JPS63275102A - Resistance value adjusting method of variable resistor - Google Patents
Resistance value adjusting method of variable resistorInfo
- Publication number
- JPS63275102A JPS63275102A JP62111617A JP11161787A JPS63275102A JP S63275102 A JPS63275102 A JP S63275102A JP 62111617 A JP62111617 A JP 62111617A JP 11161787 A JP11161787 A JP 11161787A JP S63275102 A JPS63275102 A JP S63275102A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- resistance value
- resistor layer
- layer
- resistance
- 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
- 238000000034 method Methods 0.000 title claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 238000007639 printing Methods 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000007650 screen-printing Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000009966 trimming Methods 0.000 description 4
- 238000001723 curing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000013007 heat curing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Adjustable Resistors (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕 ゛
（産業上の利用分野）
本発明は可変抵抗器用抵抗体に関するもので、電気機器
及び車両等に利用されるものである。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a resistor for a variable resistor, and is used in electrical equipment, vehicles, and the like.
（従来の技術）
本発明に係る従来技術としては第３図に示すように基板
１に抵抗体層２を設け、前記抵抗体層の表面を摺動子が
摺動する構造のものがある。(Prior Art) As shown in FIG. 3, the prior art related to the present invention has a structure in which a resistor layer 2 is provided on a substrate 1 and a slider slides on the surface of the resistor layer.
然し車両用の可変抵抗器は使用環境が厳しく、要求され
る回転耐久性も数百万回〜数億回と高いために摺動によ
る抵抗体層の摩滅が多く、これの改良としての関連技術
として、第１図に示すように抵抗体を二層構造とし、し
かも上層の抵抗体５の体積固有抵抗を下層の抵抗体４の
体積固有抵抗の２倍から５００倍にすることにより耐摩
耗性を向上し可変抵抗器の分圧比を安定にするものがあ
る（特願昭６ｌ−１１９６２２）。However, variable resistors for vehicles are used in harsh environments, and the required rotational durability is high, ranging from millions to hundreds of millions of times, so the resistor layer often wears out due to sliding, and related technology has been developed to improve this. As shown in Fig. 1, the resistor has a two-layer structure, and the volume resistivity of the upper layer resistor 5 is made 2 to 500 times that of the lower layer resistor 4, thereby improving wear resistance. There is a method that improves the voltage division ratio of a variable resistor and stabilizes it (Japanese Patent Application No. 61-119622).
（発明が解決しようとする問題点）
一般に抵抗体の抵抗値は、膜の巾、長さ、厚み及び抵抗
材料の体積固有抵抗によって変化し、スクリーン印刷法
で抵抗体を形成する場合には、印刷条件によって印刷膜
厚は微妙に変化し、抵抗体の焼成あるいは熱硬化条件に
よって体積固有抵抗は大きく変化し易く、実際の製造工
程に於いては多くの要因が複雑にからみあって抵抗体の
抵抗値は約±２０％のバラツキがある。(Problems to be Solved by the Invention) Generally, the resistance value of a resistor changes depending on the width, length, and thickness of the film and the volume resistivity of the resistive material. The printed film thickness changes slightly depending on the printing conditions, and the volume resistivity tends to change greatly depending on the firing or thermosetting conditions of the resistor.In the actual manufacturing process, many factors are intricately intertwined, and the resistance of the resistor changes. The values vary by about ±20%.
また前記二層構造の抵抗体の全抵抗は、下層抵抗体の抵
抗値と上層抵抗体の抵抗値の並列合成抵抗であり、製造
工程における全抵抗のバラツキは、下層抵抗体の抵抗値
のバラツキと上層抵抗体のバラツキの二乗和の平方根と
なり、一層のみの抵抗体からなる可変抵抗器の抵抗値の
バラツキに比較して大きくなるという問題点がある。Furthermore, the total resistance of the two-layer resistor is a parallel composite resistance of the resistance value of the lower layer resistor and the resistance value of the upper layer resistor, and the variation in the total resistance during the manufacturing process is due to the variation in the resistance value of the lower layer resistor. This is the square root of the sum of the squares of the variations in the upper layer resistor, and there is a problem that the variation in resistance value is larger than that of a variable resistor made of only one layer of resistors.
