JPH0626241U

JPH0626241U - Feedthrough multilayer capacitor

Info

Publication number: JPH0626241U
Application number: JP6209092U
Authority: JP
Inventors: 和幸堂下; 敏己金子
Original assignee: Murata Manufacturing Co Ltd
Current assignee: Murata Manufacturing Co Ltd
Priority date: 1992-09-03
Filing date: 1992-09-03
Publication date: 1994-04-08
Anticipated expiration: 2006-03-04
Also published as: JPH087622Y2

Abstract

(57)【要約】【目的】少ない研磨量で確実に内部電極層を露出させ
ることができる貫通型積層コンデンサを得る。【構成】貫通電極１１，１４とグランド電極１０，１
２，１３，１５が、コンデンサ１の積層方向の外側部の
位置にそれぞれ振り分けて配設されている。研磨を実施
すると、研磨量は少なくてもエッジ部は十分研磨され
る。従って、エッジ部に配置されている電極１０〜１５
の端部はコンデンサ１の端部に確実に露出されることに
なる。コンデンサ１の両端部及び中央部にはそれぞれ外
部電極２８，２９，３０が設けられている。貫通電極１
１，１４のそれぞれの一方の端部は外部電極２８に電気
的に接続し、他方の端部は外部電極２９に電気的に接続
している。同様に、グランド電極１０，１２，１３，１
５は外部電極３０に電気的に接続している。 (57) [Summary] [Objective] To obtain a feedthrough multilayer capacitor which can surely expose the internal electrode layers with a small polishing amount. [Structure] Through electrodes 11, 14 and ground electrodes 10, 1
2, 13, and 15 are arranged separately at positions on the outer side of the capacitor 1 in the stacking direction. When the polishing is performed, the edge portion is sufficiently polished even if the polishing amount is small. Therefore, the electrodes 10 to 15 arranged at the edges are
The end portion of is surely exposed to the end portion of the capacitor 1. External electrodes 28, 29, 30 are provided on both ends and the center of the capacitor 1, respectively. Through electrode 1
One end of each of 1 and 14 is electrically connected to the external electrode 28, and the other end thereof is electrically connected to the external electrode 29. Similarly, the ground electrodes 10, 12, 13, 1
5 is electrically connected to the external electrode 30.

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】[Industrial applications]

本考案は、種々の電子回路に組み込まれてノイズフィルタ等として利用される貫通型積層コンデンサに関する。 The present invention relates to a feedthrough multilayer capacitor incorporated in various electronic circuits and used as a noise filter or the like.

【０００２】[0002]

【従来の技術と課題】[Prior art and problems]

従来の貫通型積層コンデンサ１００は、図９に示すように、貫通電極層１０１，１０２及びグランド電極層１０３，１０４，１０５を積層方向の略中央部の位置に配設し、これら内部電極層１０１〜１０５と誘電体層１０８を交互に積み重ねた後に焼成して積層体とされる。積層体の表面には外部電極１１０，１１１，１１２が形成され、外部電極１１０は貫通電極層１０１，１０２の一方の端部に電気的に接続され、外部電極１１１は貫通電極層１０１，１０２の他方の端部に電気的に接続され、外部電極１１２はグランド電極１０３〜１０５に電気的に接続されている。 As shown in FIG. 9, a conventional feedthrough multilayer capacitor 100 has feedthrough electrode layers 101, 102 and ground electrode layers 103, 104, 105 arranged at substantially central positions in the stacking direction, and these internal electrode layers The layers 101 to 105 and the dielectric layer 108 are alternately stacked and then fired to form a laminated body. External electrodes 110, 111, 112 are formed on the surface of the laminated body, the external electrode 110 is electrically connected to one end of the through electrode layers 101, 102, and the external electrode 111 of the through electrode layers 101, 102 is formed. The external electrode 112 is electrically connected to the other end, and is electrically connected to the ground electrodes 103 to 105.

