JPH04139809A - Laminated capacitor - Google Patents
Laminated capacitorInfo
- Publication number
- JPH04139809A JPH04139809A JP26405190A JP26405190A JPH04139809A JP H04139809 A JPH04139809 A JP H04139809A JP 26405190 A JP26405190 A JP 26405190A JP 26405190 A JP26405190 A JP 26405190A JP H04139809 A JPH04139809 A JP H04139809A
- Authority
- JP
- Japan
- Prior art keywords
- vapor
- zinc
- film
- deposited
- face electrode
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 39
- 239000010408 film Substances 0.000 claims abstract description 30
- 239000011701 zinc Substances 0.000 claims abstract description 20
- 239000011104 metalized film Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- 229910001297 Zn alloy Inorganic materials 0.000 claims abstract description 8
- 230000001133 acceleration Effects 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 1
- 230000008859 change Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は積層コンデンサに関し、特に電気機器用コンデ
ンサの中でも、改良した金属化フィルムを使用した金属
化フィルムを用いた積層コンデンサに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to multilayer capacitors, and more particularly to multilayer capacitors using metallized films using improved metallized films, particularly among capacitors for electrical equipment.
従来の技術
従来電気機器用コンデンサは、金属化フィルムや誘電体
フィルムを巻回して作られる巻回コンデンサが主流であ
ったが、生産性や製品の安全性から、大きな母体コンデ
ンサを切断して得られる積層コンデンサも、最近多く生
産されるようになってきた。従来この種の積層コンデン
サは、特開昭５６−１０１７３８号公報に示されるよう
な構成が一般的てあった。以下その構成について、第２
図を参照しながら説明ずろ。Conventional technology Traditionally, the mainstream of capacitors for electrical equipment was wound capacitors made by winding metallized films or dielectric films, but for reasons of productivity and product safety, it has become possible to cut the large base capacitors to obtain the desired results. Recently, many multilayer capacitors have been produced. Conventionally, this type of multilayer capacitor has generally had a configuration as shown in Japanese Patent Laid-Open No. 101738/1983. The structure is explained below in the second section.
Please explain with reference to the diagram.
アルミニウム蒸着された金属化フィルム１１を誘電体フ
ィルム１２を交互に巻回した端面に電極引出し用メタリ
コン１３を施し、熱処理等の工程を経て母体コンデンサ
１６が作られる。その後所望の静電容量に例えばＡとＢ
の個所で母体コンデンサ１６を切断して積層コンデンサ
１７が得られる。A metallicon 13 for electrode extraction is applied to the end face of a metallized film 11 on which aluminum is vapor-deposited and a dielectric film 12 is alternately wound thereon, and a base capacitor 16 is fabricated through processes such as heat treatment. Then set the desired capacitance, e.g. A and B.
By cutting the base capacitor 16 at the point , a multilayer capacitor 17 is obtained.
発明が解決しようとする課題
しかしながら上記従来の積層コンデンサ１７の構成では
、巻回量コンデンサに比較して切断面１８を持つために
、切断面１８におけろ耐電圧特性や電圧加速寿命試験（
以下、寿命試験と呼ぶ）での静電容量の変化率が大きく
なる傾向を示した。Problems to be Solved by the Invention However, in the configuration of the conventional multilayer capacitor 17 described above, since it has a cut surface 18 compared to a winding capacitor, the withstand voltage characteristics and voltage accelerated life test (
The rate of change in capacitance during the life test (hereinafter referred to as a life test) tended to increase.
