JPH0770267B2 - Transparent touch panel and method of manufacturing the same - Google Patents

Transparent touch panel and method of manufacturing the same

Info

Publication number
JPH0770267B2
JPH0770267B2 JP12765290A JP12765290A JPH0770267B2 JP H0770267 B2 JPH0770267 B2 JP H0770267B2 JP 12765290 A JP12765290 A JP 12765290A JP 12765290 A JP12765290 A JP 12765290A JP H0770267 B2 JPH0770267 B2 JP H0770267B2
Authority
JP
Japan
Prior art keywords
transparent conductive
touch panel
conductive film
surfactant
insulating substrate
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 - Lifetime
Application number
JP12765290A
Other languages
Japanese (ja)
Other versions
JPH0422019A (en
Inventor
壮一 松崎
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.)
Hitachi AIC Inc
Original Assignee
Hitachi AIC Inc
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 Hitachi AIC Inc filed Critical Hitachi AIC Inc
Priority to JP12765290A priority Critical patent/JPH0770267B2/en
Publication of JPH0422019A publication Critical patent/JPH0422019A/en
Publication of JPH0770267B2 publication Critical patent/JPH0770267B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/703—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by spacers between contact carrying layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/024—Properties of the substrate
    • H01H2209/038—Properties of the substrate transparent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/046—Properties of the spacer
    • H01H2209/06—Properties of the spacer transparent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/068—Properties of the membrane
    • H01H2209/082—Properties of the membrane transparent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2211/00—Spacers
    • H01H2211/002—Fluid or inflatable keyboards

Landscapes

  • Push-Button Switches (AREA)
  • Position Input By Displaying (AREA)
  • Manufacture Of Switches (AREA)

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は透明タッチパネル及びその製造方法に関する。TECHNICAL FIELD The present invention relates to a transparent touch panel and a method for manufacturing the same.

（従来の技術） 透明タッチパネルはCRTディスプレイや液晶ディスプレ
イ等の表示体の表面に設置し、情報入力装置や座標指示
装置として利用されている。(Prior Art) A transparent touch panel is installed on the surface of a display body such as a CRT display or a liquid crystal display, and is used as an information input device or a coordinate pointing device.

従来の透明タッチパネルは、絶縁基板にITOなどの透明
導電膜を積層したものを２枚用い、透明導電膜を対向さ
せ絶縁性のスペーサを介して貼り合わせた構造になって
いて、押圧した部分のみが導通する。A conventional transparent touch panel has a structure in which two transparent conductive films such as ITO are laminated on an insulating substrate, and the transparent conductive films are opposed to each other and are bonded to each other via an insulating spacer, and only the pressed portion is pressed. Conducts.

（発明が解決しようとする課題） しかし、従来の構造では対向する透明導電膜の間隔が10
〜100μｍ程度と狭いために湿気が溜り易い。これによ
り、透明導電膜の表面に水滴が付着して透明導電膜を腐
食するために、回路の抵抗が増加する欠点がある。この
欠点を改良するために、ナイロンやエポキシなどの有機
重合体をアセトンやメチルエチルケトンなどの有機溶剤
に溶かした物質を透明導電膜の表面に塗布していた。し
かし、従来の物質では塗布時にムラが生じ易く、抵抗に
ムラを生じる。また、全体が透明なために塗布ムラが目
立つ欠点がある。この塗布ムラを除去するためには、有
機溶剤により過剰部分を溶解すればよいが、この有機溶
剤により絶縁基板が侵食され変質する恐れがあり、また
製造コストも高価になる欠点があった。(Problems to be solved by the invention) However, in the conventional structure, the distance between the transparent conductive films facing each other is 10
Since it is as narrow as about 100 μm, it is easy for moisture to accumulate. As a result, water droplets adhere to the surface of the transparent conductive film and corrode the transparent conductive film, so that the resistance of the circuit increases. In order to improve this drawback, a substance obtained by dissolving an organic polymer such as nylon or epoxy in an organic solvent such as acetone or methyl ethyl ketone is applied to the surface of the transparent conductive film. However, in the case of the conventional substance, unevenness is likely to occur at the time of application, resulting in uneven resistance. Further, since the whole is transparent, there is a drawback that coating unevenness is noticeable. In order to remove the coating unevenness, the excess portion may be dissolved with an organic solvent, but this organic solvent may erode and deteriorate the insulating substrate, and there is a drawback that the manufacturing cost becomes high.

