13 and the third coil 14 are interchanged in the first laminated portion 15 and the second laminated portion 16.
そして、第１の積層部１５の最上部は第３のコイル導体１３ａで、第２の積層部１６の最下部は第２のコイル導体１２ｂであり、第２のコイル導体１２ｂは第３のコイル導体１３ａと積層方向で隣接する。 The uppermost portion of the first laminated portion 15 is the third coil conductor 13a, the lowermost portion of the second laminated portion 16 is the second coil conductor 12b, and the second coil conductor 12b is the third coil. Adjacent to the conductor 13a in the stacking direction.
上記構成によって、３つの独立した第１のコイル１２、第２のコイル１３、第３のコイル１４が設けられ、第１のコイル１２と第２のコイル１３、第２のコイル１３と第３のコイル１４、第３のコイル１４と第１のコイル１２がそれぞれ互いに磁気結合する構成となっている。 With the above configuration, three independent first coils 12, a second coil 13, and a third coil 14 are provided, and the first coil 12 and the second coil 13, the second coil 13 and the third coil 14 are provided. The coil 14, the third coil 14, and the first coil 12 are respectively magnetically coupled to each other.
さらに、第１の積層部１５において、第３のコイル導体１３ａを第１、第５のコイル導体１２ａ、１４ａと積層方向に直交する方向にずれて配置し、第２の積層部１６においても上述したように、第４のコイル導体１３ｂを第２、第６のコイル導体１２ｂ、１４ｂと積層方向に直交する方向にずれて配置している。 Further, in the first laminated portion 15, the third coil conductor 13a is arranged so as to be offset in the direction orthogonal to the laminating direction with the first and fifth coil conductors 12a and 14a, and the second laminated portion 16 is also described above. As described above, the fourth coil conductor 13b is arranged so as to be offset from the second and sixth coil conductors 12b and 14b in the direction orthogonal to the stacking direction.
すなわち、第２のコイル１３を構成する第３、第４のコイル導体１３ａ、１３ｂを他のコイル導体と積層方向と直交する方向にずらして配置している。換言すれば、第２のコイル１３を構成する第３、第４のコイル導体１３ａ、１３ｂの巻き軸が他のコイル導体の巻き軸と、積層方向と直交する方向にずれている。 That is, the third and fourth coil conductors 13a and 13b constituting the second coil 13 are arranged so as to be offset in the direction orthogonal to the stacking direction with the other coil conductors. In other words, the winding axes of the third and fourth coil conductors 13a and 13b constituting the second coil 13 are deviated from the winding axes of the other coil conductors in a direction orthogonal to the stacking direction.
このように、ずれて配置すれば、各コイル導体間を概ね同じ間隔に配置することができるため、第２の積層部１６において、各コイル導体間の磁気結合のバランスを良くすることができる。 By arranging them so as to be offset in this way, the coil conductors can be arranged at substantially the same interval, so that the balance of the magnetic coupling between the coil conductors can be improved in the second laminated portion 16.
さらに、第２の積層部１６において、第２のコイル導体１２ｂ、第４のコイル導体１３ｂ、第６のコイル導体１４ｂそれぞれの巻軸を結んだ線が正三角形に相似した形状とすれば、各コイル導体間を略同じ間隔に配置することができるため、各コイル導体間の磁気結合のバランスをよくすることができ、さらに、各コイル間の磁気結合の強さを概ね同じにすることができる。 Further, if the wire connecting the winding shafts of the second coil conductor 12b, the fourth coil conductor 13b, and the sixth coil conductor 14b in the second laminated portion 16 has a shape similar to a regular triangle, each Since the coil conductors can be arranged at substantially the same spacing, the balance of the magnetic coupling between the coil conductors can be improved, and the strength of the magnetic coupling between the coils can be made substantially the same. ..
