JPH09289118A - Stacked lc filter - Google Patents

Stacked lc filter

Info

Publication number
JPH09289118A
JPH09289118A JP9998096A JP9998096A JPH09289118A JP H09289118 A JPH09289118 A JP H09289118A JP 9998096 A JP9998096 A JP 9998096A JP 9998096 A JP9998096 A JP 9998096A JP H09289118 A JPH09289118 A JP H09289118A
Authority
JP
Japan
Prior art keywords
coil
filter
external electrode
via holes
capacitor
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.)
Granted
Application number
JP9998096A
Other languages
Japanese (ja)
Other versions
JP3087648B2 (en
Inventor
Yasuhiro Nakada
泰弘 中田
Takahiro Azuma
貴博 東
Hidetoshi Yamamoto
秀俊 山本
Toshimi Kaneko
敏己 金子
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP08099980A priority Critical patent/JP3087648B2/en
Priority to US08/844,644 priority patent/US6133809A/en
Priority to DE19716896A priority patent/DE19716896B4/en
Priority to CN97110803A priority patent/CN1104089C/en
Priority to KR1019970015031A priority patent/KR100278344B1/en
Publication of JPH09289118A publication Critical patent/JPH09289118A/en
Application granted granted Critical
Publication of JP3087648B2 publication Critical patent/JP3087648B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Filters And Equalizers (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a stacked LC filter which exhibits an excellent insertion loss property in a high frequency area and good connection reliability between an outer electrode and a coil. SOLUTION: An inductor part of an LC filter comprises magnetic sheets 12 provided with coil conductors 15a-15d and via holes 22a-22d for repeat respectively, magnetic sheets 12 provided with via holes 21a and 21b for drawing and a magnetic sheet 12 provided with a via hole 22e for connection. The diameter of the via holes 21a and 21b for drawing is larger than that of the via holes 22a-22e for repeat. The coil conductors 15a-15d are connected in series via the via holes 22a-22c for to form a solenoid-type coil. The coil is electrically connected to an outer electrode via the via holes 21a and 21b for drawing.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、積層型LCフィル
タ、特に高周波電子機器から放射されるノイズを除去す
るための積層型LCフィルタに関する。
The present invention relates to a multilayer LC filter, and more particularly to a multilayer LC filter for removing noise radiated from high-frequency electronic equipment.

【0002】[0002]

【従来の技術】従来の積層型LCフィルタとして、例え
ば図8に示すように、複数のコイル導体と磁性体層を積
層して構成したインダクタ部51,52と、このインダ
クタ部51と52の間に挟まれて積み重ねられたコンデ
ンサ部53とを備えたものが知られている。図8は、複
数のコイル導体を電気的に接続して構成したコイル5
4,55を、それぞれインダクタ部51,52内に模式
的に表示している。コイル54,55の軸方向は外部電
極61,62,63,64に対して平行であり、コイル
導体と磁性体層の積層方向も外部電極61〜64に対し
て平行である。なお、図8において、コンデンサ部53
の内部電極は省略している。
2. Description of the Related Art As a conventional laminated LC filter, for example, as shown in FIG. 8, inductor portions 51 and 52 formed by laminating a plurality of coil conductors and magnetic layers, and between the inductor portions 51 and 52 are provided. It is known that the capacitor section 53 is sandwiched between and stacked. FIG. 8 shows a coil 5 formed by electrically connecting a plurality of coil conductors.
4, 55 are schematically shown in the inductor parts 51 and 52, respectively. The axial directions of the coils 54, 55 are parallel to the external electrodes 61, 62, 63, 64, and the stacking direction of the coil conductor and the magnetic layer is also parallel to the external electrodes 61-64. In addition, in FIG.
The internal electrodes of are omitted.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、従来の
積層型LCフィルタにあっては、コイル54,55と外
部電極61〜64間にそれぞれ分布状に大きな浮遊容量
が発生する。これらの大きな浮遊容量はコイル54,5
5にそれぞれ電気的に並列に形成される。従って、浮遊
容量の影響が無視できず、高周波域でLCフィルタの挿
入損失特性が劣化するという問題があった。
However, in the conventional laminated LC filter, large stray capacitances are generated in a distributed manner between the coils 54 and 55 and the external electrodes 61 to 64, respectively. These large stray capacitances are
5 are electrically formed in parallel. Therefore, there is a problem that the influence of the stray capacitance cannot be ignored and the insertion loss characteristic of the LC filter deteriorates in the high frequency range.

