JP2003031416A - Common mode noise filter - Google Patents
Common mode noise filterInfo
- Publication number
- JP2003031416A JP2003031416A JP2001211835A JP2001211835A JP2003031416A JP 2003031416 A JP2003031416 A JP 2003031416A JP 2001211835 A JP2001211835 A JP 2001211835A JP 2001211835 A JP2001211835 A JP 2001211835A JP 2003031416 A JP2003031416 A JP 2003031416A
- Authority
- JP
- Japan
- Prior art keywords
- conductors
- insulator layer
- conductor
- insulator
- common mode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は小型デジタル電子機
器やＯＡ機器、携帯端末等の電機製品に広く用いられて
いるコモンモードノイズフィルタに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a common mode noise filter widely used in electric products such as small digital electronic devices, OA devices, portable terminals and the like.
【０００２】[0002]
【従来の技術】従来、コモンモードノイズフィルタは特
開平５−１０１９５０号公報に記載したものが知られて
いる。2. Description of the Related Art Conventionally, as a common mode noise filter, the one described in Japanese Patent Laid-Open No. 5-101950 is known.
【０００３】図７は従来のコモンモードノイズフィルタ
を示す分解斜視図である。図７において、高透磁率磁性
体シートから構成されるコイル部１とこのコイル部１を
上下に配置した低透磁率磁性体シートから構成される引
き出し部２，３から成り、第１のコイルは導体８ａと導
体９ａがスルーホール６ａを介して電気的に接続するよ
うに形成され、同様に第２のコイルは導体８ｂと導体９
ｂがスルーホール６ｃを介して電気的に接続するように
形成される。このようにして得られたコモンモードノイ
ズフィルタでは引き出し部に発生するノーマル成分のイ
ンピーダンスが小さくなり、信号波形に対してあまり影
響を及ぼさずにコモンモードノイズを除去するコモンモ
ードノイズフィルタを得るものである。FIG. 7 is an exploded perspective view showing a conventional common mode noise filter. In FIG. 7, a coil portion 1 composed of a high-permeability magnetic material sheet and lead portions 2 and 3 composed of a low-permeability magnetic material sheet in which the coil portion 1 is arranged vertically are provided. The conductor 8a and the conductor 9a are formed so as to be electrically connected to each other through the through hole 6a. Similarly, the second coil includes the conductor 8b and the conductor 9a.
b is formed so as to be electrically connected through the through hole 6c. With the common mode noise filter obtained in this way, the impedance of the normal component generated in the extraction part becomes small, and it is possible to obtain a common mode noise filter that removes common mode noise without affecting the signal waveforms significantly. is there.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前記従
来のコモンモードノイズフィルタは大きな問題点を有し
ていた。すなわち、コモンモードノイズを除去するため
にはコイル全体のノーマル成分のインピーダンスを小さ
くすることでもコモンモードノイズを除去することが可
能であるが、前記高透磁率磁性体シートから構成される
コイル部１のコモン成分のインピーダンスを大きくする
ことで、さらにコモンモードノイズを除去することが可
能である。このため、従来のコモンモードノイズフィル
タではコモン成分のインピーダンスを大きくするため
に、１ターン未満のコイルを数十枚積層しなければなら
ずスルーホール形成およびパターン印刷工程が多く、積
層の組み合わせも複雑である。これらのことから最終の
製品となったときにオープン不良あるいはショート不良
等の特性不良の原因となり、製造上の歩留まりを低下さ
せるという問題点を有していた。However, the conventional common mode noise filter described above has a serious problem. That is, in order to remove the common mode noise, it is possible to remove the common mode noise by reducing the impedance of the normal component of the entire coil. However, the coil portion 1 composed of the high magnetic permeability magnetic sheet is used. It is possible to further remove the common mode noise by increasing the impedance of the common component of. Therefore, in the conventional common mode noise filter, in order to increase the impedance of the common component, it is necessary to stack dozens of coils with less than one turn, which requires many through-hole forming and pattern printing processes, and the combination of stacking is complicated. Is. For these reasons, there is a problem in that when it becomes a final product, it causes a characteristic defect such as an open defect or a short defect, which lowers the manufacturing yield.
【０００５】本発明は前記従来の問題点を解決するもの
で、従来のコモンモードノイズフィルタでは実現できな
かったコモンモード成分のインピーダンスを大きくする
ことができ、製造上の歩留まりを低下させることなく安
価にできるという特徴を有した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。The present invention solves the above-mentioned problems of the prior art. It is possible to increase the impedance of the common mode component, which cannot be realized by the conventional common mode noise filter, and it is inexpensive without lowering the manufacturing yield. It is an object of the present invention to provide a common mode noise filter having the feature of being capable of achieving.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するため
に、本発明は以下の構成を有する。To achieve this object, the present invention has the following constitution.
【０００７】本発明の請求項１に記載の発明は、第１乃
至第４の導体を渦巻き状とし、第１と第２の導体および
第３と第４の導体がほぼ並行に配置され、さらに、前記
第１の絶縁体層、前記第３の絶縁体層の少なくとも１つ
は他の絶縁体層の透磁率以下とした構成を有しており、
前記各導体間が狭くでき、これにより少ないスルーホー
ルで積層でき、コモンモード成分のインピーダンスを大
きくすることができる。加えて、第１と第２の導体およ
び第３と第４の導体の間に低透磁率の層を挟み込むこと
で磁界を平行２線間で強め合うことができ、コモンモー
ド成分のインピーダンスを大きくすることができる。ま
た、少ないスルーホールの構成であるため製造上の歩留
まりを低下させることなく安価にできるという作用効果
が得られる。In the invention according to claim 1 of the present invention, the first to fourth conductors are spiral-shaped, and the first and second conductors and the third and fourth conductors are arranged substantially in parallel, and At least one of the first insulator layer and the third insulator layer has a structure in which the magnetic permeability is equal to or less than that of another insulator layer,
The space between the conductors can be made narrower, so that the conductors can be stacked with a small number of through holes, and the impedance of the common mode component can be increased. In addition, by sandwiching the layer of low magnetic permeability between the first and second conductors and the third and fourth conductors, the magnetic fields can be strengthened between the two parallel lines, and the impedance of the common mode component can be increased. can do. Further, since the structure has a small number of through holes, it is possible to obtain an effect that the manufacturing yield can be reduced and the cost can be reduced.
