JPH06310302A - Resistor provided with lead wire and its manufacture - Google Patents

Resistor provided with lead wire and its manufacture

Info

Publication number
JPH06310302A
JPH06310302A JP5117692A JP11769293A JPH06310302A JP H06310302 A JPH06310302 A JP H06310302A JP 5117692 A JP5117692 A JP 5117692A JP 11769293 A JP11769293 A JP 11769293A JP H06310302 A JPH06310302 A JP H06310302A
Authority
JP
Japan
Prior art keywords
lead wire
film
resistor
resistance
insulator
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
Application number
JP5117692A
Other languages
Japanese (ja)
Inventor
Tadashi Shishiba
忠司 紫芝
Masaru Shimodaira
賢 下平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koa Corp
Original Assignee
Koa Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koa Corp filed Critical Koa Corp
Priority to JP5117692A priority Critical patent/JPH06310302A/en
Publication of JPH06310302A publication Critical patent/JPH06310302A/en
Pending legal-status Critical Current

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  • Non-Adjustable Resistors (AREA)
  • Details Of Resistors (AREA)

Abstract

PURPOSE:To obtain a resistor whose high-voltage-pulse-resistant characteristic is high by a method wherein a reistance film is formed on the surface of a cylindrical insulator, hollow parts are formed in both edges of the cylindrical insulator, tip parts of lead wires are inserted into the hollow parts and the lead wires are fixed by a thick-film electrode paste which can be fired in a neutral atmosphere. CONSTITUTION:Hollow parts 8 are formed respectively in both edges of a cylindrical insulator 1. Tips of lead wires 4 are inserted respectively into the hollow parts 8, and the lead wires are connected and fixed by thick-film electrodes 7 for lead-wire fixation. The thick-film electrodes 7 for lead-wire fixation are formed by firing a thick-film electrode paste which can be fired in a neutral atmosphere. A resistance film 2 is formed by firing a thick-film resistance paste which can be fired in a neutral atmosphere. Thereby, the effective length between the electrodes can be made long, and the high-voltage-pulse- resistant characteristic of the title resistor can be increased.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はリード線付き抵抗器及び
その製造方法に係り、特に耐高圧パルス特性に優れたリ
ード線付き抵抗器及びその製造方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resistor with a lead wire and a manufacturing method thereof, and more particularly to a resistor with a lead wire excellent in high-voltage pulse resistance and a manufacturing method thereof.

【0002】[0002]

【従来の技術】図2は、従来のリード線付き抵抗器の断
面図である。従来、耐高圧パルス特性を有する抵抗器
は、図2に示す構造のリード線付き抵抗器が一般的であ
り、円柱状碍子9の表面には、厚膜抵抗ペーストを塗布
し大気中にて焼成して抵抗皮膜2が形成されている。抵
抗皮膜2には、カッティングライン3が設けられ、抵抗
値が調整されている。この抵抗器のリード線4は、電極
(金属)キャップ6に接続固定されており、電極(金
属)キャップ6は、円柱状碍子9の両端の円柱状部分に
嵌合され抵抗皮膜2に接触固定されている。抵抗皮膜2
及び電極(金属)キャップ6の表面は、オーバーガラス
又は樹脂等の保護コート5により被覆されている。
2. Description of the Related Art FIG. 2 is a sectional view of a conventional resistor with lead wire. 2. Description of the Related Art Conventionally, a resistor having a high-voltage pulse resistance is generally a resistor with a lead wire having a structure shown in FIG. 2, and a thick film resistor paste is applied to the surface of a cylindrical insulator 9 and fired in the atmosphere. Then, the resistance film 2 is formed. The resistance film 2 is provided with a cutting line 3 to adjust the resistance value. The lead wire 4 of this resistor is connected and fixed to an electrode (metal) cap 6, and the electrode (metal) cap 6 is fitted to the cylindrical portions at both ends of the cylindrical insulator 9 and fixed in contact with the resistance film 2. Has been done. Resistive film 2
The surface of the electrode (metal) cap 6 is covered with a protective coat 5 such as overglass or resin.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記従
来のリード線付き抵抗器は、電極(金属)キャップ6を
抵抗皮膜2に被せる構造上、円柱状碍子表面の抵抗皮膜
の有効長が短くなるという問題が生じていた。そのため
高圧パルスを印加すると、円柱状碍子の両端のキャップ
6間、又は、抵抗皮膜2のカッティングライン3間でス
パークが発生し易く、耐圧を制限していた。係る従来の
リード線付き抵抗器のインパルス耐圧は、一例として碍
子サイズが直径2.5mm、長さ8.0mmのもので、
3kV程度であり、それ以上の高電圧では使用すること
ができなかった。
However, in the conventional resistor with lead wire, the effective length of the resistive coating on the surface of the cylindrical insulator is shortened due to the structure in which the electrode (metal) cap 6 is covered with the resistive coating 2. There was a problem. Therefore, when a high-voltage pulse is applied, sparks are easily generated between the caps 6 at both ends of the cylindrical insulator or between the cutting lines 3 of the resistance film 2 and the withstand voltage is limited. The impulse withstand voltage of such a conventional resistor with a lead wire is, for example, an insulator having a diameter of 2.5 mm and a length of 8.0 mm.
It was about 3 kV and could not be used at a higher voltage.