切断面１８における耐電圧特性は、金属化フィルム］１
や誘電体フィルム１２（以下フィルムと略称する）に用
いられるフィルムの厚さや蒸着される金属の膜厚または
切断面１８の状態に依存し、その改良方法として、特開
昭５６−１０１７４０号公報記載の方法などが提案され
ている。また寿命試験における静電容量変化率増大の防
止には、フィルムの厚さや金属化フィルム１１に蒸着す
る金属の膜厚を制御することによって大きな効果か得ら
れる。しかしながら、耐電圧特性を改良ずれば、寿命試
験時の静電容量の変化率が大きくなったり、フィルムの
厚さを厚くずれば、コンデンサ体積か大きくなるなど、
その改良方法には限界があった。一方金属化フイルムを
用いた積層コンデン“リ−の特性は、蒸着金属の種類に
も大きく影響を受け、一般的に使用されているのに、ア
ルミニウム（ＡＣ）と亜鉛（Ｚｎ）がある。、ｌ蒸着法
七Ｚ ｎ蒸着法ては、特に寿命時の容量変化率特性の点
において異なる挙動を示す。すなわちｌ蒸着法によるコ
ンデンサは、ＡＱが酸化してＡｅ ２０３の絶縁物とな
り、電極面積が減少し、静電容量の変化率が大きくなる
のに比較し、Ｚｎ蒸着法によるコンデンサでは、Ｚ ｎ
か酸化してもＺ ｎ Ｏとなり、半導体または一部が導
体のま」であるために、静電容量の変化率は小さ（てす
む。反面、ニー１ンデンサ内の部分放電等によりフィル
ムか劣化し絶縁抵抗の低下を招きやづい傾向かあ−）た
。特に、切断面１８を持つ金属１ヒフイ几ｊ、を用いた
積層コンデンサでは、自己回復１テ１−の悪いＺ ｎ蒸
着法は使用できない課題があった。本発明は」二足課題
を解決するものであり、耐電圧特１１．と、電圧加速寿
命特性に優れた積層コンうンリを提供することを目的と
する。The voltage resistance characteristics at the cut surface 18 are as follows: metallized film]1
It depends on the thickness of the film used for the dielectric film 12 (hereinafter abbreviated as film), the thickness of the metal to be vapor-deposited, or the state of the cut surface 18, and methods for improving it are described in JP-A-56-101740. methods have been proposed. Further, in order to prevent an increase in the capacitance change rate in the life test, a great effect can be obtained by controlling the thickness of the film and the thickness of the metal deposited on the metallized film 11. However, if the withstand voltage characteristics are improved, the rate of change in capacitance during the life test will increase, and if the film thickness is increased, the capacitor volume will increase.
There were limits to this improvement method. On the other hand, the characteristics of laminated capacitors using metallized films are greatly influenced by the type of metal deposited, with aluminum (AC) and zinc (Zn) being commonly used. The L evaporation method and the Zn evaporation method exhibit different behavior, especially in terms of the capacitance change rate characteristics during life.In other words, in the capacitor manufactured by the L evaporation method, AQ oxidizes to become an insulator of Ae 203, and the electrode area decreases. However, in capacitors made by Zn vapor deposition, Zn
Even if it is oxidized, it becomes ZnO, and since it remains a semiconductor or a partially conductor, the rate of change in capacitance is small.On the other hand, the film may deteriorate due to partial discharge within the knee capacitor This tends to lead to a decrease in insulation resistance. In particular, in a multilayer capacitor using a metal layer having a cut surface 18, there is a problem that the Zn vapor deposition method, which has poor self-healing properties, cannot be used. The present invention is intended to solve two problems: 11. withstand voltage characteristics; The purpose of the present invention is to provide a laminated concrete with excellent voltage-accelerated life characteristics.
課題を解決するだめの手段
上記目的を達成するために、本発明の積層コンデンサは
金属化フィルムの蒸着金属を、一方の面の電極にアルミ
ニウムの１料を使用し、他方の面の電極に限定された蒸
着膜厚の亜鉛または亜鉛合金を使用したものである。Means for Solving the Problems In order to achieve the above object, the multilayer capacitor of the present invention uses a vapor-deposited metal of the metallized film for the electrodes on one side and is limited to the electrodes on the other side. This method uses zinc or zinc alloy with a vapor-deposited film thickness.
作用
この構成により本発明の積層コンデンサは、切断面での
耐電圧特性は、金属化フィルムの一方の面の電極の蒸着
金属を自己回復作用の特性がよいアルミニウムにし、他
方の面の電極の蒸着金属を亜鉛または亜鉛合金としその
蒸着膜厚を薄く（蒸着膜抵抗６〜３０Ω／ロ相当）する
ことにより、切断面での電気的自己回復作用が有効に働
くととらに、切断面での耐電圧特性に影響されず誘電体
フィルム自身の耐電圧特性に近づくこととなる。With this structure, the multilayer capacitor of the present invention has a high withstand voltage characteristic at the cut surface.The vapor-deposited metal of the electrode on one side of the metallized film is made of aluminum, which has good self-healing properties, and the vapor-deposited metal of the electrode on the other side is made of aluminum. By using zinc or zinc alloy as the metal and reducing the thickness of the deposited film (equivalent to a deposited film resistance of 6 to 30 Ω/Ω), the electrical self-healing effect on the cut surface works effectively, and the resistance on the cut surface is improved. It is not affected by the voltage characteristics and approaches the withstand voltage characteristics of the dielectric film itself.
さらに、電圧加速寿命試験での容量減少は、亜鉛蒸着を
使用することにより、蒸着膜後退のエロージジンを防止
することとなる。Furthermore, by using zinc evaporation, the reduction in capacity in the voltage accelerated life test prevents erosion caused by the regression of the evaporated film.