【０００８】本発明の請求項２に記載の発明は、第１乃
至第４の導体を渦巻き状とし、第１と第２の導体および
第３と第４の導体がほぼ並行に配置され、さらに、少な
くとも前記導体間に配置された絶縁体の透磁率が他の絶
縁体層以下としたことで、前記各導体間を狭くすること
ができ、これにより少ないスルーホールで積層でき、コ
モンモード成分のインピーダンスを大きくすることがで
きる。加えて、並行した２線間に磁界を形成し難くする
ことでコモンモード成分のインピーダンスを大きくする
ことができる。また少ないスルーホールの構成であるの
で製造上の歩留まりを低下させることなく安価にできる
という作用効果が得られる。According to a second aspect of the present invention, the first to fourth conductors have a spiral shape, and the first and second conductors and the third and fourth conductors are arranged substantially parallel to each other. Since the magnetic permeability of the insulator disposed at least between the conductors is equal to or less than that of the other insulator layers, it is possible to narrow the space between the conductors, and thus it is possible to stack with a small number of through holes and to reduce the common mode component. The impedance can be increased. In addition, it is possible to increase the impedance of the common mode component by making it difficult to form a magnetic field between two parallel lines. Further, since the structure has a small number of through holes, it is possible to obtain an effect that the cost can be reduced without lowering the manufacturing yield.
【０００９】本発明の請求項３に記載の発明は、第１乃
至第４の導体を渦巻き状とし、第１と第２の導体および
第３と第４の導体がほぼ並行に配置され、さらに、少な
くとも一方において、前記スルーホールと接続する前記
２つの導体の端部を除いて、前記２つの導体を覆うよう
に設けられた第４の絶縁体層が他の絶縁体層の透磁率以
下にすることで前記各導体間が狭くでき、これにより少
ないスルーホールで積層でき、コモンモード成分のイン
ピーダンスを大きくすることができる。加えて、第１乃
至第４の導体を透磁率の低い層で挟み込むため磁界を平
行２線間で強め合うことができ、コモンモード成分のイ
ンピーダンスを大きくすることができる。また、少ない
スルーホールの構成であるので製造上の歩留まりを低下
させることなく安価にできるという作用効果が得られ
る。According to a third aspect of the present invention, the first to fourth conductors are formed in a spiral shape, and the first and second conductors and the third and fourth conductors are arranged substantially in parallel. In at least one of the two conductors, except for the ends of the two conductors connected to the through holes, the fourth insulator layer provided so as to cover the two conductors has a magnetic permeability equal to or less than that of another insulator layer. By doing so, it is possible to narrow the space between the conductors, which allows the conductors to be stacked with a small number of through holes, and to increase the impedance of the common mode component. In addition, since the first to fourth conductors are sandwiched by the layers having low magnetic permeability, the magnetic fields can be strengthened between the two parallel lines, and the impedance of the common mode component can be increased. Further, since the structure has a small number of through holes, it is possible to obtain an operational effect that the manufacturing yield can be reduced and the manufacturing cost can be reduced.
【００１０】本発明の請求項４に記載の発明は、少なく
とも第２と第３の導体を渦巻き状とし、第２と第３の導
体が第１と第４の導体の巻き数より多くし、さらに、前
記第２乃至第４の少なくとも一つの絶縁体層が他の絶縁
体層の透磁率以下とすることで前記各導体間が狭くで
き、これにより少ないスルーホールで積層でき、コモン
モード成分のインピーダンスを大きくすることができ
る。加えて、第２の導体と第３の導体の間に透磁率の低
い層を挟み込むことで磁界を前記２導体間で強め合うこ
とができ、コモンモード成分のインピーダンスを大きく
することができる。また少ないスルーホールで構成でき
るので製造上の歩留まりを低下させることなく安価にで
きるという作用効果が得られる。According to a fourth aspect of the present invention, at least the second and third conductors have a spiral shape, and the second and third conductors have more turns than the first and fourth conductors. Further, by setting the second to fourth at least one insulator layer to have a magnetic permeability equal to or less than that of the other insulator layers, the distance between the conductors can be narrowed, and thus, it is possible to stack with a small number of through holes and to reduce the common mode component. The impedance can be increased. In addition, by sandwiching a layer having a low magnetic permeability between the second conductor and the third conductor, the magnetic field can be strengthened between the two conductors, and the impedance of the common mode component can be increased. Further, since it can be configured with a small number of through holes, there is an operational effect that the manufacturing yield can be reduced and the cost can be reduced.
【００１１】本発明の請求項５に記載の発明は、請求項
１〜４に記載の発明における低透磁率の材料にＮｉ−Ｚ
ｎ−Ｃｕ−Ｃｏ系フェライトを用いたものである。According to a fifth aspect of the present invention, the material having a low magnetic permeability in the first to fourth aspects is Ni-Z.
An n-Cu-Co type ferrite is used.
【００１２】本発明の請求項６に記載の発明は、請求項
１〜４に記載の発明における低透磁率の材料として非磁
性体を用いたものであり、これによりコモンモード成分
のインピーダンスを一層大きくすることができる。According to a sixth aspect of the present invention, a non-magnetic material is used as the low magnetic permeability material according to the first to fourth aspects of the invention, whereby the impedance of the common mode component is further improved. Can be large.
