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JPH04209430A - Touch panel and its manufacturing method - Google Patents

Touch panel and its manufacturing method

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Publication number
JPH04209430A
JPH04209430AJP2223908AJP22390890AJPH04209430AJP H04209430 AJPH04209430 AJP H04209430AJP 2223908 AJP2223908 AJP 2223908AJP 22390890 AJP22390890 AJP 22390890AJP H04209430 AJPH04209430 AJP H04209430A
Authority
JP
Japan
Prior art keywords
transparent
electrodes
electrode
touch panel
insulating sheet
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
JP2223908A
Other languages
Japanese (ja)
Inventor
Toshio Matsubara
俊夫 松原
Yoshiyuki Oya
大家 義幸
Yoshihisa Mori
佳久 森
Reiji Hirata
平太 麗司
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.)
Nitto Denko Corp
Original Assignee
Nitto Denko 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 Nitto Denko CorpfiledCriticalNitto Denko Corp
Priority to JP2223908ApriorityCriticalpatent/JPH04209430A/en
Publication of JPH04209430ApublicationCriticalpatent/JPH04209430A/en
Pendinglegal-statusCriticalCurrent

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Abstract

PURPOSE:To improve the position detection accuracy by forming lead electrodes so that the longitudinal directions of lead electrodes provided in opposite two edges of an upper and a lower transference electrodes are transverse to the direction, in which the distribution of resistance is small. CONSTITUTION:An upper transparent sheet 1 and a lower transparent insulating sheet 2, in which transference electrodes 3, 4 made of the transparent conductive film are respectively formed in one surface and lead electrodes 5, 6 are formed in two edges opposite to the electrodes 3, 4, are overlapped with each other so that the electrodes 3, 4 are opposite to each other and transverse to the longitudinal directions of the electrodes 5, 6, and are adhered to each other with an adhesive layer provided, at least, any one of the electrodes 5, 6. A spacer 8 is located between both the electrodes 3, 4 so that the electrodes 3, 4 do not contact to each other under the ordinary condition, and an insulating layer is provided, at least, any one of the electrodes 5, 6 so that the electrodes 5, 6 do not contact to the electrodes 3, 4 to be overlapped. The lead electrodes 5, 6 are formed so that the longitudinal directions of the electrodes 5, 6 are transverse to the direction, in which the distribution of resistance is small.

Description

Translated fromJapanese

【発明の詳細な説明】〔産業上の利用分野〕本発明は検出位置精度の良好な高品質の導電膜接触型透
明アナログ式タッチパネル及びその製造法に関するもの
である。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a high quality conductive film contact type transparent analog touch panel with good detection position accuracy and a method for manufacturing the same.

〔従来の技術〕[Conventional technology]

導電膜接触型タッチパネルは、デジタル式とアナログ式
の二つに分類できる。デジタル式は上部および下部透明
絶縁シートの透明電極をマトリックス状に直交するよう
に形成し、上部透明絶縁シートの上面を押し下げられた
時には、対応するマトリックス電極が接触し導通するこ
とで人力位置を検出するタッチパネルである。これに対
しアナログ式は、検出面全体に透明電極を形成し、押さ
れた時に入力点のアース電極からの電位差を求め、入力
点の座標を算出することによって、連続的な入力位置座
標の変化を検出できるタッチパネルである=一般に、導電膜接触型アナログ式タッチパネル(以下、
単にタッチパネルという)は第1図により説明すると、
片面に透明導電膜により形成された透明電極3.4およ
び該透明電極の向かい合う二辺にリード電極5.6を形
成した上部透明絶縁シート1および下部透明絶縁シート
2を、透明電極3.4が対向し且つ前記リード電極5と
リード電極6の長手方向が直交するように重ね合わせた
基本構成をとる。そしてこれは、ブラウン管、液晶デイ
スプレィ、プラズマデイスプレィ、エレクトロルミネッ
センスデイスプレィ等のデイスプレィ上に重ねられ、各
画面上に表示された意味内容を画面上の表示エリアを指
やペンで押さえたりトレースすることでデータ入力する
透明メンブレンキーボードスイッチとして機能したり、
図形、記号あるいは文字を手書き入力する透明タブレッ
トあるいは透明デジタイザーとして機能する入力装置で
ある。
Conductive film contact type touch panels can be classified into two types: digital type and analog type. In the digital type, the transparent electrodes of the upper and lower transparent insulating sheets are formed to be orthogonal in a matrix pattern, and when the top surface of the upper transparent insulating sheet is pushed down, the corresponding matrix electrodes contact and conduct, detecting the human position. It is a touch panel. On the other hand, with the analog method, a transparent electrode is formed on the entire detection surface, and when the input point is pressed, the potential difference from the ground electrode of the input point is determined, and the coordinates of the input point are calculated, thereby continuously changing the input position coordinates. A touch panel that can detect
(simply referred to as a touch panel) is explained using Figure 1.
The transparent electrode 3.4 covers an upper transparent insulating sheet 1 and a lower transparent insulating sheet 2, each having a transparent electrode 3.4 formed of a transparent conductive film on one side and lead electrodes 5.6 formed on two opposite sides of the transparent electrode. The basic configuration is such that the lead electrodes 5 and 6 are stacked so that they face each other and their longitudinal directions are perpendicular to each other. This is superimposed on a display such as a cathode ray tube, liquid crystal display, plasma display, electroluminescent display, etc., and the meaning displayed on each screen can be traced by pressing the display area on the screen with a finger or pen. Act as a transparent membrane keyboard switch for data entry,
It is an input device that functions as a transparent tablet or transparent digitizer for inputting figures, symbols, or characters by hand.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従来のアナログ式タッチパネルは、手書き入力やデジタ
イザー用途等で用いた場合、入力位置と検出位置のズレ
が大きく、デイスプレィの表示との視差を生じ、誤操作
や誤認識の原因となり、問題である。
Conventional analog touch panels are problematic when used for handwriting input, digitizer applications, etc., as there is a large discrepancy between the input position and the detection position, resulting in parallax with the display, causing erroneous operations and erroneous recognition.