【0004】また、外部電極61,62は、それぞれイ
ンダクタ部52,51の端面に露出したコイル55,5
4の引出し部に接続して電気的にコイル55,54に接
続している。しかし、コイル54,55の引出し部の露
出面積が小さい場合、十分な接続信頼性が得られないお
それがある。そこで、本発明の目的は、高周波域での挿
入損失特性が優れ、かつ、外部電極とコイルの接続信頼
性が良い積層型LCフィルタを提供することにある。
Further, the external electrodes 61 and 62 are coils 55 and 5 exposed on the end faces of the inductor portions 52 and 51, respectively.
4 is electrically connected to the coil 55, 54 by being connected to the pull-out portion. However, when the exposed areas of the drawn-out portions of the coils 54 and 55 are small, there is a possibility that sufficient connection reliability cannot be obtained. Therefore, an object of the present invention is to provide a laminated LC filter having excellent insertion loss characteristics in a high frequency range and good connection reliability between an external electrode and a coil.

【0005】[0005]

【課題を解決するための手段】以上の目的を達成するた
め、本発明に係る積層型LCフィルタは、コイル導体相
互を中継用開口部を介して電気的に接続してコイルを構
成し、前記コイルの端部を引出し用開口部を介して電気
的に外部電極に接続すると共に、前記コイルの軸方向を
前記外部電極に対して垂直にし、かつ、前記コイル導体
と前記磁性体層の積層方向を前記外部電極に対して垂直
にし、前記引出し用開口部の面積を前記中継用開口部の
面積より大きくしたことを特徴とする。ここに、中継用
開口部や引出し用開口部としては、具体的にはビアホー
ル等が用いられる。
In order to achieve the above object, in a laminated LC filter according to the present invention, coil conductors are electrically connected to each other through a relay opening to form a coil. The end of the coil is electrically connected to the external electrode through the extraction opening, the axial direction of the coil is perpendicular to the external electrode, and the stacking direction of the coil conductor and the magnetic layer is set. Is perpendicular to the external electrode, and the area of the lead-out opening is larger than the area of the relay opening. Here, a via hole or the like is specifically used as the relay opening or the drawer opening.

【0006】[0006]

【作用】以上の構成により、コイルの軸方向が外部電極
に対して垂直であるため、コイルと外部電極間に発生す
る浮遊容量は小さくなる。なぜなら、コイルと外部電極
間の電位差が小さく、しかも両者の間隔が広いからであ
る。そして、引出し用開口部の面積を中継用開口部の面
積より大きくしているため、外部電極とコイルの接続面
積が大きくなる。
With the above structure, since the axial direction of the coil is perpendicular to the external electrode, the stray capacitance generated between the coil and the external electrode is reduced. This is because the potential difference between the coil and the external electrode is small, and the gap between them is wide. Since the area of the lead-out opening is larger than the area of the relay opening, the connection area between the external electrode and the coil becomes large.

【0007】[0007]

【発明の実施の形態】以下、本発明に係る積層型LCフ
ィルタの一実施形態について添付図面を参照して説明す
る。図1に示すように、積層型LCフィルタ1は、イン
ダクタ部2と3の間にコンデンサ部4を挟んだ構造をし
ている。フィルタ1の左右の側面にはそれぞれ入力外部
電極5及び出力外部電極6が設けられ、手前側及び奥側
の側面にはそれぞれグランド外部電極7,8が設けられ
ている。
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a laminated LC filter according to the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the laminated LC filter 1 has a structure in which a capacitor section 4 is sandwiched between inductor sections 2 and 3. An input external electrode 5 and an output external electrode 6 are provided on the left and right side surfaces of the filter 1, and ground external electrodes 7 and 8 are provided on the front and back side surfaces, respectively.

【0008】図2(模式的に示す)に示すように、フィ
ルタ1はインダクタ部2,3にそれぞれ内蔵されている
コイル16,17の軸方向が外部電極5,6に対して垂
直である。コイル16,17の一方の端部は、それぞれ
入力外部電極5及び出力外部電極6に電気的に接続され
ている。さらに、図3〜図5を参照してフィルタ1の構
造について詳説する。
As shown in FIG. 2 (schematically), in the filter 1, the axial directions of the coils 16 and 17 incorporated in the inductor portions 2 and 3 are perpendicular to the external electrodes 5 and 6, respectively. One ends of the coils 16 and 17 are electrically connected to the input external electrode 5 and the output external electrode 6, respectively. Further, the structure of the filter 1 will be described in detail with reference to FIGS.

