JP2932768B2 - Chip varistor with resistor - Google Patents
Chip varistor with resistorInfo
- Publication number
- JP2932768B2 JP2932768B2 JP3183828A JP18382891A JP2932768B2 JP 2932768 B2 JP2932768 B2 JP 2932768B2 JP 3183828 A JP3183828 A JP 3183828A JP 18382891 A JP18382891 A JP 18382891A JP 2932768 B2 JP2932768 B2 JP 2932768B2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- sintered body
- varistor
- layer
- internal 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.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電圧非直線抵抗体とし
て機能するチップバリスタに関し、特に静電気サージ等
の高電圧パルスによる半導体部品の破壊，誤動作を確実
に防止できるとともに、部品点数を削減して実装コスト
を低減でき、かつ電子機器の小型化に貢献できるように
した構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip varistor functioning as a voltage non-linear resistor, and more particularly to a chip varistor capable of reliably preventing the destruction and malfunction of semiconductor components due to a high voltage pulse such as an electrostatic surge and reducing the number of components. The present invention relates to a structure that can reduce mounting cost and contribute to miniaturization of electronic equipment.
【０００２】[0002]
【従来の技術】近年、ＩＣ，ＬＳＩをはじめとする半導
体部品では、高速処理，高速駆動，低電圧化が急速に進
んでおり、これにともなって静電気サージ等の高電圧パ
ルスの侵入による半導体部品の破壊，誤動作が生じるお
それがある。そのために電源部，信号ラインの入，出力
部にノイズフィルタを接続して上記高電圧パルスを吸収
するようにしている。このような信号ライン用のノイズ
フィルタとして、従来、数ｐＦ〜数100 ｐＦのコンデン
サやインダクタが用いられている。しかし、このコンデ
ンサを用いても静電気のような高電圧パルスを吸収する
ことは困難であり、半導体部品の誤動作等を確実に防止
することができない。これはインダクタを用いた場合も
同様のことがいえる。このようなコンデンサに代わるも
のとして、従来、電圧非直線抵抗特性を有するＺｎＯ系
バリスタが採用されている。このバリスタは低電圧，低
容量であることから、上記高電圧パルスを吸収するノイ
ズフィルタとして適している。ところが、上記従来のバ
リスタを単独でノイズフィルタとして用いた場合、該バ
リスタに数10Ｋｖの静電気サージが侵入すると約100Aの
電流が瞬間的に流れることから、半導体部品を保護する
には、例えば上記バリスタのＶ100Aを半導体部品の破壊
電圧以下に設定しなければならない。一方、上記バリス
タのＶ1mA は定格電圧の数倍程度確保する必要があるこ
とから、この両方を満足するには非常に大きな非直線係
数が要求される。しかし、この非直線係数の向上には限
界があることから、上記従来のバリスタ単独では高電圧
パルスから半導体部品を保護しきれない場合がある。従
って、従来、図４に示すように、バリスタＺの信号ライ
ン２０に抵抗体２１を直列接続し、該抵抗体２１により
半導体部品２２を高電圧パルスから保護するようにして
いる。このようによればバリスタの非直線係数が従来程
度でも静電気サージの吸収が可能となる。2. Description of the Related Art In recent years, in semiconductor parts such as ICs and LSIs, high-speed processing, high-speed driving, and low voltage have been rapidly progressing. May be destroyed or malfunction. For this purpose, a noise filter is connected to the power supply section and the input and output sections of the signal line to absorb the high voltage pulse. As a noise filter for such a signal line, a capacitor or an inductor having several pF to several hundred pF has been conventionally used. However, even if this capacitor is used, it is difficult to absorb a high-voltage pulse such as static electricity, and it is not possible to reliably prevent a malfunction or the like of a semiconductor component. The same can be said for the case where an inductor is used. As a substitute for such a capacitor, a ZnO-based varistor having a voltage non-linear resistance characteristic has been conventionally used. Since this varistor has low voltage and low capacity, it is suitable as a noise filter for absorbing the high voltage pulse. However, when the conventional varistor is used alone as a noise filter, a current of about 100 A flows instantaneously when an electrostatic surge of several tens of kilovolts enters the varistor. the V 100A must be set below the breakdown voltage of the semiconductor component. On the other hand, since V 1 mA of the varistor needs to be secured about several times the rated voltage, a very large nonlinear coefficient is required to satisfy both. However, since there is a limit to the improvement of the nonlinear coefficient, there is a case where the conventional varistor alone cannot completely protect the semiconductor component from a high-voltage pulse. Therefore, conventionally, as shown in FIG. 4, a resistor 21 is connected in series to the signal line 20 of the varistor Z, and the semiconductor component 22 is protected from a high voltage pulse by the resistor 21. According to this, even if the non-linear coefficient of the varistor is about the same as the conventional one, the electrostatic surge can be absorbed.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上記従来の
バリスタに抵抗体を直列接続して保護回路を構成する場
合、回路基板にバリスタと抵抗体とを別々に実装するこ
とから、該抵抗体の分だけ部品点数が増えるとともに、
実装コストが上昇するという問題がある。また、抵抗体
の分だけ実装スペースが拡大することから、近年の電子
機器の分野における小型化に対応できないという問題も
ある。When a resistor is connected in series to the conventional varistor to form a protection circuit, the varistor and the resistor are separately mounted on a circuit board. As the number of parts increases,
There is a problem that mounting cost increases. Further, since the mounting space is increased by the amount corresponding to the resistor, there is a problem that it is not possible to cope with the recent miniaturization in the field of electronic devices.