〔問題点を解決するための手段〕[Means for solving problems]

上記問題点を解決するために、本発明者らは、透明電極
の抵抗分布とタッチパネルの検出位置精度の関係に着目
し、検出位置精度の向上を計った結果、上部および下部
透明電極の向かい合う二辺に設けたリード電極の長手方
向が、該透明電極の抵抗分布の小さい方向と直交するよ
うにリード電極を形成することで、検出位置精度が向上
することを見出し本発明に到ったものである。
In order to solve the above problems, the present inventors focused on the relationship between the resistance distribution of the transparent electrode and the detection position accuracy of the touch panel, and as a result of trying to improve the detection position accuracy, we found that the upper and lower transparent electrodes face each other. The present invention was achieved by discovering that the detection position accuracy can be improved by forming the lead electrodes so that the longitudinal direction of the lead electrodes provided on the sides is perpendicular to the direction in which the resistance distribution of the transparent electrode is small. be.

即ち、本発明は入力位置と検出位置のズレが小さい高精
度のタッチパネルに関し、可撓性を有する上部透明絶縁
シートの下面に設けられた上部透明電極と、下部透明絶
縁シートの上面に設けられた下部透明電極を、絶縁性の
スペーサを介して、前記上部および下部透明電極の向か
い合う二辺に設けたリード電極の各々の長手方向を直交
させて接着してなるタッチパネルであって、通常状態で
は前記上部および下部電極が僅かな間隔を維持し、上部
透明絶縁シートの上面を指、ペン等により押し下げた時
には前記上部および下部透明電極が接触し、且つ前記上
部および下部透明電極の向かい合う二辺に設けたリード
電極の長手方向が、前記透明電極の抵抗分布の小さい方
向と直交するように形成されていることを特徴とするも
のであるまた、本発明は上記タッチパネルを製造する方
法に関し、(a)上部および下部透明絶縁シートの片面に透明導電
膜を設ける工程、(b)前記透明導電膜を所望の電極パターンに加工し、
透明電極を形成する工程、(c)前記透明電極の向かい合う二辺に、前記透明導f
t膜の抵抗分布の小さい方向とリード電極の長平方向が
直交するようにリード電極を形成する工程、(d)少なくとも一方の透明絶縁シートのリード電極上
に接着剤層を設ける工程、(e)少なくとも一方の透明絶縁シートの透明電極上に
絶縁性のスペーサを設ける工程、(f)上部および下部透明絶縁シートの透明電極面を対
向させると共に、両透明絶縁シートのリード電極の長手
方向を直交させ、両透明絶縁シートを接着剤層を介して
接着する工程、を含むことを特徴とするものである。
That is, the present invention relates to a high-precision touch panel in which the deviation between an input position and a detection position is small. A touch panel in which a lower transparent electrode is bonded via an insulating spacer so that the longitudinal directions of lead electrodes provided on opposite sides of the upper and lower transparent electrodes are perpendicular to each other. The upper and lower electrodes maintain a slight interval, and when the upper surface of the upper transparent insulating sheet is pressed down with a finger, a pen, etc., the upper and lower transparent electrodes come into contact with each other, and the upper and lower transparent electrodes are provided on two opposite sides of the sheet. The present invention is characterized in that the longitudinal direction of the lead electrode is formed to be perpendicular to the direction in which the resistance distribution of the transparent electrode is small.The present invention also relates to a method for manufacturing the touch panel, comprising: (a) a step of providing a transparent conductive film on one side of the upper and lower transparent insulating sheets; (b) processing the transparent conductive film into a desired electrode pattern;
(c) forming the transparent conductor f on two opposite sides of the transparent electrode;
(d) providing an adhesive layer on at least one of the lead electrodes of the transparent insulating sheet; (e) a step of providing an insulating spacer on the transparent electrode of at least one transparent insulating sheet; (f) making the transparent electrode surfaces of the upper and lower transparent insulating sheets face each other and making the longitudinal directions of the lead electrodes of both transparent insulating sheets orthogonal; , a step of bonding both transparent insulating sheets via an adhesive layer.