【0009】図3に示すように、インダクタ部2は、コ
イル導体15a,15b,15c,15d及び中継用ビ
アホール22a,22b,22c,22dをそれぞれ設
けた磁性体シート12、引出し用ビアホール21a,2
1bをそれぞれ設けた磁性体シート12、中継用ビアホ
ール22eを設けた磁性体シート12等にて構成されて
いる。磁性体シート12はフェライト等の磁性体粉末を
結合剤等と共に混練したものをシート状にしたものであ
る。
As shown in FIG. 3, the inductor portion 2 includes a magnetic material sheet 12 provided with coil conductors 15a, 15b, 15c and 15d and relay via holes 22a, 22b, 22c and 22d, and lead-out via holes 21a and 2d.
The magnetic sheet 12 is provided with 1b and the magnetic sheet 12 is provided with a relay via hole 22e. The magnetic sheet 12 is a sheet obtained by kneading magnetic powder such as ferrite with a binder or the like.

【0010】引出し用ビアホール21a,21bの径は
中継用ビアホール22a〜22eの径より大きく設定さ
れている。具体的には、例えば引出し用ビアホール21
a,21bの径を200〜300μm、中継用ビアホー
ル22a〜22eの径を100〜200μmに設計す
る。中継用ビアホール22a〜22dは、それぞれコイ
ル導体15a〜15dと共に同一シート12に設けられ
るため、中継用ビアホール22a〜22dがシート12
に占める面積は制限され、中継用ビアホール22a〜2
2dの大径化は規制される。これに対して、引出し用ビ
アホール21a,21bは、シート12面に他の導体等
が設けられていないため、大径化を規制されることなく
実行することができる(同様の理由で、後述の引出し用
ビアホール21c,21dも大径化を実行することがで
きる)。
The diameters of the lead-out via holes 21a and 21b are set to be larger than the diameters of the relay via holes 22a to 22e. Specifically, for example, the pull-out via hole 21
The diameters of a and 21b are designed to be 200 to 300 μm, and the diameters of the relay via holes 22a to 22e are designed to be 100 to 200 μm. Since the relay via holes 22a to 22d are provided on the same sheet 12 together with the coil conductors 15a to 15d, the relay via holes 22a to 22d are formed on the sheet 12.
The area occupied by the relay via holes 22a-2a is limited.
Increasing the diameter of 2d is restricted. On the other hand, since the lead-out via holes 21a and 21b are not provided with other conductors or the like on the surface of the sheet 12, it is possible to increase the diameter without being restricted (for the same reason, a description will be given later. The diameters of the extraction via holes 21c and 21d can also be increased).

【0011】図4に示すように、コンデンサ部4は、コ
イル導体15e,15gをそれぞれ設けた誘電体シート
13、コンデンサ電極16a,16cをそれぞれ設けた
誘電体シート13,コイル導体15fとこのコイル導体
15fの中央部に電気的に接続しているコンデンサ電極
16bを設けた誘電体シート13,中継用ビアホール2
2h,22j,22l,22nをそれぞれ設けた誘電体
シート13等にて構成されている。コンデンサ電極16
a,16cのそれぞれの一端部はシート13の手前側の
辺に露出しており、他端部はシート13の奥側の辺に露
出している。誘電体シート13は、誘電体粉末を結合剤
等と共に混練したものをシート状にしたものである。
As shown in FIG. 4, the capacitor section 4 includes a dielectric sheet 13 provided with coil conductors 15e and 15g, a dielectric sheet 13 provided with capacitor electrodes 16a and 16c, a coil conductor 15f, and this coil conductor. Dielectric sheet 13 provided with capacitor electrode 16b electrically connected to the central portion of 15f, relay via hole 2
The dielectric sheet 13 is provided with 2h, 22j, 22l, and 22n, respectively. Capacitor electrode 16
One end of each of a and 16c is exposed on the front side of the seat 13, and the other end is exposed on the back side of the seat 13. The dielectric sheet 13 is obtained by kneading a dielectric powder with a binder or the like to form a sheet.

