JP2669193B2 - LC resonator - Google Patents
LC resonatorInfo
- Publication number
- JP2669193B2 JP2669193B2 JP3160519A JP16051991A JP2669193B2 JP 2669193 B2 JP2669193 B2 JP 2669193B2 JP 3160519 A JP3160519 A JP 3160519A JP 16051991 A JP16051991 A JP 16051991A JP 2669193 B2 JP2669193 B2 JP 2669193B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- electrode
- resonator
- capacitor
- coil conductor
- 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.)
- Expired - Fee Related
Links
- 239000004020 conductor Substances 0.000 claims description 23
- 239000003990 capacitor Substances 0.000 claims description 19
- 239000000758 substrate Substances 0.000 description 14
- 238000000605 extraction Methods 0.000 description 5
- 229920001721 polyimide Polymers 0.000 description 3
- 239000009719 polyimide resin Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Coils Or Transformers For Communication (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Filters And Equalizers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、フィルタ回路や発振回
路等に使用されるＬＣ共振子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LC resonator used for a filter circuit, an oscillation circuit and the like.
【０００２】[0002]
【従来の技術と課題】一般に、コンデンサ部品とコイル
部品を組み合わせてＬＣ共振回路を構成することが行わ
れている。この場合、使用されるコイル部品としては、
アルミナ基板の表面に渦巻き形状のコイル用導体を設け
た薄膜コイル部品が知られている。このコイル部品に電
流を流すと、実装面と垂直な方向に磁界が発生する。従
って、このコイル部品を印刷配線板等の一方の面に実装
したとき、該コイル部品が実装された部分の他方の面に
グランド電極や信号電極等が配設されていると、これら
の電極にコイル部品に発生した磁界によって渦電流が発
生するので、コイル部品のインダクタンスＬや良好度Ｑ
が正規の数値からずれ、ＬＣ共振回路において所望の共
振特性が得られないという問題があった。2. Description of the Related Art Generally, an LC resonant circuit is constructed by combining a capacitor component and a coil component. In this case, the coil components used are:
2. Description of the Related Art A thin-film coil component in which a spiral coil conductor is provided on the surface of an alumina substrate is known. When a current is applied to this coil component, a magnetic field is generated in a direction perpendicular to the mounting surface. Therefore, when this coil component is mounted on one surface of a printed wiring board or the like, if a ground electrode, a signal electrode, or the like is provided on the other surface of the portion where the coil component is mounted, these electrodes are Since an eddy current is generated by the magnetic field generated in the coil component, the inductance L of the coil component and the quality factor Q
Is deviated from a regular value, and a desired resonance characteristic cannot be obtained in the LC resonance circuit.
【０００３】また、別々のコンデンサ部品とコイル部品
を組み合わせて共振回路を構成することは、その分実装
作業が増え手間がかかっていた。そこで、本発明の課題
は、共振特性が印刷配線板等への実装状態に影響され
ず、かつ、実装作業が簡略なＬＣ共振子を提供すること
にある。Further, it has been time-consuming and time-consuming to construct a resonant circuit by combining separate capacitor parts and coil parts. Therefore, an object of the present invention is to provide an LC resonator whose resonance characteristics are not affected by the mounting state on a printed wiring board or the like and whose mounting operation is simple.
【０００４】[0004]
【課題を解決するための手段と作用】以上の課題を解決
するため、本発明に係るＬＣ共振子は、コンデンサ部を
実装面側に配置してコイル部とコンデンサ部を積み重
ね、前記コイル部のコイル用導体を設けた領域が前記コ
ンデンサ部の容量電極の少なくとも一つを設けた領域の
範囲内に位置していることを特徴とする。In order to solve the above problems, in the LC resonator according to the present invention, the capacitor section is disposed on the mounting surface side and the coil section and the capacitor section are stacked to form the coil section of the coil section. The region in which the coil conductor is provided is located within the region in which at least one of the capacitor electrodes of the capacitor section is provided.