本発明は第１の抵抗体層の上に、抵抗体層の体積固有抵
抗の２倍から５００倍の体積固有抵抗をもつ第２の抵抗
体層を有する可変抵抗器に於いて、全抵抗値のバラツキ
を小さくする製造方法を技術的課題とするものである。The present invention provides a variable resistor having a second resistor layer on a first resistor layer having a volume resistivity of 2 to 500 times the volume resistivity of the resistor layer. The technical challenge is to find a manufacturing method that reduces the variation in
（問題点を解決するための手段）
前記技術的課題を解決するために講じた技術的手段は次
のとおりである。すなわち、基板の平面上に第１の抵抗
体層を設け、前記抵抗体層の上に抵抗体層の体積固有抵
抗の２倍から５００倍の体積固有抵抗を有する第２の抵
抗体層を設けた可変抵抗器の抵抗体の製造方法に於いて
、第１の抵抗体層を形成後、前記抵抗体層の抵抗値を測
定し、前記抵抗値と工程上の設定値を比較して第２の抵
抗体層を形成する場合に抵抗材料、製造条件を変化させ
て全抵抗値の製造上のバラツキを小さくする可変抵抗器
の抵抗値調整方法で、前記第２の抵抗体層に使用するカ
ーボンペーストのカーボン含有率を変化させるとか、第
２の抵抗体層に使用するカーボンペーストをスクリーン
印刷する場合に、印圧、スキージ−スピード、スクリー
ンメツシュ数等の印刷条件を変化させて印刷膜厚を変化
させるか、第２抵抗体層に使用するカーボンペーストを
熱硬化する時に硬化温度、硬化時間を変化させる、可変
抵抗器の抵抗体調整方法である。(Means for solving the problems) The technical measures taken to solve the above technical problems are as follows. That is, a first resistor layer is provided on the plane of the substrate, and a second resistor layer having a volume resistivity of 2 to 500 times the volume resistivity of the resistor layer is provided on the resistor layer. In a method for manufacturing a resistor of a variable resistor, after forming a first resistor layer, the resistance value of the resistor layer is measured, and the resistance value is compared with a set value in the process to determine a second resistor layer. A method for adjusting the resistance value of a variable resistor in which the resistor material and manufacturing conditions are changed to reduce manufacturing variations in the total resistance value when forming the second resistor layer. When changing the carbon content of the paste or screen printing the carbon paste used for the second resistor layer, the printing film thickness can be adjusted by changing printing conditions such as printing pressure, squeegee speed, and number of screen meshes. This is a resistor adjustment method for a variable resistor, in which the curing temperature and curing time are changed when the carbon paste used for the second resistor layer is thermally cured.
（作用）
前記技術的手段は次のように作用する。すなわち、二層
構造の可変抵抗器の抵抗体の製造方法に於いて、第１の
抵抗体層である下層抵抗体の抵抗値を測定し、第２の抵
抗体層である上層抵抗体のシート抵抗を調整するために
全抵抗値のバラツキが極めて少なくなるものである。(Operation) The technical means operates as follows. That is, in a method for manufacturing a resistor of a two-layer variable resistor, the resistance value of the lower layer resistor, which is the first resistor layer, is measured, and the resistance value of the lower layer resistor, which is the first resistor layer, is measured, and the sheet of the upper layer resistor, which is the second resistor layer, is measured. Since the resistance is adjusted, the variation in the total resistance value is extremely reduced.
（実施例） 以下実施例について説明する。(Example) Examples will be described below.
第１図は二層構造の可変抵抗器用の抵抗体で、銅箔が必
要とするパターン形状にエツチングされたガラスエポキ
シ基板１に銀ペースト（アサヒ化学（製）ＬＳ−５０４
Ｊ）３をスクリーン印刷し、１７０℃の恒温槽で３０分
熱硬化させる。その後下層抵抗体４として、シート抵抗
呼称３５０Ω／口のカーボンペーストをスクリーン印刷
し、１７０℃の恒温槽で６０分熱硬化させる。Figure 1 shows a resistor for a variable resistor with a two-layer structure.A glass epoxy substrate 1 with copper foil etched into the required pattern is covered with silver paste (Asahi Chemical Co., Ltd.) LS-504.
J) 3 was screen printed and heat cured in a constant temperature bath at 170°C for 30 minutes. Thereafter, a carbon paste having a nominal sheet resistance of 350 Ω/hole was screen printed as the lower resistor 4, and was thermally cured in a thermostatic oven at 170° C. for 60 minutes.
下層抵抗体４の長さと巾の比は、１７であるので理論的
には３５０ΩＸ１７＝５９５０Ωの抵抗が得られるはず
だが、実際の製造工程では膜厚の不均一、材料の不均一
、熱硬化工程の条件の不均一で得られる下層抵抗体の抵
抗値は製造のロット毎に、あるいは製品１つ１つのバラ
ツキにより、おおよそ５０００Ωから７０００Ωの範囲
内で分布する。The length-to-width ratio of the lower resistor 4 is 17, so theoretically a resistance of 350Ω x 17 = 5950Ω should be obtained, but in the actual manufacturing process, there are problems such as uneven film thickness, uneven material, and heat curing process. The resistance value of the lower layer resistor obtained under non-uniform conditions is distributed within the range of approximately 5000Ω to 7000Ω due to variations in each manufacturing lot or each product.
