JP4317179B2 - Multilayer filter - Google Patents

Multilayer filter Download PDF

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JP4317179B2
JP4317179B2 JP2005285224A JP2005285224A JP4317179B2 JP 4317179 B2 JP4317179 B2 JP 4317179B2 JP 2005285224 A JP2005285224 A JP 2005285224A JP 2005285224 A JP2005285224 A JP 2005285224A JP 4317179 B2 JP4317179 B2 JP 4317179B2
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conductor
stray capacitance
terminal electrode
coil
conductor portion
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JP2007096922A (en
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賢太郎 吉田
正志 折原
修美 熊谷
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TDK Corp
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Description

本発明は、積層型フィルタに関する。   The present invention relates to a multilayer filter.

従来の積層型フィルタとして、複数の絶縁体層が積層されてなる積層体と、積層体に形成された端子電極と、積層体内に設けられ、端子電極と電気的に接続されたコイル部及びコンデン部と、を備えるものが知られている。一例として、特許文献１に記載された積層型フィルタでは、積層体内に形成された複数のコイル導体によりコイル部が構成されると共に、積層体内に形成された複数のキャパシタ導体によりコンデンサ部が構成さており、コイル部とコンデンサ部とが並列接続されている。
特開２００５−０５０９７３号公報 As a conventional multilayer filter, a laminated body in which a plurality of insulator layers are laminated, a terminal electrode formed in the laminated body, a coil portion and a capacitor provided in the laminated body and electrically connected to the terminal electrode. Is known. As an example, in the multilayer filter described in Patent Document 1, a coil unit is configured by a plurality of coil conductors formed in the multilayer body, and a capacitor unit is configured by a plurality of capacitor conductors formed in the multilayer body. The coil part and the capacitor part are connected in parallel.
JP 2005-050973 A

しかしながら、特許文献１に記載された積層型フィルタにあっては、コイル部とコンデンサ部とが並列接続されているため、共振周波数での減衰が浅く、且つ所定の挿入損失（例えば、２０ｄＢ）での周波数帯域（遮断帯域）が狭い減衰特性を示す。これは、コイル部とコンデンサ部との並列共振にて減衰が生じるものの、並列共振周波数より高い周波数帯域でのコンデンサ部のインピーダンスが低いため、並列共振周波数より高い周波数帯域では、入力信号がコンデンサ部のみを通過して出力されるためである。減衰特性において減衰が浅く、且つ遮断帯域が狭い場合、除去したいノイズの周波数帯域のみを選択的に除去する回路設計技術が確立されていても、積層型フィルタ毎の減衰特性のばらつきや、実装時の部品配置による発生ノイズの帯域ばらつき等により、ノイズを十分に除去できないという問題が生じるおそれがある。   However, in the multilayer filter described in Patent Document 1, since the coil part and the capacitor part are connected in parallel, the attenuation at the resonance frequency is shallow and the insertion loss (for example, 20 dB) is low. Shows a narrow attenuation characteristic. This is because the impedance of the capacitor section in the frequency band higher than the parallel resonance frequency is low, although the attenuation occurs due to the parallel resonance between the coil section and the capacitor section. It is because it passes through only the output. When the attenuation characteristics are shallow and the cutoff band is narrow, even if circuit design technology has been established that selectively removes only the frequency band of the noise to be removed, variations in the attenuation characteristics of each multilayer filter, There may be a problem that noise cannot be sufficiently removed due to variations in the band of generated noise due to the arrangement of parts.

本発明は、減衰特性をより一層向上することが可能な積層型フィルタを提供することを目的とする。   An object of the present invention is to provide a multilayer filter capable of further improving the attenuation characteristics.

上記目的を達成するために、本発明に係る積層型フィルタにおいては、複数の絶縁体層が積層されてなる積層体と、積層体に形成された第１の端子電極及び第２の端子電極と、積層体内に形成された複数の第１の導体部が電気的に接続されることにより構成され、一端が第１の端子電極に電気的に接続されると共に、他端が第２の端子電極に電気的に接続されたコイル部と、複数の第１の導体部との間で浮遊容量を発生させるように積層体内に形成されると共に、第１の導体部同士の間に配置される第２の導体部を有し、一端が第１の端子電極又は第２の端子電極の一方に電気的に接続された第１の浮遊容量発生部と、複数の第１の導体部との間で浮遊容量を発生させるように積層体内に形成されると共に、第１の導体部同士の間に配置される第３の導体部を有し、一端が第１の端子電極又は第２の端子電極の他方に電気的に接続された第２の浮遊容量発生部と、コイル部が発生する磁束を分断するように、積層体内において第１の浮遊容量発生部と第２の浮遊容量発生部との間に形成された第４の導体部と、を備え、第２の導体部及び第３の導体部は、コイル部の中心軸線方向から見て、第１の導体部と重なる形状を有し、第４の導体部は、コイル部の中心軸線方向から見て、コイル部により囲まれる内側の領域を含む形状を有していることを特徴とする。
In order to achieve the above object, in the multilayer filter according to the present invention, a laminated body in which a plurality of insulator layers are laminated, and a first terminal electrode and a second terminal electrode formed in the laminated body, The plurality of first conductor portions formed in the multilayer body are electrically connected, one end is electrically connected to the first terminal electrode, and the other end is the second terminal electrode. a coil portion that is electrically connected to, the are arranged Rutotomoni formed in the laminate to generate stray capacitance between a plurality of first conductor section, between the first conductor portions A first stray capacitance generating portion having two conductor portions, one end of which is electrically connected to one of the first terminal electrode or the second terminal electrode, and the plurality of first conductor portions. It is formed in the laminate to generate stray capacitance Rutotomoni, disposed between the adjacent first conductor portion A third conductor portion, so that one end is divided and the second stray capacitance generation portion that is electrically connected to the other of the first terminal electrodes and second terminal electrodes, the flux coil portion is generated And a fourth conductor portion formed between the first stray capacitance generation portion and the second stray capacitance generation portion in the multilayer body, wherein the second conductor portion and the third conductor portion are: A shape overlapping the first conductor portion when viewed from the central axis direction of the coil portion, and a shape of the fourth conductor portion including an inner region surrounded by the coil portion when viewed from the central axis direction of the coil portion It is characterized by having .

この積層型フィルタによれば、コイル部は、第１の浮遊容量発生部との間で浮遊容量を発生する第１のコイル部分と、第２の浮遊容量発生部との間で浮遊容量を発生する第２のコイル部分とを含むこととなる。そのため、第１のコイル部分と、第１のコイル部分及び第１の浮遊容量発生部により構成される第１のコンデンサ部分とが並列接続された第１の並列共振回路が形成され、第２のコイル部分と、第２のコイル部分及び第２の浮遊容量発生部により構成される第２のコンデンサ部分とが並列接続されて第２の並列共振回路が形成される。これにより、この積層型フィルタは、第１の並列共振回路と第２の並列共振回路とが直列に接続された回路構成となり、２組の減衰特性が合成されるため、減衰特性において減衰を深く、且つ遮断帯域を広くすることができる。   According to this multilayer filter, the coil section generates stray capacitance between the first coil section that generates stray capacitance with the first stray capacitance generation section and the second stray capacitance generation section. The second coil portion to be included. Therefore, a first parallel resonant circuit is formed in which the first coil portion and the first capacitor portion constituted by the first coil portion and the first stray capacitance generating portion are connected in parallel, and the second The coil part and the second capacitor part constituted by the second coil part and the second stray capacitance generator are connected in parallel to form a second parallel resonant circuit. As a result, the multilayer filter has a circuit configuration in which the first parallel resonance circuit and the second parallel resonance circuit are connected in series, and two sets of attenuation characteristics are combined. In addition, the cutoff band can be widened.

