JPS6314456Y2 - - Google Patents
Info
- Publication number
- JPS6314456Y2 JPS6314456Y2 JP11400382U JP11400382U JPS6314456Y2 JP S6314456 Y2 JPS6314456 Y2 JP S6314456Y2 JP 11400382 U JP11400382 U JP 11400382U JP 11400382 U JP11400382 U JP 11400382U JP S6314456 Y2 JPS6314456 Y2 JP S6314456Y2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- internal electrode
- portions
- short width
- internal
- 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
Links
- 239000003990 capacitor Substances 0.000 claims description 7
- 239000003985 ceramic capacitor Substances 0.000 description 8
- 230000005684 electric field Effects 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910001252 Pd alloy Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Ceramic Capacitors (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【考案の詳細な説明】
本考案は積層コンデンサに関し、特に積層セラ
ミツクコンデンサの内部電極構造に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multilayer capacitor, and particularly to an internal electrode structure of a multilayer ceramic capacitor.
従来から最も一般的な積層セラミツクコンデン
サは絶縁体シートに被着形成される内部電極のパ
ターンは対向外部電極に面する部分、すなわち内
部電極の先端側の両角部は直角の形状になつてい
た。 Conventionally, in the most common multilayer ceramic capacitor, the pattern of the internal electrode formed on the insulating sheet is such that the portion facing the opposing external electrode, that is, both corner portions on the tip side of the internal electrode, are in the shape of right angles.
かかる従来の内部電極の構造を有する積層セラ
ミツクコンデンサは寿命試験の段階において、外
部電極近傍の故障が比較的多いと言う問題があつ
た。 A multilayer ceramic capacitor having such a conventional internal electrode structure had a problem in that failures near the external electrodes were relatively common during the life test stage.
本考案者はこれらの故障を詳細に分析した結
果、絶縁体シートの欠陥に起因する故障の他に内
部電極の対向電極側の先端部分の形状に原因が有
り電圧を印加した時に、内部電極の先端の両角部
に電界が集中することと、製造工程中に発生する
内部電極の位置ずれ、すなわち積層ずれによつて
対向側の側面に付着している外部電極との距離が
接近し、更に強い電界が集中することが故障の原
因となつていることを見出した。 As a result of detailed analysis of these failures, the present inventor found that in addition to failures caused by defects in the insulator sheet, the cause was also due to the shape of the tip of the internal electrode on the opposing electrode side. The electric field is concentrated on both corners of the tip, and the distance between the external electrode attached to the opposite side is brought closer due to positional misalignment of the internal electrode that occurs during the manufacturing process, that is, lamination misalignment, and the electric field becomes even stronger. It was discovered that the concentration of the electric field was the cause of the failure.
本考案の目的はかかる従来技術における問題点
を解決し信頼性寿命を改造した積層セラミツクコ
ンデンサを提供することにある。 The purpose of the present invention is to provide a multilayer ceramic capacitor which solves the problems in the prior art and improves its reliability life.
本考案によれば、導電性の内部電極を被着形成
した絶縁シートを交互に積層し一体化する積層コ
ンデンサにおいて内部電極の先端側の電極幅に短
幅部を設け、かつ短幅部と段差部の角部を円弧状
に設けたことを特徴とする積層コンデンサが得ら
れる。 According to the present invention, in a multilayer capacitor in which insulating sheets on which conductive internal electrodes are adhered are alternately laminated and integrated, a short width part is provided in the electrode width on the tip side of the internal electrode, and there is a difference in level from the short width part. A multilayer capacitor characterized in that the corner portions of the portions are provided in an arc shape is obtained.
以下、本考案を図面を参照して説明する。 Hereinafter, the present invention will be explained with reference to the drawings.
第１図は本考案による一実施例の積層セラミツ
クコンデンサ平面の断面図である。セラミツクグ
リーンシートなどの誘電体シート１上にパラジウ
ム、白金、銀等の単一または合金からなる内部電
極２，３の先端側の幅を幾分短くした短幅部２
ａ，３ａを設け、かつ短幅部を設けることによつ
て形成された内部電極２，３の段差部２ｂ，３ｂ
の角と短幅部の左右の角２ｃ，３ｃに小円弧部分
を設けたパターンを被着形成する。 FIG. 1 is a cross-sectional plan view of a multilayer ceramic capacitor according to an embodiment of the present invention. On a dielectric sheet 1 such as a ceramic green sheet, internal electrodes 2 and 3 made of a single material or an alloy of palladium, platinum, silver, etc. are shortened in width on the tip side.