【０００４】本発明は、上記従来の状況に鑑みてなされ
たもので、高電圧パルスの侵入による半導体部品の破
壊，誤動作を確実に防止できるとともに、部品点数，実
装コストを低減でき、しかも小型化に対応できる抵抗付
チップバリスタを提供することを目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and it is possible to reliably prevent destruction and malfunction of a semiconductor component due to intrusion of a high-voltage pulse, to reduce the number of components and mounting cost, and to reduce the size. It is an object of the present invention to provide a chip varistor with a resistor that can cope with the above.
【０００５】[0005]
【課題を解決するための手段】そこで請求項１の発明
は、焼結体内に少なくとも一対の内部電極を埋設し、該
各内部電極の両端面を上記焼結体の各側面に露出すると
ともに、該焼結体の少なくとも一側面に抵抗層を形成
し、該抵抗層を介して上記内部電極の一端面を導出した
ことを特徴とする抵抗付チップバリスタである。また、
請求項２の発明は、上記抵抗層を、抵抗シートを貼着し
たり，あるいは抵抗ペーストを塗布したりして形成した
ことを特徴としている。SUMMARY OF THE INVENTION Accordingly, a first aspect of the present invention is to embed at least a pair of internal electrodes in a sintered body, exposing both end surfaces of each of the internal electrodes to each side surface of the sintered body, A chip varistor with a resistor, wherein a resistance layer is formed on at least one side surface of the sintered body, and one end surface of the internal electrode is led out through the resistance layer. Also,
The invention according to claim 2 is characterized in that the resistance layer is formed by sticking a resistance sheet or applying a resistance paste.
【０００６】[0006]
【作用】請求項１の発明に係る抵抗付チップバリスタに
よれば、焼結体の側面に抵抗層を形成し、該抵抗層を内
部電極の一端面に接続したので、該抵抗層が付加された
内部電極を信号ラインに接続することによって、静電気
サージが侵入しても内部電極間のバリスタ部で高電圧パ
ルスを吸収するとともに、この時の吸収電圧が半導体部
品の破壊電圧より高い場合は上記抵抗層が吸収すること
となり、半導体部品の誤動作や破壊を確実に防止でき
る。また、上記焼結体の側面に抵抗層を形成するだけの
構造であるから、バリスタ機能と抵抗機能とを単一の素
子で得ることができ、従来のバリスタと抵抗体とを別々
に実装する場合に比べて部品点数を削減できるととも
に、実装コストを低減できる。さらに従来の抵抗体を不
要にできる分だけ実装スペースを縮小でき、電子機器の
小型化に対応できる。また、請求項２の発明では、抵抗
層を抵抗シートを貼着したり，あるいは抵抗ペースト塗
布したりして形成したので、抵抗層の厚さや面積を変え
ることにより、容易にかつ正確に抵抗値を制御できる。According to the chip varistor with the resistor according to the first aspect of the present invention, the resistor layer is formed on the side surface of the sintered body, and the resistor layer is connected to one end surface of the internal electrode. By connecting the internal electrode to the signal line, the varistor between the internal electrodes absorbs the high voltage pulse even if an electrostatic surge enters, and if the absorbed voltage at this time is higher than the breakdown voltage of the semiconductor component, Since the resistance layer absorbs, malfunction and destruction of the semiconductor component can be reliably prevented. In addition, since the structure has only a resistance layer formed on the side surface of the sintered body, the varistor function and the resistance function can be obtained by a single element, and the conventional varistor and the resistor are separately mounted. Compared with the case, the number of components can be reduced, and the mounting cost can be reduced. Furthermore, the mounting space can be reduced as much as the conventional resistor can be made unnecessary, and it is possible to cope with miniaturization of electronic devices. According to the second aspect of the present invention, since the resistance layer is formed by attaching a resistance sheet or applying a resistance paste, the resistance value can be easily and accurately changed by changing the thickness and area of the resistance layer. Can be controlled.