また、本発明に係る積層型フィルタにおいては、第１の浮遊容量発生部と第２の浮遊容量発生部との間に形成された第４の導体部を更に備えることが好ましい。この積層型フィルタによれば、２組の並列共振回路の独立性が高められた状態で減衰特性が合成されるため、減衰特性において減衰を更に深く、且つ遮断帯域を更に広くすることができる。 In the multilayer filter according to the present invention, it is preferable to further include a fourth conductor portion formed between the first stray capacitance generation portion and the second stray capacitance generation portion. According to this multilayer filter, the attenuation characteristics are synthesized in a state where the independence of the two sets of parallel resonance circuits is enhanced. Therefore, it is possible to further deepen the attenuation and further widen the cutoff band.

また、本発明に係る積層型フィルタにおいては、第４の導体部は、コイル部の中心軸線方向から見て、コイル部により囲まれる内側の領域を含む形状を有していることが好ましい。この積層型フィルタによれば、コイル部が発生する磁束を確実に分断することができ、２組の並列共振回路の独立性が更に高められた状態で減衰特性が合成されるため、減衰特性において減衰を更に深く、遮断帯域をより一層広くすることができる。   In the multilayer filter according to the present invention, it is preferable that the fourth conductor portion has a shape including an inner region surrounded by the coil portion when viewed from the central axis direction of the coil portion. According to this multilayer filter, the magnetic flux generated by the coil portion can be reliably divided, and the attenuation characteristics are synthesized in a state where the independence of the two parallel resonance circuits is further enhanced. The attenuation can be further deepened, and the stopband can be further widened.

また、本発明に係る積層型フィルタにおいては、第２の導体部及び前記第３の導体部は、コイル部の中心軸線方向から見て、第１の導体部と重なる形状を有していることが好ましい。この積層型フィルタによれば、コイル部が発生する磁束を、第２の導体部及び第３の導体部が阻害することが抑制されるため、高周波帯域の特性を高めることができる。   In the multilayer filter according to the present invention, the second conductor portion and the third conductor portion have a shape overlapping the first conductor portion when viewed from the central axis direction of the coil portion. Is preferred. According to this multilayer filter, since the second conductor portion and the third conductor portion inhibit the magnetic flux generated by the coil portion from being inhibited, the characteristics in the high frequency band can be enhanced.

本発明によれば、減衰特性をより一層向上することが可能な積層型フィルタを提供することができる。   According to the present invention, it is possible to provide a multilayer filter capable of further improving the attenuation characteristics.

以下、本発明に係る積層型フィルタの好適な実施形態について、図面を参照して詳細に説明する。なお、各図において同一又は相当部分には同一符号を付し、重複する説明を省略する。 Hereinafter, preferred embodiments of a multilayer filter according to the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same or an equivalent part, and the overlapping description is abbreviate | omitted.

［第１の実施形態］
図１に示されるように、第１の実施形態に係る積層型フィルタ１は、直方体状の積層体２と、積層体２の長手方向における両端部に形成された端子電極（第１の端子電極）３及び端子電極（第２の端子電極）４とを備えている。積層体２は、図２に示されるように、複数の絶縁体層６１〜６２０が積層されて構成されている。各絶縁体層６１〜６２０は、長方形薄板状に形成されており、端子電極３が形成される縁部から時計回りに縁部６ａ，６ｂ，６ｃ，６ｄを有している。 [First Embodiment]
As shown in FIG. 1, the multilayer filter 1 according to the first embodiment includes a rectangular parallelepiped laminated body 2 and terminal electrodes (first terminal electrodes) formed at both ends in the longitudinal direction of the laminated body 2. ) 3 and a terminal electrode (second terminal electrode) 4. As illustrated in FIG. 2, the stacked body 2 is configured by stacking a plurality of insulator layers 6 1 to 6 20 . Each of the insulator layers 6 1 to 6 20 is formed in a rectangular thin plate shape, and has edge portions 6a, 6b, 6c, and 6d in a clockwise direction from the edge portion on which the terminal electrode 3 is formed.

絶縁体層６４，６８，６１６上のそれぞれには、縁部６ｂ及び縁部６ｃに沿って延在する導体部（第１の導体部）７１，７２，７３が形成されており、絶縁体層６６，６１０，６１４上のそれぞれには、縁部６ａ及び縁部６ｄに沿って延在する導体部（第１の導体部）７４，７５，７６が形成されている。また、絶縁体層６２上には、端子電極３と接続された引出部８１が形成されており、絶縁体層６１８上には、端子電極４と接続された引出部８２が形成されている。 Each of the insulating layer 6 4, 6 8, 6 16, the conductor portions extending along the edge portion 6b and the edge 6c (first conductor portion) 7 1, 7 2, 7 3 are formed and, each of the insulating layer 6 6 6 10, 6 14, the conductor portions extending along the edges 6a and the edges 6d (first conductor portion) 7 4, 7 5, 7 6 Is formed. Further, on the insulating layer 6 2, lead portion 8 1 connected to the terminal electrodes 3 are formed on the insulating layer 6 18, lead portion 8 connected to the terminal electrode 4 2 is formed Has been.

導体部７１の縁部６ｄ側の端部と導体部７４の縁部６ｃ側の端部とは、絶縁体層６５上に形成された接続部９、及び絶縁体層６４，６５に形成されたスルーホールを介して、電気的に接続されており、導体部７４の縁部６ｂ側の端部と導体部７２の縁部６ａ側の端部とは、絶縁体層６７上に形成された接続部９、及び絶縁体層６６，６７に形成されたスルーホールを介して、電気的に接続されている。同様に、導体部７２の縁部６ｄ側の端部と導体部７５の縁部６ｃ側の端部とは、絶縁体層６９上に形成された接続部９、及び絶縁体層６８，６９に形成されたスルーホールを介して、電気的に接続されており、導体部７６の縁部６ｂ側の端部と導体部７３の縁部６ａ側の端部とは、絶縁体層６１５上に形成された接続部９、及び絶縁体層６１４，６１５に形成されたスルーホールを介して、電気的に接続されている。 Conductor portion 71 with the end portion of the edge portion 6d side and the conductor portion 7 4 edges 6c side end portion, the connecting portion 9 formed on the insulating layer 6 5, and the insulating layer 6 4, 6 5 through the formed-through holes are electrically connected, with the end of the edge portion 6b side of the conductor portion 7 4 and the conductor portion 7 second edge 6a side of the end insulator layer 6 7 on the connecting portion 9 formed, and via through holes formed in the insulating layer 6 6 6 7 are electrically connected. Similarly, the conductor part 7 and second edge portions 6d side of the end portion and the end portion of the edge portion 6c side of the conductor portion 7 5, the connecting portion 9 formed on the insulating layer 6 9, and the insulating layer 6 8, through the through holes formed in 6-9, and the electrically connected and the end portions of the edge portion 6b side of the conductor portion 7 6 and the conductor portion 7 3 edge 6a side of the end portion, connection 9 formed on the insulating layer 6 15, and through a through-hole formed in the insulating layer 6 14, 6 15, are electrically connected.

