JPH04177802A - Carbon-based resistive paste - Google Patents
Carbon-based resistive pasteInfo
- Publication number
- JPH04177802A JPH04177802A JP2306488A JP30648890A JPH04177802A JP H04177802 A JPH04177802 A JP H04177802A JP 2306488 A JP2306488 A JP 2306488A JP 30648890 A JP30648890 A JP 30648890A JP H04177802 A JPH04177802 A JP H04177802A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- carbon
- paste
- glycidyl ether
- epoxy resin
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 title claims description 19
- 239000003822 epoxy resin Substances 0.000 claims abstract description 11
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 11
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 9
- 238000007650 screen-printing Methods 0.000 abstract description 6
- 239000000758 substrate Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 238000010304 firing Methods 0.000 abstract description 4
- 150000008065 acid anhydrides Chemical class 0.000 abstract description 3
- 239000000919 ceramic Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- ULKLGIFJWFIQFF-UHFFFAOYSA-N 5K8XI641G3 Chemical compound CCC1=NC=C(C)N1 ULKLGIFJWFIQFF-UHFFFAOYSA-N 0.000 abstract description 2
- 239000004848 polyfunctional curative Substances 0.000 abstract 2
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 abstract 1
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 4
- XLSZMDLNRCVEIJ-UHFFFAOYSA-N 4-methylimidazole Chemical compound CC1=CNC=N1 XLSZMDLNRCVEIJ-UHFFFAOYSA-N 0.000 description 2
- MWSKJDNQKGCKPA-UHFFFAOYSA-N 6-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound C1CC(C)=CC2C(=O)OC(=O)C12 MWSKJDNQKGCKPA-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- -1 2-ethyl-2-ethyl anhydride Chemical class 0.000 description 1
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 1
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229940116411 terpineol Drugs 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は固定抵抗器、可変抵抗器、混成集積回路等の抵
抗体に広く用いられている炭素系抵抗ペーストに関し、
特に耐湿性の優れた炭素系抵抗ペーストに関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a carbon-based resistance paste that is widely used in resistors such as fixed resistors, variable resistors, and hybrid integrated circuits.
In particular, it relates to a carbon-based resistance paste with excellent moisture resistance.
一般に炭素系抵抗体は、カーボンあるいはカーボンと黒
鉛等の導電成分に、フェノール、エポキシ等の熱硬化性
樹脂と、エタノール、テレピネオール等の溶剤を混合、
混練して得た炭素系抵抗ペーストを絶縁基板上にスクリ
ーン印刷し、これを焼成して形成している。Generally, carbon-based resistors are made by mixing a conductive component such as carbon or carbon and graphite with a thermosetting resin such as phenol or epoxy, and a solvent such as ethanol or terpineol.
The carbon-based resistance paste obtained by kneading is screen-printed onto an insulating substrate, and this is then fired.
このようにして形成した炭素系抵抗体は、耐湿放置試験
、耐湿負荷試験等を実施すると試験後の抵抗値変化率が
５％から１０％以上とかなり大きい値となっていた。When the carbon-based resistor thus formed was subjected to a humidity resistance test, a humidity resistance load test, etc., the rate of change in resistance value after the test was quite large, ranging from 5% to 10% or more.
したがって長期的に抵抗値の安定が要求される抵抗体に
炭素系抵抗ペーストを用いる場合には、“抵抗体の形成
方法” （公開特許公報昭５２−９７１９８）にあるよ
うに、焼成して形成した抵抗体の上に、ノボラック型エ
ポキシ樹脂を主体とする保護コートを形成したり、“皮
膜型抵抗器の製造方法” （公開特許公報昭５６−２３
７０９＞にあるように、絶縁基板にスクリーン印刷した
後、予備焼成を行い、その後加熱プレスしてがら圧縮成
形したりすることによって、耐湿試験後の抵抗値変化率
を３％程度に改善していた。Therefore, when using a carbon-based resistor paste for a resistor that requires long-term stability in resistance value, it must be formed by firing as described in "Method for Forming a Resistor" (Publication of Patent Publication No. 52-97198). A protective coat mainly made of novolac type epoxy resin is formed on the resistor.
709>, the resistance change rate after the moisture resistance test was improved to about 3% by screen printing on an insulating substrate, pre-baking, and then compression molding while hot pressing. Ta.
しかし、保護コートを形成したり、圧縮成形しなりする
ことは、抵抗体製造工程が複雑になる、使用材料の選択
範囲が狭くなる等の問題があり、どうしても原価が高く
なるという欠点があった。However, forming a protective coat or compression molding has problems such as complicating the resistor manufacturing process and narrowing the selection range of materials to be used, which inevitably leads to higher costs. .