【００１３】本発明の請求項７に記載の発明は、請求項
６に記載の発明の非磁性体材料として、フォルステライ
ト系ガラス、アルミナ−ガラス系誘電体、Ｚｎ−Ｃｕ系
フェライトを用いたものである。The invention according to claim 7 of the present invention uses forsterite glass, alumina-glass dielectric, or Zn-Cu ferrite as the non-magnetic material of the invention of claim 6. Is.
【００１４】[0014]
【発明の実施の形態】（実施の形態１）以下、実施の形
態１を用いて、本発明の特に請求項１に記載の発明につ
いて説明する。BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) In the following, the invention described in claim 1 of the present invention will be described with reference to Embodiment 1.
【００１５】図１は本発明の実施の形態１におけるコモ
ンモードノイズフィルタを示す分解斜視図である。FIG. 1 is an exploded perspective view showing a common mode noise filter according to the first embodiment of the present invention.
【００１６】図１において、２１は第１の絶縁体層、２
７は第１の絶縁体層２１の上面に設けられた渦巻き状の
導体である第１の導体、２８は第１の絶縁体層２１の上
面に設けられ第１の導体２７とほぼ並行な渦巻き状に設
けられた導体である第２の導体であり、第１の導体２７
と２条渦巻きの構成となっている。In FIG. 1, 21 is a first insulator layer, 2
7 is a first conductor that is a spiral conductor provided on the upper surface of the first insulator layer 21, and 28 is a spiral that is provided on the upper surface of the first insulator layer 21 and is substantially parallel to the first conductor 27. A first conductor 27 which is a second conductor which is a conductor provided in a ring shape.
And the two-row spiral configuration.
【００１７】２２は第１の導体２７及び第２の導体２８
を挟むようにして第１の絶縁体層２１の上部に設けられ
た第２の絶縁体層、３１ａおよび３１ｂは第２の絶縁体
層２２に設けられたスルーホールであり内部には導電材
が充填されている。２９は第２の絶縁体層２２の上面に
設けられた渦巻き状の導体である第３の導体、３０は第
２の絶縁体層２２の上面に設けられ第３の導体２９とほ
ぼ並行な渦巻き状に設けられた導体である第４の導体で
あり、第３の導体２９と２条渦巻きの構成となってい
る。第３の導体２９はスルーホール３１ａを介して第１
の導体２７と、第４の導体３０はスルーホール３１ｂを
介して第２の導体２８とそれぞれ電気的に接続してい
る。尚、第１、第２、第３、第４の導体２７〜３０は印
刷法によって形成してもよいが、めっき工法によって形
成すればより高い寸法精度で細密な渦巻き形状とするこ
とが可能である。Reference numeral 22 denotes a first conductor 27 and a second conductor 28.
The second insulator layers 31a and 31b provided on top of the first insulator layer 21 so as to sandwich them are through holes provided in the second insulator layer 22 and are filled with a conductive material inside. ing. 29 is a third conductor that is a spiral conductor provided on the upper surface of the second insulator layer 22, and 30 is a spiral that is provided on the upper surface of the second insulator layer 22 and is substantially parallel to the third conductor 29. It is a fourth conductor which is a conductor provided in a strip shape, and has a configuration of a double spiral with the third conductor 29. The third conductor 29 is connected to the first through the through hole 31a.
The conductor 27 and the fourth conductor 30 are electrically connected to the second conductor 28 through the through holes 31b. The first, second, third, and fourth conductors 27 to 30 may be formed by a printing method, but if formed by a plating method, a fine spiral shape can be formed with higher dimensional accuracy. is there.
【００１８】ここで、第２の絶縁体層２２は第１の絶縁
体層２１および第３の絶縁体層２３よりも低い透磁率の
ものを使用している。Here, the second insulating layer 22 has a magnetic permeability lower than those of the first insulating layer 21 and the third insulating layer 23.
【００１９】図２は、本発明の実施の形態１におけるコ
モンモードノイズフィルタの斜視図である。３３はコモ
ンモードノイズフィルタであり、３２は４個の外部電極
であり、第１、第２、第３、第４の導体２７〜３０のい
ずれか一つとそれぞれ電気的に接続している。FIG. 2 is a perspective view of the common mode noise filter according to the first embodiment of the present invention. Reference numeral 33 is a common mode noise filter, and 32 is four external electrodes, which are electrically connected to any one of the first, second, third, and fourth conductors 27 to 30, respectively.
【００２０】上記したように本実施の形態によれば、第
１の導体２７乃至第４の導体３０を渦巻き状とし、第１
の導体２７と第２の導体２８および第３の導体２９と第
４の導体３０はほぼ並行に配置されることにより、１つ
の絶縁体層に設けられた渦巻き状の各導体間の距離を短
くでき、さらに一層あたりの磁路を渦巻き状とすること
で長くでき、これにより各導体で発生し互いに影響を及
ぼし合う磁界が強くなり、コモンモード成分のインピー
ダンスを大きくすることができる。加えて、スルーホー
ル３１を有する第２の絶縁体層２２の透磁率を他の絶縁
体層の透磁率以下とすることにより、第１の導体２７と
第２の導体２８の導体間および第３の導体２９と第４の
導体３０の導体間を低透磁率の第２の絶縁体層２２で挟
む構造となり、これらの導体で発生する磁界をより強く
でき、これらの結果、効率的にコモンモードのノイズが
抑制できるという効果が得られる。As described above, according to the present embodiment, the first conductor 27 to the fourth conductor 30 are spiral-shaped, and
The conductor 27 and the second conductor 28, and the third conductor 29 and the fourth conductor 30 are arranged substantially parallel to each other, so that the distance between the spiral conductors provided in one insulator layer is shortened. It is possible to further increase the length by making the magnetic path per layer spiral, and this makes it possible to increase the magnetic fields generated in the conductors and affecting each other, thereby increasing the impedance of the common mode component. In addition, by setting the magnetic permeability of the second insulator layer 22 having the through holes 31 to be equal to or less than the magnetic permeability of the other insulator layers, the conductors between the first conductor 27 and the second conductor 28 and the third conductor 28 can be formed. The conductor 29 and the fourth conductor 30 are sandwiched between the second insulator layers 22 having a low magnetic permeability, and the magnetic field generated by these conductors can be made stronger, resulting in efficient common mode. The effect of suppressing the noise can be obtained.