【０００３】ところで、貫通電極層１０１，１０２には直流電流が流れるため、コンデンサの構造としては貫通電極層１０１，１０２と外部電極１１０，１１１間の電気的接続信頼性が高く、かつ、直流抵抗のばらつきが小さいものが望まれている。従って、外部電極１１０〜１１２形成前に、前記積層体の端面部を、例えばバレル研磨によって内部電極層１０１〜１０５の端部が積層体の端面に確実に露出するようにしている。By the way, since a direct current flows through the through electrode layers 101 and 102, the structure of the capacitor is such that the electrical connection reliability between the through electrode layers 101 and 102 and the external electrodes 110 and 111 is high, and the DC resistance is high. It is desired that the variation of is small. Therefore, before forming the external electrodes 110 to 112, the end faces of the laminated body are surely exposed to the end faces of the laminated body by, for example, barrel polishing.

【０００４】しかし、研磨を過剰にすると内部電極層１０１〜１０５の露出については問題がなくなるが、積層体のエッジ部や端面が大きく削り取られ外形寸法精度が悪くなるという問題が発生する。逆に、研磨が不十分な場合は、エッジ部は削られるが、内部電極層が配設されている端面中央部はあまり削り取られないため、内部電極層１０１〜１０５の露出状態が悪くなるという問題が発生する。However, when the polishing is excessively performed, there is no problem in exposing the internal electrode layers 101 to 105, but there is a problem in that the edge portion and the end surface of the laminated body are largely shaved off and the external dimension accuracy is deteriorated. On the contrary, if the polishing is insufficient, the edge portions are scraped off, but the central portion of the end face where the internal electrode layers are disposed is not scraped off so much, so that the exposed state of the internal electrode layers 101 to 105 is deteriorated. The problem occurs.

【０００５】そこで、本考案の課題は少ない研磨量で確実に内部電極層を露出させることができる貫通型積層コンデンサを提供することにある。Therefore, an object of the present invention is to provide a feedthrough multilayer capacitor that can surely expose the internal electrode layers with a small amount of polishing.

【０００６】[0006]

【課題を解決するための手段と作用】[Means and actions for solving the problem]

以上の課題を解決するため、本考案に係る貫通型積層コンデンサは、貫通電極層と、グランド電極層と、前記各電極層と交互に積層された誘電体層を備え、前記貫通電極層と前記グランド電極層が、積層方向の外側部の位置に配設されていることを特徴とする。 In order to solve the above problems, a feedthrough multilayer capacitor according to the present invention includes a feedthrough electrode layer, a ground electrode layer, and a dielectric layer alternately laminated with each of the electrode layers. The ground electrode layer is arranged at a position on the outer side in the stacking direction.

【０００７】以上の構成において、貫通電極層及びグランド電極層が、コンデンサの外側部の位置に配設されているため、これら内部電極層の端部はコンデンサのエッジ部に位置することになる。そして、研磨量が少なくても、エッジ部は十分に研磨されるため、内部電極層の端部はエッジ部に確実に露出されることになる。In the above structure, since the penetrating electrode layer and the ground electrode layer are arranged at the position of the outside of the capacitor, the ends of these internal electrode layers are located at the edge of the capacitor. Even if the polishing amount is small, the edge portion is sufficiently polished, so that the end portion of the internal electrode layer is surely exposed to the edge portion.

【０００８】[0008]

【実施例】【Example】

以下、本考案に係る貫通型積層コンデンサの実施例について添付図面を参照して説明する。［第１実施例、図１〜図５］図１に示すように、貫通型積層コンデンサは、貫通電極１１，１４をそれぞれ表面に設けた誘電体シート５，８、グランド電極１０，１２、１３，１５をそれぞれ表面に設けた誘電体シート４，６，７，９、保護層としての誘電体シート２０，２１及び中間層としての誘電体シート２２から構成されている。各誘電体シート４〜９，２０〜２２は例えばセラミック材料からなる。積層状態では電極１０〜１２と電極１３〜１５は誘電体シート２２を間にして、積層方向の外側部の位置に配設されることになる。 Embodiments of the feedthrough multilayer capacitor according to the present invention will be described below with reference to the accompanying drawings. [First Embodiment, FIGS. 1 to 5] As shown in FIG. 1, a feedthrough multilayer capacitor has dielectric sheets 5 and 8 having feedthrough electrodes 11 and 14 provided on their surfaces, and ground electrodes 10, 12 and 13, respectively. , 15 are provided on the surface of each of the dielectric sheets 4, 6, 7 and 9, dielectric sheets 20 and 21 as a protective layer, and a dielectric sheet 22 as an intermediate layer. Each of the dielectric sheets 4 to 9 and 20 to 22 is made of, for example, a ceramic material. In the laminated state, the electrodes 10 to 12 and the electrodes 13 to 15 are arranged at positions on the outer side in the laminating direction with the dielectric sheet 22 in between.

