JPS5910842A - Dew condensation detecting element - Google Patents
Dew condensation detecting elementInfo
- Publication number
- JPS5910842A JPS5910842A JP11853382A JP11853382A JPS5910842A JP S5910842 A JPS5910842 A JP S5910842A JP 11853382 A JP11853382 A JP 11853382A JP 11853382 A JP11853382 A JP 11853382A JP S5910842 A JPS5910842 A JP S5910842A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- electrodes
- dew condensation
- essentially consisting
- terminal
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、高信頼性にて経済的に有利な結露感知素子に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a highly reliable and economically advantageous condensation sensing element.
従来技術による結露感知素子の一実施例を第１図に示す
。本実施例はセラミック基板１上に、パラジウムと銀を
主成分とし半田付可能な端子電極２．２′と、酸化ルテ
ニウムを主成分とし対向する電極６，３′と、多孔質酸
化金属を主成分とする感湿体４とを順次印刷焼成して形
成した後、端子電極２．２′に各々リード線５，５′な
半田付は接続して形成したものである。本素子は、リー
ド線５．５′間に′重圧を加えた状態で、素子上に水が
付着することにより感湿体４が吸水して、電極３．３′
間の抵抗値が下降するのを検出する原理であるので、第
１図のＡ−Ａ’線における断面拡大図である第２図に示
すように、端子電極２，２′間に水７が付着することが
あり、リード＃５，５′間に加わる重圧が一定値以上に
なると、端子電極２，２′は銀を含有しているために、
その間に銀のイオン化成箔と嫁金楓の析出をおこして短
絡に至り、結露感知素子の機能が不可逆的に損なわれる
欠点があった。An example of a conventional dew condensation sensing element is shown in FIG. In this embodiment, on a ceramic substrate 1, there are solderable terminal electrodes 2 and 2' mainly made of palladium and silver, opposing electrodes 6 and 3' mainly made of ruthenium oxide, and electrodes 6 and 3' made mainly of porous metal oxide. After sequentially printing and baking the component moisture sensitive element 4, the lead wires 5 and 5' are connected to the terminal electrodes 2 and 2' by soldering. In this element, when a heavy pressure is applied between the lead wires 5 and 5', water adheres to the element and the moisture sensitive element 4 absorbs water, causing the electrodes 3 and 3' to absorb water.
Since the principle is to detect a decrease in the resistance value between the terminal electrodes 2 and 2', water 7 is detected between the terminal electrodes 2 and 2', as shown in FIG. If the pressure applied between leads #5 and 5' exceeds a certain value, since the terminal electrodes 2 and 2' contain silver,
During this time, the ionized silver foil and the bride gold maple precipitate, resulting in a short circuit, which has the drawback of irreversibly impairing the function of the dew condensation sensing element.
即わち、端子電極２．２′は半田６により被覆してあっ
ても、セラミック基板１との界面においては被接は薄く
効果的ではない。That is, even if the terminal electrodes 2.2' are covered with the solder 6, the contact is thin and ineffective at the interface with the ceramic substrate 1.
また上記欠点を生じない端子電極材料としては、金があ
るが、金は高価格であってしかも耐半田性が著しく低い
欠点を有している。Gold is a terminal electrode material that does not have the above-mentioned drawbacks, but gold is expensive and has extremely low solder resistance.
本発明の目的は、銀を含有する低価格で牛田付可能な導
体を、端子市１極として、信頼性を損なうことｒｘ （
利用し、低価格で高倍軸性な結露感知素子を提供するこ
とにある。The purpose of the present invention is to reduce the reliability of a low-cost conductor containing silver and using it as a single terminal terminal, thereby impairing its reliability.
It is an object of the present invention to provide a dew condensation sensing element which is low in price and has a high multiplier.
本発明は上記目的を実現するために、半田付けした端子
電極を絶縁性にて耐水性の加熱硬化型樹脂組成物により
被覆隠蔽するものである。In order to achieve the above object, the present invention covers and conceals soldered terminal electrodes with an insulating and water-resistant thermosetting resin composition.
以下、本発明の一実施例を第３図、及び第６図のＡ −
Ａ’線断面拡大図である第４図により説明する。本実施
例は、アルミナ等を主成分とする絶縁性のセラミック基
板１上に、パラジウムと銀を主成分とする導電ペースト
を印刷し、７００〜９００°Ｃで焼成して端子電極２．
２′を形成した後、該電極に各々接続するように酸化ル
テニウムを主成分とする導電ペーストを印刷し、７００
〜９００°Ｃで焼成して対向面の長い１対の電極３゜３
′を形成し、更に該電極３．６′間を接続するようにチ
タン酸バリウムを主成分とする絶縁体ペーストを印刷し
、６００〜９００°Ｃで焼成して多孔質吸湿性の感湿体
４を形成し、次に端子電極２゜２′にリード線５，５′
を各々半田６にて接続した後、半田乙におおわれた端子
電極２，２′を更に隠蔽するようにエポキシ樹脂を主成
分とする絶縁性耐水性の加熱硬化型樹脂組成物を塗布し
８０〜１５０°Ｃで硬化して樹脂膜８を形成して、形成
するものである。Hereinafter, one embodiment of the present invention will be described in FIGS. 3 and 6.