本発明の目的は、以上の欠点を改良し、回路抵抗の安定
なかつ外観の良好な透明タッチパネルを提供するもので
ある。An object of the present invention is to improve the above drawbacks and provide a transparent touch panel with stable circuit resistance and good appearance.

また、本発明の別の目的は、回路抵抗や外観不良を改良
するとともに、製造コストの安い透明タッチパネルの製
造方法を提供するものである。Further, another object of the present invention is to provide a method for manufacturing a transparent touch panel which is improved in circuit resistance and appearance defect and is low in manufacturing cost.

（課題を解決するための手段） 請求項１の発明は、上記の目的を達成するために、表面
に透明導電膜を設けた絶縁基板をスペーサを介して貼り
合わせた透明タッチパネルにおいて、透明導電膜の表面
にフッ素系の界面活性剤からなる層を設けることを特徴
とする透明タッチパネルを提供するものである。(Means for Solving the Problems) In order to achieve the above-mentioned object, the invention of claim 1 is a transparent touch panel in which an insulating substrate having a transparent conductive film on its surface is bonded via a spacer. A transparent touch panel, characterized in that a layer made of a fluorine-based surfactant is provided on the surface of the transparent touch panel.

また、請求項２の発明は、透明導電膜の表面に水に溶け
るフッ素系の界面活性剤からなる層を設け、その後この
界面活性剤の過剰部分を水に溶かす処理を行なうことを
特徴とする透明タッチパネルの製造方法を提供するもの
である。Further, the invention of claim 2 is characterized in that a layer made of a water-soluble fluorine-based surfactant is provided on the surface of the transparent conductive film, and then a treatment for dissolving an excess portion of the surfactant in water is performed. A method for manufacturing a transparent touch panel is provided.

（作用） フッ素系の界面活性剤は撥水性が著しく大きく、これを
透明導電膜の表面に積層すれば、高温高湿下において
も、透明導電膜が水滴によって腐食するのを防止でき
る。(Function) A fluorine-based surfactant has a remarkably large water repellency, and by stacking it on the surface of the transparent conductive film, it is possible to prevent the transparent conductive film from being corroded by water droplets even under high temperature and high humidity.

また、フッ素系の界面活性剤として特に水に溶けるもの
を用いた場合には、界面活性剤を塗布後、塗布ムラを水
により溶解することにより、絶縁基板を変質することな
く、抵抗のムラや外観不良を防止でき、製造コストを低
減できる。When a fluorine-based surfactant that is particularly soluble in water is used, after applying the surfactant, by dissolving the coating unevenness with water, the insulating substrate is not deteriorated and the resistance unevenness or The appearance failure can be prevented and the manufacturing cost can be reduced.

（実施例） 以下、本発明を実施例に基づいて説明する。(Example) Hereinafter, the present invention will be described based on examples.

第１図（イ）及び（ロ）において、１及び２はポリエチ
レンテレフタレート等の高分子フィルムからなる直方形
状の絶縁基板であり、各々長辺及び短辺に突起状のテー
ル部３及び４が設けられている。５及び６は、絶縁基板
１及び２の表面に積層したITO等の透明導電膜であり、
直方形状に複数個形成されている。７及び８は、リード
状の電極であり、透明導電膜５及び６に接触してテール
部３及び４まで形成されている。９及び10は、透明導電
膜５及び６の表面に積層した、フッ素系の界面活性剤の
層である。フッ素系の界面活性剤は、例えば次の通り、
水に溶解する物質を用いる。In FIGS. 1A and 1B, reference numerals 1 and 2 denote rectangular parallelepiped insulating substrates made of a polymer film such as polyethylene terephthalate, and projecting tail portions 3 and 4 are provided on the long side and the short side, respectively. Has been. 5 and 6 are transparent conductive films such as ITO laminated on the surfaces of the insulating substrates 1 and 2,
A plurality of rectangular parallelepiped shapes are formed. Reference numerals 7 and 8 are lead-shaped electrodes, which are formed up to the tail portions 3 and 4 in contact with the transparent conductive films 5 and 6. Reference numerals 9 and 10 are layers of a fluorine-based surfactant, which are laminated on the surfaces of the transparent conductive films 5 and 6. Fluorine-based surfactant, for example, as follows,
Use substances that dissolve in water.