【０００５】コンデンサ部とコイル部を組み合わせて積
層一体構造にすることにより、実装作業が簡略となる。
また、コンデンサ部が実装面側に配置され、かつ、コイ
ル用導体を設けた領域が容量電極の少なくとも一つを設
けた領域の範囲内に位置しているため、コイル用導体は
容量電極によって印刷配線板等に配設されているグラン
ド電極や信号電極から遮蔽された状態となる。従って、
コイル用導体に電流を流したときに発生する磁界が、グ
ランド電極や信号電極に渦電流等を発生させるおそれが
なくなり、コイル部のインダクタンスＬや良好度Ｑが正
規の数値からずれなくなる。[0005] The mounting operation is simplified by combining the capacitor portion and the coil portion into a laminated integrated structure.
Also, since the capacitor portion is arranged on the mounting surface side and the area where the coil conductor is provided is located within the area where at least one of the capacitor electrodes is provided, the coil conductor is printed by the capacitor electrode. It is in a state of being shielded from the ground electrode and the signal electrode provided on the wiring board or the like. Therefore,
The magnetic field generated when a current is passed through the coil conductor eliminates the possibility of generating an eddy current or the like in the ground electrode or the signal electrode, and the inductance L and the goodness Q of the coil portion do not deviate from the normal numerical values.
【０００６】[0006]
【実施例】以下、本発明に係るＬＣ共振子の一実施例を
添付図面を参照して説明する。本実施例では、ＬＣ共振
子１個の場合について説明するが、量産時は複数個のＬ
Ｃ共振子を備えたマザー基板の形態で製造されることに
なる。図１はＬＣ共振子の垂直断面図であり、図２は図
１に示したＬＣ共振子の内部の平面図である。誘電体基
板１の表裏面には容量電極２，３が設けられている。容
量電極２の一方の端部は誘電体基板１の左端面に延在し
ており、容量電極３の一方の端部は誘電体基板１の右端
面に延在している。この誘電体基板１は容量電極３を形
成した側の面を実装面Ａとして使用されることになる。
この誘電体基板１は、アルミナ又はガラスからなる基板
５にポリイミド樹脂系接着剤等を用いて貼り合わされて
いる。An embodiment of the LC resonator according to the present invention will be described below with reference to the accompanying drawings. In the present embodiment, the case of one LC resonator will be described.
It will be manufactured in the form of a mother substrate with a C resonator. 1 is a vertical cross-sectional view of the LC resonator, and FIG. 2 is a plan view of the inside of the LC resonator shown in FIG. Capacitance electrodes 2 and 3 are provided on the front and back surfaces of the dielectric substrate 1. One end of the capacitance electrode 2 extends to the left end face of the dielectric substrate 1, and one end of the capacitance electrode 3 extends to the right end face of the dielectric substrate 1. The surface of the dielectric substrate 1 on which the capacitor electrode 3 is formed is used as the mounting surface A.
This dielectric substrate 1 is attached to a substrate 5 made of alumina or glass by using a polyimide resin adhesive or the like.
【０００７】さらに、この基板５の表面中央部、左縁部
及び右縁部にそれぞれ渦巻き形状のコイル用導体８、引
出し電極９ａ及び引出し電極９ｂがスパッタ法やフォト
レジスト法等の手段にて形成される。ここに、コイル用
導体８は容量電極２，３を設けた領域の範囲内に配設さ
れるように設計されている。コイル用導体８の一方の端
部は引出し電極９ａに電気的に接続している。コイル用
導体８及び引出し電極９ａ，９ｂを形成した後、ポリイ
ミド樹脂等の絶縁膜１２がコイル用導体８の一部を被覆
するべく局所的に基板５の表面に設けられる。この絶縁
膜１２の表面にコイル用導体８の他方の端部と引出し電
極９ｂを電気的に接続する接続導体１５が配設されてい
る。Further, a spiral coil conductor 8, a lead electrode 9a, and a lead electrode 9b are formed on the central portion, the left edge portion, and the right edge portion of the surface of the substrate 5 by means such as a sputtering method or a photoresist method. To be done. Here, the coil conductor 8 is designed so as to be arranged within the range of the region where the capacitance electrodes 2 and 3 are provided. One end of the coil conductor 8 is electrically connected to the extraction electrode 9a. After forming the coil conductor 8 and the extraction electrodes 9a and 9b, an insulating film 12 such as a polyimide resin is locally provided on the surface of the substrate 5 so as to cover a part of the coil conductor 8. A connection conductor 15 is provided on the surface of the insulating film 12 to electrically connect the other end of the coil conductor 8 and the extraction electrode 9b.