【００２１】また、第１の導体２７から第４の導体３０
を挟むように配置される第１の絶縁体層２１および第３
の絶縁体層２３の透磁率を低くすることでより一層の効
果が得られる。Further, the first conductor 27 to the fourth conductor 30
A first insulator layer 21 and a third insulator layer 21 arranged so as to sandwich
Further effects can be obtained by lowering the magnetic permeability of the insulating layer 23.
【００２２】なお、前記各絶縁体層および低透磁率の絶
縁体層は図２に示すように一体焼結されて得られる。こ
の低透磁率の絶縁体層である第２の絶縁体層２２には、
Ｎｉ−Ｚｎ−Ｃｕ−Ｃｏ系フェライトを用いることがで
きる。又、非磁性体を用いると一層の効果を得ることが
でき、その材料としては、フォルステライト系ガラス、
アルミナ−ガラス系誘電体、Ｚｎ−Ｃｕ系フェライトが
好適である。The insulating layers and the low-permeability insulating layers are integrally sintered as shown in FIG. The second insulator layer 22, which is an insulator layer having a low magnetic permeability, includes
Ni-Zn-Cu-Co type ferrite can be used. Further, when a non-magnetic material is used, a further effect can be obtained, and the material is forsterite glass,
Alumina-glass based dielectrics and Zn-Cu based ferrites are preferred.
【００２３】（実施の形態２）以下、本発明の実施の形
態２を用いて本発明の特に請求項２に記載の発明につい
て説明する。(Embodiment 2) The invention according to claim 2 of the present invention will be described below with reference to Embodiment 2 of the present invention.
【００２４】図３は本発明の実施の形態２におけるコモ
ンモードノイズフィルタの分解斜視図、図４は同実施の
形態におけるコモンモードノイズフィルタの第１の絶縁
体層の上面図である。FIG. 3 is an exploded perspective view of the common mode noise filter according to the second embodiment of the present invention, and FIG. 4 is a top view of the first insulating layer of the common mode noise filter according to the second embodiment.
【００２５】図３、図４において、本実施の形態と実施
の形態１と異なる点は、第２の絶縁体層２２の透磁率が
第１の絶縁体層２１、第３の絶縁体層２３の透磁率より
低くしたというものではなく同じであり、例えば蒸着法
によって形成された第１、第２の導体２７，２８または
前記と同様に形成された第３、第４の導体２９，３０の
うち少なくとも一方において、各導体間に低透磁率の絶
縁体２４を設け、さらにこの絶縁体２４の透磁率がこの
導体の上下面の絶縁体層２１乃至２３のそれより低いも
のとした点であり、なお、実施の形態１で説明したもの
と同じものは同一符号を付し、その説明は省略する。3 and 4, the difference between the present embodiment and the first embodiment is that the second insulator layer 22 has a magnetic permeability of the first insulator layer 21 and the third insulator layer 23. Of the first and second conductors 27 and 28 formed by a vapor deposition method or the third and fourth conductors 29 and 30 formed in the same manner as described above. At least one of them is provided with an insulator 24 having a low magnetic permeability between the conductors, and the magnetic permeability of the insulator 24 is lower than that of the insulator layers 21 to 23 on the upper and lower surfaces of the conductor. The same components as those described in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.
【００２６】このような構成にすることによって、第１
の導体２７乃至第４の導体３０を渦巻き状とし、第１の
導体２７と第２の導体２８および第３の導体２９と第４
の導体３０はほぼ並行に配置されることにより、１つの
絶縁体層に設けられた渦巻き状の各導体間の距離を短く
でき、さらに一層あたりの磁路を渦巻き状とすることで
長くでき、これにより各導体で発生し互いに影響を及ぼ
し合う磁界が強くなり、コモンモード成分のインピーダ
ンスを大きくすることができる。加えて、第１の導体２
７と第２の導体２８の導体間および第３の導体２９と第
４の導体３０の導体間に低透磁率の絶縁体２４を挟む構
造となり、これらの導体で発生する磁界をより強くで
き、これらの結果、効率的にコモンモードのノイズが抑
制できるという効果が得られる。With this structure, the first
The second conductor 27 to the fourth conductor 30 are formed in a spiral shape, and the first conductor 27, the second conductor 28, the third conductor 29, and the fourth conductor
By arranging the conductors 30 of substantially parallel to each other, the distance between the spiral-shaped conductors provided in one insulator layer can be shortened, and further, by making the magnetic path per layer spiral, it can be lengthened. As a result, the magnetic fields generated in the conductors and affecting each other become stronger, and the impedance of the common mode component can be increased. In addition, the first conductor 2
The insulator 24 having a low magnetic permeability is sandwiched between the conductors 7 and the second conductor 28 and between the conductors the third conductor 29 and the fourth conductor 30, and the magnetic field generated by these conductors can be made stronger. As a result, the effect that the common mode noise can be efficiently suppressed is obtained.
【００２７】また、第１の導体２７から第４の導体３０
を挟むように配置される第１の絶縁体層２１および第３
の絶縁体層２３の透磁率を低くすることでより一層の効
果が得られる。Further, the first conductor 27 to the fourth conductor 30
A first insulator layer 21 and a third insulator layer 21 arranged so as to sandwich
Further effects can be obtained by lowering the magnetic permeability of the insulating layer 23.
【００２８】低透磁率の材料からなる絶縁体２４の材料
としては、実施の形態１と同様のものを用いることで同
様の効果を奏する。The same effect can be obtained by using the same material as that of the first embodiment as the material of the insulator 24 made of a material having a low magnetic permeability.
