JPH0356572A - Electrically conductive ink and production of electrically conductive film - Google Patents
Electrically conductive ink and production of electrically conductive filmInfo
- Publication number
- JPH0356572A JPH0356572A JP1193106A JP19310689A JPH0356572A JP H0356572 A JPH0356572 A JP H0356572A JP 1193106 A JP1193106 A JP 1193106A JP 19310689 A JP19310689 A JP 19310689A JP H0356572 A JPH0356572 A JP H0356572A
- Authority
- JP
- Japan
- Prior art keywords
- conductive
- electrically conductive
- ink
- whiskers
- organic binder
- 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 6
- 239000002245 particle Substances 0.000 claims abstract description 33
- 239000011230 binding agent Substances 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 239000006229 carbon black Substances 0.000 claims abstract description 5
- 238000007650 screen-printing Methods 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 229920000728 polyester Polymers 0.000 abstract description 3
- 230000009974 thixotropic effect Effects 0.000 abstract description 3
- 239000004593 Epoxy Substances 0.000 abstract description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 abstract description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 abstract description 2
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 abstract description 2
- -1 acryl Chemical group 0.000 abstract 1
- 239000000976 ink Substances 0.000 description 25
- 239000004020 conductor Substances 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/09—Use of materials for the conductive, e.g. metallic pattern
- H05K1/092—Dispersed materials, e.g. conductive pastes or inks
- H05K1/095—Dispersed materials, e.g. conductive pastes or inks for polymer thick films, i.e. having a permanent organic polymeric binder
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
Description
この発明は、均一な抵抗値を有する導電膜を形戒するこ
とのできる導電性インキとこの導電性インキを使用した
導電膜の製造方法に関するものである．The present invention relates to a conductive ink that can form a conductive film having a uniform resistance value, and a method of manufacturing a conductive film using this conductive ink.
従来、導電性インキは、銀・銅・ニッケル・カーボンブ
ラックなどの導電性粒子と有機バインダーとを主戒分と
するものであった．
導電性粒子が金属の場合、粒子の形状は球などの等方的
形状に近く、カーボンプラックの場合もグラファイトの
ような盤状のものを除くと、球などの等方的形状に近い
ものである．導電性インキは有機バインダー中にこれら
の導電性粒子が分散しており、基板上に塗布され乾燥す
ると、導電性粒子が互いに接触して導電性を示すように
なる．このような＆ｌ威の導電性インキを基板に塗布す
ることによって、任意のパターンに導電膜を作ることが
できる．なお、ここでいう導電膜とは、導電率の高いも
のだけでなく、導電率の低いもの、つまり一定の抵抗値
を有するような抵抗膜も含むる．Conventionally, conductive inks have mainly consisted of conductive particles such as silver, copper, nickel, and carbon black, and an organic binder. When the conductive particles are metal, the shape of the particles is close to an isotropic shape such as a sphere, and in the case of carbon plaque, the shape is close to an isotropic shape such as a sphere, except for plate-shaped particles such as graphite. be. Conductive ink has these conductive particles dispersed in an organic binder, and when it is applied onto a substrate and dried, the conductive particles come into contact with each other and exhibit conductivity. By applying such conductive ink to a substrate, it is possible to create a conductive film in any desired pattern. Note that the conductive film referred to herein includes not only a film with high conductivity but also a film with low conductivity, that is, a resistive film having a certain resistance value.
導通を確実にするためには、導電性インキ中に多量の導
電性粒子が含有されるようにして導電性粒子が接触しや
すいようにしなければならない．しかし、導電性インキ
の粘度などの印刷適性を考慮すると、無制限に導電性粒
子の割合を増やすわけにもいかない．したがって、この
ような組威の導電性インキを用いて形威される導電膜は
導通が不確実なものとなり、導電率あるいは抵抗値のバ
ラツキが大きいものとなるのは避け難かった．特に、特
定の抵抗値を得るために、導電性粒子の混入量と分散の
度合とをコントロールすることは難しいものであった，
この発明は、このような欠点を解消し、均一な抵抗値を
有する導電膜を形威することのできる導電性インキとこ
の導電性インキを使用した導電膜の製造方法を提供する
ことを目的とする．To ensure continuity, the conductive ink must contain a large amount of conductive particles so that they can easily come into contact with each other. However, when considering printing suitability such as the viscosity of conductive ink, it is not possible to increase the proportion of conductive particles indefinitely. Therefore, conductive films formed using conductive inks of such composition have uncertain conductivity, and it is difficult to avoid large variations in conductivity or resistance values. In particular, it has been difficult to control the amount of conductive particles mixed in and the degree of dispersion in order to obtain a specific resistance value.This invention eliminates these drawbacks and makes it possible to obtain a uniform resistance value. The purpose of the present invention is to provide a conductive ink that can form a conductive film with a conductive film, and a method of manufacturing a conductive film using this conductive ink.