【0012】図5に示すように、インダクタ部3は、コ
イル導体15h,15i,15j,15k及び中継用ビ
アホール22r,22s,22t,22uをそれぞれ設
けた磁性体シート12、引出し用ビアホール21c,2
1dをそれぞれ設けた磁性体シート12、中継用ビアホ
ール22qを設けた磁性体シート12等にて構成されて
いる。引出し用ビアホール21c,21dの径は、中継
用ビアホール22q〜22uの径より大きく設定されて
いる。
As shown in FIG. 5, the inductor portion 3 includes a magnetic material sheet 12 provided with coil conductors 15h, 15i, 15j, 15k and relay via holes 22r, 22s, 22t, 22u, and pull-out via holes 21c, 2 respectively.
The magnetic material sheet 12 is provided with 1d, the magnetic material sheet 12 is provided with a relay via hole 22q, and the like. The diameters of the lead-out via holes 21c and 21d are set to be larger than the diameters of the relay via holes 22q to 22u.

【0013】インダクタ部2とコンデンサ部4の間、並
びにインダクタ部3とコンデンサ部4の間には、それぞ
れ中間用絶縁体シート14が配設されている。この中間
用絶縁体シート14はインダクタ部2,3の熱膨張係数
とコンデンサ部4の熱膨張係数の違いに起因する剥れや
クラックの発生を防止する。このため、中間用絶縁体シ
ート14は、例えば磁性体と絶縁体の混合粉末を結合剤
等と共に混練し、シート状にしている。
Intermediate insulator sheets 14 are provided between the inductor portion 2 and the capacitor portion 4, and between the inductor portion 3 and the capacitor portion 4, respectively. The intermediate insulating sheet 14 prevents the occurrence of peeling or cracking due to the difference between the thermal expansion coefficient of the inductor portions 2 and 3 and the thermal expansion coefficient of the capacitor portion 4. Therefore, the intermediate insulating sheet 14 is formed into a sheet by kneading, for example, a mixed powder of a magnetic material and an insulating material together with a binder and the like.

【0014】コイル導体15a〜15f(ただし、コイ
ル導体15fは下側半分)は、シート12,13,14
にそれぞれ設けた中継用ビアホール22a〜22jを介
して直列に電気的に接続され、ソレノイド状のコイル1
6を形成する。コイル導体15f〜15k(ただし、コ
イル導体15fは上側半分)は、シート12,13,1
4にそれぞれ設けた中継用ビアホール22k〜22tを
介して直列に電気的に接続され、ソレノイド状のコイル
17を形成する。
The coil conductors 15a to 15f (however, the coil conductor 15f is the lower half) are formed by the sheets 12, 13 and 14.
Are electrically connected in series via relay via holes 22a to 22j respectively provided in the solenoid coil 1
6 is formed. The coil conductors 15f to 15k (however, the coil conductor 15f is the upper half) are the sheets 12, 13, 1
4 are electrically connected in series through the relay via holes 22k to 22t provided in each of the No. 4 to form the solenoid coil 17.

【0015】コンデンサ電極16bは、コンデンサ電極
16a及び16cに対向し、これらのコンデンサ電極1
6a〜16cにてコンデンサ18を形成する。コイル導
体15a〜15kやコンデンサ電極16a〜16cは、
Ag,Pd,Ag−Pd,Cu等からなり、シート1
2,13,14の表面に、周知の印刷法やスパッタリン
グ法や真空蒸着法等の方法によって形成される。
The capacitor electrode 16b faces the capacitor electrodes 16a and 16c, and these capacitor electrode 1
The capacitor 18 is formed by 6a to 16c. The coil conductors 15a to 15k and the capacitor electrodes 16a to 16c are
Sheet 1 made of Ag, Pd, Ag-Pd, Cu, etc.
It is formed on the surfaces of 2, 13, and 14 by a known printing method, sputtering method, vacuum deposition method, or the like.