このとき、図２に示すように、積層方向の断面で見たときに、各コイル導体の内周から外周に向かう同じ巻き数部分において、内周から同じターン数の部分の第２のコイル導体１２ｂと第６のコイル導体１４ｂとを結んだ破線Ｌａと、第２のコイル導体１２ｂと第４のコイル導体１３ｂとを結んだ破線Ｌｂと、第４のコイル導体１３ｂと第６のコイル導体１４ｂとを結んだ破線Ｌｃとにより形成される三角形の形状が、正三角形に相似した形状（または巻軸を結んだ線が正三角形に相似した形状）となっている。 At this time, as shown in FIG. 2, when viewed in cross section in the stacking direction, the second coil conductor of the portion having the same number of turns from the inner circumference in the portion having the same number of turns from the inner circumference to the outer circumference of each coil conductor. A broken line La connecting the 12b and the sixth coil conductor 14b, a broken line Lb connecting the second coil conductor 12b and the fourth coil conductor 13b, a fourth coil conductor 13b and a sixth coil conductor 14b. The shape of the triangle formed by the broken line Lc connecting the and is similar to that of a regular triangle (or the line connecting the winding axes is similar to a regular triangle).
そして、第１のコイル導体１２ａと第２のコイル導体１２ｂとが、第３のコイル導体１３ａと第４のコイル導体１３ｂとが、第５のコイル導体１４ａと第６のコイル導体１４ｂとが、それぞれ積層方向から見たときに主要部である渦巻き状部分が重なるようにして配置している。 Then, the first coil conductor 12a and the second coil conductor 12b, the third coil conductor 13a and the fourth coil conductor 13b, the fifth coil conductor 14a and the sixth coil conductor 14b, The spiral portions, which are the main portions, are arranged so as to overlap each other when viewed from the stacking direction.
このようにすることにより、互いに隣に積層された各コイル導体間の距離を調整することにより、磁気結合を調整できるため、第１のコイル１２と第２のコイル１３、第２のコイル１３と第３のコイル１４、第３のコイル１４と第１のコイル１２の磁気結合のバランスをよくすることができる。 By doing so, the magnetic coupling can be adjusted by adjusting the distance between the coil conductors laminated next to each other. Therefore, the first coil 12, the second coil 13, and the second coil 13 The balance of the magnetic coupling between the third coil 14, the third coil 14 and the first coil 12 can be improved.
上記した構成により、積層体１７が形成される。また、この積層体１７の両端面には、第１〜第６のコイル導体１２ａ、１２ｂ、１３ａ、１３ｂ、１４ａ、１４ｂの端部と接続する６つの外部電極（図示せず）が設けられている。 The laminated body 17 is formed by the above-described configuration. Further, six external electrodes (not shown) connected to the ends of the first to sixth coil conductors 12a, 12b, 13a, 13b, 14a, and 14b are provided on both end faces of the laminated body 17. There is.
なお、第１の積層部１５において、第１のコイル導体１２ａを最上部に配置してもよい。第１の積層部１５の中央部に位置するコイル導体を第１の積層部１５の他のコイル導体と積層方向に直交する方向にずれて配置してもよい。 In the first laminated portion 15, the first coil conductor 12a may be arranged at the uppermost portion. The coil conductor located at the center of the first laminated portion 15 may be arranged so as to be offset in the direction orthogonal to the other coil conductors of the first laminated portion 15.
また、第１の積層部１５において、下から第５のコイル導体１４ａ、第３のコイル導体１３ａ、第１のコイル導体１２ａの順に積層してもよい。この構成により、第１のコイル１２を構成する第１のコイル導体１２ａと第２のコイル導体１２ｂを隣接させることができるため、この間の浮遊容量を減らすことができる。 Further, in the first laminated portion 15, the fifth coil conductor 14a, the third coil conductor 13a, and the first coil conductor 12a may be laminated in this order from the bottom. With this configuration, the first coil conductor 12a and the second coil conductor 12b constituting the first coil 12 can be adjacent to each other, so that the stray capacitance between them can be reduced.
