JP2772044B2 - Resistance paste - Google Patents
Resistance pasteInfo
- Publication number
- JP2772044B2 JP2772044B2 JP1173302A JP17330289A JP2772044B2 JP 2772044 B2 JP2772044 B2 JP 2772044B2 JP 1173302 A JP1173302 A JP 1173302A JP 17330289 A JP17330289 A JP 17330289A JP 2772044 B2 JP2772044 B2 JP 2772044B2
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- parts
- glassy carbon
- paste
- spherical glassy
- 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
- 229910021397 glassy carbon Inorganic materials 0.000 claims description 24
- 239000005011 phenolic resin Substances 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000007822 coupling agent Substances 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 4
- 229920001568 phenolic resin Polymers 0.000 claims description 4
- 239000012298 atmosphere Substances 0.000 claims description 3
- 238000010000 carbonizing Methods 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 239000006229 carbon black Substances 0.000 description 10
- 229910002804 graphite Inorganic materials 0.000 description 9
- 239000010439 graphite Substances 0.000 description 9
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 description 7
- 239000002518 antifoaming agent Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Apparatuses And Processes For Manufacturing Resistors (AREA)
- Non-Adjustable Resistors (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Adjustable Resistors (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は可変抵抗器用の抵抗素子となる抵抗ペースト
に関する。Description: TECHNICAL FIELD The present invention relates to a resistive paste that serves as a resistive element for a variable resistor.
従来、可変抵抗器用の抵抗素子は、フェノール樹脂或
いはエポキシ樹脂などの熱硬化性樹脂の樹脂バインダー
中にカーボンブラックやグラファイトなどの導電性粒子
を混練してペースト化し、このペースト化した抵抗ペー
ストを絶縁基板の表面にスプレーや印刷によって皮膜状
に付着し、これを加熱硬化して抵抗体とし、この抵抗膜
上にノイズ低減のためのグリースを塗布したものが一般
的である。Conventionally, a resistor element for a variable resistor is formed by kneading conductive particles such as carbon black or graphite into a resin binder of a thermosetting resin such as phenolic resin or epoxy resin and forming a paste. Generally, a film is attached to the surface of the substrate by spraying or printing, and this is heated and cured to form a resistor, and grease for reducing noise is applied on the resistor film.
しかしながら抵抗素子上には、金属製（例えば、リン
青銅、ベリリウム銅を素材としたもの）の刷子が接触す
ると共に摺動するので、表面硬度の異なる物質同志の摩
擦による摩耗とグリースによる抵抗膜の化学変化に伴な
う摩耗とが相まって、抵抗膜が削り取られ基板面の露出
に至るという問題点があった。特にカーボン量の少ない
高抵抗ペーストを用いた抵抗素子ではその摩擦度合が激
しく、且つ湿度による抵抗値変化率が大きいという問題
点があった。However, a metal (for example, phosphor bronze or beryllium copper) brush contacts and slides on the resistive element, so that abrasion due to friction between materials having different surface hardness and the resistive film due to grease are formed. There is a problem in that the resistive film is scraped off and exposed to the substrate surface in combination with the wear accompanying the chemical change. In particular, a resistance element using a high resistance paste having a small amount of carbon has a problem that the degree of friction is severe and the rate of change in resistance value due to humidity is large.
そこで本発明は前記事情に基づいてなされたものであ
り、金属刷子との摺動に対して耐摩耗性に優れ、しかも
耐湿特性が良好である抵抗素子を得ることができる抵抗
ペーストを提供することを目的とする。Therefore, the present invention has been made based on the above circumstances, and provides a resistance paste capable of obtaining a resistance element having excellent abrasion resistance against sliding with a metal brush and excellent moisture resistance. With the goal.
上記目的を達成するために本発明の抵抗ペーストは、
樹脂バインダー中に導電性材料を付与すると共にフェノ
ール系樹脂を還元雰囲気中において高温で炭化焼成して
得た球形ガラス状カーボンを添加することによって構成
されている。また、前記球形ガラス状カーボンがカップ
リング剤にて処理されたものであってもよい。In order to achieve the above object, the resistance paste of the present invention comprises:
It is constituted by providing a conductive material in a resin binder and adding spherical glassy carbon obtained by carbonizing and firing a phenolic resin at a high temperature in a reducing atmosphere. Further, the spherical glassy carbon may be treated with a coupling agent.