【0016】各シート12,13,14は積み重ねら
れ、一体的に焼結されることにより、図1に示したイン
ダクタ部2と3でコンデンサ部4を挟んだ構造の積層体
とされる。次に、積層体の左右の両側面部にそれぞれ入
力外部電極5及び出力外部電極6が形成され、積層体の
手前側の側面部及び奥側の側面部にそれぞれグランド外
部電極7,8が形成される。これら外部電極5〜8はス
パッタリング法、真空蒸着、あるいは印刷焼付等の手段
にて形成する。
The sheets 12, 13, 14 are stacked and integrally sintered to form a laminated body having a structure in which the inductor portion 2 and 3 shown in FIG. 1 sandwich the capacitor portion 4. Next, the input external electrode 5 and the output external electrode 6 are formed on both left and right side surface portions of the laminated body, and the ground external electrodes 7 and 8 are formed on the front side surface portion and the rear side surface portion of the laminated body, respectively. It These external electrodes 5 to 8 are formed by a method such as a sputtering method, vacuum deposition, printing or printing.

【0017】入力外部電極5は、引出し用ビアホール2
1a,21bを介して、コイル16の一方の端部、具体
的にはコイル導体15aの端部に電気的に接続してい
る。出力外部電極6は、引出し用ビアホール21c,2
1dを介して、コイル17の一方の端部、具体的にはコ
イル導体15kの端部に電気的に接続している。さら
に、グランド外部電極7はコンデンサ電極16a,16
cのそれぞれの一端部に電気的に接続し、グランド外部
電極8はコンデンサ電極16a,16cのそれぞれの他
端部に電気的に接続している。図6はLCフィルタ1の
電気等価回路図である。
The input external electrode 5 is connected to the extraction via hole 2.
It is electrically connected to one end of the coil 16, specifically, the end of the coil conductor 15a via 1a and 21b. The output external electrode 6 has lead-out via holes 21c, 2
It is electrically connected to one end of the coil 17, specifically, the end of the coil conductor 15k via 1d. Further, the ground external electrode 7 is connected to the capacitor electrodes 16a, 16
The ground external electrode 8 is electrically connected to one end of each of the capacitors c, and the ground external electrode 8 is electrically connected to the other end of each of the capacitor electrodes 16a and 16c. FIG. 6 is an electrical equivalent circuit diagram of the LC filter 1.

【0018】こうして得られたLCフィルタ1は、シー
ト12,13,14の積み重ね方向が外部電極5〜8に
対して垂直であり、コイル16,17の軸方向が外部電
極5,6に対して垂直である。従って、コイル16,1
7と外部電極5〜8間にそれぞれ分布状に発生する浮遊
容量は、コイル16と入力外部電極5間並びにコイル1
7と出力外部電極6間の電位差が小さく、かつ、コイル
16と出力外部電極6の間隔並びにコイル17と入力外
部電極5の間隔が広いため、極めて小さくなる。この結
果、浮遊容量の影響は実用上無視でき、高周波域での挿
入損失特性が優れたLCフィルタ1が得られる。
In the LC filter 1 thus obtained, the stacking direction of the sheets 12, 13, and 14 is perpendicular to the external electrodes 5 to 8, and the axial direction of the coils 16 and 17 is to the external electrodes 5 and 6. Vertical. Therefore, the coils 16, 1
7 and the external electrodes 5 to 8 are distributed in a stray capacitance between the coil 16 and the input external electrode 5 and the coil 1.
Since the potential difference between 7 and the output external electrode 6 is small, and the distance between the coil 16 and the output external electrode 6 and the distance between the coil 17 and the input external electrode 5 are wide, it is extremely small. As a result, the influence of the stray capacitance can be practically ignored, and the LC filter 1 having excellent insertion loss characteristics in the high frequency range can be obtained.

【0019】さらに、入力用外部電極5とコイル16
は、径が大きい引出し用ビアホール21a,21bを介
して電気的に接続しているので、入力外部電極5とコイ
ル16の接続面積が大きくなり、接続信頼性を向上させ
たり、入力外部電極5とコイル16との接続直流抵抗を
小さくすることができる。同様の理由で、出力外部電極
6とコイル17の接続信頼性の向上や接続直流抵抗を小
さくすることができる。
Further, the input external electrode 5 and the coil 16
Are electrically connected via the large-diameter lead-out via holes 21a and 21b, the connection area between the input external electrode 5 and the coil 16 is increased, and the connection reliability is improved or the input external electrode 5 is connected. The connection DC resistance with the coil 16 can be reduced. For the same reason, the connection reliability between the output external electrode 6 and the coil 17 can be improved and the connection DC resistance can be reduced.