また、引出部８１と導体部７１の縁部６ａ側の端部とは、絶縁体層６３上に形成された接続部９、及び絶縁体層６２，６３に形成されたスルーホールを介して、電気的に接続されており、引出部８２と導体部７３の縁部６ｄ側の端部とは、絶縁体層６１７上に形成された接続部９、及び絶縁体層６１６，６１７に形成されたスルーホールを介して、電気的に接続されている。更に、導体部７５の縁部６ｂ側の端部と導体部７６の縁部６ｃ側の端部とは、絶縁体層６１１上に形成された接続部９、絶縁体層６１２上に形成された導体部（第４の導体部）１１、絶縁体層６１３上に形成された接続部９、及び絶縁体層６１０〜６１３に形成されたスルーホールを介して、電気的に接続されている。 Further, the lead portion 81 and the conductor portion 71 of the edge portion 6a side of the end portion, the connecting portion 9 formed on the insulating layer 6 3, and formed in the insulating layer 6 2, 6 3 through through hole, are electrically connected, and the lead portion 82 and the conductor portion 7 3 edges 6d side of the end portion, the connecting portion 9 formed on the insulating layer 6 17, and insulators Electrical connection is made through through holes formed in the layers 6 16 and 6 17 . Furthermore, the end portion of the edge portion 6b side of the conductor portion 7 5 and the conductor portion 7 6 edges 6c side end, connection portion 9 formed on the insulator layer 6 11, the insulator layer 6 12 above conductors formed on the (fourth conductor portion) 11, an insulating layer 6 13 connecting portion 9 formed on and through the through-holes formed in the insulating layer 6 10-6 13, electrical It is connected to the.

以上の電気的接続により、積層型フィルタ１は、積層体２内に形成された複数の導体部７１〜７６が電気的に接続されることにより構成されたコイル部１０を備え、コイル部１０は、一端が端子電極３に電気的に接続されると共に、他端が端子電極４に電気的に接続されることになる。 The electrical connection mentioned above, the multilayer filter 1 is provided with a coil portion 10 constructed by a plurality of conductor portions 7 1 to 7 6 formed in the multilayer body 2 is electrically connected, the coil unit 10 has one end electrically connected to the terminal electrode 3 and the other end electrically connected to the terminal electrode 4.

絶縁体層６５，６９上のそれぞれには、縁部６ａ及び縁部６ｂに沿って延在する導体部（第２の導体部）１２１，１２２が形成されており、絶縁体層６７上には、縁部６ｃ及び縁部６ｄに沿って延在する導体部（第２の導体部）１２３が形成されている。また、絶縁体層６３上には、端子電極３と接続された引出部１３が形成されている。 Conductor portions (second conductor portions) 12 1 and 12 2 extending along the edge portion 6a and the edge portion 6b are formed on the insulator layers 6 5 and 6 9 , respectively. on 6 7, conductor portions extending along the edge portion 6c and the edge 6d (the second conductor portion) 12 3 are formed. Further, on the insulating layer 6 3, lead portion 13 connected to the terminal electrodes 3 are formed.

導体部１２１の縁部６ｃ側の端部と導体部１２３の縁部６ｂ側の端部とは、絶縁体層６６上に形成された接続部９、及び絶縁体層６５，６６に形成されたスルーホールを介して、電気的に接続されており、導体部１２３の縁部６ａ側の端部と導体部１２２の縁部６ｄ側の端部とは、絶縁体層６８上に形成された接続部９、及び絶縁体層６７，６８に形成されたスルーホールを介して、電気的に接続されている。また、引出部１３と導体部１２１の縁部６ｄ側の端部とは、絶縁体層６４上に形成された接続部９、及び絶縁体層６３，６４に形成されたスルーホールを介して、電気的に接続されている。 End of the conductor portion 12 1 of the edge portion 6c side and the conductor portion 12 3 of the edge portion 6b side of the end portion, the connecting portion 9 formed on the insulating layer 6 6, and the insulating layer 6 5, 6 via a through hole formed in 6, it is electrically connected, with the end edge 6a side of the conductor portion 12 3 and the conductor portion 12 second edge 6d side of the end insulator layer 6 8 on the connection portion 9 is formed on, and through the through-holes formed in the insulating layer 6 7, 6 8, are electrically connected. Further, the end portion of the edge portion 6d side of the lead-out portion 13 and the conductor 12 1, through holes formed in the insulating layer 6 4 connecting portion 9 formed on, and the insulator layer 6 3, 6 4 Is electrically connected.

以上の電気的接続により、積層型フィルタ１は、導体部７１，７４との間で浮遊容量を発生させるように積層体２内に形成された導体部１２１、導体部７２，７５との間で浮遊容量を発生させるように積層体２内に形成された導体部１２２、及び導体部７４，７２との間で浮遊容量を発生させるように積層体２内に形成された導体部１２３を有した浮遊容量発生部１５（第１の浮遊容量発生部）を備え、浮遊容量発生部１５は、一端が端子電極３に電気的に接続され、他端が端子電極４に電気的に接続されないことになる。なお、導体部１２１〜１２３はコイル部１０の中心軸線Ｌ方向から見て、コイル部１０を構成する導体部７１，７２，７４，７５と重なる形状を有している。 With the above electrical connection, the multilayer filter 1 has the conductor portions 12 1 , conductor portions 7 2 , 7 formed in the multilayer body 2 so as to generate stray capacitance between the conductor portions 7 1 , 7 4. 5 formed in the laminate 2 so as to generate stray capacitance between the conductor portion 12 2 formed in the laminate 2 and the conductor portions 7 4 and 7 2 so as to generate stray capacitance with the conductor 5. floatation capacitance generation portion 15 having the conductor 12 3 (first stray capacitance generation portion) with a stray capacitance generating part 15 has one end electrically connected to the terminal electrode 3 and the other end terminal electrodes 4 is not electrically connected. Incidentally, the conductor portions 12 1 to 12 3 is viewed from the center axis L direction of the coil portion 10 has a shape overlapping the conductor portions 71, 7 2, 7 4, 7 5 constituting the coil portion 10.

絶縁体層６１５上には、縁部６ｃ及び縁部６ｄに沿って延在する導体部（第３の導体部）１６１が形成されており、絶縁体層６１７上には、縁部６ａ及び縁部６ｂに沿って延在する導体部（第３の導体部）１６２が形成されている。また、絶縁体層６１９上には、端子電極４と接続された引出部１７が形成されている。 On the insulator layer 6 15, the conductor portions extending along the edge portion 6c and edge 6d are (third conductor portion) 16 1 formed on the insulating layer 6 17, the edge conductor portions extending along the 6a and edge 6b (third conductor portion) 16 2 is formed. Further, on the insulating layer 6 19, lead portion 17 connected to the terminal electrode 4 is formed.

