JPS6369202A - Manufacture of thermistor - Google Patents
Manufacture of thermistorInfo
- Publication number
- JPS6369202A JPS6369202A JP21361886A JP21361886A JPS6369202A JP S6369202 A JPS6369202 A JP S6369202A JP 21361886 A JP21361886 A JP 21361886A JP 21361886 A JP21361886 A JP 21361886A JP S6369202 A JPS6369202 A JP S6369202A
- Authority
- JP
- Japan
- Prior art keywords
- thermistor
- glass
- lead wires
- electrodes
- lead wire
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000011521 glass Substances 0.000 claims description 31
- 238000005219 brazing Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000003973 paint Substances 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000002003 electrode paste Substances 0.000 description 1
- 239000000156 glass melt Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Apparatuses And Processes For Manufacturing Resistors (AREA)
- Thermistors And Varistors (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産栗上坐■亙分豆
本発明は、高温測定時に用いられるサーミスタの製造方
法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a thermistor used in high temperature measurement.
■米少茨専
高温測定等に使用される直熱形のサーミスタは、従来、
サーミスタ素体の両面に電極を形成し、この電極にリー
ド線を接続してリード線の端部およびサーミスタ素体を
ガラスに埋設して高温度に耐えるようにしたディスク型
のサーミスタが一般に採用されている。この種のサーミ
スタの製造方法として、例えば、マンガン、ニッケル、
コバルト等のような金属酸化物の粉末原料を板状に焼結
させた本体の両面に、金、白金系の耐熱導電性塗料を焼
付けて電極を形成し、この電極にジュメットや白金等の
金属リード線を前記と同様の耐熱導電性塗料で接着して
乾燥した後、本体を短い管状のガラスに挿入し、このガ
ラスを高温で加熱溶融することによって、溶封とリード
線を接着した塗料の焼付けとを同時に行い、本体および
リード線の基部をガラスに埋設する方法が知られている
（特公昭５２−７５３５号公報参照）。■Direct heating type thermistors used for high temperature measurement, etc.
Disc-type thermistors are generally used, which have electrodes formed on both sides of the thermistor body, connect lead wires to these electrodes, and bury the ends of the lead wires and the thermistor body in glass to withstand high temperatures. ing. For example, manganese, nickel,
Electrodes are formed by baking gold or platinum-based heat-resistant conductive paint on both sides of the main body, which is made by sintering a powder raw material of metal oxide such as cobalt into a plate shape. After adhering the lead wires with the same heat-resistant conductive paint as above and drying, insert the main body into a short tube-shaped glass and heat and melt the glass at high temperature. There is a known method in which the main body and the base of the lead wire are buried in glass by simultaneously performing baking (see Japanese Patent Publication No. 7535/1983).
日が解゛ しようとする問題点
しかしながら、この種のディスク型サーミスタは、リー
ド線の焼付けと本体をガラスに溶封する工程とを同時に
行うことによって、酸化防止等の問題が回避されるもの
の、ガラスの溶封時にリード線を接着する耐熱導電性塗
料を焼付けるので、この塗料からガスが発生し、薄いガ
ラス層に無数の気泡や***が生じていた。このため、サ
ーミスタ内部に空気や湿気が浸入してサーミスタの耐湿
性、耐酸化性等が著しく低下し、高温域の安定性が経時
的に下降していくという問題があった。Problems that will be solved in the near future However, with this type of disk-type thermistor, problems such as oxidation prevention can be avoided by simultaneously performing the baking of the lead wire and the process of melt-sealing the main body into glass. When the glass is melt-sealed, the heat-resistant, conductive paint that bonds the lead wires is baked, which generates gas and creates numerous bubbles and small holes in the thin glass layer. For this reason, there is a problem in that air and moisture infiltrate into the thermistor, resulting in a significant decrease in the moisture resistance, oxidation resistance, etc. of the thermistor, and stability in a high temperature range deteriorates over time.
そこで、本発明は、ガラスに気泡が発生する問題を回避
して耐湿性、耐酸化性を向上させ、高温域の安定性に優
れたサーミスタを提供することを目的としている。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a thermistor that avoids the problem of air bubbles occurring in glass, improves moisture resistance and oxidation resistance, and has excellent stability in a high temperature range.
間 壱を解°するための
上記目的を達成するため本発明は、原料の粉末を成形し
て焼成したサーミスタ素体の両面に電極を形成した後、
この電極に金属ろう材を介してリード線を接着し、この
リード線とサーミスタ素体に筒状のガラスをのせて、こ
のガラスを加熱溶融することにより、サーミスタ素体お
よびリード線の端部をガラス内に埋設することを特徴と
している。In order to achieve the above-mentioned object of solving the problem, the present invention is to form electrodes on both sides of a thermistor body made by molding and firing raw material powder, and then
A lead wire is bonded to this electrode via a metal brazing material, a cylindrical glass is placed on the lead wire and the thermistor body, and the end of the thermistor body and lead wire is bonded by heating and melting the glass. It is characterized by being embedded within the glass.