【0020】なお、本発明に係る積層型LCフィルタは
前記実施形態に限定するものではなく、その要旨の範囲
内で種々に変更することができる。前記実施形態では、
引出し用ビアホールを設けたシートを2枚用いて外部電
極とコイルの電気的接続を行なっているが、外部電極に
直接接続する引出し用ビアホールを大径のまま残して、
他の引出し用ビアホールの径を中継用ビアホールと等し
い径にしたものであってもよい。
The laminated LC filter according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of the gist thereof. In the above embodiment,
Although the electrical connection between the external electrode and the coil is made by using two sheets provided with the extraction via hole, the extraction via hole directly connected to the external electrode is left with a large diameter,
The diameter of another lead-out via hole may be the same as that of the relay via hole.

【0021】また、コンデンサ部は、中継用ビアホール
のみを設けた誘電体シートを複数枚積層して構成したも
のであってもよい。この場合、中継用ビアホールを連接
して、コンデンサ部内に構成したビア導体とグランド外
部電極との間に分布容量が形成され、コンデンサを得
る。あるいは、コンデンサ部は、コンデンサ電極と中継
用ビアホールのみを設けた誘電体シートを複数枚積層し
て構成したものであってもよい。さらに、コンデンサ部
は、前記実施形態において、例えば図7に示すように、
コイル導体15gとこのコイル導体15gに近接した内
部グランド電極30を設けた誘電体シート13を複数枚
積層して構成したものであってもよい。この場合、内部
グランド電極30はグランド外部電極7に電気的に接続
され、コイル導体15gは中継用ビアホール22o等に
て直列に接続されてソレノイド状のコイルをコンデンサ
部内に形成する。そして、このソレノイド状のコイルと
内部電極30との間に分布容量が形成され、コンデンサ
を得る。
Further, the capacitor section may be formed by laminating a plurality of dielectric sheets provided with only relay via holes. In this case, the relay via hole is connected to form a distributed capacitance between the via conductor formed in the capacitor portion and the ground external electrode to obtain a capacitor. Alternatively, the capacitor section may be configured by laminating a plurality of dielectric sheets provided with only capacitor electrodes and relay via holes. Furthermore, in the above-described embodiment, the capacitor unit is, for example, as shown in FIG.
It may be configured by laminating a plurality of dielectric sheets 13 provided with the coil conductor 15g and the internal ground electrode 30 adjacent to the coil conductor 15g. In this case, the inner ground electrode 30 is electrically connected to the ground outer electrode 7, and the coil conductor 15g is connected in series through the relay via hole 22o or the like to form a solenoid coil in the capacitor portion. Then, a distributed capacitance is formed between the solenoidal coil and the internal electrode 30 to obtain a capacitor.

【0022】また、前記実施形態では、インダクタ部−
コンデンサ部−インダクタ部からなるものを説明した
が、この他に、インダクタ部−コンデンサ部からなるL
Cフィルタ、インダクタ部−コンデンサ部−インダクタ
部−コンデンサ部−インダクタ部からなるLCフィルタ
等であってもよい。また、コンデンサ部に抵抗体を内蔵
させたり、あるいは新たに絶縁体層を積層してその絶縁
体層に抵抗体を内蔵させたLC複合部品であってもよ
い。
In the above embodiment, the inductor section-
Although the capacitor part-inductor part has been described, in addition to this, the inductor part-capacitor part L
The filter may be a C filter, an LC filter including an inductor section, a capacitor section, an inductor section, a capacitor section, and an inductor section. Further, it may be an LC composite component in which a resistor is built in the capacitor portion, or an insulator layer is newly laminated and the resistor is built in the insulator layer.

【0023】また、前記実施形態は、それぞれ導体が形
成された磁性体シート及び誘電体シートを積み重ねた
後、一体的に焼成するものであるが、必ずしもこれに限
定されない。シートは予め焼結されたものを用いてもよ
い。また、以下に説明する製法によってLCフィルタを
作成してもよい。印刷等の手段によりペースト状の磁性
体材料を塗布して磁性体層を形成した後、その磁性体層
の表面にペースト状の導電体材料を塗布して任意の導体
を形成する。次に、ペースト状の磁性体材料を前記導体
の上から塗布して導体が内蔵された磁性体層とする。同
様にして、この磁性体層の上に導体が内蔵された誘電体
層を形成する。こうして順に重ね塗りすることによって
積層構造を有するLCフィルタが得られる。
Further, in the above-mentioned embodiment, the magnetic sheet and the dielectric sheet each having the conductor formed thereon are stacked and then integrally fired, but the present invention is not necessarily limited to this. The sheet may be a sheet sintered in advance. Further, an LC filter may be created by a manufacturing method described below. After a paste-like magnetic material is applied by printing or the like to form a magnetic layer, a paste-like conductive material is applied to the surface of the magnetic layer to form an arbitrary conductor. Next, a paste-like magnetic material is applied over the conductor to form a magnetic layer in which the conductor is embedded. Similarly, a dielectric layer containing a conductor is formed on the magnetic layer. In this way, an LC filter having a laminated structure can be obtained by successively coating.