本開示の実施の形態１におけるコモンモードノイズフィルタは、第１のコイル１２を構成する第２のコイル導体１２ｂと第３のコイル１４を構成する第５のコイル導体１４ａとが積層方向で離れて配置されているため、この間の浮遊容量が大きくなるのを防ぐことができる。 In the common mode noise filter according to the first embodiment of the present disclosure, the second coil conductor 12b constituting the first coil 12 and the fifth coil conductor 14a constituting the third coil 14 are separated from each other in the stacking direction. Since they are arranged, it is possible to prevent the stray capacitance during this period from becoming large.
すなわち、第１の積層部１５において、最上部は第３のコイル導体１３ａまたは第１のコイル導体１２ａとなっているため、第５のコイル導体１４ａは最上部に位置せず、これにより、第２の積層部１６で一つの第３のコイル１４（第６のコイル導体１４ｂ）と積層方向に重なる第２のコイル導体１２ｂは、積層方向で重なるもう一つの第３のコイル１４（第５のコイル導体１４ａ）との距離が離れるため、第１のコイル１２と第３のコイル１４との間の浮遊容量が小さくなる、つまり、大きくなっていた浮遊容量を低減できる。 That is, in the first laminated portion 15, since the uppermost portion is the third coil conductor 13a or the first coil conductor 12a, the fifth coil conductor 14a is not located at the uppermost portion, and thus the first The second coil conductor 12b that overlaps the one third coil 14 (sixth coil conductor 14b) in the stacking direction in the laminated portion 16 of the second pile portion 16 has another third coil 14 (fifth coil conductor 14b) that overlaps in the stacking direction. Since the distance from the coil conductor 14a) is large, the floating capacitance between the first coil 12 and the third coil 14 can be reduced, that is, the increased floating capacitance can be reduced.
これにより、第１のコイル１２、第２のコイル１３、第３のコイル１４の３つのコイルの各々の間に発生する浮遊容量を高周波領域まで略均等にすることができるため、高周波領域において、第１のコイル１２と第３のコイル１４の出力される信号から差分をとる差動信号は、他の２通り、つまり第１のコイル１２と第２のコイル１３および第２のコイル１３と第３のコイル１４から出力される差動信号と略等しくすることができ、これにより、３線間から２つの差動信号を３通り取り出す際に、３通りの差動信号の出力特性のばらつきを低減することができる。 As a result, the floating capacitance generated between each of the three coils of the first coil 12, the second coil 13, and the third coil 14 can be substantially equalized up to the high frequency region. There are two other differential signals that take the difference from the output signals of the first coil 12 and the third coil 14, that is, the first coil 12, the second coil 13, the second coil 13, and the second coil. It can be made substantially equal to the differential signal output from the coil 14 of 3, so that when two differential signals are taken out from between the three lines in three ways, the output characteristics of the three different differential signals vary. It can be reduced.
図９、図１０に示す従来の構成において、図３にコモンモードノイズの減衰周波数特性、図４に差動信号の損失周波数特性を示す。 In the conventional configuration shown in FIGS. 9 and 10, FIG. 3 shows the attenuation frequency characteristic of the common mode noise, and FIG. 4 shows the loss frequency characteristic of the differential signal.
図３、図４において、矢印が示すグラフが第１のコイル２と第３のコイル４の間の特性になる。 In FIGS. 3 and 4, the graph indicated by the arrow is the characteristic between the first coil 2 and the third coil 4.