【０００７】[0007]
【実施例】以下、本発明の一実施例を図について説明す
る。図１ないし図３は本発明の一実施例による抵抗付チ
ップバリスタを説明するための図である。図において、
１は本実施例の抵抗付チップバリスタであり、これは直
方体状のセラミックス焼結体２の内部に第１，第２内部
電極３，４を交差させて埋設し、該焼結体２の左, 右端
面２ａ，２ｂに端面電極５，５を形成するとともに、上
記焼結体２の両側面２ｃ，２ｄの中央部に側面電極６，
６を形成して構成されている。また、上記焼結体２の、
第１，第２内部電極３，４に挟まれた部分は電圧非直線
特性を発現するセラミックス層７ａとなっており、該セ
ラミックス層７ａは所定のバリスタ電圧が得られる厚さ
に設定されている。さらに上記焼結体２のセラミックス
層７ａ以外の上部，及び下部はダミーとしてのセラミッ
クス層７ｂ，７ｃとなっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 to 3 are views for explaining a chip varistor with a resistor according to an embodiment of the present invention. In the figure,
Reference numeral 1 denotes a chip varistor with a resistor according to the present embodiment, which is embedded in a rectangular parallelepiped ceramic sintered body 2 with first and second internal electrodes 3 and 4 crossing each other. End electrodes 5 and 5 are formed on the right end surfaces 2a and 2b, and side electrodes 6 and 5 are formed at the center of both side surfaces 2c and 2d of the sintered body 2.
6 is formed. In addition, of the sintered body 2,
The portion sandwiched between the first and second internal electrodes 3 and 4 is a ceramic layer 7a that exhibits voltage non-linear characteristics, and the ceramic layer 7a is set to a thickness that allows a predetermined varistor voltage to be obtained. . Further, the upper and lower portions of the sintered body 2 other than the ceramic layer 7a are ceramic layers 7b and 7c as dummy.
【０００８】また、上記第１内部電極３の両端面３ａ，
３ｂは焼結体２の両側面２ｃ，２ｄに露出しており、残
りの端面は焼結体２内に封入されている。さらに上記第
１内部電極３の各端面３ａ，３ｂは上記側面電極６に接
続されている。さらにまた、上記第２内部電極４の両端
面４ａ，４ｂは上記焼結体２の左, 右端面２ａ，２ｂに
露出されており、残りの端面は焼結体２内に封入されて
いる。Further, both end surfaces 3a of the first internal electrode 3 are provided.
3 b is exposed on both side surfaces 2 c and 2 d of the sintered body 2, and the remaining end faces are sealed in the sintered body 2. Further, each end face 3 a, 3 b of the first internal electrode 3 is connected to the side electrode 6. Furthermore, both end surfaces 4a, 4b of the second internal electrode 4 are exposed to the left and right end surfaces 2a, 2b of the sintered body 2, and the remaining end surfaces are sealed in the sintered body 2.
【０００９】そして、上記焼結体２の右端面２ｂには抵
抗層８が形成されている。この抵抗層８は上記第２内部
電極４の端面４ｂに接続されており、これにより該第２
内部電極４は抵抗層８を介して上記端面電極５に接続さ
れている。A resistance layer 8 is formed on the right end face 2b of the sintered body 2. The resistance layer 8 is connected to the end face 4b of the second internal electrode 4, thereby forming the second internal electrode 4.
The internal electrode 4 is connected to the end face electrode 5 via a resistance layer 8.