次に上層抵抗体５として、シート抵抗呼称３にΩ／口の
カーボンペーストをスクリーン印刷し、１７０℃の恒温
槽で６０分間熱硬化させる。上層抵抗体４の長さと巾の
比は１０であるので、理論的には３３に０７口Ｘ１０＝
３０にΩの抵抗が形成されるので下層と上層の抵抗体の
並列合成抵抗（全抵抗）は５９５０ｘ３ｘｌＯ’ ／
（５９５０＋３Ｘ１０’ ）＝４９６５Ωとなるはずで
あるが、下層抵抗体の抵抗値が５０００Ωから７０００
Ωまでばらついているので、実際には上・下層の全抵抗
値は４１００Ωから５８００Ωまでばらついてしまう。Next, as the upper layer resistor 5, a carbon paste of Ω/hole is screen printed on the sheet resistance designation 3, and is thermally cured in a constant temperature bath at 170° C. for 60 minutes. Since the length and width ratio of the upper resistor 4 is 10, theoretically 33.07 ports x 10=
Since a resistance of Ω is formed at 30, the parallel combined resistance (total resistance) of the lower and upper layer resistors is 5950x3xlO'/
(5950+3X10') = 4965Ω, but the resistance value of the lower layer resistor is 5000Ω to 7000Ω.
Since it varies up to Ω, the total resistance value of the upper and lower layers actually varies from 4100Ω to 5800Ω.
次に本発明による実施例について説明する。Next, embodiments according to the present invention will be described.
前記従来の製造方法で下層抵抗体を印刷し、熱硬化後、
下層抵抗体の抵抗値を測定し、５０００〜５５００Ω、
５５００〜６０００Ω、６５００〜７０００Ω、の４つ
のグループに分け、それぞれをＡ、Ｂ、Ｃ，Ｄと区分け
する。After printing the lower layer resistor using the conventional manufacturing method and heat curing,
Measure the resistance value of the lower layer resistor, 5000-5500Ω,
It is divided into four groups: 5500-6000Ω, 6500-7000Ω, and each group is divided into A, B, C, and D.
次に上層抵抗体を印刷する時、前記各グループ毎に上層
抵抗体のカーボンペーストのシート抵抗を第１表のよう
に選択する。その後従来と同様にスクリーン印刷、熱硬
化を行うものである。できた二層構造抵抗体の抵抗値を
測定すると第１表のようになり４７００〜５３００Ωの
ばらつきとなった。Next, when printing the upper layer resistor, the sheet resistance of the carbon paste of the upper layer resistor is selected for each group as shown in Table 1. Thereafter, screen printing and heat curing are performed in the same manner as in the past. When the resistance values of the resulting two-layer resistor were measured, they were as shown in Table 1, with a variation of 4,700 to 5,300 Ω.
第１表
このように従来４１００〜５８００Ωと大きくばらつい
ていた全抵抗値を４７００〜５３００Ωと分布の巾を１
／３近くに減少させることができた。Table 1 In this way, the total resistance value, which conventionally varied widely from 4100 to 5800 Ω, was changed to 4700 to 5300 Ω, and the width of the distribution was reduced to 1.
We were able to reduce it to nearly /3.
上層抵抗を印刷、硬化する時にも製造工程の種々のばら
つきによって上層抵抗の抵抗値にもばらつきは発生する
。しかし前記の様に上層抵抗体の抵抗値は、下層抵抗体
の抵抗値の約１０倍前後で実施されているので上層抵抗
体のばらつきは殆ど無視することができるものである。Even when printing and curing the upper layer resistor, variations in the resistance value of the upper layer resistor occur due to various variations in the manufacturing process. However, as mentioned above, since the resistance value of the upper layer resistor is approximately 10 times the resistance value of the lower layer resistor, the variation in the upper layer resistor can be almost ignored.
本発明は次のような効果を有する。すなわち、抵抗体の
一部分をアルミナ粉末を吹きつけて削り取り、抵抗値を
一定の値に調整するいわゆるサンドブラストトリミング
法、あるいはレーザービームで抵抗体の一部分を蒸発さ
せて抵抗値を一定の値に調整するいわゆるレーザートリ
ミング法などの手法も考えられるが、これらの方法はで
きあがった抵抗体の抵抗値を非常に狭い範囲に調整でき
るが、抵抗体の一部分を傷つけているので、微小なりラ
ックや膜厚の薄い部分が存在し、抵抗値の安定性を損う
。更に膜抵抗の一部を削り取っているので許容発熱量が
制限されるものである。The present invention has the following effects. In other words, the so-called sandblast trimming method involves spraying alumina powder on a portion of the resistor to trim it off and adjust the resistance to a constant value, or the method involves evaporating a portion of the resistor with a laser beam to adjust the resistance to a constant value. Methods such as the so-called laser trimming method can also be considered, but these methods can adjust the resistance value of the completed resistor within a very narrow range, but since they damage a part of the resistor, it may cause slight damage to the rack or film thickness. There is a thin part, which impairs the stability of the resistance value. Furthermore, since part of the film resistance is removed, the allowable amount of heat generation is limited.