【0024】また、得られるLCフィルタの等価回路は
T形に限らず、π形、L形であってもよい。
The equivalent circuit of the obtained LC filter is not limited to the T type, but may be a π type or an L type.

【0025】[0025]

【発明の効果】以上の説明で明らかなように、本発明に
よれば、コイルの軸方向を外部電極に対して垂直にした
ので、コイルと外部電極間に発生する浮遊容量を極小化
でき、高周波域での挿入損失特性が優れた積層型LCフ
ィルタを得ることができる。そして、引出し用開口部の
面積を中継用開口部の面積より大きく設定しているの
で、外部電極とコイルの接続信頼性が向上すると共に、
外部電極とコイルの接続直流抵抗を小さくすることがで
きる。
As is apparent from the above description, according to the present invention, the axial direction of the coil is perpendicular to the external electrode, so that the stray capacitance generated between the coil and the external electrode can be minimized. A laminated LC filter having excellent insertion loss characteristics in the high frequency range can be obtained. Since the area of the opening for drawing is set to be larger than the area of the opening for relay, the connection reliability between the external electrode and the coil is improved, and
The direct current resistance between the external electrode and the coil can be reduced.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る積層型LCフィルタの外観を示す
斜視図。
FIG. 1 is a perspective view showing the appearance of a laminated LC filter according to the present invention.

【図2】図1に示した積層型LCフィルタの内部透視
図。
FIG. 2 is an internal perspective view of the laminated LC filter shown in FIG.

【図3】図1に示した積層型LCフィルタの一方のイン
ダクタ部の分解斜視図。
3 is an exploded perspective view of one inductor portion of the laminated LC filter shown in FIG.

【図4】図1に示した積層型LCフィルタのコンデンサ
部の分解斜視図。
4 is an exploded perspective view of a capacitor section of the laminated LC filter shown in FIG.

【図5】図1に示した積層型LCフィルタの他方のイン
ダクタ部の分解斜視図。
5 is an exploded perspective view of the other inductor section of the laminated LC filter shown in FIG.

【図6】図1に示した積層型LCフィルタの電気等価回
路図。
FIG. 6 is an electrical equivalent circuit diagram of the laminated LC filter shown in FIG.

【図7】他の実施形態を示す誘電体シートの斜視図。FIG. 7 is a perspective view of a dielectric sheet showing another embodiment.

【図8】従来の積層型LCフィルタの内部透視図。FIG. 8 is an internal perspective view of a conventional laminated LC filter.

【符号の説明】[Explanation of symbols]

1…LCフィルタ 2,3…インダクタ部 4…コンデンサ部 5…入力外部電極 6…出力外部電極 7,8…グランド外部電極 12…磁性体シート 15a〜15k…コイル導体 16,17…コイル 21a〜21d…引出し用ビアホール 22a〜22u…中継用ビアホール DESCRIPTION OF SYMBOLS 1 ... LC filter 2, 3 ... Inductor part 4 ... Capacitor part 5 ... Input external electrode 6 ... Output external electrode 7, 8 ... Ground external electrode 12 ... Magnetic sheet 15a-15k ... Coil conductor 16, 17 ... Coil 21a-21d ... Drawer via holes 22a-22u ... Relay via holes