【００２９】（実施の形態３）以下、本発明の実施の形
態３を用いて本発明の特に請求項３に記載の発明につい
て説明する。(Embodiment 3) The invention according to claim 3 of the present invention will be described below with reference to Embodiment 3 of the present invention.
【００３０】図５は本発明の実施の形態３におけるコモ
ンモードノイズフィルタの分解斜視図である。FIG. 5 is an exploded perspective view of the common mode noise filter according to the third embodiment of the present invention.
【００３１】図５において、本実施の形態と実施の形態
１と異なる点は、第２の絶縁体層２２の透磁率は第１の
絶縁体層２１、第３の絶縁体層２３の透磁率より低いと
いうことではなく、同じであり、例えば印刷法によって
形成された第１、第２の導体２７，２８または前記と同
様に形成された第３、第４の導体２９，３０のうち少な
くとも一方において、２つの導体の端部を除いて前記２
つの導体を覆うように上部に低透磁率の絶縁体２５を設
け、さらにこの絶縁体２５の透磁率が他の絶縁体層２１
乃至２３のそれより低いとした点であり、実施の形態１
で説明したものと同じものは同一符号を付し、その説明
は省略する。In FIG. 5, the difference between this embodiment and the first embodiment is that the permeability of the second insulator layer 22 is the permeability of the first insulator layer 21 and the third insulator layer 23. At least one of the first and second conductors 27 and 28 formed by a printing method or the third and fourth conductors 29 and 30 formed in the same manner as described above In the above 2 except for the ends of the two conductors
An insulator 25 having a low magnetic permeability is provided on the upper part so as to cover one conductor, and the magnetic permeability of the insulator 25 is equal to that of another insulator layer 21.
23 to 23, which is lower than that of Embodiment 1.
The same components as those described in 1 are assigned the same reference numerals and explanations thereof will be omitted.
【００３２】このような構成にすることによって、第１
の導体２７乃至第４の導体３０を渦巻き状とし、第１の
導体２７と第２の導体２８および第３の導体２９と第４
の導体３０はほぼ並行に配置されることにより、１つの
絶縁体層に設けられた渦巻き状の各導体間の距離を短く
でき、さらに一層あたりの磁路を渦巻き状とすることで
長くでき、これにより各導体で発生し互いに影響を及ぼ
し合う磁界の強さが強くなり、コモンモード成分のイン
ピーダンスを大きくすることができる。加えて、低透磁
率の絶縁体２５を他の絶縁体層より透磁率を低くするた
め、第１の導体２７と第２の導体２８の導体間および第
３の導体２９と第４の導体３０の導体間に低透磁率の絶
縁体２５を挟む構造となり、これらの導体で発生する磁
界の強さをより強くでき、これらの結果、効率的にコモ
ンモードのノイズが抑制できるという効果が得られる。With such a configuration, the first
The second conductor 27 to the fourth conductor 30 are formed in a spiral shape, and the first conductor 27, the second conductor 28, the third conductor 29, and the fourth conductor
By arranging the conductors 30 of substantially parallel to each other, the distance between the spiral-shaped conductors provided in one insulator layer can be shortened, and further, by making the magnetic path per layer spiral, it can be lengthened. As a result, the strength of the magnetic field generated in each conductor and affecting each other becomes stronger, and the impedance of the common mode component can be increased. In addition, in order to make the low-permeability insulator 25 have a lower magnetic permeability than the other insulator layers, between the conductors of the first conductor 27 and the second conductor 28 and between the third conductor 29 and the fourth conductor 30. The structure is such that the low-permeability insulator 25 is sandwiched between the conductors, and the strength of the magnetic field generated by these conductors can be increased, and as a result, the effect that the common mode noise can be efficiently suppressed can be obtained. .
【００３３】また、第１の導体２７から第４の導体３０
を挟むように配置される第１の絶縁体層２１および第３
の絶縁体層２３の透磁率を低くすることでより一層の効
果が得られる。In addition, the first conductor 27 to the fourth conductor 30
A first insulator layer 21 and a third insulator layer 21 arranged so as to sandwich
Further effects can be obtained by lowering the magnetic permeability of the insulating layer 23.
【００３４】また低透磁率の絶縁体２５の材料も実施の
形態１と同様のものを用いることで同様の効果を奏す
る。Further, the same effect can be obtained by using the same material as the insulator 25 having a low magnetic permeability as in the first embodiment.
【００３５】（実施の形態４）以下、本発明の実施の形
態４を用いて本発明の特に請求項４に記載の発明につい
て説明する。(Embodiment 4) The invention of claim 4 of the present invention will be described below with reference to Embodiment 4 of the present invention.
【００３６】図６は本発明の実施の形態４におけるコモ
ンモードノイズフィルタの分解斜視図である。FIG. 6 is an exploded perspective view of the common mode noise filter according to the fourth embodiment of the present invention.
【００３７】図６において、本実施の形態と実施の形態
１と異なる点は、第２の絶縁体層２２の透磁率は第１の
絶縁体層２１、第３の絶縁体層２３の透磁率より低いと
いうのではなく同じであり、例えばめっき工法によって
形成された第２の導体２８と前記と同様に形成された第
３の導体２９の間に低透磁率の絶縁体２６を設け、この
低透磁率の絶縁体２６が他の絶縁体層２１乃至２３より
低いものであり、実施の形態１で説明したものと同じも
のは同一符号を付し、その説明は省略する。In FIG. 6, the difference between this embodiment and the first embodiment is that the permeability of the second insulator layer 22 is the permeability of the first insulator layer 21 and the third insulator layer 23. It is the same, not lower, and for example, the low-permeability insulator 26 is provided between the second conductor 28 formed by the plating method and the third conductor 29 formed in the same manner as described above. The insulator 26 having magnetic permeability is lower than the other insulator layers 21 to 23, and the same components as those described in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.