本発明による抵抗ペーストは、球形ガラス状カーボン
が添加されているので、これを摺動用の可変抵抗器の抵
抗素子に使用すれば、該抵抗素子の皮膜中に潤滑性と耐
摩擦性並びに耐湿性が付与される。また、球形ガラス状
カーボンをカップリング剤で処理しておけば、バインダ
ー樹脂との濡れ性が良好になって一段と向上した耐湿性
が付与される。Since the resistance paste according to the present invention has spherical glassy carbon added thereto, if this is used for the resistance element of a variable resistor for sliding, the lubricating property, the friction resistance and the moisture resistance are contained in the film of the resistance element. Is given. Further, if the spherical glassy carbon is treated with a coupling agent, the wettability with the binder resin is improved, and further improved moisture resistance is provided.
なお、本発明による抵抗ペーストは、その含有する球
形ガラス状カーボンが10-3Ω・cm程度の体積固有抵抗を
有しながらカーボンブラックのようなストラクチャーが
ないため、バインダー樹脂中に均一に分散することによ
って、充填密度の高い高抵抗用のペーストとなってい
る。Note that the resistance paste according to the present invention has a volume-specific resistance of about 10 −3 Ω · cm while the spherical vitreous carbon contained therein does not have a structure like carbon black, and thus is uniformly dispersed in the binder resin. As a result, a paste for high resistance with a high packing density is obtained.
以下、本発明の実施例について説明する。まず、本発
明における抵抗ペーストを得るには、次の材料を用意す
る。すなわち、バインダー樹脂としてフェノール樹脂な
どの熱硬化性樹脂を143部、導電性材料としてカーボン
ブラックやグラファイトを23〜51部、溶剤としてイソプ
ロピルアルコールやブチルカルビトールを55〜95部、他
に消泡剤１〜６部をそれぞれ用意し、さらに、球形のフ
ェノール系樹脂を還元雰囲気中で炭化焼成して得た球形
ガラス状カーボンを１〜50部を準備する。Hereinafter, examples of the present invention will be described. First, in order to obtain the resistance paste according to the present invention, the following materials are prepared. That is, 143 parts of a thermosetting resin such as a phenol resin as a binder resin, 23 to 51 parts of carbon black or graphite as a conductive material, 55 to 95 parts of isopropyl alcohol or butyl carbitol as a solvent, and an antifoaming agent. 1 to 6 parts are prepared, and 1 to 50 parts of spherical glassy carbon obtained by carbonizing and firing a spherical phenolic resin in a reducing atmosphere are prepared.
上記材料の各配合割合を変え、実施例１〜５に示す各
抵抗ペーストを得た。The resistance pastes shown in Examples 1 to 5 were obtained by changing the mixing ratios of the above materials.
（実施例１） フェノール樹脂143部、カーボンブラック20部、グラ
ファイト８部、球形ガラス状カーボン２部、イソプロピ
ルアルコール32部及び消泡剤５部をそれぞれ混合し攪拌
した後、三本ロールミルで混練し、さらにブチルカルビ
トールにて粘度調整を行なって、2.9kΩ／□の抵抗ペー
ストを得た。(Example 1) 143 parts of phenol resin, 20 parts of carbon black, 8 parts of graphite, 2 parts of spherical glassy carbon, 32 parts of isopropyl alcohol and 5 parts of an antifoaming agent were mixed and stirred, and then kneaded with a three-roll mill. Then, the viscosity was adjusted with butyl carbitol to obtain a resistance paste of 2.9 kΩ / □.
（実施例２） フェノール樹脂143部、カーボンブラック18部、グラ
ファイト８部、球形ガラス状カーボン10部、イソプロピ
ルアルコール32部及び消泡剤２部をそれぞれ混合し攪拌
した後、三本ロールミルで混練し、さらにブチルカルビ
トールにて粘度調整を行なって、2.5kΩ／□の抵抗ペー
ストを得た。(Example 2) 143 parts of phenol resin, 18 parts of carbon black, 8 parts of graphite, 10 parts of spherical glassy carbon, 32 parts of isopropyl alcohol, and 2 parts of an antifoaming agent were mixed and stirred, and then kneaded with a three-roll mill. Then, the viscosity was adjusted with butyl carbitol to obtain a 2.5 kΩ / □ resistance paste.