この発明は、前記した目的を達威するために、導電性イ
ンキを、導電性ウィスカーと導電性粒子と有機バインダ
ーとを主成分とするように構威した．
また、この発明の導電膜の製造方法は、導電性ウィスカ
ーと導電性粒子と有機バインダーとを主成分とする導電
性インキを基板上にスクリーン印刷するように構威した
．
この発明をさらに詳しく説明する．
導電性ウィスカーとしては、カーボンや導電化されたチ
タン酸カリウムなどの髭結晶を使用する．また、導電性
ウィスカーは、結晶学的にウィスカーでなくても、その
形状が類似のたとえば繊維状の導電体であってもよい．
導電性ウィスカーの大きさは、長さ２０ｕｍ以下、直径
０．０５〜１．０ｇ ｍ，望ましくは０．１〜０．２μ
ｍで、アスペクト比が１００前後のものを使用するとよ
い．このような形状の導電性ウィスカーを用いることに
より、導電性ウィスカーはスクリーン版のスクリーン目
を通過するので、導電性インクは通常のスクリーン印刷
が可能となる．
導電性粒子としては、銀、銅、ニッケルなどの金属、ま
たはＩＴＯ（インジウム・チン・オキサイド）などの導
電性が付与された還元金属酸化物、あるいは導電性カー
ボンブラック、黒鉛などの有機導電材などを使用するこ
とができる．望ましくは、固有抵抗値が導電性ウィスカ
ーと頬似のカーボンプラックを使用するとよい．
有機バインダーとしては、ポリエステル、塩化ビニル、
アクリル、ウレタン、エボキシなどの通常の熱可塑性ま
たは熱硬化性樹脂バインダーを使用するとよい．
導電性ウィスカーの混入量は、固有抵抗値や比重が異な
る導電性粒子によって異なるが、導電性粒子に対し、重
量比でｌ〜５０％が適当である．また、安定な導電膜を
印刷法によって得るためには厚膜印刷が可能なスクリー
ン印刷を行うことが最適であるが、その場合には導電性
ウィスヵーがスクリーン目を通過するので、導電性ウィ
スヵーの含有量があまり多いと目詰まりなどの問題を生
ずる．たとえば、導電性粒子としてカーボンブラックを
使用した場合、導電性ウィスヵーが２〜１０重量％、カ
ーボンブラックが２０〜６０重量％導電性インキ中に含
有されるようにするとスクリーン印刷に好適である．
導電性インキが導電体として導電性粒子のみを含む場合
は、導電性粒子の分散の安定性と粘度の制御が困難であ
る．またこれとは反対に、導電性ウィスカーのみを含む
場合は、導電性ウィスカーの絡み合い状態にムラが生じ
て均一な導電性を付与することができない．In order to achieve the above-mentioned object, the present invention has constructed a conductive ink containing conductive whiskers, conductive particles, and an organic binder as main components. Furthermore, the method for producing a conductive film of the present invention is configured to screen print a conductive ink containing conductive whiskers, conductive particles, and an organic binder as main components onto a substrate. This invention will be explained in more detail. As the conductive whisker, whisker crystals such as carbon or conductive potassium titanate are used. Further, the conductive whiskers do not have to be crystallographic whiskers, but may be conductors similar in shape, for example, in the form of fibers.
The conductive whiskers have a length of 20 um or less, a diameter of 0.05 to 1.0 g m, and preferably 0.1 to 0.2 μm.
It is best to use one with an aspect ratio of around 100. By using conductive whiskers with such a shape, the conductive whiskers pass through the screen openings of the screen plate, making it possible to use conductive ink in normal screen printing. Examples of conductive particles include metals such as silver, copper, and nickel, reduced metal oxides with conductivity such as ITO (indium tin oxide), or organic conductive materials such as conductive carbon black and graphite. can be used. Preferably, a carbon plaque with a specific resistance value similar to that of a conductive whisker should be used. Organic binders include polyester, vinyl chloride,
It is best to use common thermoplastic or thermosetting resin binders such as acrylic, urethane, and epoxy. The amount of conductive whiskers to be mixed differs depending on the conductive particles having different specific resistance values and specific gravity, but is suitably 1 to 50% by weight of the conductive particles. In addition, in order to obtain a stable conductive film by printing, it is best to perform screen printing, which allows thick film printing, but in that case, the conductive whiskers pass through the screen, so the conductive whiskers are If the content is too high, problems such as clogging may occur. For example, when carbon black is used as the conductive particles, it is suitable for screen printing if the conductive ink contains 2 to 10% by weight of conductive whiskers and 20 to 60% by weight of carbon black. When a conductive ink contains only conductive particles as a conductor, it is difficult to control the dispersion stability and viscosity of the conductive particles. On the other hand, when only conductive whiskers are included, the intertwining of the conductive whiskers becomes uneven and uniform conductivity cannot be imparted.