本発明のタッチパネルは、第1図に示すように、片面に
透明導電膜により形成された透明電極3.4および該透
明電極の向かい合う二辺にリード電極5.6を形成した
上部透明絶縁シート1および下部透明絶縁シート2を、
透明電極3.4が対向し且つ前記リード電極5.6の長
手方向が直交するように重ね合わせ、前記リード電極5
.6の少なくとも一方に設けられた接着剤N(図示せず
)により接着する。そして透明電極3と透明電極4が通
常状態で接触しないように両電極間にはスペーサ8が配
置され、リード電極5.6が重ね合わされる透明電極3
.4と接触しないように前記リード電極5.6の少なく
とも一方に絶縁層(図示せず)を設ける。
As shown in FIG. 1, the touch panel of the present invention comprises an upper transparent insulating sheet 1 having a transparent electrode 3.4 formed of a transparent conductive film on one side and lead electrodes 5.6 formed on two opposite sides of the transparent electrode. and the lower transparent insulating sheet 2,
The transparent electrodes 3.4 are stacked so that they face each other and the longitudinal directions of the lead electrodes 5.6 are perpendicular to each other, and the lead electrodes 5.
.. 6 with an adhesive N (not shown) provided on at least one of them. A spacer 8 is arranged between the transparent electrodes 3 and 4 so that they do not come into contact with each other in a normal state, and the transparent electrodes 3 and 4 are overlapped with lead electrodes 5 and 6.
.. An insulating layer (not shown) is provided on at least one of the lead electrodes 5.6 so as not to contact the lead electrodes 5.6.

本発明においては、透明電極上に設けられるリード電極
の長手方向が前記透明電極の抵抗分布の小さい方向と直
交するように設けられる。
In the present invention, the longitudinal direction of the lead electrode provided on the transparent electrode is provided so as to be perpendicular to the direction in which the resistance distribution of the transparent electrode is small.

上記のタッチパネルは通常状態では透明電極の間にスペ
ーサがあるため接触しないが、指やペンなどで上部透明
絶縁シート上から押された時には押された部分の透明電
極同士が接触して回路に電流が流れる。
In the above touch panel, there is a spacer between the transparent electrodes in normal conditions, so they do not touch each other, but when pressed from the top transparent insulating sheet with a finger or a pen, the transparent electrodes in the pressed area come into contact with each other and current flows into the circuit. flows.

以下、本発明のタッチパネルの製造法を図面を参照して
説明する。尚、第2図〜第6図においてAは上部透明絶
縁シートに関する図面、Bは下部透明絶縁シートに関す
る図面である。
Hereinafter, a method for manufacturing a touch panel according to the present invention will be explained with reference to the drawings. In FIGS. 2 to 6, A is a drawing regarding the upper transparent insulating sheet, and B is a drawing regarding the lower transparent insulating sheet.

まず、第2図に示すように厚さ0.01〜5゜0mmの
ガラス、ポリエステル、ポリエーテルケトンォン、ポリ
エーテルケトン、ポリエーテルイミドなどの透明絶縁シ
ート1.20片面に、スパッタリング、蒸着スプレー法
などの方法により1〜2000Ω/口のシート抵抗を有
するインジウム・スズ酸化物、スズ酸化物、金、パラジ
ウムなどの透明導電膜3’ 、4’を形成する。
First, as shown in Figure 2, a transparent insulating sheet 1.20 of glass, polyester, polyetherketone, polyetherketone, polyetherimide, etc. with a thickness of 0.01 to 5°0 mm is sputtered and vapor-deposited on one side. Transparent conductive films 3', 4' made of indium tin oxide, tin oxide, gold, palladium, etc. having a sheet resistance of 1 to 2000 Ω/hole are formed by a method such as a spray method.

次いで、第3図に示すように、透明導電膜3′、4′を
エツチングなどにより所望のパターンに加工し、透明電
極3.4とする。なお、この際に後述のリード電極の長
手方向と透明電極3.4の抵抗分布の小さい方向(図中
一方向)とが直交するように、透明電極3.4のパター
ンを調整しておく。
Next, as shown in FIG. 3, the transparent conductive films 3' and 4' are processed into a desired pattern by etching or the like to form transparent electrodes 3.4. At this time, the pattern of the transparent electrode 3.4 is adjusted so that the longitudinal direction of the lead electrode, which will be described later, is perpendicular to the direction in which the resistance distribution of the transparent electrode 3.4 is small (one direction in the figure).

その後、第4図に示すように、透明電極3.4の抵抗分
布の小さい方向(図中一方向)と直交する二辺に導電性
の銀ペーストなどによりリード電極5.6を形成する。
Thereafter, as shown in FIG. 4, lead electrodes 5.6 are formed using conductive silver paste or the like on two sides perpendicular to the direction in which the resistance distribution of the transparent electrode 3.4 is small (one direction in the figure).

次に、第5図に示すようにリード電極5または6の少な
くとも一方に、該リード電極5または6を覆うように、
接着剤層7を設ける。
Next, as shown in FIG. 5, at least one of the lead electrodes 5 or 6 is covered with a
An adhesive layer 7 is provided.