この従来の構成においては、第１のコイル２と第３のコイル４の間に発生する浮遊容量が、他のコイル間の浮遊容量より大きくなるため、図３に示すコモンモードノイズの減衰周波数特性では高周波領域において第１のコイル２と第３のコイル４の間の特性だけが自己共振点が下がり大きく共振している。一方、図４に示す差動信号の損失周波数特性においては、第１のコイル２と第３のコイル４の間の差動損失がけが大きくなっていることがわかる。 In this conventional configuration, the stray capacitance generated between the first coil 2 and the third coil 4 is larger than the stray capacitance between the other coils. Therefore, the attenuation frequency characteristic of the common mode noise shown in FIG. Then, in the high frequency region, only the characteristic between the first coil 2 and the third coil 4 has a lower self-resonance point and resonates greatly. On the other hand, in the loss frequency characteristic of the differential signal shown in FIG. 4, it can be seen that the differential loss between the first coil 2 and the third coil 4 is large.
また、本実施の形態１の構成において、図５にコモンモードノイズの減衰周波数特性、図６に差動信号の損失周波数特性を示す。 Further, in the configuration of the first embodiment, FIG. 5 shows the attenuation frequency characteristic of the common mode noise, and FIG. 6 shows the loss frequency characteristic of the differential signal.
図５、図６から明らかなように、コモンモードノイズの自己共振周波数でのピークが全ての場合で略等しく、高周波領域での差動信号の損失についても３通りの差動出力特性のばらつきが小さくなっている。 As is clear from FIGS. 5 and 6, the peaks of the common mode noise at the self-resonant frequency are substantially equal in all cases, and there are three variations in the differential output characteristics regarding the loss of the differential signal in the high frequency region. It's getting smaller.
（実施の形態２）
図７は本開示の実施の形態２におけるコモンモードノイズフィルタの断面図である。なお、この本実施の形態２においては、上記した実施の形態１と同様の構成を有するものについては、同一符号を付しており、その説明は省略する。
(Embodiment 2)
FIG. 7 is a cross-sectional view of the common mode noise filter according to the second embodiment of the present disclosure. In the second embodiment, the same reference numerals are given to those having the same configuration as that of the first embodiment described above, and the description thereof will be omitted.
本開示の実施の形態２が上記した実施の形態１と相違する点は、図７に示すように、第１の積層部１５において、第１のコイル導体１２ａと第５のコイル導体１４ａとの配置を入れ替え、下から第５のコイル導体１４ａ、第１のコイル導体１２ａ、第３のコイル導体１３ａの順に積層した点である。 The difference between the second embodiment of the present disclosure and the first embodiment is that, as shown in FIG. 7, the first coil conductor 12a and the fifth coil conductor 14a are formed in the first laminated portion 15. The arrangement is changed, and the fifth coil conductor 14a, the first coil conductor 12a, and the third coil conductor 13a are laminated in this order from the bottom.
この構成により、第１のコイル１２を構成する第２のコイル導体１２ｂと第３のコイル１４を構成する第５のコイル導体１４ａとを積層方向でより離れて配置することができるため、この間の浮遊容量が大きくなるのを防ぐことができ、これにより、３線間から２つの差動信号を３通り取り出す際に、３通りの差動信号の出力特性のばらつきをさらに低減することができる。 With this configuration, the second coil conductor 12b forming the first coil 12 and the fifth coil conductor 14a forming the third coil 14 can be arranged more apart in the stacking direction, so that they can be arranged between them. It is possible to prevent the stray capacitance from becoming large, and thereby it is possible to further reduce the variation in the output characteristics of the three differential signals when the two differential signals are taken out from between the three wires in three ways.
また、第１のコイル導体１２ａを第３、第５のコイル導体１３ａ、１４ａと積層方向に直交する方向にずれて配置すれば、各コイル導体間を概ね同じ間隔に配置することができるため、第２の積層部１６だけでなく第１の積層部１５においても、各コイル導体間の磁気結合のバランスをよくすることができ、この結果、３線間から２つの差動信号を３通り取り出す出力の損失特性が良くなる。 Further, if the first coil conductor 12a is arranged so as to be offset from the third and fifth coil conductors 13a and 14a in the direction orthogonal to the stacking direction, the coil conductors can be arranged at substantially the same interval. Not only in the second laminated portion 16, but also in the first laminated portion 15, the balance of the magnetic coupling between the coil conductors can be improved, and as a result, two differential signals are extracted from the three wires in three ways. The output loss characteristics are improved.