導体部１６１の縁部６ａ側の端部と導体部１６２の縁部６ｄ側の端部とは、絶縁体層６１６上に形成された接続部９、及び絶縁体層６１５，６１６に形成されたスルーホールを介して、電気的に接続されている。また、引出部１７と導体部１６２の縁部６ｃ側の端部とは、絶縁体層６１８上に形成された接続部９、及び絶縁体層６１７，６１８に形成されたスルーホールを介して、電気的に接続されている。 Conductor portion 16 1 of the edge portion 6a side of the end portion and the conductor portion 16 second edge 6d side of the end portion, the connecting portion 9 formed on the insulating layer 6 16, and the insulating layer 6 15, 6 They are electrically connected through a through hole formed in 16 . Further, the end portion of the edge portion 6c side lead portions 17 and the conductor portion 16 2, through holes formed in the insulating layer 6 18 connecting portion 9 formed on, and the insulating layer 6 17, 6 18 Is electrically connected.

以上の電気的接続により、積層型フィルタ１は、導体部７６，７３との間で浮遊容量を発生させるように積層体２内に形成された導体部１６１、及び導体部７３との間で浮遊容量を発生させるように積層体２内に形成された導体部１６２を有した浮遊容量発生部２０（第２の浮遊容量発生部）を備え、浮遊容量発生部２０は、一端が端子電極４に電気的に接続され、他端が端子電極３に電気的に接続されないことになる。なお、導体部１６１，１６２はコイル部１０の中心軸線Ｌ方向から見て、コイル部１０を構成する導体部７３，７６と重なる形状を有している。 With the above electrical connection, the multilayer filter 1 includes the conductor portions 16 1 and the conductor portions 7 3 formed in the laminate 2 so as to generate stray capacitance between the conductor portions 7 6 and 7 3. stray capacitance generation portion 20 having a conductor portion 16 2 formed in the laminate 2 so as to generate stray capacitance between comprises a (second stray capacitance generation portion), the stray capacitance generation portion 20 has one end Is electrically connected to the terminal electrode 4, and the other end is not electrically connected to the terminal electrode 3. The conductor portions 16 1 and 16 2 have a shape overlapping the conductor portions 7 3 and 7 6 constituting the coil portion 10 when viewed from the central axis L direction of the coil portion 10.

以上のように構成された積層型フィルタ１においては、図３及び図４に示されるように、コイル部１０は、浮遊容量発生部１５との間で浮遊容量を発生するコイル部分１０ａと、浮遊容量発生部２０との間で浮遊容量を発生するコイル部分１０ｂとを含むこととなる。そのため、コイル部分１０ａと、コイル部分１０ａ及び浮遊容量発生部１５により構成されるコンデンサ部分２１とが並列接続された並列共振回路２３が形成され、コイル部分１０ｂと、コイル部分１０ｂ及び浮遊容量発生部２０により構成されるコンデンサ部分２２とが並列接続された並列共振回路２４が形成される。これにより、積層型フィルタ１は、並列共振回路２３と並列共振回路２４とが直列に接続された回路構成となり、２組の減衰特性が合成されるため、減衰特性において減衰を深く、且つ遮断帯域を広くすることができる。   In the multilayer filter 1 configured as described above, as shown in FIGS. 3 and 4, the coil unit 10 includes a coil part 10 a that generates a stray capacitance between the coil unit 10 and the stray capacitance generation unit 15. The coil portion 10b that generates stray capacitance with the capacitance generation unit 20 is included. Therefore, a parallel resonant circuit 23 is formed in which the coil portion 10a and the capacitor portion 21 constituted by the coil portion 10a and the stray capacitance generating portion 15 are connected in parallel, and the coil portion 10b, the coil portion 10b, and the stray capacitance generating portion are formed. A parallel resonant circuit 24 is formed in which a capacitor portion 22 constituted by 20 is connected in parallel. Thus, the multilayer filter 1 has a circuit configuration in which the parallel resonance circuit 23 and the parallel resonance circuit 24 are connected in series, and two sets of attenuation characteristics are combined. Can be widened.

また、図５に示されるように、導体部１１はコイル部１０の中心軸線Ｌ方向から見て、コイル部１０により囲まれる内側の領域Ｒを含む形状を有している。そのため、図４に示されるように、コイル部１０が発生する磁束Ｆが確実に分断され、２組の並列共振回路２３，２４の独立性が高められた状態で減衰特性が合成されることになる。従って、減衰特性において減衰を更に深く、且つ遮断帯域を更に広くすることができる。 Further, as shown in FIG. 5, the conductor portion 11 has a shape including an inner region R surrounded by the coil portion 10 when viewed from the central axis L direction of the coil portion 10. Therefore, as shown in FIG. 4, the magnetic flux F generated by the coil section 10 is reliably divided, and the damping characteristics are synthesized in a state where the independence of the two parallel resonance circuits 23 and 24 is enhanced. Become. Therefore, the attenuation can be further deepened and the stop band can be further widened in the attenuation characteristic.

また、浮遊容量発生部１５を構成する導体部１２１〜１２３、及び浮遊容量発生部２０を構成する導体部１６１，１６２はコイル部１０の中心軸線Ｌ方向から見て、コイル部１０を構成する導体部７１〜７６と重なる形状を有している。これにより、コイル部１０が発生する磁束Ｆを、導体部１２１〜１２３及び導体部１６１，１６２が阻害することが抑制されるため、高周波帯域の特性を高めることができる。 Further, the conductor portions 12 1 to 12 3 constituting the stray capacitance generating portion 15 and the conductor portions 16 1 and 16 2 constituting the stray capacitance generating portion 20 are viewed from the direction of the central axis L of the coil portion 10. and a conductive portion 7 1-7 6 overlaps shape constituting the. Accordingly, the magnetic flux F of the coil portion 10 occurs, the conductor portions 12 1 to 12 3 and the conductor unit 16 1, 16 2 is prevented to inhibit, it is possible to enhance the characteristics of the high frequency band.

次に、積層型フィルタ１の製造方法について説明する。 Next, a method for manufacturing the multilayer filter 1 will be described.

まず、絶縁体層６１〜６２０となるグリーンシートを用意する。グリーンシートは、例えば、Ｆｅ２Ｏ３、ＺｎＯ及びＣｕＯの混合粉を原料としたスラリーをフィルム上にドクターブレード法により塗布して形成され、その厚さは、例えば、２０μｍ程度に設定される。なお、Ｆｅ２Ｏ３、ＺｎＯ及びＣｕＯの混合粉の代わりに、誘電体材料（ＴｉＯ２、ＣｕＯ、ＮｉＯ及びＭｎＣＯの混合粉等）や、酸化物セラミック材料（Ａｌ２Ｏ３、ＳｉＯ２、ＺｒＯ２、フォルステライト、ステアタイト、コージライト等）を用いてもよく、これらの混合粉を用いてもよい。 First, green sheets to be the insulator layers 6 1 to 6 20 are prepared. The green sheet is formed, for example, by applying slurry using a mixed powder of Fe 2 O 3, ZnO and CuO as a raw material on a film by a doctor blade method, and the thickness thereof is set to about 20 μm, for example. In place of the mixed powder of Fe 2 O 3 , ZnO and CuO, a dielectric material (such as a mixed powder of TiO 2 , CuO, NiO and MnCO) or an oxide ceramic material (Al 2 O 3 , SiO 2 , ZrO) 2 , forsterite, steatite, cordierite, etc.), or a mixed powder thereof may be used.