導電性インキは、導電性ウィスカーと導電性粒子と有機
バインダーとから構威されている．導電性ウィスカーは
、その形状が針状であるため、導電性インキ中の導電性
ウィスカーどうし、あるいは導電性粒子との間で橋渡し
を行い導通が生じる．したがって、導電体として導電性
粒子のみを含む導電性インキに比べると、導電性粒子の
量が少量でも確実に導通し、導電膜の導電率あるいは抵
抗値の均一化に寄与する．
また、印刷適性を高め、しかも抵抗値の均一性に欠くこ
とのできない粘度やチキソトロピー性を適切な値にする
のも、有機バインダーと導電性粒子の割合を設定するの
に自由度が増すため容易となる．Conductive ink is composed of conductive whiskers, conductive particles, and an organic binder. Since conductive whiskers have a needle-like shape, conduction occurs by bridging between conductive whiskers or conductive particles in conductive ink. Therefore, compared to conductive ink containing only conductive particles as conductors, even a small amount of conductive particles provides reliable conduction and contributes to uniformity of the conductivity or resistance value of the conductive film. In addition, it is easy to improve printability and set appropriate values for viscosity and thixotropy, which are essential for uniformity of resistance values, because there is more freedom in setting the ratio of organic binder and conductive particles. becomes.
有機バインダーとしてポリエステルメジウムを用い、中
心粒径０．５μｍのカーボンブランクを３５重量％、最
大長さ１５ｐｍ、直径０．１〜０．１５，ｕｍのカーボ
ンウィスカーを５重量％混入し、さらに１１５０ソルベ
ントとブチルセルロースアセテートを各７重量％混入し
てよく混練した後、３本ロールを通して導電性インキを
調製した．
この導電性インキを１２００のスクリーンでポリエステ
ルフイルム上に３００ Ｘ ３００ｍｓ＋のパターンで
印刷し、１０５℃・３０分間乾燥して導電膜を得た．ラ
ンダムに２０箇所の抵抗値を４ｒａ子法により測定した
ところ、平均抵抗値は８６０Ω／口であり、そのバラツ
キは５％以内であった．Using polyester medium as an organic binder, 35% by weight of carbon blank with a center particle size of 0.5 μm, 5% by weight of carbon whiskers with a maximum length of 15 pm and a diameter of 0.1 to 0.15 μm were mixed, and 1150 solvent was added. and butyl cellulose acetate in an amount of 7% by weight each were mixed and kneaded well, and then passed through three rolls to prepare a conductive ink. This conductive ink was printed on a polyester film in a pattern of 300 x 300 ms+ using a 1200 screen and dried at 105°C for 30 minutes to obtain a conductive film. When resistance values were measured at 20 random locations using the 4RA method, the average resistance value was 860Ω/mouth, and the variation was within 5%.
この発明の導電性インキは、導電性ウイスカーと導電性
粒子と有機バインダーとから構威されている．導電性ウ
イスカーは、その形状の特徴から導電性ウィスカーどう
し、あるいは導電性粒子との間に介在して通電する効果
が大きく、導電体として導電性粒子のみを含む導電性イ
ンキに比べても、形威される印刷膜の導電率あるいは抵
抗値の均一性が大きい．また、導電性粒子の量が少量で
も確実に導通を得ることができる．
さらに、所望の抵抗値を得るために導電体と有機バイン
ダーとの割合を適切な値に設定する自由度が大きくなる
ため、粘度やチキソトロビー性を適切な値にコントロー
ルし、均一な導電膜を形戒することができる導電性イン
キとなる．また、この発明の導電膜の製造方法は、導電
性ウィスカーと導電性粒子と有機バインダーとを主戒分
とする導電性インキを基板上にスクリーン印刷するので
、均一な抵抗値を有する導電膜を容易に製造することが
できる．The conductive ink of this invention is composed of conductive whiskers, conductive particles, and an organic binder. Because of their shape, conductive whiskers have a great effect of intervening between conductive whiskers or conductive particles to conduct electricity, and compared to conductive ink that only contains conductive particles as conductors, they have a much smaller shape. The uniformity of the electrical conductivity or resistance value of the printed film is large. Furthermore, even if the amount of conductive particles is small, continuity can be achieved reliably. Furthermore, since there is greater freedom in setting the ratio of conductor and organic binder to an appropriate value in order to obtain the desired resistance value, it is possible to control viscosity and thixotropic properties to appropriate values and form a uniform conductive film. It becomes a conductive ink that can be used as a conductive ink. In addition, the method for producing a conductive film of the present invention screen-prints a conductive ink containing conductive whiskers, conductive particles, and an organic binder onto a substrate, so that a conductive film having a uniform resistance value can be produced. It can be easily manufactured.