このとき、さらに、第１の積層部１５においても、第１のコイル導体１２ａ、第３のコイル導体１３ａ、第５のコイル導体１４ａそれぞれの巻軸を結んだ線が正三角形に相似した形状とすれば、各コイル導体間を略同じ間隔に配置することができるため、さらに各コイル導体間の磁気結合のバランスをよくすることができる。 At this time, also in the first laminated portion 15, the wire connecting the winding shafts of the first coil conductor 12a, the third coil conductor 13a, and the fifth coil conductor 14a has a shape similar to a regular triangle. Then, since the coil conductors can be arranged at substantially the same interval, the balance of the magnetic coupling between the coil conductors can be further improved.
図８は、本開示の実施の形態２におけるコモンモードノイズフィルタの差動信号の損失周波数特性を示している。本開示の実施の形態１の図６に示される差動信号の損失周波数特性に比べて、３通りの差動出力のばらつきも少ないことに加えて、高周波での損失特性が良化していることが分かる。 FIG. 8 shows the loss frequency characteristic of the differential signal of the common mode noise filter according to the second embodiment of the present disclosure. Compared to the loss frequency characteristics of the differential signal shown in FIG. 6 of the first embodiment of the present disclosure, the three types of differential outputs have less variation, and the loss characteristics at high frequencies are improved. I understand.
なお、上記実施の形態１、２では、第１〜第６のコイル導体１２ａ、１２ｂ、１３ａ、１３ｂ、１４ａ、１４ｂをそれぞれ異なる絶縁体層に形成したが、第１の積層部１５を構成する第１、第３、第５のコイル導体１２ａ、１３ａ、１４ａのうち２つのコイル導体を同一絶縁体層上に設けてもよく、第２の積層部１６を構成する第２、第４、第６のコイル導体１２ｂ、１３ｂ、１４ｂのうち２つのコイル導体を同一絶縁体層上に設けてもよい。 In the first and second embodiments, the first to sixth coil conductors 12a, 12b, 13a, 13b, 14a, and 14b are formed in different insulator layers, but form the first laminated portion 15. Two of the first, third, and fifth coil conductors 12a, 13a, and 14a may be provided on the same insulator layer, and the second, fourth, and fourth coil conductors constituting the second laminated portion 16 may be provided. Two of the coil conductors 12b, 13b and 14b of No. 6 may be provided on the same insulator layer.
また、１つの第１の積層部１５と、１つの第２の積層部１６を上下に積層する構成としたが、第１、第２の積層部１５、１６をそれぞれ２つ以上設けて互いに積層し、各コイルを構成するコイル導体同士を接続する構成（図示していない）としてもよい。 Further, although one first laminated portion 15 and one second laminated portion 16 are vertically laminated, two or more first and second laminated portions 15 and 16 are provided and laminated to each other. However, the coil conductors constituting each coil may be connected to each other (not shown).
本発明に係るコモンモードノイズフィルタは、お互いに磁気結合する３つのコイル間で発生する浮遊容量をおおよそ均等になるようにすることによって、高周波領域において、３線間から２つの差動信号を３通り取り出す際に、３通りの差動信号の出力特性のばらつきを低減することができるという効果を有するものであり、特にデジタル機器やＡＶ機器、情報通信端末等に使用される小形で薄型のコモンモードノイズフィルタ等において有用となるものである。 The common mode noise filter according to the present invention outputs two differential signals from three lines to three in a high frequency region by making the stray capacitance generated between three coils magnetically coupled to each other approximately equal. It has the effect of reducing the variation in the output characteristics of the three differential signals when it is taken out through the street, and is a small and thin common used especially for digital equipment, AV equipment, information communication terminals, etc. It is useful in mode noise filters and the like.