続いて、絶縁体層６１〜６２０となる各グリーンシートの所定の位置（すなわち、導体部７１〜７６、引出部８１、接続部９、導体部１１、導体部１２１，１２３、引出部１３、及び導体部１６１，１６２においてスルーホールを形成する位置）に、レーザー加工等によってスルーホールを形成する。 Subsequently, predetermined positions (that is, conductor portions 7 1 to 7 6 , lead portions 8 1 , connection portions 9, conductor portions 11, conductor portions 12 1 and 12) of the green sheets to be the insulator layers 6 1 to 6 20. 3, the position) of forming a through hole in the pull-out unit 13, and the conductor portion 16 1, 16 2, a through hole is formed by laser processing or the like.

続いて、絶縁体層６１〜６２０となる各グリーンシートに、導体部７１〜７６、引出部８１，８２、接続部９、導体部１１、導体部１２１〜１２３、引出部１３、導体部１６１，１６２、引出部１７に対応する各導体パターンを形成する。各導体パターンは、例えば、銀若しくはニッケルを主成分とする導体ペーストをスクリーン印刷した後、乾燥することによって形成される。各スルーホールには、各導体パターンを形成する際に、導体ペーストが充填されることとなる。 Subsequently, conductor portions 7 1 to 7 6 , lead portions 8 1 and 8 2 , connection portions 9, conductor portions 11, conductor portions 12 1 to 12 3 , on the green sheets to be the insulator layers 6 1 to 6 20 , Each conductor pattern corresponding to the lead-out portion 13, the conductor portions 16 1 and 16 2 , and the lead-out portion 17 is formed. Each conductor pattern is formed, for example, by screen-printing a conductor paste mainly composed of silver or nickel and then drying. Each through hole is filled with a conductor paste when each conductor pattern is formed.

続いて、絶縁体層６１〜６２０となる各グリーンシートを順次積層して圧着し、チップ単位に切断した後に所定温度（例えば、８００〜９４０度）にて焼成する。これにより、積層体２が形成されることとなる。積層体２は、例えば、完成後における長手方向の長さが１．０ｍｍ、幅が０．５ｍｍ、高さが０．５ｍｍとなるようにする。導体部７１〜７６、引出部８１，８２、接続部９、導体部１２１〜１２３、引出部１３、導体部１６１，１６２、引出部１７の焼成後における厚さは、例えば１２μｍ程度に設定され、導体部１１の焼成後における厚さは、例えば３μｍ程度に設定される。導体部７１〜７６、引出部８１，８２、導体部１２１〜１２３、引出部１３、導体部１６１，１６２、引出部１７の焼成後における幅は、例えば７０μｍ程度に設定される。 Subsequently, the green sheets to be the insulator layers 6 1 to 6 20 are sequentially stacked and pressure-bonded, cut into chips, and fired at a predetermined temperature (for example, 800 to 940 degrees). Thereby, the laminated body 2 will be formed. For example, the laminate 2 has a length in the longitudinal direction of 1.0 mm, a width of 0.5 mm, and a height of 0.5 mm after completion. The thicknesses of the conductor portions 7 1 to 7 6 , the lead portions 8 1 and 8 2 , the connection portion 9, the conductor portions 12 1 to 12 3 , the lead portion 13, the conductor portions 16 1 and 16 2 , and the lead portion 17 after firing are as follows. For example, the thickness is set to about 12 μm, and the thickness of the conductor portion 11 after firing is set to about 3 μm, for example. The width of the conductor portions 7 1 to 7 6 , the lead portions 8 1 and 8 2 , the conductor portions 12 1 to 12 3 , the lead portion 13, the conductor portions 16 1 and 16 2 , and the lead portion 17 after firing is, for example, about 70 μm. Is set.

続いて、この積層体２に端子電極３，４を形成する。これにより、積層型フィルタ１が得られることとなる。端子電極３，４は、積層体２の外表面に銀、ニッケル若しくは銅を主成分とする電極ペーストを転写した後に所定温度（例えば、６００〜７８０℃程度）にて焼き付け、更に電気めっきを施すことにより、形成される。電気めっきには、Ｃｕ／Ｎｉ／Ｓｎ、Ｎｉ／Ｓｎ、Ｎｉ／Ａｕ、Ｎｉ／Ｐｄ／Ａｕ、Ｎｉ／Ｐｄ／Ａｇ、又は、Ｎｉ／Ａｇ等が用いられる。 Subsequently, terminal electrodes 3 and 4 are formed on the laminate 2. Thereby, the multilayer filter 1 is obtained. The terminal electrodes 3 and 4 are baked at a predetermined temperature (for example, about 600 to 780 ° C.) and further electroplated after transferring an electrode paste mainly composed of silver, nickel or copper to the outer surface of the laminate 2. Is formed. For electroplating, Cu / Ni / Sn, Ni / Sn, Ni / Au, Ni / Pd / Au, Ni / Pd / Ag, Ni / Ag, or the like is used.

[第２の実施形態]
第２の実施形態に係る積層型フィルタ１は、以下の点で第１の実施形態に係る積層型フィルタ１と主に相違している。 [Second Embodiment]
The multilayer filter 1 according to the second embodiment is mainly different from the multilayer filter 1 according to the first embodiment in the following points.

すなわち、第２の実施形態に係る積層型フィルタ１においては、図６に示されるように、浮遊容量発生部１５は、導体部１１に近接した絶縁体層６１０に形成された引出部１３を介して、端子電極４と電気的に接続されている。また、浮遊容量発生部２０は、導体部１１に近接した絶縁体層６１３に形成された引出部１７を介して、端子電極３に電気的に接続されている。このように、コイル部１０の巻回中心部に引出部１３，１７を配置することにより、結合が大きくなるため、浮遊容量を大きくとることができる。 That is, in the multilayer filter 1 according to the second embodiment, as shown in FIG. 6, the stray capacitance generation portion 15, the lead portion 13 formed in the insulating layer 6 10 proximate to the conductor portion 11 And electrically connected to the terminal electrode 4. Further, stray capacitance generation portion 20, through the lead-out portion 17 formed in the insulator layer 6 13 proximate to the conductor portion 11 is electrically connected to the terminal electrode 3. In this manner, by arranging the lead portions 13 and 17 at the winding center portion of the coil portion 10, since the coupling becomes large, the stray capacitance can be increased.

[第３の実施形態]
第３の実施形態に係る積層型フィルタ１は、以下の点で第２の実施形態に係る積層型フィルタ１と主に相違している。 [Third embodiment]
The multilayer filter 1 according to the third embodiment is mainly different from the multilayer filter 1 according to the second embodiment in the following points.