【００３８】このような構成にすることによって、少な
くとも第２の導体２８と第３の導体２９を渦巻き状と
し、一層あたりの磁路を長くでき、これにより第２の導
体２８および第３の導体２９で発生する磁界を大きくで
き、コモンモード成分のインピーダンスを大きくするこ
とができる。加えて、低透磁率の絶縁体２６を他の絶縁
体層より透磁率を低くするため、第２の導体２８と第３
の導体２９で低透磁率の絶縁体２６を挟む構造により、
磁界を強め合う方向に対向させて配置することでさらに
磁界を強め合い、これらの結果、効率的にコモンモード
のノイズが抑制できるという効果が得られる。With such a structure, at least the second conductor 28 and the third conductor 29 are formed in a spiral shape, and the magnetic path per one layer can be lengthened, whereby the second conductor 28 and the third conductor are formed. The magnetic field generated at 29 can be increased, and the impedance of the common mode component can be increased. In addition, since the low-permeability insulator 26 has a lower magnetic permeability than the other insulator layers, the second conductor 28 and the third conductor 28
The structure in which the low magnetic permeability insulator 26 is sandwiched between the conductors 29 of
By arranging the magnetic fields so as to face each other in the direction of strengthening each other, the magnetic fields are further strengthened, and as a result, the effect of effectively suppressing common mode noise can be obtained.
【００３９】また、第１の導体２７から第４の導体３０
を挟むように配置される第１の絶縁体層２１および第３
の絶縁体層２３の透磁率を低くすることでより一層の効
果が得られる。さらに低透磁率の絶縁体２６の材料とし
て実施の形態１と同様のものを用いることで同様の効果
を奏する。In addition, the first conductor 27 to the fourth conductor 30
A first insulator layer 21 and a third insulator layer 21 arranged so as to sandwich
Further effects can be obtained by lowering the magnetic permeability of the insulating layer 23. Further, the same effect can be obtained by using the same material as that of the first embodiment as the material of the low magnetic permeability insulator 26.
【００４０】[0040]
【発明の効果】以上のように本発明によれば、第１乃至
第４の導体の少なくとも２つを渦巻き状とし、第１の導
体と第２の導体および第３の導体と第４の導体はほぼ並
行に配置され、１つの絶縁層に設けられた渦巻き状の各
導体間の距離を短くでき、さらにこの導体間距離が短い
部分は各導体を渦巻き状としたことで長くでき、これに
より各導体間で発生し互いに影響を及ぼし合う磁界が強
くなり、コモンモード成分のインピーダンスを大きくす
ることができる。加えて、スルーホールを有する第２の
絶縁体層の透磁率を他の絶縁体層の透磁率以下とするこ
とにより、第１の導体と第２の導体および第３の導体と
第４の導体間に低透磁率の絶縁体層を挟む構造となり、
これらの導体で発生する磁界をより強くでき、これらの
結果、効率的にコモンモードのノイズが抑制できるとい
う効果を得ることができる。As described above, according to the present invention, at least two of the first to fourth conductors are formed in a spiral shape, and the first conductor and the second conductor, and the third conductor and the fourth conductor. Are arranged substantially parallel to each other, and the distance between the spiral-shaped conductors provided in one insulating layer can be shortened. Furthermore, the portion where the distance between the conductors is short can be lengthened by making each conductor a spiral shape. The magnetic fields generated between the conductors and affecting each other become stronger, and the impedance of the common mode component can be increased. In addition, by setting the magnetic permeability of the second insulator layer having the through holes to be equal to or less than the magnetic permeability of the other insulator layers, the first conductor and the second conductor, and the third conductor and the fourth conductor. It has a structure in which an insulating layer of low magnetic permeability is sandwiched between
The magnetic field generated by these conductors can be made stronger, and as a result, the effect of effectively suppressing common mode noise can be obtained.
【図１】本発明の実施の形態１におけるコモンモードノ
イズフィルタの構造を示す分解斜視図FIG. 1 is an exploded perspective view showing a structure of a common mode noise filter according to a first embodiment of the present invention.
【図２】本発明の実施の形態１におけるコモンモードノ
イズフィルタの斜視図FIG. 2 is a perspective view of a common mode noise filter according to the first embodiment of the present invention.
【図３】本発明の実施の形態２におけるコモンモードノ
イズフィルタの構造を示す分解斜視図FIG. 3 is an exploded perspective view showing a structure of a common mode noise filter according to a second embodiment of the present invention.
【図４】本発明の実施の形態２における第１の絶縁体層
の上面図FIG. 4 is a top view of a first insulator layer according to the second embodiment of the present invention.
【図５】本発明の実施の形態３におけるコモンモードノ
イズフィルタの構造を示す分解斜視図FIG. 5 is an exploded perspective view showing a structure of a common mode noise filter according to a third embodiment of the present invention.
【図６】本発明の実施の形態４におけるコモンモードノ
イズフィルタの構造を示す分解斜視図FIG. 6 is an exploded perspective view showing a structure of a common mode noise filter according to a fourth embodiment of the present invention.
【図７】従来のコモンモードノイズフィルタの構造を示
す分解斜視図FIG. 7 is an exploded perspective view showing the structure of a conventional common mode noise filter.