１１ａ〜１１ｇ 第１の絶縁体層〜第７の絶縁体層
１２ 第１のコイル
１２ａ 第１のコイル導体
１２ｂ 第２のコイル導体
１３ 第２のコイル
１３ａ 第３のコイル導体
１３ｂ 第４のコイル導体
１４ 第３のコイル
１４ａ 第５のコイル導体
１４ｂ 第６のコイル導体
１５ 第１の積層部
１６ 第２の積層部
１７ 積層体
11a to 11g 1st insulator layer to 7th insulator layer 12 1st coil 12a 1st coil conductor 12b 2nd coil conductor 13 2nd coil 13a 3rd coil conductor 13b 4th coil conductor 14 3rd coil 14a 5th coil conductor 14b 6th coil conductor 15 1st laminated part 16 2nd laminated part 17 laminated body
Claims (5)
前記第１のコイルは第１のコイル導体と第２のコイル導体で構成し、前記第２のコイルは第３のコイル導体と第４のコイル導体で構成し、前記第３のコイルは第５のコイル導体と第６のコイル導体で構成し、
前記第１のコイル導体、前記第３のコイル導体、前記第５のコイル導体とを含む第１の積層部と、前記第２のコイル導体、前記第４のコイル導体、前記第６のコイル導体とを含み、かつ前記第１の積層部に積層方向で上方に積層された第２の積層部とを構成し、
前記第２の積層部において、下から前記第２のコイル導体、前記第４のコイル導体、前記第６のコイル導体の順に積層し、前記第４のコイル導体を前記第２、第６のコイル導体と積層方向に直交する方向にずれて配置し、
前記第１の積層部において、前記第１のコイル導体、前記第３のコイル導体、前記第５のコイル導体のうち最上部に前記第３のコイル導体または前記第１のコイル導体が配置されているコモンモードノイズフィルタ。 A plurality of insulator layers, a laminate provided by laminating the plurality of insulator layers in the vertical direction, and a spiral first coil provided on the plurality of insulator layers and independent of each other. It has 2 coils and a 3rd coil.
The first coil is composed of a first coil conductor and a second coil conductor, the second coil is composed of a third coil conductor and a fourth coil conductor, and the third coil is a fifth coil conductor. Consists of the coil conductor and the sixth coil conductor,
A first laminated portion including the first coil conductor, the third coil conductor, and the fifth coil conductor, and the second coil conductor, the fourth coil conductor, and the sixth coil conductor. And a second laminated portion that is laminated upward in the laminating direction on the first laminating portion.
In the second laminated portion, the second coil conductor, the fourth coil conductor, and the sixth coil conductor are laminated in this order from the bottom, and the fourth coil conductor is laminated with the second and sixth coils. Arranged so that they are offset in the direction perpendicular to the stacking direction with the conductor.
In the first laminated portion, the third coil conductor or the first coil conductor is arranged at the uppermost portion of the first coil conductor, the third coil conductor, and the fifth coil conductor. Common mode noise filter.
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| JP2016157917A (en) * | 2015-02-19 | 2016-09-01 | パナソニックＩｐマネジメント株式会社 | Common mode noise filter |
| JP2017117908A (en) * | 2015-12-24 | 2017-06-29 | Tdk株式会社 | Coil component and electronic circuit using the same |
| JP2017224791A (en) * | 2016-06-17 | 2017-12-21 | 太陽誘電株式会社 | Common mode choke coil |
| WO2018066405A1 (en) * | 2016-10-05 | 2018-04-12 | パナソニックＩｐマネジメント株式会社 | Common mode noise filter |
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| JP2017117908A (en) * | 2015-12-24 | 2017-06-29 | Tdk株式会社 | Coil component and electronic circuit using the same |
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