その後、第6図に示すように上部透明電極3または下部
透明電極4の少なくとも一方に、(a)アクリル樹脂、
シリコン樹脂、エポキシ樹脂等の絶縁性の樹脂で高さ5
〜200μm、直径10〜200μmのドツト状のスペ
ーサ8、もしくは(b)噴霧方式やスピンコード方式等
によりスチレン・ジビニルベンゼン共重合体等の粒径5
〜100μmの球状のスペーサ8を形成する。
Thereafter, as shown in FIG. 6, at least one of the upper transparent electrode 3 and the lower transparent electrode 4 is coated with (a) acrylic resin,
Made of insulating resin such as silicone resin or epoxy resin, height 5
~200 μm, a dot-shaped spacer 8 with a diameter of 10 to 200 μm, or (b) a particle size 5 of styrene-divinylbenzene copolymer etc. by a spraying method, spin cord method, etc.
A spherical spacer 8 of ~100 μm is formed.

最後に、第1図に示すように上部透明電極3と下部透明
電極4を、両透明電極3.4上に設けられたリード電極
5.6の長手方向が直交するようにし、且つ前記接着剤
層(図示せず)を介して所定の間隔を保つようにして重
ね合わせて接着する本発明において、抵抗分布は以下の
方法により測定される。第11図に示すように西端子プ
ローブ21 (プローブ間隔5mm)を用いて測定した
電圧(V)および電流(I)から次式によりシート抵抗
(Ω/口)を求める。
Finally, as shown in FIG. 1, the upper transparent electrode 3 and the lower transparent electrode 4 are arranged so that the longitudinal directions of the lead electrodes 5.6 provided on both transparent electrodes 3.4 are perpendicular to each other, and the adhesive In the present invention, in which layers (not shown) are superimposed and bonded to each other while maintaining a predetermined interval, the resistance distribution is measured by the following method. As shown in FIG. 11, the sheet resistance (Ω/hole) is determined from the voltage (V) and current (I) measured using the west terminal probe 21 (probe interval 5 mm) using the following formula.

シート抵抗=(π/ln2 ) ×(V/ I )次い
で、前記シート抵抗を透明電極の縦方向および横方向に
渡って5mm間隔で測定して、その標準偏差の小さいほ
うを抵抗分布の小さい方向とする。
Sheet resistance = (π/ln2) × (V/I) Next, the sheet resistance is measured at 5 mm intervals across the vertical and horizontal directions of the transparent electrode, and the smaller standard deviation is determined as the direction with smaller resistance distribution. shall be.

また、上記工程(a)の透明絶縁シートとして厚さ0.
01〜0.3mmのガラス、ポリエステル、ポリエーテ
ルサルフォン、ボリエーテエーテルケトン、ポリエーテ
ルイミドなどのロール状長尺シートを用い、その片面に
前記の透明導電膜を連続的に形成させれば生産性、抵抗
分布の均一性が向上し好ましい。
Further, the transparent insulating sheet in step (a) above has a thickness of 0.
It can be produced by using a roll-shaped long sheet of glass, polyester, polyethersulfone, polyetheretherketone, polyetherimide, etc. with a thickness of 01 to 0.3 mm, and continuously forming the above-mentioned transparent conductive film on one side of the sheet. This is preferable because it improves the resistance and uniformity of the resistance distribution.

更に、透明電極間の絶縁をより確実にするために、第7
図に示したように接着剤層7の設けられていないリード
電極5または6の上にアクリル樹脂、シリコン樹脂、エ
ポキシ樹脂等の絶縁層9を形成するのが好ましい。
Furthermore, in order to ensure the insulation between the transparent electrodes, a seventh
As shown in the figure, it is preferable to form an insulating layer 9 of acrylic resin, silicone resin, epoxy resin, etc. on the lead electrode 5 or 6 on which the adhesive layer 7 is not provided.

また、第8図に示すように、上記工程(a)〜(c)を
同一の透明絶縁シートを用いて作製し切断して一方を上
部透明絶縁シート、他方を下部透明絶縁シートとすれば
、生産性が向上すると共に抵抗分布特性の均一なものを
得ることができる。
Further, as shown in FIG. 8, if the above steps (a) to (c) are performed using the same transparent insulating sheet and cutting it to make one an upper transparent insulating sheet and the other a lower transparent insulating sheet, Productivity is improved and uniform resistance distribution characteristics can be obtained.

下部透明絶縁シートの厚さが0.01〜0. 2mm程
度と薄い場合には下部透明絶縁シートの透明電極を設け
ていない面に、厚さ0.5〜5mm程度のガラス板を接
着すれば、タッチパネルを液晶デイスプレィ上に重ねた
際、入力時に上部透明絶縁シートを押してもデイスプレ
ィの表示が乱れるのを防ぐことができる。
The thickness of the lower transparent insulating sheet is 0.01~0. If the thickness is as thin as about 2 mm, you can glue a glass plate with a thickness of about 0.5 to 5 mm to the side of the lower transparent insulating sheet that does not have transparent electrodes. This prevents the display from being distorted even if the transparent insulating sheet is pressed.