【００１０】次に本実施例の抵抗付チップバリスタ１の
製造方法について説明する。まず、ＺｎＯ(97.8 mol
％),Ｂｉ2 Ｏ3 (0.5mol ％),ＭｎＯ(0.5mol ％),ＣＯ2
Ｏ3(0.5 mol ％),Ｓｂ2 Ｏ3(0.7 mol ％) を混合してな
るセラミックス材料に、有機バインダー，アルコールを
混合してスラリーを形成する。このスラリーからドクタ
ーブレード法により所定厚さのグリーンシートを形成
し、このグリーンシートを所定寸法の矩形状に切断して
多数のセラミックスシートを形成する。これにより、電
圧非直線特性を発現するセラミックス層７ａ，及びダミ
ーとしてのセラミックス層７ｂ，７ｃを多数枚形成す
る。次に、上記セラミックス層７ａの上面の中央部にＡ
ｇ/ Ｐｄ＝７／３からなるペーストを印刷して帯状の第
２内部電極４を形成する。この場合、該内部電極４の両
端面４ａ，４ｂのみがセラミックス層７ａの両外縁に位
置するように形成する。次いで、１枚のダミー用セラミ
ックス層７ｃの上面の中央部に上記第２内部電極４と交
差するよう上記ペーストを印刷して第１内部電極３を形
成する。この場合も、該内部電極３の両端面３ａ，３ｂ
のみがセラミックス層７ｃの両外縁に位置するように形
成する。次に、図３に示すように、上記セラミックス層
７ａの上部に多数枚のダミー用セラミックス層７ｂを重
ねるとともに、下部に第１内部電極３が形成されたセラ
ミックス層７ｃを重ねるとともに、残りのダミー用セラ
ミックス層７ｃを重ね、これをプレスで圧着して積層体
を形成する。これにより上記セラミックス層７ａを挟ん
で第１，第２内部電極３，４の交差部が対向し、かつ第
１，第２内部電極３，４の両端面３ａ，３ｂ，４ａ，４
ｂのみが積層体の各側面に露出するとともに、残りの各
端面が積層体内に埋設されることとなる。次いで、上記
積層体を空気中にて1000℃に加熱焼成して焼結体２を得
る。そして、上記焼結体２の右端面２ｂにカーボン，酸
化ルテニウムからなる抵抗シートを貼着した後、焼き付
けて抵抗層８を形成する。なお、この抵抗層は上記カー
ボン，酸化ルテニウムからなるペーストを塗布して形成
してもよい。最後に、上記焼結体２の左, 右端面２ａ，
２ｂ、及び両側面２ｃ，２ｄの中央部にＡｇ/ Ｐｄ＝７
／３からなるペーストを塗布した後、焼き付けて端面電
極５，側面電極６を形成する。これにより上記第１内部
電極３の両端面３ａ，３ｂは上記各側面電極６に接続さ
れることとなり、第２内部電極４の左端面４ａは端面電
極５に接続され、かつ右端面４ｂは抵抗層８を介して端
面電極５に接続される。これで本実施例の抵抗付チップ
バリスタ１が製造される。Next, a method of manufacturing the chip varistor 1 with a resistor according to the present embodiment will be described. First, ZnO (97.8 mol
%), Bi 2 O 3 (0.5 mol%), MnO (0.5 mol%), CO 2
An organic binder and an alcohol are mixed with a ceramic material obtained by mixing O 3 (0.5 mol%) and Sb 2 O 3 (0.7 mol%) to form a slurry. A green sheet having a predetermined thickness is formed from the slurry by a doctor blade method, and the green sheet is cut into a rectangular shape having a predetermined dimension to form a large number of ceramic sheets. As a result, a large number of ceramic layers 7a exhibiting voltage non-linear characteristics and ceramic layers 7b and 7c as dummy are formed. Next, A is placed at the center of the upper surface of the ceramic layer 7a.
A paste composed of g / Pd = 7/3 is printed to form the band-shaped second internal electrode 4. In this case, the inner electrode 4 is formed so that only both end surfaces 4a and 4b are located at both outer edges of the ceramic layer 7a. Next, the first internal electrode 3 is formed by printing the paste so as to intersect the second internal electrode 4 at the center of the upper surface of one dummy ceramic layer 7c. Also in this case, both end faces 3a, 3b of the internal electrode 3 are provided.
Only the ceramic layer 7c is formed on both outer edges. Next, as shown in FIG. 3, a large number of dummy ceramic layers 7b are stacked on the ceramic layer 7a, and a ceramic layer 7c on which the first internal electrode 3 is formed is stacked below the ceramic layer 7a. The ceramic layers for use 7c are stacked and pressed by a press to form a laminate. Thus, the intersections of the first and second internal electrodes 3 and 4 are opposed to each other with the ceramic layer 7a interposed therebetween, and both end faces 3a, 3b, 4a and 4 of the first and second internal electrodes 3 and 4 are provided.