【０００９】貫通電極１１，１４はそれぞれ誘電体シート５，８の左右の縁部にその端部が露出している。同様に、グランド電極１０，１２，１３，１５はそれぞれ誘電体シート４，６，７，９の手前側及び奥側の縁部にその端部が露出している。各誘電体シート４〜９，２０〜２２は、図１に示すように積み重ねられた後、焼成されて図２に示す積層体とされる。各誘電体シート４〜９，２０〜２１は一体化され焼結誘電体２５とされる。電極１０〜１２と電極１３〜１５はそれぞれ積層体の積層方向の外側部の位置に振り分けて配設されている。従って、電極１０〜１２と電極１３〜１５の端部はコンデンサ１のエッジ部近傍に配置されている。The through electrodes 11 and 14 have their ends exposed at the left and right edges of the dielectric sheets 5 and 8, respectively. Similarly, the ground electrodes 10, 12, 13, and 15 have their ends exposed at the front and rear edges of the dielectric sheets 4, 6, 7, and 9, respectively. The dielectric sheets 4 to 9 and 20 to 22 are stacked as shown in FIG. 1 and then fired to form a laminated body shown in FIG. The dielectric sheets 4 to 9 and 20 to 21 are integrated into a sintered dielectric 25. The electrodes 10 to 12 and the electrodes 13 to 15 are separately arranged at positions on the outer side in the stacking direction of the stacked body. Therefore, the ends of the electrodes 10 to 12 and the electrodes 13 to 15 are arranged near the edge of the capacitor 1.

【００１０】このコンデンサ１を例えばバレル研磨するとき、図３に示すように研磨の量は少なくても、エッジ部は十分研磨される。従って、エッジ部近傍に配置されている電極１０〜１５の端部はコンデンサ１の端部に確実に露出されることになる。さらに、コンデンサの両端部及び中央部にそれぞれ外部電極２８，２９，３０が設けられている。貫通電極１１，１４のそれぞれ一方の端部は外部電極２８に電気的に接続し、他方の端部は外部電極２９に電気的に接続している。When this capacitor 1 is barrel-polished, for example, as shown in FIG. 3, the edge portion is sufficiently polished even if the amount of polishing is small. Therefore, the ends of the electrodes 10 to 15 arranged near the edges are surely exposed to the ends of the capacitor 1. Further, external electrodes 28, 29, 30 are provided on both ends and the center of the capacitor, respectively. One end of each of the through electrodes 11 and 14 is electrically connected to the external electrode 28, and the other end thereof is electrically connected to the external electrode 29.

【００１１】図４はこうして得られたコンデンサの電気等価回路を示すものである。図５はこうして得られたコンデンサの貫通電極１１，１４の直流抵抗を測定し、その測定値に基づいて計算した結果をグラフにしたものである。Ｘ（Ａｖｅ）は平均値を表わし、σは標準偏差値を表わしている。比較のため、従来の構造を有するコンデンサの結果も併せて示している。グラフから従来のコンデンサより直流抵抗値が下がり、またばらつきも小さく、電気的接続信頼性が改善されていることが認められる。FIG. 4 shows an electrical equivalent circuit of the capacitor thus obtained. FIG. 5 is a graph showing the results of measuring the DC resistances of the through electrodes 11 and 14 of the capacitors thus obtained and calculating based on the measured values. X (Ave) represents an average value, and σ represents a standard deviation value. For comparison, the results of a capacitor having a conventional structure are also shown. From the graph, it can be seen that the DC resistance value is lower than that of the conventional capacitor, the variation is small, and the electrical connection reliability is improved.