【0004】本発明は係る従来技術の問題点に鑑み、よ
り高い耐高圧パルス特性を有する抵抗器及びその製造方
法を提供することを目的とする。
In view of the problems of the prior art, it is an object of the present invention to provide a resistor having higher withstand high voltage pulse characteristics and a method of manufacturing the same.

【0005】[0005]

【課題を解決するための手段】本発明のリード線付き抵
抗器は、円柱状の碍子の表面には抵抗皮膜が形成され、
該円柱状の碍子の両端面には空孔部が設けられ、該空孔
部にはリード線の先端部が挿入され、中性雰囲気で焼成
可能な厚膜電極ペーストにより固定されていることを特
徴とする。
In the resistor with lead wire of the present invention, a resistance film is formed on the surface of a cylindrical insulator,
Voids are provided on both end faces of the cylindrical insulator, and the tip of the lead wire is inserted into the voids and fixed by a thick film electrode paste that can be fired in a neutral atmosphere. Characterize.

【0006】本発明のリード線付き抵抗器の製造方法
は、円柱状の碍子の両端面に空孔部が設けられた碍子を
準備する工程と、リード線の先端と前記碍子の空孔部と
に中性雰囲気で焼成可能な厚膜電極ペーストを塗布する
工程と、該リード線の先端を前記碍子の両端面の空孔部
に挿入して結合後、中性雰囲気により焼成しリード線付
き碍子を得る工程と、前記円柱状の碍子表面に中性雰囲
気で焼成可能な厚膜抵抗ペーストを塗布し、中性雰囲気
により焼成し抵抗皮膜を形成する工程と、抵抗値調整の
ための抵抗皮膜のカッティングを行い、その後保護コー
トを施す工程とからなることを特徴とする。
A method of manufacturing a resistor with a lead wire according to the present invention comprises a step of preparing an insulator in which a hole portion is provided on both end surfaces of a cylindrical insulator, a tip of a lead wire and a hole portion of the insulator. In the step of applying a thick film electrode paste that can be fired in a neutral atmosphere, and by inserting the tips of the lead wires into the holes of both end faces of the insulator and bonding them, firing in a neutral atmosphere and an insulator with a lead wire. And a step of applying a thick film resistor paste that can be fired in a neutral atmosphere to the surface of the cylindrical insulator, fired in a neutral atmosphere to form a resistance film, and a resistance film for adjusting the resistance value. It is characterized by comprising a step of cutting and then applying a protective coat.