本発明の目的はかかる従来欠点を除去し、絶縁基板上に
印刷し、焼成するという単純な製造工程により、耐湿性
が優れた抵抗体が得られる炭素系抵抗ペーストを提供す
ることにある。An object of the present invention is to eliminate such conventional drawbacks and provide a carbon-based resistance paste that allows a resistor with excellent moisture resistance to be obtained through a simple manufacturing process of printing on an insulating substrate and baking.
本発明の炭素系抵抗ペーストは、炭素系抵抗ペースト中
に含まれる熱硬化性樹脂にグリシジルエーテル系エポキ
シ樹脂を用いたことを特徴として構成される。The carbon-based resistance paste of the present invention is characterized in that a glycidyl ether-based epoxy resin is used as the thermosetting resin contained in the carbon-based resistance paste.
次に、本発明について図面を参照して説明する６
まず、第１の実施例としては、カーボン粉末（旭カーボ
ン（株）製のＨ８−５００）を重量比１０部と、グリシ
ジルエーテル系エポキシ樹脂（油化シェルエポキシ（株
）製のＥ８２５）を重量比１００部と、硬化剤として酸
無水系の硬化剤メチルテトラヒドロ無水フタル酸（油化
シェルエポキシ（株）製）を重量比８５部と、硬化促進
剤として２−エチル−４メチルイミダゾールを重量比１
部とを混合し、約６０分間攪はんしてスクリーン印刷に
適した粘度の抵抗ペーストを作製する。Next, the present invention will be explained with reference to the drawings.6 First, as a first example, 10 parts by weight of carbon powder (H8-500 manufactured by Asahi Carbon Co., Ltd.) and a glycidyl ether-based epoxy resin were used. (E825 manufactured by Yuka Shell Epoxy Co., Ltd.) in a weight ratio of 100 parts, and an acid anhydride curing agent methyltetrahydrophthalic anhydride (manufactured by Yuka Shell Epoxy Co., Ltd.) as a hardening agent in a weight ratio of 85 parts. 2-ethyl-4 methylimidazole as a curing accelerator at a weight ratio of 1
and stirred for about 60 minutes to produce a resistive paste with a viscosity suitable for screen printing.
この抵抗ペーストをセラミック基板上に一般的なスクリ
ーン印刷法を用いて所定の形状に被着し、空気中で温度
１００度、時間２時間の予備焼成を施し、さらに、温度
２２０度、時間２０時間の本焼成を施すことによって抵
抗体を形成しな。This resistor paste was applied to a ceramic substrate in a predetermined shape using a general screen printing method, pre-baked in air at a temperature of 100 degrees for 2 hours, and further heated at a temperature of 220 degrees for 20 hours. The resistor is formed by subjecting it to final firing.
このようにして得られた抵抗体の面積抵抗値は、２にΩ
／口であり、温度６５度、湿度９０％の耐湿放置試験１
０００時間後の抵抗値変化率は第１図に実施例１として
示したように、２％以下の値を示した。The area resistance value of the resistor obtained in this way is 2Ω
/ Mouth, humidity resistance test 1 at a temperature of 65 degrees and a humidity of 90%
As shown in FIG. 1 as Example 1, the rate of change in resistance value after 000 hours was 2% or less.
次に、第２の実施例としては、カーボン粉末（旭カーボ
ン（株）製のＨ３−５００）を重量比６部と、グリシジ
ルエーテル系エポキシ樹脂（油化シェルエポキシ（株）
製のＥ８２８）を重量比１００部と、硬化剤として酸無
水系の硬化剤メチルテトラヒドロ無水フタル酸（油化シ
ェルエポキシ（株）！りを重量比８０部と、硬化促進剤
として２−エチル−４メチルイミダゾールを重量比１部
とを混合し、約６０分間攪はんしてスクリーン印刷に適
した粘度の抵抗ペーストを作製する。Next, as a second example, 6 parts by weight of carbon powder (H3-500 manufactured by Asahi Carbon Co., Ltd.) and a glycidyl ether-based epoxy resin (produced by Yuka Shell Epoxy Co., Ltd.) were prepared.
80 parts by weight of the acid anhydride curing agent methyltetrahydrophthalic anhydride (Yuka Shell Epoxy Co., Ltd.) as a curing agent, and 2-ethyl-2-ethyl anhydride as a curing accelerator. A resistive paste having a viscosity suitable for screen printing is prepared by mixing 1 part by weight of 4-methylimidazole and stirring for about 60 minutes.