すなわち、第３の実施形態に係る積層型フィルタ１においては、図７に示されるように、絶縁体層６１２上に形成された導体部１１は、コイル部１０から電気的に絶縁され、フローティング状態となっている。これにより、導体部１１と導体部７６との間、及び導体部１１と導体部７３との間に発生する浮遊容量が小さくなり、コイル部分１０ａ及びコイル部１０ｂの自己共振周波数を高く設定することができる。 That is, in the multilayer filter 1 according to the third embodiment, as shown in FIG. 7, the conductor portion 11 formed on the insulator layer 6 12 is electrically insulated from the coil unit 10, the floating It is in a state. Thus, between the conductor portion 11 and the conductor portion 7 6, and the floating capacitance generated between the conductor portion 11 and the conductor portion 7 3 decreases, set a high self-resonant frequency of the coil portion 10a and the coil portion 10b can do.

[第４の実施形態]
第４の実施形態に係る積層型フィルタ１は、積層体２内の導体パターンにおいて第１の実施形態に係る積層型フィルタ１と主に相違している。以下、第４の実施形態に係る積層型フィルタ１の導体パターンについて説明する。 [Fourth Embodiment]
The multilayer filter 1 according to the fourth embodiment is mainly different from the multilayer filter 1 according to the first embodiment in the conductor pattern in the multilayer body 2. Hereinafter, the conductor pattern of the multilayer filter 1 according to the fourth embodiment will be described.

図８に示すように、絶縁体層６３，６７，６１５，６１８上のそれぞれには、縁部６ａ、縁部６ｂ及び縁部６ｃに沿って延在する導体部７１，７２，７３，７４が形成されており、絶縁体層６６，６１０，６１６上のそれぞれには、縁部６ｃ、縁部６ｄ及び縁部６ａに沿って延在する導体部７５，７６，７７が形成されている。また、絶縁体層６２上には、端子電極３と接続された引出部８１が形成されており、絶縁体層６１９上には、端子電極４と接続された引出部８２が形成されている。 As shown in FIG. 8, each of the insulating layer 6 3, 6 7, 6 15, 6 18, the conductor section 71 extending along the edges 6a, edges 6b and edges 6c, 7 2 , 7 3 , and 7 4 are formed. On the insulator layers 6 6 , 6 10 , and 6 16 , the edge portion 6 c, the edge portion 6 d, and the conductor portion 7 extending along the edge portion 6 a are formed. 5 , 7 6 and 7 7 are formed. Further, on the insulating layer 6 2, lead portion 8 1 connected to the terminal electrodes 3 are formed on the insulating layer 6 19, lead portion 8 connected to the terminal electrode 4 2 is formed Has been.

導体部７１の縁部６ｃ側の端部と導体部７５の縁部６ｃ側の端部とは、絶縁体層６４，６５上に形成された接続部９、及び絶縁体層６３，６４，６５に形成されたスルーホールを介して、電気的に接続されており、導体部７５の縁部６ａ側の端部と導体部７２の縁部６ａ側の端部とは、絶縁体層６６に形成されたスルーホールを介して、電気的に接続されている。同様に、導体部７２の縁部６ｃ側の端部と導体部７６の縁部６ｃ側の端部とは、絶縁体層６８，６９上に形成された接続部９、及び絶縁体層６７，６８，６９に形成されたスルーホールを介して、電気的に接続されている。導体部７３の縁部６ｃ側の端部と導体部７７の縁部６ｃ側の端部とは、絶縁体層６１５，６１６に形成されたスルーホールを介して、電気的に接続されており、導体部７７の縁部ａ側の端部と導体部７４の縁部ａ側の端部とは、絶縁体層６１７上に形成された接続部９、及び絶縁体層６１６，６１７に形成されたスルーホールを介して、電気的に接続されている。 The end portion of the conductor portion 71 of the edge portion 6c side and the conductor portion 7 5 edges 6c side end, the insulator layer 6 4, 6 5 on connecting portion 9 formed, and the insulating layer 6 3, 6 4, 6 5 through the formed through hole, are electrically connected, the ends of the edge portion 6a side of the conductor portion 7 5 and the conductor portion 7 second edge 6a side of the end portion and via through holes formed in the insulating layer 6 6, it is electrically connected. Similarly, the conductor portion 7 and the end portions of the second edge 6c side and the conductor portion 7 6 edges 6c side of the insulator layer 6 8, 6 9 connecting portion 9 formed on, and insulated They are electrically connected through through holes formed in the body layers 6 7 , 6 8 , and 6 9 . The end portion of the edge portion 6c side of the conductor portion 7 3 and the conductor portion 7 7 edge 6c side end via a through hole formed in the insulator layer 6 15, 6 16, electrically connected are conductor portions 7 7 edge a side end portion and an end portion of the edge portion a side of the conductor portion 7 4, connecting portions 9 formed on the insulating layer 6 17, and insulator layer They are electrically connected through through holes formed in 6 16 and 6 17 .

また、引出部８１と導体部７１の縁部６ａ側の端部とは、絶縁体層６２に形成されたスルーホールを介して、電気的に接続されており、引出部８２と導体部７４の縁部６ｃ側の端部とは、絶縁体層６１８に形成されたスルーホールを介して、電気的に接続されている。更に、導体部７６の縁部６ａ側の端部と導体部７３の縁部６ａ側の端部とは、絶縁体層６１１上に形成された接続部９、絶縁体層６１２上に形成された導体部１１、絶縁体層６１３，６１４上に形成された接続部９、及び絶縁体層６１０〜６１４に形成されたスルーホールを介して、電気的に接続されている。 Further, the extraction unit 81 and the conductor portion 71 of the edge portion 6a side of the end portion via a through hole formed in the insulating layer 6 2, are electrically connected, the lead portion 8 2 the ends of the edge portions 6c side of the conductor portion 7 4 via through holes formed in the insulating layer 6 18, are electrically connected. Furthermore, the end portion of the edge portion 6a side of the conductor portion 7 6 and the conductor portion 7 3 edge 6a side of the end connecting portion 9 formed on the insulator layer 6 11, the insulator layer 6 12 above the conductor portion 11 is formed, the insulating layer 6 13, 6 14 connecting portion 9 formed on and through the through-holes formed in the insulating layer 6 10-6 14, are electrically connected Yes.

以上の電気的接続により、積層型フィルタ１は、積層体２内に形成された複数の導体部７１〜７７が電気的に接続されることにより構成されたコイル部１０を備え、コイル部１０は、一端が端子電極３に電気的に接続されると共に、他端が端子電極４に電気的に接続されることになる。 With the above electrical connection, the multilayer filter 1 includes the coil portion 10 configured by electrically connecting the plurality of conductor portions 7 1 to 7 7 formed in the multilayer body 2. 10 has one end electrically connected to the terminal electrode 3 and the other end electrically connected to the terminal electrode 4.

絶縁体層６４，６５，６８，６９上のそれぞれには、縁部６ｄ、縁部６ａ及び縁部６ｂに沿って延在する導体部１２１〜１２４、及び各導体部１２１〜１２４と端子電極３とを電気的に接続する引出部１３が形成されている。 On each of the insulator layers 6 4 , 6 5 , 6 8 , and 6 9 , the edge portion 6 d, the conductor portions 12 1 to 12 4 extending along the edge portion 6 a and the edge portion 6 b, and the respective conductor portions 12. lead portion 13 for electrically connecting are formed a 1-12 4 and the terminal electrode 3.