天−」Ｌ−桝
第１図は、本発明の実施例を示すサーミスタの寝所面図
である。FIG. 1 is a side view of a thermistor showing an embodiment of the present invention.
サーミスタは、チップ状のサーミスタ素体１の両面に電
極２，３を形成しており、この電極２゜３にリード、ｖ
！４．５が接着されていて、このリード＆１４．５の一
端部およびサーミスタ素体１がガラス６に埋設されてデ
ィスク型に構成されている。The thermistor has electrodes 2 and 3 formed on both sides of a chip-shaped thermistor body 1, and a lead and a v
! 4.5 is bonded, and one end of the lead &14.5 and the thermistor body 1 are embedded in the glass 6 to form a disc-shaped structure.
つぎに、サーミスタの製造方法を図面に基づいて以下に
説明する。Next, a method for manufacturing a thermistor will be explained below based on the drawings.
マンガン、ニッケル、コバルト等の酸化物を所定の配合
比で混合粉砕した後、バインダを添加した粉体に５トン
の圧力を加えて例えば直径５■、厚さ３Ｃ１ｍの板状体
を成形する。そして、この板状体を１２５０℃の高温で
４時間焼成した後、この焼成体をスライスして研磨加工
機により両面を研磨し厚さＯ，：３ｍのウェハ状のサー
ミスタ素体を形成する。続いて、このウェハ状のサーミ
スタ素体の両面に電極ペーストを焼付けて電極を形成し
た後、このサーミスタ素体をダイシングして例えば直径
０．５Ｍ１Ａ角のチップ状サーミスタ素体を作製する。After mixing and pulverizing oxides such as manganese, nickel, and cobalt in a predetermined mixing ratio, a pressure of 5 tons is applied to the powder to which a binder has been added to form a plate-shaped body having a diameter of 5 cm and a thickness of 3 C1 m, for example. After firing this plate-shaped body at a high temperature of 1250° C. for 4 hours, the fired body is sliced and both surfaces are polished using a polishing machine to form a wafer-shaped thermistor element having a thickness of O: 3 m. Subsequently, electrode paste is baked on both sides of this wafer-shaped thermistor element to form electrodes, and then this thermistor element is diced to produce a chip-shaped thermistor element having a diameter of, for example, 0.5M1A square.
そして、第２図に示すカーボンヒータ９に穿設された穴
部１０の底面１１に設けられた挿通孔１２，１３に、白
金またはジュメット線等のようなガラスに気密封着可能
なリード線４．５を２零挿通すると共に、リート線４，
５の下端を上下動可能な位置合せ台１４に置く。次に、
穴部１０の底面１１から上方に突出したリード線４．５
間に、例えば直径０．３鶴程度で銀ろう等の金属ろう材
７，８を配置してリード線４．５によりサーミスタ素体
１および金属ろう材７．８を挟んだ状態でカーボンヒー
タ９に通電する。加熱により金属ろう材７．８が溶融す
ると、電極２．３にリード線４，５が接着されて冷却固
化される。続いて、位置合せ台１４を上方に移動させ、
リード線４．５が接着されたサーミスタ素体１を穴部１
０の底面１１から僅かに離間させておき、後述のガラス
溶融時に液状のガラスがサーミスタ素体１の下部に廻り
込み易いようにしておく。そして、カーボンヒータ９の
穴部１０に開口を有する筒状のガラス６を挿入してサー
ミスタ素体１にガラス６を挿入してサーミスタ素体１に
ガラス６をのせ、再びカーボンヒータ９に通電し、金属
ろう材７゜８の加熱時より低温の７５０℃で１０分間ガ
ラス６を加熱する。このとき、ガラス６の先端側から開
口側に向けて加熱し、ガラス６内に気泡が残らないよう
に溶融していく。なお、ガラスの溶融に伴いサーミスタ
素体１は液状に溶融したガラスで覆われていくが、銀ろ
うはガラスより融点が高いので、電極２．３にリード線
４，５が接着された状態に維持されている。サーミスタ
素体１およびリード線４．５がガラス６に被覆されると
、ガラス６を冷却固化する。これにより、サーミスタ素
体１およびリード線４．５の一端がガラス６に埋設され
て、ビード型に成形されたサーミスタが製造される。Lead wires 4 made of platinum or Dumet wire, which can be hermetically sealed to glass, are inserted into insertion holes 12 and 13 provided in the bottom surface 11 of the hole 10 made in the carbon heater 9 shown in FIG. .5 through 2 zeros, and the rieet wire 4,
5 is placed on a vertically movable positioning table 14. next,
A lead wire 4.5 protrudes upward from the bottom surface 11 of the hole 10.