【０００８】コイル用導体８や容量電極３等はポリイミ
ド樹脂等の絶縁体層１６，１７にて被覆されている。な
お、量産時は、この後マザー基板を製品毎に切り離すこ
とになる。誘電体基板１と基板５からなる積層体の左右
両端部に外部電極２０，２１がスパッタ等の手段にて設
けられている。外部電極２０は容量電極２及び引出し電
極９ａに電気的に接続しており、外部電極２１は容量電
極３及び引出し電極９ｂに電気的に接続している。図３
はこうして得られたＬＣ共振子の電気等価回路図であ
る。ここに、Ｃは容量電極２と３の間に発生するキャパ
シタンスであり、Ｌはコイル用導体８に発生するインダ
クタンスである。The coil conductor 8, the capacitance electrode 3 and the like are covered with insulating layers 16 and 17 made of polyimide resin or the like. At the time of mass production, the mother substrate is thereafter separated for each product. External electrodes 20 and 21 are provided on both left and right ends of a laminated body including the dielectric substrate 1 and the substrate 5 by means such as sputtering. The external electrode 20 is electrically connected to the capacitance electrode 2 and the extraction electrode 9a, and the external electrode 21 is electrically connected to the capacitance electrode 3 and the extraction electrode 9b. FIG.
FIG. 4 is an electrical equivalent circuit diagram of the LC resonator thus obtained. Here, C is a capacitance generated between the capacitance electrodes 2 and 3, and L is an inductance generated in the coil conductor 8.
【０００９】このＬＣ共振子はコンデンサ部とコイル部
を組み合わせて一体積層構造にしているので従来の別々
の部品を実装する場合と比較して実装作業が容易であ
る。また、ＬＣ共振子は実装面Ａ（図１参照）を下にし
て印刷配線板等（図示せず）に実装される。そして、コ
イル用導体８は容量電極２，３によって印刷配線板等に
配設されているグランド電極や信号電極から遮蔽された
状態となる。従って、コイル用導体８に電流を流した際
に実装面に対して垂直な方向に発生する磁界が、グラン
ド電極や信号電極に渦電流等を発生させるおそれがなく
なり、コイル部のインダクタンスＬや良好度Ｑが正規の
数値からずれなくなる。この結果、共振特性が印刷配線
板等への実装状態に影響されないＬＣ共振子が得られ
る。Since this LC resonator has an integrally laminated structure by combining the capacitor part and the coil part, the mounting work is easier than the conventional case where separate parts are mounted. The LC resonator is mounted on a printed wiring board or the like (not shown) with the mounting surface A (see FIG. 1) facing down. Then, the coil conductor 8 is shielded by the capacitance electrodes 2 and 3 from the ground electrode and the signal electrode arranged on the printed wiring board or the like. Therefore, when a current is passed through the coil conductor 8, the magnetic field generated in the direction perpendicular to the mounting surface does not cause an eddy current or the like in the ground electrode or the signal electrode, and the inductance L of the coil portion and the goodness thereof are improved. The degree Q does not deviate from the normal value. As a result, an LC resonator whose resonance characteristics are not affected by the mounting state on a printed wiring board or the like can be obtained.
【００１０】なお、本発明に係るＬＣ共振子は、前記実
施例に限定するものではなく、その要旨の範囲内で種々
に変形することができる。コンデンサ部の容量電極は２
枚に限定されるものではなく、より大きな容量を必要と
する場合はさらに容量電極の枚数を増加させてもよい。
また、コイル部のコイルは渦巻き形状のコイル用導体か
らなる単層コイルに限定されるものではなく、磁性体層
とコイル用導体を交互に積層すると共に各コイル用導体
をスルーホール等を介して電気的にシリーズに接続した
積層コイルであってもよい。The LC resonator according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of its gist. The capacitance electrode of the capacitor part is 2
The number of capacitive electrodes is not limited to one, and the number of capacitive electrodes may be further increased when a larger capacitance is required.