【0007】[0007]

【作用】円柱状の碍子の両端面に空孔部を設け、リード
線の先端を中性雰囲気で焼成可能な厚膜電極ペーストに
より固定することから、リード線と抵抗皮膜とを円柱状
碍子の両端面において接続を行うことができる。このた
め、従来の金属キャップにより被われていた部分の円柱
状碍子の表面の抵抗皮膜の両端間の有効長が短くなると
いう問題点が解決される。従って、耐高圧パルス特性に
優れたリード線付き抵抗器が提供される。
[Function] Since holes are provided on both end faces of the cylindrical insulator and the tip of the lead wire is fixed by the thick film electrode paste that can be fired in a neutral atmosphere, the lead wire and the resistance film are formed on the cylindrical insulator. Connections can be made at both ends. Therefore, the problem that the effective length between both ends of the resistance coating on the surface of the cylindrical insulator covered with the conventional metal cap becomes short is solved. Therefore, a resistor with a lead wire having excellent high-voltage pulse resistance is provided.

【0008】[0008]

【実施例】以下、本発明の一実施例について添付図面を
参照しながら説明する。図1は、本発明の一実施例のリ
ード線付き抵抗器の断面図である。円柱状碍子1の表面
には、抵抗皮膜2が設けられ、抵抗皮膜2には抵抗値調
整のためのカッティングライン3が設けられている。そ
して、抵抗皮膜2の表面は、オーバーガラス又は樹脂か
らなる保護コート5により被覆されている構造は図2に
示す従来のリード線付き抵抗器の構造と同じである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of a resistor with a lead wire according to an embodiment of the present invention. A resistance film 2 is provided on the surface of the cylindrical insulator 1, and the resistance film 2 is provided with a cutting line 3 for adjusting the resistance value. The structure in which the surface of the resistance film 2 is covered with the protective coat 5 made of overglass or resin is the same as the structure of the conventional resistor with lead wire shown in FIG.

【0009】円柱状碍子1の両端面には、それぞれ空孔
部8が設けられている。そして空孔部8にはそれぞれリ
ード線4の先端が挿入され、リード線固定用厚膜電極7
により接続固定されている。リード線固定用厚膜電極7
は、中性雰囲気で焼成可能な厚膜電極ペースト(例え
ば、銅ペースト、ニッケルペースト)により焼成して形
成されたものである。又、抵抗皮膜2は、中性雰囲気で
焼成可能な厚膜抵抗ペースト(例えば、Ta/TaN系
ペースト、LaB6 系ペースト、SnO2 系ペースト)
により、焼成して形成されたものである。
Holes 8 are provided on both end faces of the cylindrical insulator 1, respectively. Then, the tips of the lead wires 4 are inserted into the holes 8 respectively, and the lead wire fixing thick film electrode 7 is inserted.
The connection is fixed by. Thick film electrode for fixing lead wire 7
Is formed by firing a thick film electrode paste (for example, copper paste or nickel paste) that can be fired in a neutral atmosphere. The resistance film 2 is a thick film resistance paste that can be fired in a neutral atmosphere (eg, Ta / TaN-based paste, LaB 6- based paste, SnO 2 -based paste).
Is formed by firing.

【0010】中性雰囲気で焼成を行うことにより、従来
の大気中での焼成によるリード線表面の酸化を防止する
ことができる。
By firing in a neutral atmosphere, it is possible to prevent the surface of the lead wire from being oxidized by conventional firing in air.

【0011】なお、中性雰囲気としては、窒素雰囲気の
他に例えばヘリウム(He)やアルゴン(Ar)等の不
活性ガスを用いることもできる。なお、還元性雰囲気
(例えば水素ガス等)で焼成した場合には、厚膜電極ペ
ーストや厚膜抵抗ペーストは、それ自体の酸化物が分解
されて金属等に還元されてしまう。従って、焼成された
結果として形成される抵抗皮膜あるいは電極皮膜は、碍
子との密着強度が減少すると考えられ、実用上好ましく
ないものと考えられる。
As the neutral atmosphere, an inert gas such as helium (He) or argon (Ar) may be used in addition to the nitrogen atmosphere. When firing in a reducing atmosphere (for example, hydrogen gas), the thick-film electrode paste or the thick-film resistance paste is decomposed into its metal oxide or the like. Therefore, it is considered that the resistance film or the electrode film formed as a result of the firing has a reduced adhesion strength with the insulator, which is not preferable in practice.