【００１２】［第２実施例、図６及び図７］図６に示すように、貫通型積層コンデンサ３１は、貫通電極４３，４４，４７，４８をそれぞれ表面に設けた誘電体シート３５，３６，３９，４０、グランド電極４２，４５，４６，４９をそれぞれ表面に設けた誘電体シート３４，３７，３８，４１、保護層としての誘電体シート５０，５１及び中間層としての誘電体シート５２から構成されている。Second Embodiment, FIGS. 6 and 7 As shown in FIG. 6, the feedthrough multilayer capacitor 31 includes dielectric sheets 35 and 36 having feedthrough electrodes 43, 44, 47 and 48 provided on the surfaces thereof, respectively. , 39, 40, and dielectric sheets 34, 37, 38, 41 on the surfaces of which ground electrodes 42, 45, 46, 49 are provided, dielectric sheets 50, 51 as protective layers, and dielectric sheet 52 as an intermediate layer. It consists of

【００１３】各誘電体シート３４〜４１，５０〜５２は、図６に示すように積み重ねられた後、焼成されて図７に示す積層体とされる。各誘電体シート３４〜４１、５０〜５２は一体化され焼結誘電体５５とされる。電極４２〜４５と電極４６〜４９はそれぞれ積層体の積層方向の外側部の位置に振り分けて配設されている。従って、電極４２〜４９の端部はコンデンサ３１のエッジ部近傍に配設されている。The respective dielectric sheets 34 to 41 and 50 to 52 are stacked as shown in FIG. 6 and then fired to obtain a laminated body shown in FIG. The respective dielectric sheets 34 to 41 and 50 to 52 are integrated into a sintered dielectric 55. The electrodes 42 to 45 and the electrodes 46 to 49 are separately arranged at positions on the outer side in the stacking direction of the stacked body. Therefore, the ends of the electrodes 42 to 49 are arranged near the edge of the capacitor 31.

【００１４】このコンデンサ１が研磨されると、エッジ部は十分研磨されるので、電極４２〜４９の端部はコンデンサ端部に確実に露出されることになる。さらに、コンデンサ３１の両端部及び中央部にそれぞれ外部電極５８，５９，６０が設けられている。貫通電極４３，４４，４７，４８の一方の端部は外部電極５８に電気的に接続され、他方の端部は外部電極５９に電気的に接続されている。同様に、グランド電極４２，４５，４６，４９は外部電極６０に電気的に接続されている。When the capacitor 1 is polished, the edges are sufficiently polished, so that the ends of the electrodes 42 to 49 are surely exposed at the ends of the capacitors. Further, external electrodes 58, 59, 60 are provided on both ends and the center of the capacitor 31, respectively. One end of each of the through electrodes 43, 44, 47, 48 is electrically connected to the external electrode 58, and the other end thereof is electrically connected to the external electrode 59. Similarly, the ground electrodes 42, 45, 46, 49 are electrically connected to the external electrode 60.

【００１５】こうして得られたコンデンサ３１は、第１実施例のコンデンサと同様の作用、効果を奏すると共に、高周波特性がさらに向上したものとなる。［第３実施例、図８］図８に示すように第３実施例の貫通型積層コンデンサ７１は、第１実施例の貫通型積層コンデンサ１の貫通電極１４とグランド電極１３，１５を取り除いたものと同様の構造をしている。図８において、第１実施例と同一部品、同一部分には同じ符号を付している。このコンデンサは第１実施例のコンデンサと同様の作用、効果を奏する。The capacitor 31 thus obtained has the same action and effect as those of the capacitor of the first embodiment, and has further improved high frequency characteristics. [Third Embodiment, FIG. 8] As shown in FIG. 8, the feedthrough multilayer capacitor 71 of the third embodiment has the feedthrough electrode 14 and the ground electrodes 13 and 15 of the feedthrough multilayer capacitor 1 of the first embodiment removed. It has the same structure as that of Mt. In FIG. 8, the same parts and parts as those of the first embodiment are designated by the same reference numerals. This capacitor has the same operation and effect as the capacitor of the first embodiment.

【００１６】［他の実施例］本考案に係る貫通型積層コンデンサ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。特に、貫通電極層とグランド電極層の層数は仕様に合わせて任意の数が採用される。[Other Embodiments] The feedthrough multilayer capacitor 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 particular, the number of through electrode layers and the number of ground electrode layers may be arbitrary according to the specifications.