また、上部透明絶縁シートの透明電極を設けていない面
に、防眩処理した補強用シートやアクリル樹脂、シリコ
ン樹脂、エポキシ樹脂等をコーティングしたプラスチン
クフィルムよりなるハードコート層を設けることもでき
る。これにより、防眩効果、耐傷性、光透過率などが向
上し、指で入力する際の汚れの付着を防ぐことができ、
汚れが付着した際には紙、布等で容易に拭き取ることが
できる。
Furthermore, a hard coat layer made of an anti-glare reinforcing sheet or a plastic film coated with acrylic resin, silicone resin, epoxy resin, etc. can be provided on the surface of the upper transparent insulating sheet on which the transparent electrode is not provided. This improves the anti-glare effect, scratch resistance, light transmittance, etc., and prevents dirt from sticking when typing with your fingers.
When dirt adheres, it can be easily wiped off with paper, cloth, etc.

〔実施例〕〔Example〕

以下、本発明を実施例により具体的に説明する。なお、
以下において作製するタッチパネルは有効面積が20 
cmX20 cmである。
Hereinafter, the present invention will be specifically explained with reference to Examples. In addition,
The touch panel produced below has an effective area of 20
cm x 20 cm.

実施例1上部および下部透明絶縁シートとして厚さ125μmの
ポリエチレンテレフタレート(PET)フィルムを用い
、その片面に反応性スパンタリング法により酸化インジ
ウム−酸化スズの複合酸化物(酸化スズ10重量%)か
らなる表面抵抗約500Ω/口の透明導電膜を形成した
。この透明導電膜の抵抗分布を四端子プローブを用いた
方法で測定する。次いで、リード電極の長手方向と透明
電極の抵抗分布の小さい方向が直交するように、透明導
電膜をエツチングして透明電極を形成し、対向する二辺
に銀ペーストを印刷し、その上にエポキシ樹脂系インク
を厚さ10μmで設けた。その後、上部透明絶縁シート
に設けられたリード電極上に厚さ10μmのアクリル系
接着剤を設け、下部透明絶縁シートに設けられた透明電
極上に粒径10μmスチレン・ジビニルベンゼン共重合
体粒子をスプレー噴霧してスペーサを形成した。最後に
、両透明電極が向かい合い且つリード電極の長手方向が
直交するようにして重ね合わせ前記接着剤層により接着
して本発明のタッチパネルを作製した。
Example 1 A polyethylene terephthalate (PET) film with a thickness of 125 μm was used as the upper and lower transparent insulating sheets, and a composite oxide of indium oxide and tin oxide (10% by weight of tin oxide) was formed on one side by the reactive sputtering method. A transparent conductive film having a surface resistance of approximately 500Ω/hole was formed. The resistance distribution of this transparent conductive film is measured using a four-terminal probe. Next, the transparent conductive film is etched to form a transparent electrode so that the longitudinal direction of the lead electrode and the direction of low resistance distribution of the transparent electrode are perpendicular to each other, silver paste is printed on two opposing sides, and epoxy is applied on top of the transparent conductive film. A resin ink was applied to a thickness of 10 μm. After that, an acrylic adhesive with a thickness of 10 μm is applied on the lead electrode provided on the upper transparent insulating sheet, and styrene-divinylbenzene copolymer particles with a particle size of 10 μm are sprayed onto the transparent electrode provided on the lower transparent insulating sheet. A spacer was formed by spraying. Finally, the two transparent electrodes were stacked so that they faced each other and the longitudinal directions of the lead electrodes were perpendicular to each other, and were bonded together using the adhesive layer to produce a touch panel of the present invention.

実施例2透明絶縁シートとして長尺のPETシート(厚さ125
μm)を用い、透明導電膜を連続的に形成したのち切断
する他は実施例1と同様にしてタッチパネルを作製した
Example 2 A long PET sheet (thickness 125 mm) was used as a transparent insulating sheet.
A touch panel was produced in the same manner as in Example 1 except that a transparent conductive film was continuously formed using a transparent conductive film (μm) and then cut.