This will be explained with reference to FIG. 4, which is an enlarged cross-sectional view taken along line A'. In this example, a conductive paste mainly composed of palladium and silver is printed on an insulating ceramic substrate 1 mainly composed of alumina or the like, and is baked at 700 to 900°C to form terminal electrodes 2.
After forming 2′, a conductive paste mainly composed of ruthenium oxide was printed so as to be connected to the electrodes, and 700
A pair of electrodes with long opposing surfaces fired at ~900°C 3°3
', and furthermore, an insulating paste containing barium titanate as a main component is printed so as to connect between the electrodes 3 and 6', and baked at 600 to 900°C to form a porous hygroscopic moisture sensitive body. 4, and then connect the lead wires 5, 5' to the terminal electrode 2゜2'.
After connecting them with solder 6, an insulating, water-resistant, thermosetting resin composition containing epoxy resin as a main component is applied to further hide the terminal electrodes 2, 2' covered with solder 6. The resin film 8 is formed by curing at 150°C.
本実施例によれば、素子上に水が付着しても、銀を含有
する端子電極２．２′は、樹脂膜８に隠蔽されており、
銀と水の接触がないため銀のイオン化反応は生じず、従
って端子電極２，２′間が鉄金属の析出により不可逆的
に短絡することはない。According to this embodiment, even if water adheres to the element, the terminal electrodes 2 and 2' containing silver are hidden by the resin film 8.
Since there is no contact between silver and water, no ionization reaction of silver occurs, and therefore no irreversible short circuit occurs between the terminal electrodes 2 and 2' due to precipitation of iron metal.
本発明によれば、結露感知素子の端子電極として、比較
的低価格で半田付性良好な銀含有材料を使用しても、端
子電極を絶縁性でかつ耐水性の樹脂膜で隠蔽できるので
、結露感知素子が不可逆的に短絡する故障の発生を回避
できる効果がある。According to the present invention, even if a silver-containing material with relatively low cost and good solderability is used as the terminal electrode of the dew condensation sensing element, the terminal electrode can be hidden with an insulating and water-resistant resin film. This has the effect of avoiding the occurrence of a failure in which the dew condensation sensing element is irreversibly short-circuited.
第１図は、従来技術による結露感知素子の一実施例の平
面図、第２図は第１図のＡ−Ａ’ｉ矢視断面拡大図に付
着水を加えた状態図である。
第３図は、本発明による結露感知素子の一実施例の平面
図、第４図は第３図のＡ−Ａ’線矢視断面拡大図である
。
１・・・セラミック基板 ２．２′・・・端子電極６
．５′・・・対向を極 ４・・・感湿体５．５′
・・・リード線 ６・・・半田７・・・水
８・・・樹脂膜オ１図
寸 ２ 図FIG. 1 is a plan view of an embodiment of a conventional dew condensation sensing element, and FIG. 2 is an enlarged cross-sectional view taken along the line A-A'i in FIG. 1 with attached water added thereto. FIG. 3 is a plan view of an embodiment of the dew condensation sensing element according to the present invention, and FIG. 4 is an enlarged cross-sectional view taken along the line AA' in FIG. 1...Ceramic substrate 2.2'...Terminal electrode 6
．． 5'...Opposite pole 4...Moisture sensitive element 5.5'
...Lead wire 6...Solder 7...Water
8...Resin film size 1 diagram 2 diagram
Claims (1)
々接続する一対の対向電極と、この２つの対向電極を被
覆接続する感湿抵抗体とを形成し、上記端子電極にリー
ド線をボ気的に接続してなる結露感知素子において、該
端子電極を絶縁性にて耐水性の加熱硬化型樹脂組成物に
より被覆隠蔽してなることを特徴とする結露感知素子。A pair of terminal electrodes, a pair of opposing electrodes each connected to the electrodes, and a moisture sensitive resistor covering and connecting these two opposing electrodes are formed on a ceramic insulating substrate, and lead wires are connected to the terminal electrodes. What is claimed is: 1. A dew condensation sensing element, characterized in that the terminal electrode is covered and concealed with an insulating and water-resistant thermosetting resin composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11853382A JPS5910842A (en) | 1982-07-09 | 1982-07-09 | Dew condensation detecting element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11853382A JPS5910842A (en) | 1982-07-09 | 1982-07-09 | Dew condensation detecting element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5910842A true JPS5910842A (en) | 1984-01-20 |
Family
ID=14738944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11853382A Pending JPS5910842A (en) | 1982-07-09 | 1982-07-09 | Dew condensation detecting element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5910842A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100680237B1 (en) | 2004-05-03 | 2007-02-08 | 이엠씨마이크로시스템 주식회사 | Capacitive humidity sensor, its fabrication method and its connection method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5078374A (en) * | 1973-11-09 | 1975-06-26 |
-
1982
- 1982-07-09 JP JP11853382A patent/JPS5910842A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5078374A (en) * | 1973-11-09 | 1975-06-26 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100680237B1 (en) | 2004-05-03 | 2007-02-08 | 이엠씨마이크로시스템 주식회사 | Capacitive humidity sensor, its fabrication method and its connection method |
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