【００１７】[0017]

【考案の効果】[Effect of device]

以上の説明で明らかなように、本考案によれば、貫通電極層やグランド電極層が、コンデンサの積層方向の外側部の位置に配設されているので、研磨量が少なくても、エッジ部は十分に研磨され、これら内部電極層の端部はエッジ部に確実に露出されることになる。この結果、内部電極層と外部電極の電気的接続性が良くなり、直流抵抗値が低く、かつ、ばらつきの少ない貫通型積層コンデンサが得られる。 As is clear from the above description, according to the present invention, since the through electrode layer and the ground electrode layer are arranged at the position on the outer side in the stacking direction of the capacitor, even if the polishing amount is small The portions are sufficiently polished so that the end portions of these internal electrode layers are surely exposed at the edge portions. As a result, the electrical connection between the internal electrode layer and the external electrode is improved, a direct current resistance value is low, and a feedthrough multilayer capacitor with little variation can be obtained.

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

【図１】本考案に係る貫通型積層コンデンサの第１実施
例を示す分解斜視図。FIG. 1 is an exploded perspective view showing a first embodiment of a feedthrough multilayer capacitor according to the present invention.

【図２】図１に示した貫通型積層コンデンサの積層状態
を示す断面図。FIG. 2 is a sectional view showing a laminated state of the feedthrough multilayer capacitor shown in FIG.

【図３】図１に示した貫通型積層コンデンサの完成品を
示す断面図。3 is a sectional view showing a completed product of the feedthrough multilayer capacitor shown in FIG.

【図４】図３に示した貫通型積層コンデンサの電気等価
回路図。FIG. 4 is an electrical equivalent circuit diagram of the feedthrough multilayer capacitor shown in FIG.

【図５】図３に示した貫通型積層コンデンサの貫通電極
の直流抵抗のばらつきを測定した結果を示すグラフ。5 is a graph showing the results of measuring variations in DC resistance of through electrodes of the through multilayer capacitor shown in FIG.

【図６】本考案に係る貫通型積層コンデンサの第２実施
例を示す分解斜視図。FIG. 6 is an exploded perspective view showing a second embodiment of a feedthrough multilayer capacitor according to the present invention.

【図７】図６に示した貫通型積層コンデンサの完成品を
示す断面図。7 is a sectional view showing a completed product of the feedthrough multilayer capacitor shown in FIG.

【図８】本考案に係る貫通型積層コンデンサの第３実施
例を示す断面図。FIG. 8 is a sectional view showing a third embodiment of a feedthrough multilayer capacitor according to the present invention.

【図９】従来例を示す断面図。FIG. 9 is a sectional view showing a conventional example.

【符号の説明】[Explanation of symbols]

１…貫通型積層コンデンサ４〜９…誘電体シート１０，１２，１３，１５…グランド電極層１１，１４…貫通電極層２０，２１，２２…誘電体シート３１…貫通型積層コンデンサ３４〜４１…誘電体シート４２，４５，４６，４９…グランド電極４３，４４，４７，４８…貫通電極５０，５１，５２…誘電体シート７１…貫通型積層コンデンサ DESCRIPTION OF SYMBOLS 1 ... Through-type multilayer capacitor 4-9 ... Dielectric sheet 10, 12, 13, 15 ... Ground electrode layer 11, 14 ... Through-electrode layer 20, 21, 22 ... Dielectric sheet 31 ... Through-type multilayer capacitor 34-41 ... Dielectric sheet 42, 45, 46, 49 ... Ground electrode 43, 44, 47, 48 ... Through electrode 50, 51, 52 ... Dielectric sheet 71 ... Through type multilayer capacitor

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

【請求項１】貫通電極層と、グランド電極層と、前記
各電極層と交互に積層された誘電体層を備え、前記貫通電極層と前記グランド電極層が、積層方向の外
側部の位置に配設されていること、を特徴とする貫通型積層コンデンサ。1. A through electrode layer, a ground electrode layer, and a dielectric layer that is alternately laminated with each of the electrode layers, wherein the through electrode layer and the ground electrode layer are provided at positions on the outer side in the laminating direction. A feedthrough multilayer capacitor, which is characterized in that it is provided.