実施例3上部および下部透明絶縁シートとして、長尺の厚さ75
μmのPETフィルムを用い、その片面に反応性スパッ
タリング法により酸化インジウム−酸化スズの複合酸化
物(酸化スズ10重量%)からなる表面抵抗約500Ω
/口の透明導電膜を連続的に形成した。次いで、長尺の
ままリード電極の長手方向と透明電極の抵抗分布の小さ
い方向が直交するように、透明導電膜をエツチングして
透明電極を形成し、対向する二辺に銀ペーストを印刷し
、第8図に示すように一方の透明電極上のリード電極上
にエポキシ樹脂系インクを厚さ10μmで設け、他方の
透明電極上のリード電極上に厚さ10μmでアクリル系
接着剤を設け、長尺シートを縦横両方向に切断した。エ
ポキシ樹脂系インクが設けられている方を上部透明絶縁
シートとして、アクリル系接着剤が設けられている方を
下部透明絶縁シートとして用いる。そして、上部透明絶
縁シートの透明電極を設けていない面に厚さ20μmの
アクリル系接着剤を介して片面がアクリル系樹脂でハー
ドコートされた125μmのPETフィルムのハードコ
ート面が外側になるようにして接着した。一方下部透明
絶縁シートの透明!極には粒径10μmのスチレン・ジ
ビニル、ベンゼン共重合体粒子をスプレー噴霧してスペ
ーサを形成した。最後に、両透明電極が向かい合い且つ
リード電極の長手方向が直交するようにして重ね合わせ
前記接着剤層により接着して本発明のタッチパネルを作
製した。
Example 3 As the upper and lower transparent insulating sheets, a long sheet with a thickness of 75 mm
A surface resistance of about 500Ω is obtained by using a μm PET film, and one side of the film is made of a composite oxide of indium oxide and tin oxide (10% by weight of tin oxide) by reactive sputtering.
/ A transparent conductive film was continuously formed. Next, the transparent conductive film is etched to form a transparent electrode so that the longitudinal direction of the lead electrode is perpendicular to the direction in which the resistance distribution of the transparent electrode is small, and silver paste is printed on two opposing sides. As shown in Figure 8, epoxy resin ink is applied to a thickness of 10 μm on the lead electrode on one transparent electrode, and acrylic adhesive is applied to a thickness of 10 μm on the lead electrode on the other transparent electrode. The shaku sheet was cut in both length and width directions. The side provided with the epoxy resin ink is used as the upper transparent insulating sheet, and the side provided with the acrylic adhesive is used as the lower transparent insulating sheet. Then, one side of the upper transparent insulating sheet on which the transparent electrode is not provided is hard-coated with an acrylic resin using a 20-μm thick acrylic adhesive, so that the hard-coated surface of the PET film is on the outside. I glued it. On the other hand, the lower transparent insulation sheet is transparent! A spacer was formed on the pole by spraying styrene-divinyl-benzene copolymer particles having a particle size of 10 μm. Finally, the two transparent electrodes were stacked so that they faced each other and the longitudinal directions of the lead electrodes were perpendicular to each other, and were bonded together using the adhesive layer to produce a touch panel of the present invention.

実施例4上部および下部透明絶縁シートとして長尺の厚さ75μ
mのPETフィルムを用い、その片面に反応性スパッタ
リング法により酸化インジウム−酸化スズの複合酸化物
(酸化スズ10重量%)からなる表面抵抗約500Ω/
口の透明導電膜を連続的に形成した。次いで、実施例3
と同様にして長尺のままリード電極の長手方向と透明電
極の抵抗分布の小さい方向が直交するように、透明導電
膜をエツチングして透明電極を形成し、対向する二辺に
銀ペーストを印刷し、その上にエポキシ樹脂系インクを
厚さ10μmで設け、上部透明絶縁シートに設けられた
リード電極上に厚さ10μmでアクリル系接着剤を設け
、長尺シートを切断した。そして、上部透明絶縁シート
の透明電極を設けていない面に厚さ20μmのアクリル
系接着剤を介して厚さ0.2mmのガラスと接着した。
Example 4 Long thickness of 75μ as upper and lower transparent insulating sheets
A PET film of 500 Ω/mm is used, and one side of the film is coated with a surface resistance of approximately 500 Ω/cm made of a composite oxide of indium oxide and tin oxide (10% by weight of tin oxide) by reactive sputtering.
A transparent conductive film for the mouth was continuously formed. Next, Example 3
In the same manner as above, the transparent conductive film is etched to form a transparent electrode so that the longitudinal direction of the long lead electrode and the direction of low resistance distribution of the transparent electrode are perpendicular to each other, and silver paste is printed on the two opposing sides. Then, an epoxy resin ink was applied thereon to a thickness of 10 μm, an acrylic adhesive was applied to a thickness of 10 μm on the lead electrode provided on the upper transparent insulating sheet, and the long sheet was cut. Then, glass with a thickness of 0.2 mm was bonded to the surface of the upper transparent insulating sheet on which the transparent electrode was not provided via an acrylic adhesive with a thickness of 20 μm.

−方下部透明絶縁シートの透明電極を設けていない面に
厚さ20μmのアクリル系接着剤を介して厚さ1.1m
mのガラスを接着し、透明電極には粒径10μmのスチ
レン・ジビニルヘンゼン共重合体粒子をスプレー噴霧し
てスペーサを形成した。
- A 1.1 m thick layer of acrylic adhesive with a thickness of 20 μm is applied to the side of the lower transparent insulating sheet on which the transparent electrode is not provided.
A spacer was formed on the transparent electrode by spraying styrene-divinylhenzene copolymer particles with a particle size of 10 μm.

最後に、両透明電極が向かい合い且つリード電極の長手
方向が直交するようにして重ね合わせ前記接着剤層によ
り接着して本発明のタッチパネルを作製した。
Finally, the two transparent electrodes were stacked so that they faced each other and the longitudinal directions of the lead electrodes were perpendicular to each other, and were bonded together using the adhesive layer to produce a touch panel of the present invention.

比較例1リード電極の長手方向と透明電極の抵抗分布の小さい方
向が平行になるようにしてリード電極を設ける他は実施
例1と同様にしてタッチパネルを作製した。
Comparative Example 1 A touch panel was produced in the same manner as in Example 1, except that the lead electrodes were provided so that the longitudinal direction of the lead electrodes and the direction of the small resistance distribution of the transparent electrode were parallel to each other.