【0012】以下に本発明の一実施例のリード線付き抵
抗器の製造方法について説明する。まず、両端面に空孔
部が設けられた直径2.5mm、長さ8.0mmの円柱
状の碍子1を準備する。この空孔部8は図示するような
一本の貫通孔でもよく、空孔部は中途で碍子と一体化し
て閉塞されていてもよい。この空孔部を含めた円柱状の
碍子の両端面とリード線の先端とに前もって厚膜銅ペー
ストを塗布し、長さ約30mmの軟銅線からなるリード
線4の先端約2mmを空孔部8に挿入する。そして、中
性雰囲気である窒素雰囲気中で最高温度960℃のコン
ベア式焼成炉にて焼成を行い、リード線付き碍子を得
る。
A method of manufacturing a resistor with lead wire according to an embodiment of the present invention will be described below. First, a cylindrical insulator 1 having a diameter of 2.5 mm and a length of 8.0 mm having holes on both end surfaces is prepared. The hole portion 8 may be a single through hole as shown in the figure, and the hole portion may be closed in the middle of the insulator integrally with the insulator. Thick film copper paste was previously applied to both end surfaces of the cylindrical insulator including the holes and the tip of the lead wire, and the tip of the lead wire 4 made of annealed copper wire having a length of about 30 mm was cut to about 2 mm. Insert in 8. Then, firing is performed in a conveyor type firing furnace having a maximum temperature of 960 ° C. in a nitrogen atmosphere which is a neutral atmosphere to obtain an insulator with a lead wire.

【0013】このリード線付き碍子の表面に、両端の電
極ペースト塗布部と重なるように、厚膜抵抗ペースト
(Ta/TaN系、シート抵抗1kΩ/□)を塗布し、
窒素雰囲気中で最高温度960℃のコンベア式焼成炉に
て焼成を行い、初期抵抗値約3.7kΩの厚膜抵抗皮膜
が形成される。その後、抵抗皮膜2のカッティングを行
い、完成抵抗値である100kΩに調整する。そして、
従来の技術と同様に保護コート5を施し、リード線付き
抵抗器が完成する。
A thick film resistor paste (Ta / TaN system, sheet resistance 1 kΩ / □) was applied to the surface of the insulator with lead wires so as to overlap with the electrode paste application parts at both ends.
Firing is carried out in a nitrogen atmosphere in a conveyor type firing furnace having a maximum temperature of 960 ° C. to form a thick resistance film having an initial resistance value of about 3.7 kΩ. After that, the resistance film 2 is cut to adjust the finished resistance value to 100 kΩ. And
The protective coat 5 is applied in the same manner as the conventional technique, and the resistor with lead wire is completed.

【0014】得られたリード線付き抵抗器のインパルス
耐圧は、5kV以上であり、従来の同サイズ、同抵抗値
のものが3kV以下であったのと比較して大幅に耐高圧
パルス特性が改善されている。なお、得られた抵抗器の
温度係数はマイナス330ppm/℃であった。
The obtained resistor with lead wire has an impulse withstand voltage of 5 kV or more, which is significantly improved in high-voltage pulse resistance characteristics as compared with a conventional resistor having the same size and the same resistance value of 3 kV or less. Has been done. The temperature coefficient of the obtained resistor was −330 ppm / ° C.

【0015】また、抵抗皮膜として、SnO2 系(シー
ト抵抗100kΩ/□)の厚膜抵抗ペーストを用いたも
のは、初期抵抗約230kΩの抵抗皮膜が形成され、抵
抗皮膜のカッティング調整により10メガΩのリード線
付き抵抗器が得られた。このリード線付き抵抗器のイン
パルス耐圧は同様に5kV以上であり、抵抗器温度係数
はマイナス20ppm/℃であった。
In the case of using a SnO 2 type (sheet resistance 100 kΩ / □) thick film resistance paste as the resistance film, a resistance film having an initial resistance of about 230 kΩ is formed, and the resistance film is adjusted to 10 megaΩ by cutting adjustment. A resistor with a lead wire was obtained. Similarly, the withstand voltage of the resistor with lead wire was 5 kV or more, and the temperature coefficient of the resistor was -20 ppm / ° C.