実施例
以下、本発明の一実施例の積層コンデンサについて第１
図を参照しながら説明する。第１図は本発明の一実施例
の積層コンデンサを示ずものてあり、ベース誘電体フィ
ルム（例えばポリエチレンテレフタレート厚さ５μｍ）
３の一方の面の電極にアルミニウム電極１を、他方の面
の電極に亜鉛電極２を蒸着した両面金属化フィルムと誘
電体フィルム（例えばポリプロピレン厚さ５μｍ）４ど
を重ねて巻回し、その両側面に亜鉛金属メタリコンを用
いて外部電極６を形成何る。次にこのように作製した母
体コンデンサを切断面５て切断して、エポキシ樹脂で外
装を施し７、積層コンデンサか得られる。この時、アル
ミニウムの蒸着膜抵抗値は、一般的に使用される範囲３
．５Ω／□とし、亜鉛の薄着膜抵抗値は３〜５０Ω２′
口の範囲でふらせて、特性の最もよい範囲を求めた。Example Below, the first example of a multilayer capacitor according to an example of the present invention will be described.
This will be explained with reference to the figures. FIG. 1 does not show a multilayer capacitor according to an embodiment of the present invention, in which a base dielectric film (for example, polyethylene terephthalate with a thickness of 5 μm) is shown.
A double-sided metallized film in which an aluminum electrode 1 is deposited on one side of 3 and a zinc electrode 2 is deposited on the other side, and a dielectric film (for example, polypropylene with a thickness of 5 μm) 4 are layered and wound. An external electrode 6 is formed on the surface using zinc metal. Next, the base capacitor thus produced is cut along the cut surface 5 and covered with epoxy resin 7 to obtain a multilayer capacitor. At this time, the resistance value of the aluminum vapor deposited film is within the commonly used range 3.
．． 5Ω/□, and the resistance value of the thin zinc film is 3 to 50Ω2'
The best range of characteristics was determined by varying the range in the mouth.
比較した結果を下記に示す。従来品は第２図で示す金属
化フィルムを用いた積層」ンデンザであり、特性評価は
、金属化フィルムを用いた積層コンデンサの課題である
切断面の５，１８の電圧破壊値水準と電圧加速寿命５１
（験での静電容量の変化率で求めた。切断面５．ＩＳの
電圧破壊は、１０ＶＡＣ／ｓｅｃの昇圧スピーＩ・て、
切断面５，１８ての破壊電圧を求めた。電圧加速寿命試
験での静電容量変化率は、周囲温度７０℃て２５０ＶＡ
Ｃを８００ｈｒ印加後の値を求めた。The results of the comparison are shown below. The conventional product is a multilayer capacitor using a metallized film as shown in Figure 2, and its characteristics were evaluated based on voltage breakdown value levels of 5 and 18 on the cut surface and voltage acceleration, which are issues for multilayer capacitors using metallized films. Lifespan 51
(It was determined from the rate of change in capacitance in the experiment. The voltage breakdown of the cut surface 5.IS is at a boost speed of 10 VAC/sec I,
The breakdown voltages at cut surfaces 5 and 18 were determined. The capacitance change rate in the voltage accelerated life test was 250 VA at an ambient temperature of 70°C.
The value after applying C for 800 hours was determined.
」−記に示すように、比較品の画電極とも、亜鉛蒸清の
金属化フィルムを使用ずれば、アルミニウムだけの金属
化フィルムを使用した従来の積層コンデンーリ−に比較
し、切断面での切断面電圧破壊値は低下するが、電圧加
速寿命試験での静電容量変化率は少なくなる。しかしな
がら、本実施例品のように一方の面の電極にアルミニウ
ムの蒸着金属を使用し、他方の面の電極に亜鉛の蒸着金
属を使用し、さらに亜鉛蒸着の抵抗値を６〜３０Ω／□
に制御ずれは、従来具」−のよいコンデンザ特１１−が
得られる。しかしなから、亜鉛蒸着の蒸着膜抵抗値か６
Ω７″−未満である６と、切断面の電圧破壊値は、亜鉛
蒸着の影響を受け、低い水準しかｊすられない。又３０
Ω／□より高いと、蒸着膜か薄くなり過ぎ、水分の影響
や、部分放電による蒸着膜の飛散が大きくなり、静電容
量変（ヒ率か太き（なる傾向がある。すなわち蒸着膜抵
抗値が６〜３０Ω、・′口てあれば、切断面耐圧の高い
、しかも寿命性１１ニのよい積層コンデンリを提（ｊｔ
でざる。As shown in the figure below, if a zinc-distilled metallized film is used for the comparison picture electrode, it will be easier to cut at the cutting surface than a conventional laminated condenser that uses only an aluminum metallized film. Although the surface voltage breakdown value decreases, the capacitance change rate in the voltage accelerated life test decreases. However, as in the product of this example, aluminum vapor-deposited metal is used for the electrode on one side, zinc vapor-deposited metal is used for the electrode on the other side, and the resistance value of the zinc vapor-deposited metal is increased from 6 to 30Ω/□.