２１ 第１の絶縁体層 ２２ スルーホールを有する第２の絶縁体層 ２３ 第３の絶縁体層 ２４，２５，２６ 低透磁率の絶縁体 ２７ 第１の導体 ２８ 第２の導体 ２９ 第３の導体 ３０ 第４の導体 ３１ 導電材が充填されたスルーホール ３２ 外部電極 ３３ コモンモードノイズフィルタ 21 First Insulator Layer 22 Second Insulator Layer Having Through Holes 23 Third Insulator Layer 24,25,26 Low Permeability Insulator 27 First conductor 28 Second conductor 29 Third conductor 30 Fourth conductor 31 Through hole filled with conductive material 32 external electrodes 33 Common mode noise filter
───────────────────────────────────────────────────── フロントページの続き (72)発明者 新海 淳 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 大石 一夫 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 瓜生 英一 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Ｆターム(参考） 5E070 AA01 AB04 CB02 CB12 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Jun Shinkai 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Sangyo Co., Ltd. (72) Inventor Kazuo Oishi 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Sangyo Co., Ltd. (72) Inventor Eiichi Uryu 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Sangyo Co., Ltd. F-term (reference) 5E070 AA01 AB04 CB02 CB12
Claims (7)
の上面に設けられた渦巻き状の第１および第２の導体
と、前記第１、第２の導体の上部に設けられたスルーホ
ールを有する第２の絶縁体シートからなる第２の絶縁体
層と、前記第２の絶縁体層の上面に設けられ前記スルー
ホールを介して電気的に接続された渦巻き状の第３およ
び第４の導体と、前記第３、第４の導体の上部に設けら
れた第３の絶縁体層と、前記第１乃至第４の導体の端部
にそれぞれ電気的に接続された外部電極とを備え、前記
第１と第２の導体および第３と第４の導体がほぼ並行に
配置され、さらに、前記第２の絶縁体層が他の絶縁体層
の透磁率以下としたコモンモードノイズフィルタ。1. A first insulator layer, first and second spiral conductors provided on the upper surface of the first insulator layer, and provided on top of the first and second conductors. A second insulator layer composed of a second insulator sheet having through holes formed therein, and a spiral-shaped first insulator layer provided on the upper surface of the second insulator layer and electrically connected through the through holes. Third and fourth conductors, a third insulator layer provided on top of the third and fourth conductors, and an external portion electrically connected to end portions of the first to fourth conductors, respectively. A common in which the first and second conductors and the third and fourth conductors are arranged substantially parallel to each other, and the second insulator layer has a magnetic permeability equal to or less than that of another insulator layer. Mode noise filter.
の上面に設けられた渦巻き状の第１および第２の導体
と、前記第１、第２の導体の上部に設けられたスルーホ
ールを有する第２の絶縁体シートからなる第２の絶縁体
層と、前記第２の絶縁体層の上面に設けられ前記スルー
ホールを介して電気的に接続された渦巻き状の第３およ
び第４の導体と、前記第３、第４の導体の上部に設けら
れた第３の絶縁体層と、前記第１乃至第４の導体の端部
にそれぞれ電気的に接続された外部電極とを備え、前記
第１と第２の導体および第３と第４の導体がほぼ並行に
配置され、かつ、前記第１と第２の導体および第３と第
４の導体のうち少なくとも一方の導体間に配置された絶
縁体の透磁率が前記第１から第３のいずれの絶縁体層の
透磁率以下としたコモンモードノイズフィルタ。2. A first insulator layer, first and second spiral conductors provided on the upper surface of the first insulator layer, and provided on top of the first and second conductors. A second insulator layer composed of a second insulator sheet having through holes formed therein, and a spiral-shaped first insulator layer provided on the upper surface of the second insulator layer and electrically connected through the through holes. Third and fourth conductors, a third insulator layer provided on top of the third and fourth conductors, and an external portion electrically connected to end portions of the first to fourth conductors, respectively. An electrode, the first and second conductors and the third and fourth conductors are arranged substantially in parallel, and at least one of the first and second conductors and the third and fourth conductors The permeability of the insulator disposed between the conductors is less than or equal to the permeability of any of the first to third insulator layers. Mode noise filter.
の上面に設けられた渦巻き状の第１および第２の導体
と、前記第１、第２の導体の上部に設けられたスルーホ
ールを有する第２の絶縁体シートからなる第２の絶縁体
層と、前記第２の絶縁体層の上面に設けられ前記スルー
ホールを介して電気的に接続された渦巻き状の第３およ
び第４の導体と、前記第３、第４の導体の上部に設けら
れた第３の絶縁体層と、前記第１乃至第４の導体の端部
にそれぞれ電気的に接続された外部電極とを備え、前記
第１と第２の導体および第３と第４の導体がほぼ並行に
配置され、前記第１、第２の導体または第３、第４の導
体のうち少なくとも一方において、前記スルーホールと
接続する前記２つの導体の端部および前記外部電極と接
続する端部を除いて、前記２つの導体を覆うように設け
られた第４の絶縁体層が他の絶縁体層の透磁率以下であ
るコモンモードノイズフィルタ。3. A first insulator layer, first and second spiral conductors provided on the upper surface of the first insulator layer, and provided on top of the first and second conductors. A second insulator layer composed of a second insulator sheet having through holes formed therein, and a spiral-shaped first insulator layer provided on the upper surface of the second insulator layer and electrically connected through the through holes. Third and fourth conductors, a third insulator layer provided on top of the third and fourth conductors, and an external portion electrically connected to end portions of the first to fourth conductors, respectively. An electrode, wherein the first and second conductors and the third and fourth conductors are arranged substantially in parallel, and at least one of the first and second conductors or the third and fourth conductors, Except for the ends of the two conductors connected to the through holes and the ends connected to the external electrodes, A common mode noise filter in which the fourth insulator layer provided so as to cover the two conductors has a magnetic permeability equal to or lower than the magnetic permeability of another insulator layer.