Only b is exposed on each side face of the laminate, and the remaining end faces are embedded in the laminate. Next, the laminate is heated and fired at 1000 ° C. in the air to obtain a sintered body 2. Then, a resistance sheet made of carbon and ruthenium oxide is attached to the right end face 2b of the sintered body 2, and then baked to form a resistance layer 8. The resistance layer may be formed by applying a paste made of the above-mentioned carbon and ruthenium oxide. Finally, the left and right end faces 2a of the sintered body 2
Ag / Pd = 7 at the center of 2b and both sides 2c, 2d
After applying a paste consisting of, the end face electrode 5 and the side face electrode 6 are formed by baking. As a result, both end faces 3a and 3b of the first internal electrode 3 are connected to the side electrodes 6, the left end face 4a of the second internal electrode 4 is connected to the end face electrode 5, and the right end face 4b is connected to the resistance. It is connected to the end face electrode 5 via the layer 8. Thus, the chip varistor 1 with a resistor according to the present embodiment is manufactured.
【００１１】次に本実施例の作用効果について説明す
る。本実施例の抵抗付チップバリスタ１では、各端面電
極５を信号ラインに接続し、各側面電極６を接地ライン
に接続することにより、信号ラインから侵入する静電気
サージなどの高電圧パルスを第１，第２内部電極３，４
のセラミックス層７ａ部分で吸収し、側面電極６から放
出する。この時の吸収電圧が半導体部品の破壊電圧より
高い場合は抵抗層８がこの電圧を降下させる機能を有し
ている。このように本実施例によれば、焼結体２の右側
面２ｂに抵抗層８を形成し、該抵抗層８を介して第２内
部電極４の一端面４ｂを端面電極５に接続したので、上
述のように半導体部品の破壊電圧より大きい静電気サー
ジが侵入しても抵抗層８で抑制することができ、その結
果ＩＣ，ＬＳＩ等の半導体部品の誤動作や破壊を確実に
回避できる。また、本実施例では、上記焼結体２の抵抗
層８を形成するだけでよいから、１つの素子にバリスタ
機能と抵抗機能とを付加することができ、従来のバリス
タと抵抗体とを別々に実装する場合に比べて部品点数を
削減できるとともに、実装コストを低減でき、しかも実
装スペースを縮小して電子機器の小型化に対応できる。
さらに、本実施例では、上記抵抗層８の厚さ，面積等を
変えることにより、抵抗値を容易に設定できる。Next, the operation and effect of this embodiment will be described. In the resistive chip varistor 1 of the present embodiment, by connecting each end face electrode 5 to a signal line and connecting each side face electrode 6 to a ground line, a high voltage pulse such as an electrostatic surge intruding from the signal line is generated by the first. , Second internal electrodes 3 and 4
Is absorbed by the ceramic layer 7a and emitted from the side electrode 6. If the absorption voltage at this time is higher than the breakdown voltage of the semiconductor component, the resistance layer 8 has a function of lowering this voltage. As described above, according to the present embodiment, the resistance layer 8 is formed on the right side surface 2 b of the sintered body 2, and the one end surface 4 b of the second internal electrode 4 is connected to the end surface electrode 5 via the resistance layer 8. As described above, even if an electrostatic surge larger than the breakdown voltage of the semiconductor component enters, it can be suppressed by the resistance layer 8, and as a result, malfunction and destruction of the semiconductor component such as IC and LSI can be reliably avoided. Further, in this embodiment, since it is only necessary to form the resistance layer 8 of the sintered body 2, a varistor function and a resistance function can be added to one element, and the conventional varistor and resistor are separately provided. The number of components can be reduced as compared with the case of mounting on an electronic device, the mounting cost can be reduced, and the mounting space can be reduced to cope with the miniaturization of electronic devices.
Further, in this embodiment, the resistance value can be easily set by changing the thickness, the area, and the like of the resistance layer 8.
【００１２】なお、上記実施例では、抵抗層８を焼結体
２の右端面２ｂにのみ形成した場合を例にとったが、本
発明は焼結体２の左, 右端面２ａ，２ｂの両方に抵抗層
を形成してもよい。また、上記実施例では、焼結体２内
に一対の内部電極３，４を埋設したが、本発明はこれに
限るものではなく、複数組の内部電極を埋設したものに
も適用できる。In the above embodiment, the case where the resistance layer 8 is formed only on the right end face 2b of the sintered body 2 is taken as an example. However, the present invention is applied to the case where the left and right end faces 2a, 2b of the sintered body 2 are formed. A resistance layer may be formed on both. Further, in the above embodiment, the pair of internal electrodes 3 and 4 are embedded in the sintered body 2. However, the present invention is not limited to this, and the present invention can be applied to a case where a plurality of sets of internal electrodes are embedded.