Claims (1)
を主成分とすることを特徴とする導電性インキ。 ２ 導電性ウィスカーが２〜１０重量％、導電性粒子で
あるカーボンブラックが２０〜６０重量％含有されてい
る請求項１記載の導電性インキ。 ３ 導電性ウィスカーと導電性粒子と有機バインダーと
を主成分とする導電性インキを基板上にスクリーン印刷
することを特徴とする導電膜の製造方法。[Scope of Claims] 1. A conductive ink characterized by containing conductive whiskers, conductive particles, and an organic binder as main components. 2. The conductive ink according to claim 1, containing 2 to 10% by weight of conductive whiskers and 20 to 60% by weight of carbon black, which is a conductive particle. 3. A method for producing a conductive film, which comprises screen printing a conductive ink containing conductive whiskers, conductive particles, and an organic binder as main components onto a substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1193106A JPH0356572A (en) | 1989-07-25 | 1989-07-25 | Electrically conductive ink and production of electrically conductive film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1193106A JPH0356572A (en) | 1989-07-25 | 1989-07-25 | Electrically conductive ink and production of electrically conductive film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0356572A true JPH0356572A (en) | 1991-03-12 |
Family
ID=16302344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1193106A Pending JPH0356572A (en) | 1989-07-25 | 1989-07-25 | Electrically conductive ink and production of electrically conductive film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0356572A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100462511B1 (en) * | 1997-02-26 | 2005-07-11 | 다이니폰 인사츠 가부시키가이샤 | Transparent conductive ink |
| CN103013226A (en) * | 2012-12-26 | 2013-04-03 | 赵婕 | Conductive ink composition and preparation method thereof |
| CN103045012A (en) * | 2013-01-18 | 2013-04-17 | 广东佳景科技有限公司 | A kind of antistatic water-based ink and preparation method thereof |
| WO2025109960A1 (en) * | 2023-11-24 | 2025-05-30 | ブラザー工業株式会社 | Ink coating film and dryness measurement method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58196270A (en) * | 1982-05-13 | 1983-11-15 | Toppan Printing Co Ltd | Preparation of electrically conductive paint |
| JPS6295342A (en) * | 1985-10-22 | 1987-05-01 | Toyo Tire & Rubber Co Ltd | Electrically conductive aqueous resin composition |
| JPS63196672A (en) * | 1987-02-11 | 1988-08-15 | Asahi Chem Res Lab Ltd | Carbon paste composition |
| JPS63275681A (en) * | 1987-05-07 | 1988-11-14 | Kawakami Toryo Kk | Electroconductive coating composition for precoat |
| JPH01153752A (en) * | 1987-12-11 | 1989-06-15 | Mitsubishi Metal Corp | Electrically conductive resin composition |
-
1989
- 1989-07-25 JP JP1193106A patent/JPH0356572A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58196270A (en) * | 1982-05-13 | 1983-11-15 | Toppan Printing Co Ltd | Preparation of electrically conductive paint |
| JPS6295342A (en) * | 1985-10-22 | 1987-05-01 | Toyo Tire & Rubber Co Ltd | Electrically conductive aqueous resin composition |
| JPS63196672A (en) * | 1987-02-11 | 1988-08-15 | Asahi Chem Res Lab Ltd | Carbon paste composition |
| JPS63275681A (en) * | 1987-05-07 | 1988-11-14 | Kawakami Toryo Kk | Electroconductive coating composition for precoat |
| JPH01153752A (en) * | 1987-12-11 | 1989-06-15 | Mitsubishi Metal Corp | Electrically conductive resin composition |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100462511B1 (en) * | 1997-02-26 | 2005-07-11 | 다이니폰 인사츠 가부시키가이샤 | Transparent conductive ink |
| CN103013226A (en) * | 2012-12-26 | 2013-04-03 | 赵婕 | Conductive ink composition and preparation method thereof |
| CN103045012A (en) * | 2013-01-18 | 2013-04-17 | 广东佳景科技有限公司 | A kind of antistatic water-based ink and preparation method thereof |
| WO2025109960A1 (en) * | 2023-11-24 | 2025-05-30 | ブラザー工業株式会社 | Ink coating film and dryness measurement method |
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