以上により、積層型フィルタ１は、導体部７１との間で浮遊容量を発生させるように積層体２内に形成された導体部１２１を有した浮遊容量発生部１５１、導体部７５との間で浮遊容量を発生させるように積層体２内に形成された導体部１２２を有した浮遊容量発生部１５２、導体部７２との間で浮遊容量を発生させるように積層体２内に形成された導体部１２３を有した浮遊容量発生部１５３、及び導体部７６との間で浮遊容量を発生させるように積層体２内に形成された導体部１２４を有した浮遊容量発生部１５４を備え、各浮遊容量発生部１５１〜１５４は、一端が端子電極３に電気的に接続されることになる。なお、導体部１２１〜１２４はコイル部１０の中心軸線Ｌ方向から見て、コイル部１０を構成する導体部７１，７２，７５，７６と重なる形状を有している。 By the above, the multilayer filter 1, a floating capacitance generation portion 15 1 having a conductor portion 12 1 formed in the laminated body 2 so as to generate stray capacitance between the conductor part 71, the conductor portion 7 5 stack to generate stray capacitance between the floating capacitance stray capacitance generation portion 15 2 having a conductor portion 12 2 formed in the laminate 2 so as to generate a conductor section 7 2 between stray capacitance generation portion 15 having the conductor 12 3 formed in the 2 3, and the conductor portion 7 have a conductor portion 12 4 formed in the laminate 2 so as to generate stray capacitance between the 6 The stray capacitance generator 15 4 is provided, and one end of each of the stray capacitance generators 15 1 to 15 4 is electrically connected to the terminal electrode 3. The conductor portions 12 1 to 12 4 have a shape that overlaps with the conductor portions 7 1 , 7 2 , 7 5 , and 7 6 that constitute the coil portion 10 when viewed from the central axis L direction of the coil portion 10.

絶縁体層６１４，６１７上のそれぞれには、縁部６ｂ、縁部６ｃ及び縁部６ｄに沿って延在する導体部１６１，１６２、及び各導体部１６１，１６２と、端子電極４とを電気的に接続する引出部１７が形成されている。 On each of the insulator layers 6 14 and 6 17 , the edge portion 6 b, the edge portions 6 c and the conductor portions 16 1 and 16 2 extending along the edge portion 6 d, and the conductor portions 16 1 and 16 2 , A lead-out portion 17 that electrically connects the terminal electrode 4 is formed.

以上により、積層型フィルタ１は、導体部７３との間で浮遊容量を発生させるように積層体２内に形成された導体部１６１を有した浮遊容量発生部２０１、導体部７４，７７との間で浮遊容量を発生させるように積層体２内に形成された導体部１６２を有した浮遊容量発生部２０２を備え、各浮遊容量発生部２０１，２０２は、一端が端子電極４に電気的に接続されることになる。なお、導体部１６１，１６２はコイル部１０の中心軸線Ｌ方向から見て、コイル部１０を構成する導体部７３，７４，７７と重なる形状を有している。 By the above, the multilayer filter 1, a floating capacitance generation portion 20 1 having a conductor portion 16 1 formed in the laminated body 2 so as to generate stray capacitance between the conductor portion 7 3, the conductor portion 7 4 includes a stray capacitance generation portion 20 2 having a conductor portion 16 2 formed in the laminate 2 so as to generate stray capacitance between the 7 7, each floating capacitance generating portion 20 1, 20 2, One end is electrically connected to the terminal electrode 4. The conductor portions 16 1 and 16 2 have a shape that overlaps with the conductor portions 7 3 , 7 4 , and 7 7 constituting the coil portion 10 when viewed from the central axis L direction of the coil portion 10.

以上のように構成された積層型フィルタ１によっても、第１の実施形態に係る積層型フィルタ１と同様の効果が奏される。   The same effect as the multilayer filter 1 according to the first embodiment can be obtained by the multilayer filter 1 configured as described above.

[第６の実施形態]
次に、第６の実施形態に係る積層型フィルタ１を図１０及び図１１により説明する。本実施形態に係る積層型フィルタ１は、積層体２の側面に端子電極３，４を4組並設し、積層体２内に第１の実施形態に係る積層型フィルタ１を構成するコイル部１０、浮遊容量発生部１５及び浮遊容量発生部２０を4組並設することにより形成されている。 [Sixth Embodiment]
Next, a multilayer filter 1 according to a sixth embodiment will be described with reference to FIGS. In the multilayer filter 1 according to the present embodiment, four sets of terminal electrodes 3 and 4 are arranged in parallel on the side surface of the multilayer body 2, and the coil portion that constitutes the multilayer filter 1 according to the first embodiment in the multilayer body 2. 10, the stray capacitance generation unit 15 and the stray capacitance generation unit 20 are arranged in parallel.

このように積層型フィルタ１をアレイ状に形成してもよい。 Thus, the multilayer filter 1 may be formed in an array.

最後に、本発明に係る積層型フィルタの減衰特性がより一層向上されていることを、コイル部とコンデンサ部とが並列接続されてなる特許文献１記載の積層型フィルタと比較することにより具体的に示す。   Finally, the fact that the attenuation characteristics of the multilayer filter according to the present invention are further improved is compared with the multilayer filter described in Patent Document 1 in which the coil portion and the capacitor portion are connected in parallel. Shown in

積層型フィルタの電気的特性を図１２に示す。図中、実線Ａは第１の実施形態に係る積層型フィルタ、鎖線Ｂは第５の実施形態に係る積層型フィルタ、点線Ｃは特許文献１記載の積層型フィルタを示している。例えば２０ｄＢの挿入損失での周波数帯域は第１の実施形態に係る積層型フィルタでは約４６０ＭＨｚ、第５の実施形態に係る積層型フィルタでは約２５０ＭＨｚ、特許文献１記載の積層型フィルタでは１００ＭＨｚである。以上のことから、本発明により減衰特性がより一層向上されることが確認された。   The electrical characteristics of the multilayer filter are shown in FIG. In the figure, the solid line A indicates the multilayer filter according to the first embodiment, the chain line B indicates the multilayer filter according to the fifth embodiment, and the dotted line C indicates the multilayer filter described in Patent Document 1. For example, the frequency band with an insertion loss of 20 dB is approximately 460 MHz in the multilayer filter according to the first embodiment, approximately 250 MHz in the multilayer filter according to the fifth embodiment, and 100 MHz in the multilayer filter described in Patent Document 1. . From the above, it was confirmed that the attenuation characteristics were further improved by the present invention.

本発明は、上述した各実施形態に限定されるものではない。   The present invention is not limited to the above-described embodiments.

例えば、第１〜第４の実施形態及び第６の実施形態に係る積層型フィルタ１では、浮遊容量発生部１５と浮遊容量発生部２０との間に形成された導体部１１を備えていれば、コイル部１０の中心軸線Ｌ方向から見て、コイル部１０により囲まれる内側の領域Ｒを含む形状を有していなくともよい。 For example, in the multilayer filter 1 according to the first to fourth embodiments and the sixth embodiment, if the conductor portion 11 formed between the stray capacitance generation portion 15 and the stray capacitance generation portion 20 is provided. As seen from the direction of the central axis L of the coil portion 10, the shape may not include the inner region R surrounded by the coil portion 10.