【0016】なお本実施例においてはリード線として無
加工のものを用いたたが、碍子端面の空孔部及びリード
線の先端部の形状を任意に設定することにより、より碍
子とリード線との結合を強固とすることができる。
Although unprocessed lead wires were used in this embodiment, the insulator and lead wires can be made more flexible by setting the shapes of the holes on the end face of the insulator and the tips of the lead wires as desired. The bond of can be strengthened.

【0017】また、厚膜電極ペーストとして銅ペース
ト、厚膜抵抗ペーストとしてTa/TaN系ペースト、
SnO2 系ペーストを用いたが、中性雰囲気で焼成可能
で、且つリード線の軟化温度より低い温度で焼成可能な
ペースト材料であれば、いずれの材料を用いてもよい。
Further, a copper paste is used as a thick film electrode paste, a Ta / TaN-based paste is used as a thick film resistance paste,
Although the SnO 2 based paste was used, any material may be used as long as it is a paste material that can be fired in a neutral atmosphere and can be fired at a temperature lower than the softening temperature of the lead wire.

【0018】更に厚膜抵抗ペーストはシート抵抗値を、
ペーストブレンドにより任意に設定することができるた
め、抵抗皮膜のカッティングと合わせて幅広い抵抗値範
囲を選択することができる。
Further, the thick film resistance paste has a sheet resistance value
Since it can be arbitrarily set by paste blending, a wide resistance value range can be selected in combination with cutting of the resistance film.

【0019】[0019]

【発明の効果】以上に説明したように、本発明のリード
線付き抵抗器は、円柱状碍子の両端面に空孔部を設け、
リード線の先端部を挿入して厚膜電極ペーストにより固
定したものである。したがって、従来の電極(金属)キ
ャップが不要となり、円柱状碍子の両端の電極間の実効
的な長さを長くすることができる。それ故、本発明によ
れば高電圧のインパルスを印加してもスパークが発生し
難い、耐高電圧パルス特性に優れたリード線付き抵抗器
が提供される。
As described above, the resistor with lead wire according to the present invention is provided with holes on both end surfaces of the cylindrical insulator.
The tip of the lead wire is inserted and fixed with a thick film electrode paste. Therefore, the conventional electrode (metal) cap is not needed, and the effective length between the electrodes at both ends of the cylindrical insulator can be increased. Therefore, according to the present invention, it is possible to provide a resistor with a lead wire in which a spark is unlikely to occur even when a high-voltage impulse is applied, and which has excellent high-voltage pulse resistance.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例のリード線付き抵抗器の断面
図。
FIG. 1 is a sectional view of a resistor with a lead wire according to an embodiment of the present invention.

【図2】従来のリード線付き抵抗器の断面図。FIG. 2 is a cross-sectional view of a conventional resistor with lead wire.

【符号の説明】[Explanation of symbols]

1,9 円柱状碍子 2 抵抗皮膜 3 抵抗皮膜のカッティングライン 4 リード線 5 保護コート 6 電極(金属)キャップ 7 リード線固定用厚膜電極 8 空孔部 1,9 Cylindrical insulator 2 Resistive film 3 Resistive film cutting line 4 Lead wire 5 Protective coat 6 Electrode (metal) cap 7 Lead wire fixing thick film electrode 8 Hole