イ）パーフルオロアルキルアミン化合物 例： ロ）パーフルオロアルキルエチレンオキシド付加物 例： Rf（CH2）nO（C2H4O）mCH3 ハ）パーフルオロアルキルアンモニウム塩 例： Rf（CH2）nN（CH3）3J ニ）パーフルオロアルキル燐酸エステル ただし、上記の各化合物において、 Rf＝CnF2n+1（ｎ＝７〜９） R,R′＝C1〜C18 Ｊ＝H,Na,K,I とする。B) Perfluoroalkylamine compounds Example: B) Perfluoroalkyl ethylene oxide adduct Example: Rf (CH 2 ) nO (C 2 H 4 O) mCH 3 ha) Perfluoroalkylammonium salt Example: Rf (CH 2 ) nN (CH 3 ) 3 J Ni) Perfluoroalkyl phosphate ester However, in each of the above compounds, Rf = CnF 2n + 1 (n = 7 to 9) R, R ′ = C 1 to C 18 J = H, Na, K, I.

また、11は絶縁基板２の表面に所定の間隔に設けたドッ
ト状のスペーサである。Further, 11 is a dot-shaped spacer provided on the surface of the insulating substrate 2 at a predetermined interval.

そして、絶縁基板１及び２は、第２図に示す通り、両面
テープ状のスペーサ12を介して、透明導電膜５及び６を
対向させ、互いに交差して貼り合わしている。Then, as shown in FIG. 2, the insulating substrates 1 and 2 are laminated so that the transparent conductive films 5 and 6 are opposed to each other through the spacer 12 in the form of a double-sided tape and cross each other.

次に、上記の透明タッチパネル13の製造方法を述べる。Next, a method for manufacturing the above transparent touch panel 13 will be described.

先ず、真空槽内に帯状の絶縁基板を搬送し、その表面
に、酸化インジウムや酸化スズ等を真空蒸着やイオンプ
レーティングしてITO等の透明導電膜を形成する。次
に、この透明導電膜をエッチングして直方形状に成形す
る。エッチング後、絶縁基板を所定の形状に切断する。
絶縁基板を切断後、その表面の透明導電膜の端部からテ
ール部までAgを印刷してリード状電極を形成する。リー
ド状電極を形成後、一方の絶縁基板の中央部に所定の間
隔で絶縁物をドット状に印刷してスペーサを形成する。
このスペーサを形成後、水にフッ素系界面活性剤を溶解
した溶液中に絶縁基板を浸漬し、取り出して充分に水洗
して過剰な界面活性剤を除去し乾燥して、透明導電膜の
表面に厚さの均一な界面活性剤からなる層を形成する。
この際、ポーラスな透明導電膜であれば、界面活性剤は
孔内面にまで塗布される。界面活性剤の層を形成後、絶
縁基板の周辺に両面テープをはり、透明導電膜が互いに
直交するように絶縁基板を貼り合わせる。First, a belt-shaped insulating substrate is transported into a vacuum chamber, and indium oxide, tin oxide, or the like is vacuum-deposited or ion-plated on the surface thereof to form a transparent conductive film such as ITO. Next, this transparent conductive film is etched to form a rectangular shape. After etching, the insulating substrate is cut into a predetermined shape.
After cutting the insulating substrate, Ag is printed from the end of the transparent conductive film on the surface to the tail to form a lead electrode. After forming the lead-shaped electrode, an insulating material is printed in a dot shape at a predetermined interval on the central portion of one insulating substrate to form a spacer.
After forming this spacer, immerse the insulating substrate in a solution in which a fluorine-based surfactant is dissolved in water, take it out, wash it thoroughly with water to remove excess surfactant, and dry it to form a transparent conductive film on the surface. A layer made of a surfactant having a uniform thickness is formed.
At this time, in the case of a porous transparent conductive film, the surfactant is applied even to the inner surface of the hole. After forming the surface active agent layer, a double-sided tape is applied around the insulating substrate, and the insulating substrates are attached so that the transparent conductive films are orthogonal to each other.

上記の実施例と比較例及び従来例について、透明導電膜
の表面状態、表面抵抗及び高温高湿下における回路抵抗
の変化を測定した。With respect to the above Examples, Comparative Examples, and Conventional Example, changes in the surface state of the transparent conductive film, surface resistance, and circuit resistance under high temperature and high humidity were measured.