Further, the coil of the coil portion is not limited to a single-layer coil composed of a spiral coil conductor, and magnetic layers and coil conductors are alternately laminated and each coil conductor is provided through a through hole or the like. It may be a laminated coil electrically connected in series.
【００１１】さらに、前記実施例のＬＣ共振子は等価電
気回路では並列共振回路を構成するものであるが、直列
共振回路を構成するものでもよい。Further, the LC resonator of the above embodiment forms a parallel resonance circuit in an equivalent electric circuit, but may form a series resonance circuit.
【００１２】[0012]
【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、コイル部とコンデンサ部を組み合わせて一体的
に積層し、かつ、コンデンサ部の容量電極がコイル部の
コイル用導体を印刷配線板等に配設されているグランド
電極や信号電極から遮蔽する構造にしたので、コイル用
導体に発生した磁界が印刷配線板等に漏れなくなり、コ
イル部のインダクタンスＬや良好度Ｑの正規の数値から
のずれがなくなった。この結果、共振特性が印刷配線板
等への実装状態に影響されず、かつ、実装作業が簡略さ
れたＬＣ共振子が得られた。As is apparent from the above description, according to the present invention, the coil portion and the capacitor portion are combined and integrally laminated, and the capacitor electrode of the capacitor portion prints the coil conductor of the coil portion. Since the structure is designed to shield from the ground electrode and signal electrode provided on the wiring board, the magnetic field generated in the coil conductor does not leak to the printed wiring board, etc. The deviation from the figure disappeared. As a result, an LC resonator was obtained in which the resonance characteristics were not affected by the mounting state on a printed wiring board or the like and the mounting work was simplified.
【図１】本発明に係るＬＣ共振子の一実施例を示す垂直
断面図。FIG. 1 is a vertical sectional view showing one embodiment of an LC resonator according to the present invention.
【図２】図１に示したＬＣ共振子の内部を示す平面図。FIG. 2 is a plan view showing the inside of the LC resonator shown in FIG.
【図３】図１に示したＬＣ共振子の等価電気回路図。FIG. 3 is an equivalent electric circuit diagram of the LC resonator shown in FIG.
１…誘電体基板 ２，３…容量電極 ８…コイル用導体 Ａ…実装面 1 ... Dielectric substrate 2, 3 ... Capacitance electrode 8 ... Coil conductor A ... Mounting surface
───────────────────────────────────────────────────── フロントページの続き (72)発明者 牧田 隆志 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 (56)参考文献 特開 昭59−145114（ＪＰ，Ａ) 特開 平３−159206（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Makita 2 26-10 Tenjin Tenjin, Nagaokakyo City, Kyoto Prefecture Murata Manufacturing Co., Ltd. (56) Reference JP-A-59-145114 (JP, A) JP HEI 3-159206 (JP, A)
Claims (1)
ル部とコンデンサ部を積み重ね、前記コイル部のコイル
用導体を設けた領域が前記コンデンサ部の容量電極の少
なくとも一つを設けた領域の範囲内に位置していること
を特徴とするＬＣ共振子。1. A capacitor portion is disposed on a mounting surface side, a coil portion and a capacitor portion are stacked, and an area where a coil conductor of the coil portion is provided is an area where at least one capacitance electrode of the capacitor portion is provided. LC resonator characterized by being located within a range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3160519A JP2669193B2 (en) | 1991-07-01 | 1991-07-01 | LC resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3160519A JP2669193B2 (en) | 1991-07-01 | 1991-07-01 | LC resonator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0514102A JPH0514102A (en) | 1993-01-22 |
| JP2669193B2 true JP2669193B2 (en) | 1997-10-27 |
Family
ID=15716715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3160519A Expired - Fee Related JP2669193B2 (en) | 1991-07-01 | 1991-07-01 | LC resonator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2669193B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6764658B2 (en) * | 2016-02-05 | 2020-10-07 | 株式会社村田製作所 | Electronic components |
| JP7347956B2 (en) * | 2019-04-25 | 2023-09-20 | 太陽誘電株式会社 | High frequency devices and multiplexers |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58145114A (en) * | 1982-01-25 | 1983-08-29 | ティーディーケイ株式会社 | Lc composite part |
-
1991
- 1991-07-01 JP JP3160519A patent/JP2669193B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0514102A (en) | 1993-01-22 |
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