（実施例３） フェノール樹脂143部、カーボンブラック18部、グラ
ファイト８部、球形ガラス状カーボン20部、イソプロピ
ルアルコール30部及び消泡剤３部をそれぞれ混合し攪拌
した後、三本ロールミルで混練し、さらにブチルカルビ
トールにて粘度調整を行なって、1.5kΩ／□の抵抗ペー
ストを得た。(Example 3) 143 parts of phenol resin, 18 parts of carbon black, 8 parts of graphite, 20 parts of spherical glassy carbon, 30 parts of isopropyl alcohol and 3 parts of an antifoaming agent were mixed and stirred, and then kneaded with a three-roll mill. Then, the viscosity was adjusted with butyl carbitol to obtain a resistance paste of 1.5 kΩ / □.
（実施例４） フェノール樹脂143部、カーボンブラック18部、グラ
ファイト８部、カップリング剤処理した球形ガラス状カ
ーボン15部、イソプロピルアルコール30部及び消泡剤10
部をそれぞれ混合し攪拌した後、三本ロールミルで混練
し、さらにブチルカルビトールにて粘度調整を行なっ
て、2.5kΩ／□の抵抗ペーストを得た。(Example 4) Phenol resin (143 parts), carbon black (18 parts), graphite (8 parts), spherical glassy carbon treated with a coupling agent (15 parts), isopropyl alcohol (30 parts), and defoamer (10)
After mixing and stirring each part, the mixture was kneaded with a three-roll mill, and the viscosity was adjusted with butyl carbitol to obtain a 2.5 kΩ / □ resistance paste.
（実施例５） フェノール樹脂143部、カーボンブラック18部、グラ
ファイト８部、カップリング剤処理した球形ガラス状カ
ーボン20部、イソプロピルアルコール30部及び消泡剤20
部をそれぞれ混合し攪拌した後、三本ロールミルで混練
し、さらにブチルカルビトールにて粘度調整を行なっ
て、1.5kΩ／□の抵抗ペーストを得た。(Example 5) 143 parts of phenol resin, 18 parts of carbon black, 8 parts of graphite, 20 parts of spherical glassy carbon treated with a coupling agent, 30 parts of isopropyl alcohol, and 20 parts of antifoaming agent
After mixing and stirring the respective parts, the mixture was kneaded with a three-roll mill, and the viscosity was adjusted with butyl carbitol to obtain a resistance paste of 1.5 kΩ / □.
上記各実施例１〜５で得た各抵抗ペーストをそれぞれ
スクリーン印刷機によって、第１図及び第２図に示すニ
ッケルメッキした電極２を形成した基板１上に印刷し、
150℃の温度で60分間加熱して硬化させ、金属刷子４が
摺動する膜厚15〜20μｍの抵抗素子３を形成した。Each of the resistor pastes obtained in each of Examples 1 to 5 is printed on a substrate 1 on which a nickel-plated electrode 2 shown in FIGS. 1 and 2 is formed by a screen printer, respectively.
The resistive element 3 was heated and cured at a temperature of 150 ° C. for 60 minutes to form a resistive element 3 having a film thickness of 15 to 20 μm on which the metal brush 4 slides.
このようにして形成した抵抗素子３における摺動回数
と耐摩耗性及び抵抗値変化並びに耐湿特性を、従来の抵
抗素子のそれと比較しながら、以下の方法によって試験
を行ない、その結果を第３図乃至第５図のグラフに示し
た。A test was performed by the following method while comparing the number of times of sliding, abrasion resistance, change in resistance value, and humidity resistance of the resistance element 3 thus formed with that of the conventional resistance element, and the results were shown in FIG. 5 to FIG.
尚、各実施例に基づいて形成した抵抗素子３と比べる
比較例は、フェノール樹脂143部、カーボンブラック20
部、グラファイト10部、イソプロピルアルコール30部及
び消泡剤５部を混合し攪拌した後、三本ロールミルで混
練し、さらにブチルカルビトールにて粘度調整を行なっ
て得た2.5kΩ／□の抵抗ペーストを、前記と同様の処理
によってニッケルメッキによる電極を形成した基板上に
印刷すると共に硬化させた膜厚15〜20μｍの従来の抵抗
素子である。In addition, a comparative example in which the resistance element 3 formed based on each example is compared with 143 parts of phenol resin and carbon black 20
Parts, 10 parts of graphite, 30 parts of isopropyl alcohol and 5 parts of an antifoaming agent were mixed and stirred, then kneaded with a three-roll mill, and further adjusted in viscosity with butyl carbitol to obtain a 2.5 kΩ / □ resistance paste. Is a conventional resistance element having a thickness of 15 to 20 μm, which is printed and cured on a substrate on which an electrode formed by nickel plating is formed by the same treatment as described above.