透明導電膜の表面状態及び表面抵抗を測定するのに用い
た試料は、絶縁基板を貼り合わせる前のものとし、次の
通りの製造条件とする。The sample used for measuring the surface state and surface resistance of the transparent conductive film is one before being bonded to the insulating substrate, and the manufacturing conditions are as follows.

実施例１） 絶縁基板 厚さ188μm,10cm×10cm角の透明なポリエチ
レンテレフタレートフィルム 透明導電膜 スパッタリング法により形成した厚さ400
ÅのITO リード状電極 Ag ドット状スペーサ UV硬化型アクリル系樹脂を直径30μ
ｍ、高さ30μｍで4mm間隔に印刷して形成する。Example 1) Insulating substrate 188 μm thick, 10 cm × 10 cm square transparent polyethylene terephthalate film Transparent conductive film Thickness 400 formed by sputtering method
Å ITO lead electrode Ag dot spacer UV curable acrylic resin 30μ in diameter
It is formed by printing at 4 mm intervals with a height of 30 m and a height of 30 m.

界面活性剤 パーフルオロアルキルアミン化 合物0.5gを水１中に溶解した液中に絶縁基板を２分間
浸漬して形成する。Surfactant Perfluoroalkylamination The insulating substrate is formed by immersing the insulating substrate in a liquid obtained by dissolving 0.5 g of the compound in 1 of water for 2 minutes.

実施例２） 実施例１）において、界面活性剤としてパーフルオロア
ルキルエチレンオキシド付加物 C8F17（CH2）2O（C2H4O）3CH3 を用いたもの。Example 2) The same as Example 1) except that the perfluoroalkylethylene oxide adduct C 8 F 17 (CH 2 ) 2 O (C 2 H 4 O) 3 CH 3 is used as the surfactant.

実施例３） 実施例１）において、界面活性剤としてパーフルオロア
ルキルアンモニウム塩 を用いたもの。Example 3) In Example 1), a perfluoroalkyl ammonium salt is used as a surfactant. Using.

実施例４） 実施例１）において、界面活性剤としてパーフルオロア
ルキル燐酸エステル を用いたもの。Example 4) In Example 1), a perfluoroalkyl phosphate ester is used as a surfactant. Using.

比較例１ 実施例１）において、界面活性剤として非フッ素系のパ
ーフルオロアルキルエチレンオキシド付加物 C8H17（CH2）2O（C2H4O）3CH3 を用いたもの。Comparative Example 1 In Example 1), a non-fluorine-based perfluoroalkylethylene oxide adduct C 8 H 17 (CH 2 ) 2 O (C 2 H 4 O) 3 CH 3 was used as a surfactant.

従来例１） 実施例１）において、界面活性剤を省略したもの。Conventional Example 1) The same as Example 1) except that the surfactant is omitted.

従来例２） 実施例１）において、界面活性剤の代りに、エポキシ樹
脂0.1gをトルエン1kgに混ぜた物質を用いたもの。Conventional Example 2) A material obtained by mixing 0.1 g of an epoxy resin with 1 kg of toluene in place of the surfactant in Example 1).

なお、試料数は各々10ヶとし、表面状態は目視により透
明導電膜の表面に塗布した物質の塗布ムラの有無を観察
した。結果は表の通りである。The number of samples was 10, and the surface condition was visually inspected for the presence or absence of coating unevenness of the substance coated on the surface of the transparent conductive film. The results are shown in the table.

表から明らかな通り、実施例１〜実施例４によれば、従
来例２に比べて塗布ムラを無くし、表面抵抗を低下でき
る。 As is clear from the table, according to Examples 1 to 4, coating unevenness can be eliminated and surface resistance can be reduced as compared with Conventional Example 2.