の上面に設けられた渦巻き状の第１の導体と、第１の導
体の上部に設けられた第１のスルーホールを有する第２
の絶縁体シートと、前記第１のスルーホールを介して接
続する渦巻き状の第２の導体と、前記第２の導体の上部
に設けられた第３の絶縁体層と、前記第３の絶縁体層の
上面に設けられた渦巻き状の第３の導体と、前記第３の
導体の上部に設けられた第２のスルーホールを有する第
４の絶縁体シートと、前記第２のスルーホールを介して
接続する渦巻き状の第４の導体と、前記第４の導体の上
部に設けられた第５の絶縁体層と、前記第１乃至第４の
導体の端部にそれぞれ電気的に接続された外部電極とを
備え、前記第２と第３の導体が第１と第４の導体の巻き
数より多く、さらに前記第２乃至４の少なくとも一つの
絶縁体層が他の絶縁体層の透磁率以下としたコモンモー
ドノイズフィルタ。4. A first insulator layer, a spiral first conductor provided on an upper surface of the first insulator layer, and a first through hole provided on an upper portion of the first conductor. Second with
The insulating sheet, the spiral second conductor that is connected through the first through hole, the third insulating layer provided on the second conductor, and the third insulating layer. The spiral third conductor provided on the upper surface of the body layer, the fourth insulator sheet having the second through hole provided on the third conductor, and the second through hole. A fourth spiral conductor, which is connected through the fifth conductor layer, a fifth insulator layer provided above the fourth conductor, and end portions of the first to fourth conductors, respectively. External electrodes, the second and third conductors have more turns than the first and fourth conductors, and the at least one insulator layer of the second to fourth conductors is transparent to other insulator layers. Common mode noise filter with magnetic susceptibility or less.
ｕ−Ｃｏ系フェライトである請求項１〜４のいずれかに
記載のコモンモードノイズフィルタ。5. The material having a low magnetic permeability is Ni—Zn—C.
The common mode noise filter according to claim 1, which is a u-Co ferrite.
求項１〜４のいずれかに記載のコモンモードノイズフィ
ルタ。6. The common mode noise filter according to claim 1, wherein the material having a low magnetic permeability is an insulator.
ス、アルミナ−ガラス系誘電体、Ｚｎ−Ｃｕ系フェライ
トである請求項６に記載のコモンモードノイズフィル
タ。7. The common mode noise filter according to claim 6, wherein the insulator is forsterite glass, alumina-glass dielectric, or Zn-Cu ferrite.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001211835A JP2003031416A (en) | 2001-07-12 | 2001-07-12 | Common mode noise filter |
| CNB028034163A CN1272811C (en) | 2001-01-15 | 2002-01-11 | Noise filter and electronic apparatus comprising this noise filter |
| US10/466,097 US6853267B2 (en) | 2001-01-15 | 2002-01-11 | Noise filter and electronic apparatus comprising this noise filter |
| KR1020037009366A KR100712752B1 (en) | 2001-01-15 | 2002-01-11 | Noise filter and electronic apparatus comprising this noise filter |
| EP02729387A EP1365426A4 (en) | 2001-01-15 | 2002-01-11 | Noise filter and electronic apparatus comprising this noise filter |
| PCT/JP2002/000135 WO2002056322A1 (en) | 2001-01-15 | 2002-01-11 | Noise filter and electronic apparatus comprising this noise filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001211835A JP2003031416A (en) | 2001-07-12 | 2001-07-12 | Common mode noise filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003031416A true JP2003031416A (en) | 2003-01-31 |
Family
ID=19047087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001211835A Pending JP2003031416A (en) | 2001-01-15 | 2001-07-12 | Common mode noise filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003031416A (en) |
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| JPH0849512A (en) * | 1994-08-03 | 1996-02-20 | Hitachi Metals Ltd | Engine valve |
| JP2006286886A (en) * | 2005-03-31 | 2006-10-19 | Tdk Corp | Common mode choke coil array |
| WO2006121003A1 (en) * | 2005-05-11 | 2006-11-16 | Matsushita Electric Industrial Co., Ltd. | Common mode noise filter |
| JP2007227517A (en) * | 2006-02-22 | 2007-09-06 | Mitsubishi Materials Corp | Laminated noise filter |
| KR100806070B1 (en) * | 2006-10-23 | 2008-02-21 | 강순금 | Display device using light emitting diode |
| JPWO2007145189A1 (en) * | 2006-06-14 | 2009-10-29 | 株式会社村田製作所 | Multilayer ceramic electronic components |
| JP2011035364A (en) * | 2009-08-03 | 2011-02-17 | Inpaq Technology Co Ltd | Common mode filter, and method for manufacturing the same |
| JP2013140927A (en) * | 2011-12-29 | 2013-07-18 | Samsung Electro-Mechanics Co Ltd | Thin film-type coil component and method of fabricating the same |
| JP2014049756A (en) * | 2012-08-29 | 2014-03-17 | Samsung Electro-Mechanics Co Ltd | Thin film type common mode filter |
| KR20150081834A (en) * | 2014-01-07 | 2015-07-15 | 삼성전기주식회사 | Coil component and and board for mounting the same |
| JP2015130450A (en) * | 2014-01-08 | 2015-07-16 | 住友電工プリントサーキット株式会社 | flexible printed wiring board |
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|---|---|---|---|---|
| JPH0849512A (en) * | 1994-08-03 | 1996-02-20 | Hitachi Metals Ltd | Engine valve |
| JP2006286886A (en) * | 2005-03-31 | 2006-10-19 | Tdk Corp | Common mode choke coil array |
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| JP2011035364A (en) * | 2009-08-03 | 2011-02-17 | Inpaq Technology Co Ltd | Common mode filter, and method for manufacturing the same |
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| US9966181B2 (en) | 2011-12-29 | 2018-05-08 | Samsung Electro-Mechanics Co., Ltd. | Thin film-type coil component and method of fabricating the same |
| JP2014049756A (en) * | 2012-08-29 | 2014-03-17 | Samsung Electro-Mechanics Co Ltd | Thin film type common mode filter |
| KR20150081834A (en) * | 2014-01-07 | 2015-07-15 | 삼성전기주식회사 | Coil component and and board for mounting the same |
| JP2015130472A (en) * | 2014-01-07 | 2015-07-16 | サムソン エレクトロ−メカニックス カンパニーリミテッド． | Coil component and mounting substrate thereof |
| KR102069628B1 (en) * | 2014-01-07 | 2020-01-23 | 삼성전기주식회사 | Coil component and and board for mounting the same |
| JP2015130450A (en) * | 2014-01-08 | 2015-07-16 | 住友電工プリントサーキット株式会社 | flexible printed wiring board |
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