フロントページの続き (72)発明者 金子 敏己 京都府長岡京市天神二丁目26番10号 株式 会社村田製作所内Front Page Continuation (72) Inventor Toshimi Kaneko 2 26-10 Tenjin Tenjin, Nagaokakyo, Kyoto Murata Manufacturing Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 複数のコイル導体と磁性体層を積層して
構成したインダクタ部と、前記インダクタ部に積層され
るコンデンサ部とを備えた積層型LCフィルタにおい
て、 前記コイル導体相互を中継用開口部を介して電気的に接
続してコイルを構成し、前記コイルの端部を引出し用開
口部を介して電気的に外部電極に接続すると共に、前記
コイルの軸方向を前記外部電極に対して垂直にし、か
つ、前記コイル導体と前記磁性体層の積層方向を前記外
部電極に対して垂直にし、前記引出し用開口部の面積を
前記中継用開口部の面積より大きくしたことを特徴とす
る積層型LCフィルタ。
1. A laminated LC filter comprising an inductor portion formed by laminating a plurality of coil conductors and a magnetic layer, and a capacitor portion laminated on the inductor portion, wherein the coil conductors are interconnected with relay openings. To electrically connect to the external electrode via the extraction opening, and the axial direction of the coil with respect to the external electrode. A stack in which the coil conductor and the magnetic layer are stacked vertically to the external electrode, and the area of the lead-out opening is larger than the area of the relay opening. Type LC filter.
JP08099980A 1996-04-22 1996-04-22 Laminated LC filter Expired - Lifetime JP3087648B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP08099980A JP3087648B2 (en) 1996-04-22 1996-04-22 Laminated LC filter
US08/844,644 US6133809A (en) 1996-04-22 1997-04-21 LC filter with a parallel ground electrode
DE19716896A DE19716896B4 (en) 1996-04-22 1997-04-22 LC filter
CN97110803A CN1104089C (en) 1996-04-22 1997-04-22 LC filter
KR1019970015031A KR100278344B1 (en) 1996-04-22 1997-04-22 LC Filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP08099980A JP3087648B2 (en) 1996-04-22 1996-04-22 Laminated LC filter

Publications (2)

Publication Number Publication Date
JPH09289118A true JPH09289118A (en) 1997-11-04
JP3087648B2 JP3087648B2 (en) 2000-09-11

Family

ID=14261821

Family Applications (1)

Application Number Title Priority Date Filing Date
JP08099980A Expired - Lifetime JP3087648B2 (en) 1996-04-22 1996-04-22 Laminated LC filter

Country Status (1)

Country Link
JP (1) JP3087648B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000306737A (en) * 1999-03-11 2000-11-02 Alcatel Radio-frequency current transformer and use thereof
JP2002175916A (en) * 2000-12-07 2002-06-21 Murata Mfg Co Ltd Inductor
JP2002270465A (en) * 2001-03-08 2002-09-20 Soshin Electric Co Ltd Terminal electrode of laminate electronic component
KR100370670B1 (en) * 1998-07-06 2003-02-05 티디케이가부시기가이샤 Inductor element and manufacturing method thereof
KR100552010B1 (en) * 1998-02-02 2006-02-17 다이요 유덴 가부시키가이샤 Multilayer electronic component and manufacturing method therefor
JP2011049491A (en) * 2009-08-28 2011-03-10 Tdk Corp Multilayer electronic component
JP2015106574A (en) * 2013-11-28 2015-06-08 Necトーキン株式会社 Inductance element
JP2015111799A (en) * 2013-10-30 2015-06-18 株式会社村田製作所 Electronic component

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100552010B1 (en) * 1998-02-02 2006-02-17 다이요 유덴 가부시키가이샤 Multilayer electronic component and manufacturing method therefor
KR100370670B1 (en) * 1998-07-06 2003-02-05 티디케이가부시기가이샤 Inductor element and manufacturing method thereof
JP2000306737A (en) * 1999-03-11 2000-11-02 Alcatel Radio-frequency current transformer and use thereof
JP2002175916A (en) * 2000-12-07 2002-06-21 Murata Mfg Co Ltd Inductor
JP2002270465A (en) * 2001-03-08 2002-09-20 Soshin Electric Co Ltd Terminal electrode of laminate electronic component
JP2011049491A (en) * 2009-08-28 2011-03-10 Tdk Corp Multilayer electronic component
JP2015111799A (en) * 2013-10-30 2015-06-18 株式会社村田製作所 Electronic component
US9479136B2 (en) 2013-10-30 2016-10-25 Murata Manufacturing Co., Ltd. Electronic component
JP2015106574A (en) * 2013-11-28 2015-06-08 Necトーキン株式会社 Inductance element

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