また、回路抵抗の変化を測定するのに用いた、実施例５
〜８、比較例２、従来例３及び４の各試料は、各々実施
例１〜４、比較例１、従来例１及び２に用いた試料と、
絶縁基板を10cm×10cm角とし、両面テープで貼り合わせ
た以外は同じ条件で製造したものとする。なお、試験
は、各試料を各々３ヶずつ温度65℃、湿度95％の雰囲気
中に240hr放置後、テール部のリード状電極間の抵抗値
を測定し、初期値に対する変化を求めた。試験結果は、
実施例５〜実施例８が1.1倍、比較例２が1.5倍、従来例
３が2.2倍、従来例４が1.5倍であった。すなわち、実施
例５〜実施例８によれば、従来例３及び４に比べて、回
路抵抗の増加を約50〜73％におさえることができる。Example 5 used to measure changes in circuit resistance
8 to Comparative Examples 2 and 3 and 4 are the samples used in Examples 1 to 4, Comparative Example 1 and Conventional Examples 1 and 2, respectively.
The insulating substrate shall be 10 cm x 10 cm square, and shall be manufactured under the same conditions except that they were attached with double-sided tape. In the test, each of the three samples was left for 240 hours in an atmosphere of a temperature of 65 ° C. and a humidity of 95%, and the resistance value between the lead-shaped electrodes in the tail portion was measured to determine the change from the initial value. The test result is
Examples 5 to 8 were 1.1 times, Comparative Example 2 was 1.5 times, Conventional Example 3 was 2.2 times, and Conventional Example 4 was 1.5 times. That is, according to Examples 5 to 8, the increase in circuit resistance can be suppressed to about 50 to 73% as compared with Conventional Examples 3 and 4.

（発明の効果） 以上の通り、請求項１の発明によれば、透明導電膜の表
面にフッ素系の界面活性剤を積層しているために湿気に
より回路抵抗が増加するのをおさえることができる透明
タッチパネルが得られる。(Effects of the Invention) As described above, according to the invention of claim 1, since the fluorine-based surfactant is laminated on the surface of the transparent conductive film, it is possible to suppress the increase in circuit resistance due to moisture. A transparent touch panel can be obtained.

また、請求項２の発明の製造方法によれば、界面活性剤
を水によって溶解できるため、安いコストで界面活性剤
をムラなく積層でき、表面抵抗の低い透明タッチパネル
が得られる。Further, according to the manufacturing method of the invention of claim 2, since the surfactant can be dissolved in water, the surfactant can be evenly laminated at a low cost, and a transparent touch panel having a low surface resistance can be obtained.

【図面の簡単な説明】[Brief description of drawings]

第１図（イ）及び（ロ）は絶縁基板の平面図、第２図は
透明タッチパネルの断面図を示す。 1,2……絶縁基板、5,6……透明導電膜、9,10……界面活
性剤の層。1 (a) and 1 (b) are plan views of the insulating substrate, and FIG. 2 is a sectional view of the transparent touch panel. 1,2 …… Insulating substrate, 5,6 …… Transparent conductive film, 9,10 …… Surfactant layer.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】表面に透明導電膜を設けた絶縁基板をスペ
ーサを介して貼り合わせた透明タッチパネルにおいて、
透明導電膜の表面にフッ素系の界面活性剤を積層するこ
とを特徴とする透明タッチパネル。1. A transparent touch panel in which an insulating substrate having a transparent conductive film provided on the surface thereof is bonded via a spacer,
A transparent touch panel, characterized in that a fluorine-based surfactant is laminated on the surface of a transparent conductive film. 【請求項２】表面に透明導電膜を設けた絶縁基板をスペ
ーサを介して貼り合わせた透明タッチパネルの製造方法
において、透明導電膜の表面に水に溶けるフッ素系の界
面活性剤を積層し、その後この界面活性剤の過剰部分を
水に溶かす処理を行なうことを特徴とする透明タッチパ
ネルの製造方法。2. A method of manufacturing a transparent touch panel comprising an insulating substrate having a transparent conductive film on the surface thereof, which is attached via a spacer, wherein a water-soluble fluorine-based surfactant is laminated on the surface of the transparent conductive film, A method for manufacturing a transparent touch panel, which comprises performing a treatment of dissolving an excessive portion of the surfactant in water.
JP12765290A 1990-05-17 1990-05-17 Transparent touch panel and method of manufacturing the same Expired - Lifetime JPH0770267B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12765290A JPH0770267B2 (en) 1990-05-17 1990-05-17 Transparent touch panel and method of manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12765290A JPH0770267B2 (en) 1990-05-17 1990-05-17 Transparent touch panel and method of manufacturing the same

Publications (2)

Publication Number Publication Date
JPH0422019A JPH0422019A (en) 1992-01-27
JPH0770267B2 true JPH0770267B2 (en) 1995-07-31

Family

ID=14965390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12765290A Expired - Lifetime JPH0770267B2 (en) 1990-05-17 1990-05-17 Transparent touch panel and method of manufacturing the same

Country Status (1)

Country Link
JP (1) JPH0770267B2 (en)

Also Published As

Publication number Publication date
JPH0422019A (en) 1992-01-27

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