Step portions 2b, 3b of internal electrodes 2, 3 formed by providing electrodes a, 3a and short width portions
A pattern is formed in which small circular arc portions are provided at the corners of , and the left and right corners 2c and 3c of the short width portion.
次にこの内部電極２，３の向きを180゜変えた誘
電体シート１を交互に必要枚数を積層し、上下両
面に内部電極のない保護シート（図示省略）を適
当数重ねて、加圧一体化し、内部電極２，３が側
面まである端面を中心に隣接する両側面の１部ま
で、それぞれ銀ペーストなどの導電性塗料を塗布
して断面を略コの字状に外部電極４，５を被着形
成して本考案の積層セラミツクコンデンサを完成
する。 Next, the necessary number of dielectric sheets 1 with the internal electrodes 2 and 3 turned 180 degrees are stacked alternately, and an appropriate number of protective sheets (not shown) without internal electrodes are stacked on both the top and bottom surfaces, and the sheets are pressed together. The external electrodes 4, 5 are formed so that the cross section is approximately U-shaped by applying conductive paint such as silver paste to a part of both adjacent side surfaces centering on the end surface where the internal electrodes 2, 3 extend to the side surface. The laminated ceramic capacitor of the present invention is completed by deposition.
本考案の内部電極２，３の短幅部と段差部のそ
れぞれの隅となる個所を円弧状のパターン形状と
することにより、これらの個所への電界集中を緩
和させる。また内部電極２，３の位置がずれた場
合にも外部電極４，５の突出している部分４ａ，
５ａとの距離も従来積層コンデンサより離れてい
るため電界集中による故障が少くなる。 By forming the corner portions of the short width portions and stepped portions of the internal electrodes 2 and 3 of the present invention into arcuate pattern shapes, concentration of electric field at these portions is alleviated. Furthermore, even if the positions of the internal electrodes 2, 3 are shifted, the protruding portions 4a of the external electrodes 4, 5,
Since the distance to 5a is also greater than that of conventional multilayer capacitors, failures due to electric field concentration are reduced.
以上、本考案により積層コンデンサとくに高信
頼度用積層セラミツクコンデンサのエージング工
程における故障率を従来の約1/3に減少させるこ
とができた。 As described above, the present invention has made it possible to reduce the failure rate in the aging process of multilayer capacitors, especially high-reliability multilayer ceramic capacitors, to about one third of that of the conventional method.
第１図は本考案による一実施例の積層セラミツ
クコンデンサ平面の断面図。
１……誘電体シート、２，３……内部電極、２
ａ，３ａ……（内部電極の）短幅部、２ｂ，３ｂ
……（内部電極の）段差部、２ｃ，３ｃ……（内
部電極の）短幅部の角、４，５……外部電極、４
ａ，５ａ……外部電極の突出部分。
FIG. 1 is a cross-sectional plan view of a multilayer ceramic capacitor according to an embodiment of the present invention. 1... Dielectric sheet, 2, 3... Internal electrode, 2
a, 3a...Short width part (of internal electrode), 2b, 3b
...Step part (of internal electrode), 2c, 3c...Corner of short width part (of internal electrode), 4, 5...External electrode, 4
a, 5a...Protruding portions of external electrodes.
Claims (1)
に積層し一体化した積層コンデンサにおいて、前
記内部電極の先端側の電極幅に短幅部を設け、か
つ、短幅部と段差部の角部をそれぞれ円弧状に設
けたことを特徴とする積層コンデンサ。 In a multilayer capacitor in which insulating sheets on which conductive internal electrodes are formed are alternately laminated and integrated, a short width portion is provided in the electrode width on the tip side of the internal electrode, and a corner portion between the short width portion and the stepped portion is formed. A multilayer capacitor characterized by each layer being arranged in an arc shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11400382U JPS5918422U (en) | 1982-07-27 | 1982-07-27 | multilayer capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11400382U JPS5918422U (en) | 1982-07-27 | 1982-07-27 | multilayer capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5918422U JPS5918422U (en) | 1984-02-04 |
| JPS6314456Y2 true JPS6314456Y2 (en) | 1988-04-22 |
Family
ID=30263695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11400382U Granted JPS5918422U (en) | 1982-07-27 | 1982-07-27 | multilayer capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5918422U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4650475B2 (en) * | 2007-10-18 | 2011-03-16 | 株式会社村田製作所 | Multilayer ceramic capacitor array |
| US8885319B2 (en) * | 2009-07-01 | 2014-11-11 | Kemet Electronics Corporation | High capacitance multilayer with high voltage capability |
-
1982
- 1982-07-27 JP JP11400382U patent/JPS5918422U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5918422U (en) | 1984-02-04 |
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