【００１３】[0013]
【発明の効果】以上のように本発明に係る抵抗付チップ
バリスタによれば、焼結体の側面に抵抗層を形成し、該
抵抗層を介して内部電極の一端面を外部に導出したの
で、電源部，信号ラインの入，出力部から侵入した静電
気サージ等の高電圧パルスを吸収でき、半導体部品の誤
動作や破壊を確実に防止できる効果があり、また部品点
数，実装コストを低減できるとともに、実装スペースを
縮小して電子機器の小型化に貢献できる効果がある。As described above, according to the chip varistor with a resistor according to the present invention, the resistor layer is formed on the side surface of the sintered body, and one end face of the internal electrode is led out through the resistor layer. It can absorb high-voltage pulses such as electrostatic surges that have entered from the power supply and signal line input / output sections, effectively preventing malfunction and destruction of semiconductor components, and can reduce the number of components and mounting costs. This has the effect of reducing the mounting space and contributing to the miniaturization of electronic devices.
【図１】本発明の一実施例による抵抗付チップバリスタ
を説明するための断面図である。FIG. 1 is a cross-sectional view for explaining a chip varistor with a resistor according to one embodiment of the present invention.
【図２】上記実施例の抵抗付チップバリスタの斜視図で
ある。FIG. 2 is a perspective view of a chip varistor with a resistor according to the embodiment.
【図３】上記実施例の抵抗付チップバリスタの分解斜視
図である。FIG. 3 is an exploded perspective view of the chip varistor with resistor of the embodiment.
【図４】従来のバリスタに抵抗体を付加した状態を示す
等価回路図である。FIG. 4 is an equivalent circuit diagram showing a state in which a resistor is added to a conventional varistor.
１ 抵抗付チップバリスタ ２ 焼結体 ２ｂ 焼結体の端面（側面） ３，４ 第１，第２内部電極 ４ｂ 内部電極の一端面 ８ 抵抗層 DESCRIPTION OF SYMBOLS 1 Resistance chip varistor 2 Sintered body 2b End face (side face) of sintered body 3, 4 First and second internal electrodes 4b One end face of internal electrode 8 Resistance layer
Claims (2)
の内部電極を埋設し、該各内部電極の両端面を上記焼結
体の各側面に露出するとともに、該焼結体の少なくとも
一側面に抵抗層を形成し、該抵抗層を介して上記内部電
極の一端面を外部に導出したことを特徴とする抵抗付チ
ップバリスタ。At least one pair of internal electrodes are embedded in a ceramic sintered body, both end surfaces of each internal electrode are exposed on each side surface of the sintered body, and a resistance layer is provided on at least one side surface of the sintered body. A chip varistor with a resistor, wherein one end surface of the internal electrode is led out to the outside through the resistance layer.
シートを貼着して、又は抵抗ペーストを塗布して形成し
たことを特徴とする抵抗付チップバリスタ。2. The chip varistor with a resistor according to claim 1, wherein the resistor layer is formed by attaching a resistor sheet or applying a resistor paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3183828A JP2932768B2 (en) | 1991-06-27 | 1991-06-27 | Chip varistor with resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3183828A JP2932768B2 (en) | 1991-06-27 | 1991-06-27 | Chip varistor with resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH056810A JPH056810A (en) | 1993-01-14 |
| JP2932768B2 true JP2932768B2 (en) | 1999-08-09 |
Family
ID=16142557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3183828A Expired - Fee Related JP2932768B2 (en) | 1991-06-27 | 1991-06-27 | Chip varistor with resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2932768B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7099131B2 (en) | 2002-12-27 | 2006-08-29 | Murata Manufacturing Co., Ltd. | Surge absorber and surge absorber array |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100935735B1 (en) * | 2007-09-19 | 2010-01-06 | 주식회사 아모텍 | Surge absorber and method of manufacturing the surge absorber |
| KR101023331B1 (en) * | 2008-10-20 | 2011-03-18 | 주식회사 아모텍 | Touch key circuit and complex device for ESD protection in the touch key circuit |
-
1991
- 1991-06-27 JP JP3183828A patent/JP2932768B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7099131B2 (en) | 2002-12-27 | 2006-08-29 | Murata Manufacturing Co., Ltd. | Surge absorber and surge absorber array |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH056810A (en) | 1993-01-14 |
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