また、第４の実施形態に係る積層型フィルタでは、導体部７１と導体部７５との間に設けられた浮遊容量発生部１５１，１５２はどちらか一方が存在していればよく、他方は存在していなくともよい。導体部７２と導体部７６との間に設けられた浮遊容量発生部１５３，１５４に関しても同様である。 Further, in the multilayer filter according to the fourth embodiment, it is sufficient that there is a stray capacitance generating portion 15 1, 15 2 is either provided between the conductor portion 71 and the conductor portion 7 5 The other does not have to exist. The same applies to the conductor portion 7 2 and the stray capacitance generation portion 15 3 which is provided between the conductor portion 7 6, 15 4.

第１の実施形態に係る積層型フィルタを示す斜視図である。1 is a perspective view showing a multilayer filter according to a first embodiment. 第１の実施形態に係る積層型フィルタの積層体を示す分解斜視図である。It is a disassembled perspective view which shows the laminated body of the laminated filter which concerns on 1st Embodiment. 第１の実施形態に係る積層型フィルタの等価回路を説明するための図である。It is a figure for demonstrating the equivalent circuit of the multilayer filter which concerns on 1st Embodiment. 第１の実施形態に係る積層型フィルタの磁束分断の様子を説明するための図である。It is a figure for demonstrating the mode of the magnetic flux division of the multilayer filter which concerns on 1st Embodiment. 第１の実施形態に係る積層型フィルタのコイル部をその中心軸線方向から見た図である。It is the figure which looked at the coil part of the multilayer filter which concerns on 1st Embodiment from the center axis line direction. 第２の実施形態に係る積層型フィルタの積層体を示す分解斜視図である。It is a disassembled perspective view which shows the laminated body of the laminated filter which concerns on 2nd Embodiment. 第３の実施形態に係る積層型フィルタの積層体を示す分解斜視図である。It is a disassembled perspective view which shows the laminated body of the laminated filter which concerns on 3rd Embodiment. 第４の実施形態に係る積層型フィルタの積層体を示す分解斜視図である。It is a disassembled perspective view which shows the laminated body of the laminated filter which concerns on 4th Embodiment. 第５の実施形態に係る積層型フィルタの積層体を示す分解斜視図である。It is a disassembled perspective view which shows the laminated body of the laminated filter which concerns on 5th Embodiment. 第６の実施形態に係る積層型フィルタを示す斜視図である。It is a perspective view which shows the multilayer filter which concerns on 6th Embodiment. 第６の実施形態に係る積層型フィルタの積層体を示す分解斜視図である。It is a disassembled perspective view which shows the laminated body of the laminated filter which concerns on 6th Embodiment. 積層型フィルタの電気的特性を示す線図である。It is a diagram which shows the electrical property of a laminated filter.

符号の説明Explanation of symbols

１・・・積層型フィルタ、２・・・積層体、３・・・端子電極（第１の端子電極）、４・・・端子電極（第２の端子電極）、６１〜６２０・・・絶縁体層、７１〜７７・・・導体部（第１の導体部）、１０・・・コイル部、１１・・・導体部（第４の導体部）、１２１〜１２４・・・導体部（第２の導体部）、１５，１５１〜１５４・・・浮遊容量発生部（第１の浮遊容量発生部）、１６１，１６２，・・・導体部（第３の導体部）、２０，２０１，２０２・・・浮遊容量発生部（第２の浮遊容量発生部）、Ｆ・・・磁束、Ｌ・・・中心軸線、Ｒ・・・領域 1 ... multilayer filter, 2 ... laminate 3 ... terminal electrode (first terminal electrode), 4: terminal electrode (second terminal electrode) 61 through 20 .. · Insulator layer, 7 1 to 7 7 ··· conductor portion (first conductor portion), 10 ··· coil portion, 11 ··· conductor portion (fourth conductor portion), 12 1 to 12 4 · .. Conductor portion (second conductor portion), 15, 15 1 to 15 4 ... Stray capacitance generation portion (first stray capacitance generation portion), 16 1 , 16 2 ,... Conductor portion (third , 20, 20 1 , 20 2 ... Stray capacitance generation portion (second stray capacitance generation portion), F... Magnetic flux, L... Central axis, R.

Claims (1)

複数の絶縁体層が積層されてなる積層体と、
前記積層体に形成された第１の端子電極及び第２の端子電極と、
前記積層体内に形成された複数の第１の導体部が電気的に接続されることにより構成され、一端が前記第１の端子電極に電気的に接続されると共に、他端が前記第２の端子電極に電気的に接続されたコイル部と、
複数の前記第１の導体部との間で浮遊容量を発生させるように前記積層体内に形成されると共に、前記第１の導体部同士の間に配置される第２の導体部を有し、一端が前記第１の端子電極又は前記第２の端子電極の一方に電気的に接続された第１の浮遊容量発生部と、
複数の前記第１の導体部との間で浮遊容量を発生させるように前記積層体内に形成されると共に、前記第１の導体部同士の間に配置される第３の導体部を有し、一端が前記第１の端子電極又は前記第２の端子電極の他方に電気的に接続された第２の浮遊容量発生部と、
前記コイル部が発生する磁束を分断するように、前記積層体内において前記第１の浮遊容量発生部と前記第２の浮遊容量発生部との間に形成された第４の導体部と、
を備え、
前記第２の導体部及び前記第３の導体部は、前記コイル部の中心軸線方向から見て、前記第１の導体部と重なる形状を有し、
前記第４の導体部は、前記コイル部の中心軸線方向から見て、前記コイル部により囲まれる内側の領域を含む形状を有していることを特徴とする積層型フィルタ。
A laminate formed by laminating a plurality of insulator layers;
A first terminal electrode and a second terminal electrode formed in the laminate;
The plurality of first conductor portions formed in the multilayer body are electrically connected, and one end is electrically connected to the first terminal electrode and the other end is the second terminal. A coil part electrically connected to the terminal electrode;
A plurality of the first formed in the laminate to generate stray capacitance between the conductor portion Rutotomoni, a second conductor portion disposed between the adjacent first conductor portion, A first stray capacitance generation unit having one end electrically connected to one of the first terminal electrode or the second terminal electrode;
A plurality of the first formed in the laminate to generate stray capacitance between the conductor portion Rutotomoni has a third conductor portion disposed between the first conductor portions, A second stray capacitance generation unit having one end electrically connected to the other of the first terminal electrode or the second terminal electrode;
A fourth conductor portion formed between the first stray capacitance generation portion and the second stray capacitance generation portion in the stacked body so as to divide the magnetic flux generated by the coil portion;
With
The second conductor portion and the third conductor portion have a shape overlapping the first conductor portion when viewed from the central axis direction of the coil portion,
The multilayer filter, wherein the fourth conductor part has a shape including an inner region surrounded by the coil part when viewed from the central axis direction of the coil part .
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