第３図及び第４図の各グラフに示す試験については、
摺動刷子としてリン青銅を使用し、刷子圧50g/mm2、摺
動スピード15mm/sにて行なった。その結果、第３図に示
すように、球形ガラス状カーボンを添加した各実施例の
ものは、これを添加していない比較例のものに比べて、
刷子による摺動回数との関係で摩耗の深さが遥かに小さ
いことが判る。すなわち、比較例のものは、20万サイク
ル摺動後に抵抗素子が完全に削り取られたのに対して、
各実施例のものは、100万サイクル摺動後でも３〜11μ
ｍ程度しか摩耗していない。特に球形ガラス状カーボン
を多く添加したもの程、摩耗の程度が概ね少ない。For the tests shown in the graphs of FIGS. 3 and 4,
Using phosphor bronze as the sliding brush, the brushing was performed at a brush pressure of 50 g / mm 2 and a sliding speed of 15 mm / s. As a result, as shown in FIG. 3, each of the examples in which the spherical glassy carbon was added, was compared with the comparative example in which it was not added.
It can be seen that the depth of wear is much smaller in relation to the number of times of sliding by the brush. In other words, in the comparative example, the resistance element was completely removed after 200,000 cycles of sliding,
In each example, 3 to 11μ even after sliding for 1 million cycles
Only about m is worn. In particular, the more the spherical glassy carbon is added, the less the degree of wear is generally reduced.
また、第４図に示すように、刷子による摺動回数と抵
抗値変化率の関係を比較したグラフからは、球形ガラス
状カーボンを添加した各実施例のものは、これを添加し
ていない比較例に比べて抵抗値の変化率が小さいことが
判かる。各実施例の比較においても、球形ガラス状カー
ボンが多く添加しているもの程、抵抗値の変化が概ね小
さい。Further, as shown in FIG. 4, from the graph comparing the relationship between the number of times of sliding by the brush and the rate of change in the resistance value, it can be seen from the graphs in each of the examples to which spherical glassy carbon was added that there was no addition. It can be seen that the rate of change of the resistance value is smaller than the example. Also in the comparison between the examples, the change in the resistance value is generally smaller as the amount of the spherical glassy carbon added is larger.
さらに第５図のグラフに示す試験については、60℃で
90〜95％RHの恒温槽中に放置し、所定の時間間隔で取り
出した後の抵抗値変化の測定を行なった。その結果、球
形ガラス状カーボンを添加した各実施例のものは、これ
を添加していない比較例のものに比べて、経過時間との
関係で抵抗値の変化が小さいことが判かる。特に、カッ
プリング剤処理をした球形ガラス状カーボンを使用した
ものは、比較例に比べて５〜７％程度も抵抗値の変化率
が小さくなっている。Further, for the test shown in the graph of FIG.
The sample was left in a constant temperature bath of 90 to 95% RH and taken out at predetermined time intervals to measure a change in resistance value. As a result, it can be seen that the change in the resistance value of each of the examples in which spherical glassy carbon was added was smaller than that of the comparative example in which spherical glassy carbon was not added in relation to the elapsed time. In particular, in the case of using spherical glassy carbon treated with a coupling agent, the rate of change of the resistance value is about 5 to 7% smaller than that of the comparative example.
以上説明したように本発明による抵抗ペーストは、こ
れを可変抵抗器の抵抗素子に使用すれば、次に記載する
ような効果を奏する。As described above, the resistor paste according to the present invention has the following effects when it is used for a resistance element of a variable resistor.
すなわち、球形ガラス状カーボンを添加することによ
って、抵抗素子に潤滑性と耐摩擦性が付与され、金属刷
子による摺動に対して耐摩耗性能が飛躍的に向上すると
共に、抵抗値の変化率が少なく電気的性能が安定してお
り、摺動用抵抗器の寿命を大幅に改善することができ
る。また、球形ガラス状カーボンを含有する本発明によ
る抵抗ペーストは、抵抗素子の耐湿特性を向上させ、抵
抗器における電気的特性の長期間にわたる維持に貢献す
ることができる。特に、球形ガラス状カーボンをカップ
リング剤で処理しておけば、抵抗素子の耐湿特性が一段
と向上する。In other words, by adding spherical glassy carbon, lubricating properties and friction resistance are imparted to the resistance element, the wear resistance performance against sliding by a metal brush is dramatically improved, and the rate of change of the resistance value is reduced. The electrical performance is small and stable, and the life of the sliding resistor can be greatly improved. Further, the resistance paste according to the present invention containing spherical glassy carbon can improve the moisture resistance characteristics of the resistance element and contribute to maintaining the electrical characteristics of the resistor for a long period of time. In particular, if the spherical glassy carbon is treated with a coupling agent, the moisture resistance of the resistance element is further improved.