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 円柱状の碍子の表面には抵抗皮膜が形成
され、該円柱状の碍子の両端面には空孔部が設けられ、
該空孔部にはリード線の先端部が挿入され固定されてい
ることを特徴とするリード線付き抵抗器。
1. A resistance film is formed on the surface of a cylindrical insulator, and voids are provided on both end faces of the cylindrical insulator.
A resistor with a lead wire, wherein a tip portion of a lead wire is inserted and fixed in the hole portion.
【請求項2】 前記空孔部と前記リード線の先端部とは
中性雰囲気で焼成可能な厚膜電極ペーストにより固定さ
れていることを特徴とする請求項1記載のリード線付き
抵抗器。
2. The resistor with lead wire according to claim 1, wherein the hole and the tip of the lead wire are fixed by a thick film electrode paste that can be fired in a neutral atmosphere.
【請求項3】 前記抵抗皮膜は、中性雰囲気で焼成可能
な厚膜抵抗ペーストにより形成されていることを特徴と
する請求項1又は2記載のリード線付き抵抗器。
3. The resistor with lead wire according to claim 1, wherein the resistance film is formed of a thick film resistance paste that can be fired in a neutral atmosphere.
【請求項4】 円柱状の碍子の両端面に空孔部が設けら
れた碍子を準備する工程と、リード線の先端と前記碍子
の空孔部とに中性雰囲気で焼成可能な厚膜電極ペースト
を塗布する工程と、該リード線の先端を前記碍子の両端
面の空孔部に挿入して結合後、中性雰囲気により焼成し
リード線付き碍子を得る工程と、前記円柱状の碍子表面
に中性雰囲気で焼成可能な厚膜抵抗ペーストを塗布し、
中性雰囲気により焼成し抵抗皮膜を形成する工程と、抵
抗値調整のための抵抗皮膜のカッティングを行い、その
後保護コートを施す工程とからなることを特徴とするリ
ード線付き抵抗器の製造方法。
4. A step of preparing an insulator in which holes are provided on both end surfaces of a cylindrical insulator, and a thick film electrode capable of firing in a neutral atmosphere at the tip of the lead wire and the holes of the insulator. A step of applying a paste, a step of inserting the tips of the lead wires into holes on both end surfaces of the insulator and bonding, and then firing in a neutral atmosphere to obtain an insulator with a lead wire, and the cylindrical insulator surface Apply a thick film resistor paste that can be fired in a neutral atmosphere to
A method of manufacturing a resistor with a lead wire, comprising: a step of firing to form a resistance film in a neutral atmosphere; a step of cutting the resistance film for adjusting a resistance value; and then a step of applying a protective coat.
JP5117692A 1993-04-21 1993-04-21 Resistor provided with lead wire and its manufacture Pending JPH06310302A (en)

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JP5117692A JPH06310302A (en) 1993-04-21 1993-04-21 Resistor provided with lead wire and its manufacture

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Application Number Priority Date Filing Date Title
JP5117692A JPH06310302A (en) 1993-04-21 1993-04-21 Resistor provided with lead wire and its manufacture

Publications (1)

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JPH06310302A true JPH06310302A (en) 1994-11-04

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JP5117692A Pending JPH06310302A (en) 1993-04-21 1993-04-21 Resistor provided with lead wire and its manufacture

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008057987A1 (en) 2007-11-22 2009-08-27 Koa Corp., Ina Resistance device and method for its manufacture
CN103426574A (en) * 2012-05-23 2013-12-04 桂林五环电器制造有限公司 Dry-type hollow inductance resistor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50349A (en) * 1973-04-04 1975-01-06
JPS62250601A (en) * 1986-04-23 1987-10-31 松下電器産業株式会社 Glaze resistance paste for neutral atomsphere baking
JPH0437001A (en) * 1990-05-31 1992-02-07 Ngk Insulators Ltd Thin film resistor element

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50349A (en) * 1973-04-04 1975-01-06
JPS62250601A (en) * 1986-04-23 1987-10-31 松下電器産業株式会社 Glaze resistance paste for neutral atomsphere baking
JPH0437001A (en) * 1990-05-31 1992-02-07 Ngk Insulators Ltd Thin film resistor element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008057987A1 (en) 2007-11-22 2009-08-27 Koa Corp., Ina Resistance device and method for its manufacture
CN103426574A (en) * 2012-05-23 2013-12-04 桂林五环电器制造有限公司 Dry-type hollow inductance resistor

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