又前記のサンドブラストトリミング、レーザートリミン
グは製品１個１個に実施しなければ効果は無いが、本発
明の方法によればロット生産におけるロフト毎の製造条
件を変えるだけで大きな効果を得ることができる。Furthermore, the sandblasting trimming and laser trimming described above are not effective unless they are applied to each product, but according to the method of the present invention, great effects can be obtained by simply changing the manufacturing conditions for each loft in lot production. .
第１図は本実施例の断面図、第２図は抵抗体の配線図、
第３図は従来例の断面図である。
ｌ・・・基板、４・・・第１抵抗体層。
５・・・第２抵抗体層
第２Ｆ１
１３ｇFigure 1 is a cross-sectional view of this embodiment, Figure 2 is a wiring diagram of the resistor,
FIG. 3 is a sectional view of a conventional example. l... Substrate, 4... First resistor layer. 5... Second resistor layer 2nd F1 13g
Claims (4)
け、該抵抗体層の上に抵抗体層の体積固有抵抗の２倍か
ら５００倍の体積固有抵抗を有する第２の抵抗体層を設
けた可変抵抗器の抵抗体の製造方法に於いて、第１の抵
抗体層を形成後、該抵抗体層の抵抗値を測定し、前記抵
抗値と、工程上の設定値とを比較して第２の抵抗体層を
形成する場合に、抵抗材料、製造条件を変化させて全抵
抗値の製造上のバラツキを小さく可変抵抗器の抵抗値調
整方法。(1) A first resistor layer is provided on at least one plane of the substrate, and a second resistor layer is provided on the resistor layer, and the second resistor layer has a volume resistivity of 2 to 500 times the volume resistivity of the resistor layer. In a method for manufacturing a resistor of a variable resistor provided with layers, after forming a first resistor layer, the resistance value of the resistor layer is measured, and the resistance value and a set value in the process are calculated. A method of adjusting the resistance value of a variable resistor by changing the resistance material and manufacturing conditions to reduce manufacturing variations in the total resistance value when forming a second resistor layer.
のカーボン含有率を変化させることにより、前記第２の
抵抗体層の抵抗値を変化させる、特許請求の範囲第１項
記載の可変抵抗器の抵抗値調整方法。(2) The variable resistor according to claim 1, wherein the resistance value of the second resistor layer is changed by changing the carbon content of the carbon paste used for the second resistor layer. How to adjust the resistance value of the device.
をスクリーン印刷する場合に、印圧、スキージ−スピー
ド、スクリーンメッシュ数の印刷条件を変化させて印刷
膜厚を変化させることにより第２の抵抗体層の抵抗値を
変化させる、特許請求の範囲第１項記載の可変抵抗器の
抵抗値調整方法。(3) When screen printing the carbon paste used for the second resistor layer, the printing thickness can be changed by changing the printing conditions such as printing pressure, squeegee speed, and number of screen meshes. The method of adjusting the resistance value of a variable resistor according to claim 1, wherein the resistance value of the resistor layer is changed.
を熱硬化する時に、硬化温度、硬化時間を変化させるこ
とにより、第２の抵抗体層の抵抗値を変化させる特許請
求の範囲第１項記載の可変抵抗器の抵抗値調整方法。(4) The resistance value of the second resistor layer is changed by changing the curing temperature and curing time when the carbon paste used for the second resistor layer is thermally cured. How to adjust the resistance value of the variable resistor described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62111617A JPS63275102A (en) | 1987-05-07 | 1987-05-07 | Resistance value adjusting method of variable resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62111617A JPS63275102A (en) | 1987-05-07 | 1987-05-07 | Resistance value adjusting method of variable resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63275102A true JPS63275102A (en) | 1988-11-11 |
Family
ID=14565865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62111617A Pending JPS63275102A (en) | 1987-05-07 | 1987-05-07 | Resistance value adjusting method of variable resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63275102A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0362502A (en) * | 1989-07-29 | 1991-03-18 | Ibiden Co Ltd | Manufacture of organic thick film resistor |
| JP2006237234A (en) * | 2005-02-24 | 2006-09-07 | Murata Mfg Co Ltd | Multilayer composite electronic components |
-
1987
- 1987-05-07 JP JP62111617A patent/JPS63275102A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0362502A (en) * | 1989-07-29 | 1991-03-18 | Ibiden Co Ltd | Manufacture of organic thick film resistor |
| JP2006237234A (en) * | 2005-02-24 | 2006-09-07 | Murata Mfg Co Ltd | Multilayer composite electronic components |
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