As for the control deviation, a condenser characteristic 11 with better control than that of the conventional device can be obtained. However, the resistance value of the zinc evaporated film is 6.
6, which is less than Ω7″-, the voltage breakdown value at the cut surface is affected by the zinc evaporation and is only at a low level.
If it is higher than Ω/□, the deposited film becomes too thin, the influence of moisture and the scattering of the deposited film due to partial discharge increases, and the capacitance tends to change (the resistance of the deposited film increases). If the value is between 6 and 30Ω, we recommend a laminated condenser with high cutting surface pressure resistance and a long life of 11.
No way.
なお、亜鉛蒸着のフィルムを用いたのと同等の効果は、
亜鉛合金蒸着のフィル１、を用いた時でも得られるこ七
は言うまでもない。The same effect as using a zinc-deposited film is as follows.
Needless to say, the same result can be obtained even when using the zinc alloy deposited film 1.
発明の効果
以上の実施例の説明から明らかなように、本発明の積層
コンデンサによれば、積層コンデンサの利点である生産
性、安全性を確保しながら、不利な点てあった切断面の
耐電圧特性を向上さぜ、さらに、寿命特性をも改良した
高品質の金属化フィルムを用いた積層コンデンサを提供
できる。Effects of the Invention As is clear from the above description of the embodiments, the multilayer capacitor of the present invention has the advantages of productivity and safety of multilayer capacitors, while achieving the disadvantages of cutting surface resistance. It is possible to provide a multilayer capacitor using a high quality metallized film that has improved voltage characteristics and also has improved life characteristics.
第１図は本発明の一実施例の積層コンデンサの構造を示
す断面図、第２図は従来の積層コンデンサの（ａ）は母
体コンデンサの外観を示す斜視図、（ｂ）は切断後の積
層コンデンサの一部断面を示す斜視図である。
１・・・・・・アルミニウム電極、２・・・・・・亜鉛
電極、３・・・・・・ベース誘電体フィルム、４・・・
・・・誘電体フィルム、５・・・・・・切断面。
代理人の氏名 弁理士小鍜治明 ばか２名第
図
／／７ ）
Ｃｔ、ｔ−ノ
（ｂ）
；１Fig. 1 is a cross-sectional view showing the structure of a multilayer capacitor according to an embodiment of the present invention, Fig. 2 is a perspective view of a conventional multilayer capacitor, (a) is a perspective view showing the external appearance of the base capacitor, and (b) is a multilayer capacitor after cutting. FIG. 2 is a perspective view showing a partial cross section of a capacitor. 1... Aluminum electrode, 2... Zinc electrode, 3... Base dielectric film, 4...
...Dielectric film, 5...Cut surface. Name of agent: Patent attorney Haruaki Kodaka Two idiots Fig.//7) Ct, t-no (b); 1
Claims (1)
た積層コンデンサの前記金属化フイルムの一方の面の電
極の蒸着金属をアルミニウムとし、他方の面の電極の蒸
着金属を亜鉛又は亜鉛合金とし、前記亜鉛又は亜鉛合金
の蒸着膜抵抗値を６〜３０Ω／□とした積層コンデンサ
。In a laminated capacitor using a metallized film having a cut surface of a laminated film, the vapor-deposited metal of the electrode on one side of the metallized film is aluminum, the vapor-deposited metal of the electrode on the other side is zinc or a zinc alloy, and A multilayer capacitor with a vapor deposited film resistance value of 6 to 30Ω/□ of zinc or zinc alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26405190A JPH04139809A (en) | 1990-10-01 | 1990-10-01 | Laminated capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26405190A JPH04139809A (en) | 1990-10-01 | 1990-10-01 | Laminated capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04139809A true JPH04139809A (en) | 1992-05-13 |
Family
ID=17397863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26405190A Pending JPH04139809A (en) | 1990-10-01 | 1990-10-01 | Laminated capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04139809A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012190969A (en) * | 2011-03-10 | 2012-10-04 | Panasonic Corp | Metalized film capacitor |
-
1990
- 1990-10-01 JP JP26405190A patent/JPH04139809A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012190969A (en) * | 2011-03-10 | 2012-10-04 | Panasonic Corp | Metalized film capacitor |
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