なお、本発明品に含有している球形ガラス状カーボン
は、体積固有抵抗が10-3Ω・cmと通常のカーボンブラッ
クやグラファイトに比べて大差がないにもかかわらずス
トラクチャーがないため、同量のボリュームを配合して
も抵抗ペーストの比抵抗値が下がらず、従って摺動性が
良好であると共に、比抵抗の高い抵抗ペーストを得るこ
とが可能となる。The spherical glassy carbon contained in the product of the present invention has a volume resistivity of 10 -3 Ωcm, which is not much different from that of ordinary carbon black or graphite. Even if the volume is blended, the specific resistance value of the resistance paste does not decrease, so that it is possible to obtain a resistance paste having good slidability and high specific resistance.
第１図は本発明の抵抗ペーストを使用して基板上に抵抗
素子を形成した一例を示す斜視図、第２図はその断面
図、第３図は抵抗素子における摺動回数と摩耗の深さと
の関係を比較したグラフ、第４図は同じく摺動回数と抵
抗値変化率との関係を比較したグラフ、第５図は耐湿試
験結果を示したグラフである。FIG. 1 is a perspective view showing an example of forming a resistive element on a substrate using the resistive paste of the present invention, FIG. 2 is a cross-sectional view thereof, and FIG. , FIG. 4 is a graph comparing the relationship between the number of times of sliding and the rate of change in resistance value, and FIG. 5 is a graph showing the results of a moisture resistance test.
フロントページの続き (56)参考文献 特開 昭63−207101（ＪＰ，Ａ) 特開 昭61−48903（ＪＰ，Ａ) 特開 昭62−266805（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H01C 7/00,10/00 - 10/50 H01C 17/00 - 17/30Continuation of front page (56) References JP-A-63-207101 (JP, A) JP-A-61-48903 (JP, A) JP-A-62-266805 (JP, A) (58) Fields investigated (Int) .Cl. 6 , DB name) H01C 7 / 00,10 / 00-10/50 H01C 17/00-17/30
Claims (2)
と共に、フェノール系樹脂を還元雰囲気中において高温
で炭化焼成した球形ガラス状カーボンを添加してペース
ト化したことを特徴とする抵抗ペースト1. A resistive paste characterized by adding a conductive material to a resin binder and adding a spherical glassy carbon obtained by carbonizing and firing a phenolic resin at a high temperature in a reducing atmosphere to form a paste.
剤にて処理してあることを特徴とする請求項１記載の抵
抗ペースト2. The resistance paste according to claim 1, wherein said spherical glassy carbon has been treated with a coupling agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1173302A JP2772044B2 (en) | 1989-07-05 | 1989-07-05 | Resistance paste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1173302A JP2772044B2 (en) | 1989-07-05 | 1989-07-05 | Resistance paste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0338004A JPH0338004A (en) | 1991-02-19 |
| JP2772044B2 true JP2772044B2 (en) | 1998-07-02 |
Family
ID=15957927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1173302A Expired - Fee Related JP2772044B2 (en) | 1989-07-05 | 1989-07-05 | Resistance paste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2772044B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6500361B1 (en) | 1999-08-02 | 2002-12-31 | Alps Electric Co., Ltd. | Conductive resin composition and encoder switch using the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19714561C1 (en) * | 1997-04-09 | 1998-10-22 | Preh Elektro Feinmechanik | Process for the production of powdery, glassy carbon, resistance paste with this carbon and use of this resistance paste as a resistance layer |
| WO2010093035A1 (en) * | 2009-02-16 | 2010-08-19 | 株式会社村田製作所 | Conductive resin composition, process for producing electronic part using same, connecting method, connection structure, and electronic part |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6148903A (en) * | 1984-08-16 | 1986-03-10 | 株式会社東芝 | Method of producing printed circuit board with resistor |
| JPS62266805A (en) * | 1986-05-15 | 1987-11-19 | ダイヤ電子株式会社 | Manufacture of printed resistance element |
| JPS63207101A (en) * | 1987-02-24 | 1988-08-26 | 本田技研工業株式会社 | resistance paste |
-
1989
- 1989-07-05 JP JP1173302A patent/JP2772044B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6500361B1 (en) | 1999-08-02 | 2002-12-31 | Alps Electric Co., Ltd. | Conductive resin composition and encoder switch using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0338004A (en) | 1991-02-19 |
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