この抵抗ペーストをセラミック基板上に一般的なスクリ
ーン印刷法を用いて所定の形状に被着し、空気中で温度
１００度、時間２時間の予備焼成を施し、さらに、温度
２２０度、時間２０時間の本焼成を施すことによって抵
抗体を形成した。This resistor paste was applied to a ceramic substrate in a predetermined shape using a general screen printing method, pre-baked in air at a temperature of 100 degrees for 2 hours, and further heated at a temperature of 220 degrees for 20 hours. A resistor was formed by performing main firing.
このようにして得られた抵抗体の面積抵抗値は、１５に
Ω／口であり、温度６５度、湿度９０％の耐湿放置試験
１０００時間後の抵抗値変化率は第１図に実施例２とし
て示しであるように、３％以下の値を示した。The sheet resistance value of the resistor obtained in this way was 15Ω/hole, and the rate of change in resistance value after 1000 hours of a humidity resistance test at a temperature of 65 degrees and a humidity of 90% is shown in Figure 1 in Example 2. As shown in the figure, the value was 3% or less.
尚、抵抗値変化率は以下の式により算出した。Note that the rate of change in resistance value was calculated using the following formula.
変化率 初期抵抗値
第１および第２の実施例で示したように、熱硬化性樹脂
にグリシジルエーテル系エポキシ樹脂を用いることによ
り耐湿性が改善されるのは、グリシジルエーテル系エポ
キシ樹脂の吸水率が小さく、熱硬化性樹脂の吸水による
膨張のために発生するカーボンの導電路の部分的な切断
が従来のエポキシ、フェノール等の熱硬化性樹脂より少
ないなめである。Rate of Change Initial Resistance As shown in the first and second examples, the moisture resistance is improved by using a glycidyl ether epoxy resin as a thermosetting resin because of the water absorption rate of the glycidyl ether epoxy resin. is smaller, and the carbon conductive path is less likely to be partially cut due to expansion due to water absorption of the thermosetting resin than with conventional thermosetting resins such as epoxy and phenol.
以上説明したように本発明は、炭素系抵抗ペースト中に
含まれる熱硬化性樹脂にグリシジルエーテル系エポキシ
樹脂を用いることにより、簡単に、長期的に抵抗値が安
定した抵抗体が得られ、その工学的価値は、極めて大き
いものである。As explained above, the present invention uses a glycidyl ether-based epoxy resin as a thermosetting resin contained in a carbon-based resistance paste to easily obtain a resistor whose resistance value is stable over a long period of time. The engineering value is extremely large.
第１図は本発明の実施例の炭素系抵抗ペーストによる抵
抗体の温度６５度、湿度９０％の環境下における耐湿放
置試験の抵抗値変化率を示したものである。FIG. 1 shows the rate of change in resistance value of a resistor made of a carbon-based resistor paste according to an example of the present invention in a humidity resistance test in an environment of a temperature of 65 degrees Celsius and a humidity of 90%.
Claims (1)
ジルエーテル系エポキシ樹脂を用いたことを特徴とする
炭素系抵抗ペースト。A carbon-based resistance paste characterized in that a glycidyl ether-based epoxy resin is used as the thermosetting resin contained in the carbon-based resistance paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2306488A JPH04177802A (en) | 1990-11-13 | 1990-11-13 | Carbon-based resistive paste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2306488A JPH04177802A (en) | 1990-11-13 | 1990-11-13 | Carbon-based resistive paste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04177802A true JPH04177802A (en) | 1992-06-25 |
Family
ID=17957624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2306488A Pending JPH04177802A (en) | 1990-11-13 | 1990-11-13 | Carbon-based resistive paste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04177802A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6381121B1 (en) | 1999-05-24 | 2002-04-30 | Showa Denko Kabushiki Kaisha | Solid electrolytic capacitor |
| US6556427B2 (en) | 2000-03-28 | 2003-04-29 | Showa Denko Kabushiki Kaisha | Solid electrolytic capacitor and method for producing the same |
-
1990
- 1990-11-13 JP JP2306488A patent/JPH04177802A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6381121B1 (en) | 1999-05-24 | 2002-04-30 | Showa Denko Kabushiki Kaisha | Solid electrolytic capacitor |
| US6783703B2 (en) | 1999-05-24 | 2004-08-31 | Showa Denko Kabushiki Kaisha | Solid electrolytic capacitor and method for producing the same |
| US7060205B2 (en) | 1999-05-24 | 2006-06-13 | Showa Denko Kabushiki Kaisha | Solid electrolytic capacitor and method for producing the same |
| US6556427B2 (en) | 2000-03-28 | 2003-04-29 | Showa Denko Kabushiki Kaisha | Solid electrolytic capacitor and method for producing the same |
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