比較例2上部透明絶縁シートとして厚さ0.2mmのガラス板、
下部透明絶縁シートとして厚さ161mmのガラス板を
用いる他は全て比較例1と同様にしてタッチパネルを作
製した。
Comparative Example 2 A glass plate with a thickness of 0.2 mm was used as the upper transparent insulating sheet,
A touch panel was produced in the same manner as Comparative Example 1 except that a glass plate with a thickness of 161 mm was used as the lower transparent insulating sheet.

上記実施例1〜4および比較例1.2で得られたタッチ
パネルについて以下の評価を行った。
The touch panels obtained in Examples 1 to 4 and Comparative Example 1.2 were evaluated as follows.

く検出精度〉第9図に示す回路により線分ABおよびCDにそって5
mm間隔で各点Pでの電位を測定し、その測定値から各
点での入力位置と検出位置のズレの割合(e)を求めた
。この(e)の和(E)を検出精度とする。この(E)
が小さい程検出精度が高いことを意味する。尚、各点P
でのズレの割合(e)は測定値と理論値(第10図の回
帰直線に相当)の差をΔ■、とじた時に次式により求め
られる。
Detection Accuracy> The circuit shown in Figure 9 detects 5 points along line segments AB and CD.
The potential at each point P was measured at intervals of mm, and the ratio (e) of the deviation between the input position and the detected position at each point was determined from the measured value. The sum (E) of this (e) is defined as the detection accuracy. This (E)
The smaller the value, the higher the detection accuracy. Furthermore, each point P
The deviation ratio (e) can be determined by the following equation when the difference between the measured value and the theoretical value (corresponding to the regression line in FIG. 10) is divided by Δ■.

Δ■。Δ■.

e=         X100  (%)VA−V。e=       X100 (%)VA-V.

E=Σe (%)く光透過率〉島津製作所製の分光分析装置UV−240を用いて、光
波長550 nmにおける可視光線透過率を測定した。
E=Σe (%) Light transmittance> Visible light transmittance at a light wavelength of 550 nm was measured using a spectrometer UV-240 manufactured by Shimadzu Corporation.

〈表面硬度〉タッチパネル上部透明絶縁シートの上面を、JIs  
K  5400に準じ、鉛筆引っ掻き試験により評価し
た。
<Surface hardness> The top surface of the transparent insulating sheet above the touch panel is JIs
Evaluation was performed by a pencil scratch test according to K5400.

〈液晶への影響〉液晶デイスプレィ上に0.2mmの間隔を保つようにタ
ッチパネルを保持し、ペン先形状R0゜8のプラスチッ
クペンに400gの荷重を加えた時、デイスプレィの表
示が変化しないか目視により判定した。
<Effect on LCD> Hold the touch panel so as to keep a distance of 0.2 mm above the LCD display, and visually check whether the display changes when a 400 g load is applied to a plastic pen with a pen tip shape of R0゜8. Judgment was made by

上記の評価結果を第1表に示す。The above evaluation results are shown in Table 1.

第   1   表〔発明の効果]以上の結果からも明らかなように、本発明のタッチパネ
ルは上記のように透明電極の抵抗分布とリード電極の方
向に特定の関係を有しているので位置検出精度の良好な
高精度のものである。また、本発明の製造法によれば位
置検出精度の良好な上記タッチパネルを作製することが
できる。
Table 1 [Effects of the Invention] As is clear from the above results, the touch panel of the present invention has a specific relationship between the resistance distribution of the transparent electrode and the direction of the lead electrode as described above, so the position detection accuracy is improved. It is of good high precision. Moreover, according to the manufacturing method of the present invention, the touch panel with good position detection accuracy can be manufactured.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はタッチパネルの概略を示す斜視図、第2〜8図
は本発明のタッチパネルの製造法を示す断面図、第9〜
10図はタッチパネルの位置検出精度の評価方法を示す
斜視図、第11図は四端子プローブを示す斜視図である
。1・・・上部透明絶縁シート2・・・下部透明絶縁シート3・・・上部透明電極4・・・下部透明電極5.6・ ・ ・リード電極7・・・接着剤層8・・・スペーサ9.10・・・絶縁層
FIG. 1 is a perspective view schematically showing a touch panel, FIGS. 2 to 8 are cross-sectional views showing a method for manufacturing a touch panel of the present invention, and
FIG. 10 is a perspective view showing a method for evaluating position detection accuracy of a touch panel, and FIG. 11 is a perspective view showing a four-terminal probe. 1... Upper transparent insulating sheet 2... Lower transparent insulating sheet 3... Upper transparent electrode 4... Lower transparent electrode 5.6... Lead electrode 7... Adhesive layer 8... Spacer 9.10...Insulating layer

Claims (1)