A metal brazing material 7, 8 such as silver solder is placed between them, and the carbon heater 9 is connected with the thermistor body 1 and the metal brazing material 7.8 sandwiched between them by the lead wire 4.5. energize. When the metal brazing material 7.8 is melted by heating, the lead wires 4 and 5 are bonded to the electrode 2.3 and solidified by cooling. Next, move the alignment table 14 upward,
The thermistor element 1 to which the lead wire 4.5 is glued is inserted into the hole 1
0, so that liquid glass can easily get around to the lower part of the thermistor body 1 during glass melting, which will be described later. Then, a cylindrical glass 6 having an opening is inserted into the hole 10 of the carbon heater 9, the glass 6 is inserted into the thermistor element 1, the glass 6 is placed on the thermistor element 1, and the carbon heater 9 is energized again. , the glass 6 is heated for 10 minutes at 750°C, which is lower than when heating the metal brazing material 7°8. At this time, the glass 6 is heated from the tip side toward the opening side, and the glass 6 is melted so that no bubbles remain inside the glass 6. As the glass melts, the thermistor element 1 becomes covered with liquid molten glass, but since silver solder has a higher melting point than glass, the lead wires 4 and 5 are glued to the electrodes 2.3. Maintained. When the thermistor body 1 and the lead wires 4.5 are covered with glass 6, the glass 6 is cooled and solidified. As a result, the thermistor body 1 and one end of the lead wire 4.5 are embedded in the glass 6, and a bead-shaped thermistor is manufactured.
溌訓Ｉυ九果
以上説明したように本発明は、金属ろう材で電極にリー
ド線を接着したサーミスタ素体をガラスに溶封する際、
ガスが発生せず従ってガラスには気泡等が殆ど存在しな
いから、外気の進入が略完全に遮断されるので、耐湿性
、耐酸化性が飛躍的に向上し、高温域の安定性に優れた
高精度のサーミスタを得ることができる。また、サーミ
スタ素体の電極にリード線を接着する際に、導電ペース
トや半田等を使用しないので、サーミスタ製造工程中の
加工変化が少なく、エージング特性も向上する。As explained above, in the present invention, when a thermistor element having a lead wire bonded to an electrode with a metal brazing material is melt-sealed to glass,
Since no gas is generated and there are almost no bubbles in the glass, the entry of outside air is almost completely blocked, resulting in dramatically improved moisture resistance and oxidation resistance, and excellent stability in high temperature ranges. A highly accurate thermistor can be obtained. Furthermore, since conductive paste, solder, etc. are not used when bonding the lead wires to the electrodes of the thermistor body, there are few processing changes during the thermistor manufacturing process, and aging characteristics are also improved.
第１図は本発明の実施例を示すサーミスタの縦断面、第
２図および第３図はサーミスタの製造工程を順次説明す
る断面図である。
１・・・サーミスタ素体、２．３・・・電極、４．５・
・・リード線、６・・・ガラス、７．８・・・金属ろう
材。
特許出願人 二 株式会社 村田製作所手続補正書（自
船
１、事件の表示
昭和６１年特許願第２１３６１８号
２、発明の名称
サーミスタの製造方法
３、補正をする者
事件との関係 特許出願人
住所 京都府長岡京市天神二丁目２６番１０号名称 （
６２３）株式会社 打出製作所代表者 村１）昭
４、代理人
第１図FIG. 1 is a longitudinal section of a thermistor showing an embodiment of the present invention, and FIGS. 2 and 3 are sectional views sequentially explaining the manufacturing process of the thermistor. 1... Thermistor element body, 2.3... Electrode, 4.5.
...Lead wire, 6...Glass, 7.8...Metal brazing material. Patent Applicant 2 Murata Manufacturing Co., Ltd. Procedural Amendment (own ship 1, Indication of the case 1986 Patent Application No. 213618 2, Name of the invention Method for manufacturing thermistor 3, Person making the amendment Relationship with the case Patent applicant address 2-26-10 Tenjin, Nagaokakyo City, Kyoto Prefecture Name (
623) Uchide Seisakusho Co., Ltd. Representative Mura 1) Showa 4, Agent Figure 1
Claims (1)
に電極を形成した後、この電極に金属ろう材を介してリ
ード線を接着し、このリード線とサーミスタ素体に筒状
のガラスをのせて、このガラスを加熱溶融することによ
り、サーミスタ素体およびリード線の端部をガラス内に
埋設することを特徴とするサーミスタの製造方法。After forming electrodes on both sides of the thermistor body, which is formed by molding and firing raw material powder, lead wires are bonded to these electrodes via a metal brazing material, and a cylindrical glass is placed on the lead wires and the thermistor body. A method for producing a thermistor, comprising: embedding the thermistor body and the ends of the lead wires in the glass by heating and melting the glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21361886A JPS6369202A (en) | 1986-09-10 | 1986-09-10 | Manufacture of thermistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21361886A JPS6369202A (en) | 1986-09-10 | 1986-09-10 | Manufacture of thermistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6369202A true JPS6369202A (en) | 1988-03-29 |
Family
ID=16642154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21361886A Pending JPS6369202A (en) | 1986-09-10 | 1986-09-10 | Manufacture of thermistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6369202A (en) |
-
1986
- 1986-09-10 JP JP21361886A patent/JPS6369202A/en active Pending
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