Translated fromJapanese
【特許請求の範囲】(1)可撓性を有する上部透明絶縁シートの下面に設け
られた上部透明電極と、下部透明絶縁シートの上面に設
けられた下部透明電極を、絶縁性のスペーサを介して、
前記上部および下部透明電極の向かい合う二辺に設けた
リード電極の各々の長手方向を直交させて接着してなる
タッチパネルであって、通常状態では前記上部および下
部電極が僅かな間隔を維持し、上部透明絶縁シートの上
面を指、ペン等により押し下げた時には前記上部および
下部透明電極が接触し、且つ前記上部および下部透明電
極の向かい合う二辺に設けたリード電極の長手方向が、
前記透明電極の抵抗分布の小さい方向と直交するように
形成されていることを特徴とするタッチパネル。(2)(a)上部および下部透明絶縁シートの片面に透
明導電膜を設ける工程、(b)前記透明導電膜を所望の電極パターンに加工し、
透明電極を形成する工程、(c)前記透明電極の向かい合う二辺に、前記透明導電
膜の抵抗分布の小さい方向とリード電極の長手方向が直
交するようにリード電極を形成する工程、(d)少なくとも一方の透明絶縁シートのリード電極上
に接着剤層を設ける工程、(e)少なくとも一方の透明絶縁シートの透明電極上に
絶縁性のスペーサを設ける工程、(f)上部および下部透明絶縁シートの透明電極面を対
向させると共に、両透明絶縁シートのリード電極の長手
方向を直交させ、両透明絶縁シートを接着剤層を介して
接着する工程、を含むことを特徴とするタッチパネルの製造法。(3)
上記(a)工程の透明絶縁シートとして、長尺透明シー
トを用い連続的に製造することを特徴とする請求項(2
)記載のタッチパネルの製造法。(4)上記(a)〜(
c)工程を同一の透明絶縁シートで行うことを特徴とす
る請求項(2)記載のタッチパネルの製造法。(5)リード電極の長手方向と長尺透明シートの長手方
向が直交するようにリード電極を形成することを特徴と
する請求項(3)記載のタッチパネルの製造法。
[Claims] (1) The upper transparent electrode provided on the lower surface of the flexible upper transparent insulating sheet and the lower transparent electrode provided on the upper surface of the lower transparent insulating sheet are connected via an insulating spacer. hand,
The touch panel is formed by adhering lead electrodes provided on two opposing sides of the upper and lower transparent electrodes with their respective longitudinal directions perpendicular to each other, and in a normal state, the upper and lower electrodes maintain a slight interval, and the upper and lower transparent electrodes When the upper surface of the transparent insulating sheet is pressed down with a finger, a pen, etc., the upper and lower transparent electrodes come into contact, and the longitudinal direction of the lead electrodes provided on the two opposite sides of the upper and lower transparent electrodes is
A touch panel characterized in that the transparent electrode is formed so as to be perpendicular to the direction in which the resistance distribution of the transparent electrode is small. (2) (a) providing a transparent conductive film on one side of the upper and lower transparent insulating sheets; (b) processing the transparent conductive film into a desired electrode pattern;
(c) forming lead electrodes on two opposing sides of the transparent electrode so that the direction of the small resistance distribution of the transparent conductive film and the longitudinal direction of the lead electrodes are orthogonal; (d) (e) providing an insulating spacer on the transparent electrode of at least one transparent insulating sheet; (f) providing an adhesive layer on the lead electrode of at least one transparent insulating sheet; (f) providing an adhesive layer on the lead electrode of at least one transparent insulating sheet; A method for manufacturing a touch panel, comprising the steps of: aligning the transparent electrode surfaces facing each other, making the longitudinal directions of the lead electrodes of both transparent insulating sheets orthogonal, and bonding both transparent insulating sheets via an adhesive layer. (3)
Claim (2) characterized in that the transparent insulating sheet in step (a) is manufactured continuously using a long transparent sheet.
) The method for manufacturing the touch panel described in (4) Above (a) to (
3. The method for manufacturing a touch panel according to claim 2, wherein step c) is performed using the same transparent insulating sheet. (5) The method for manufacturing a touch panel according to claim (3), wherein the lead electrodes are formed so that the longitudinal direction of the lead electrodes and the longitudinal direction of the long transparent sheet are perpendicular to each other.
JP2223908A1990-08-231990-08-23 Touch panel and its manufacturing methodPendingJPH04209430A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP2223908AJPH04209430A (en)1990-08-231990-08-23 Touch panel and its manufacturing method

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP2223908AJPH04209430A (en)1990-08-231990-08-23 Touch panel and its manufacturing method

Publications (1)

Publication NumberPublication Date
JPH04209430Atrue JPH04209430A (en)1992-07-30

Family

ID=16805598

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP2223908APendingJPH04209430A (en)1990-08-231990-08-23 Touch panel and its manufacturing method

Country Status (1)

CountryLink
JP (1)JPH04209430A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
KR100487356B1 (en)*2001-12-172005-05-03엘지.필립스 엘시디 주식회사Method of forming signal line of touch panel
KR100539582B1 (en)*2000-08-262005-12-29엘지.필립스 엘시디 주식회사Touch panel and method for fabricating the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
KR100539582B1 (en)*2000-08-262005-12-29엘지.필립스 엘시디 주식회사Touch panel and method for fabricating the same
KR100487356B1 (en)*2001-12-172005-05-03엘지.필립스 엘시디 주식회사Method of forming signal line of touch panel

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