JP5464608B2 - Touch sensor with decoration and method for manufacturing the same - Google Patents

Touch sensor with decoration and method for manufacturing the same Download PDF

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JP5464608B2
JP5464608B2 JP2011281600A JP2011281600A JP5464608B2 JP 5464608 B2 JP5464608 B2 JP 5464608B2 JP 2011281600 A JP2011281600 A JP 2011281600A JP 2011281600 A JP2011281600 A JP 2011281600A JP 5464608 B2 JP5464608 B2 JP 5464608B2
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transparent conductive
base material
decoration
film layer
touch sensor
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JP2013131129A (en
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富士男 森
史明 柴山
秀樹 小出
博子 清水
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Nissha Printing Co Ltd
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Nissha Printing Co Ltd
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Priority to KR1020147017302A priority patent/KR101600871B1/en
Priority to CN201280062608.6A priority patent/CN104024994B/en
Priority to US14/367,778 priority patent/US9320140B2/en
Priority to PCT/JP2012/082663 priority patent/WO2013094561A1/en
Priority to TW101148645A priority patent/TWI489339B/en
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本発明は、ガラス基材の内側面に、透明導電膜層及び加飾印刷層が形成されたフィルム基材の透明導電センサが貼り付け形成された装飾付きタッチセンサの発明であって、とくにガラス基材の中央部は平坦で、外形部は立ち上がり形状になっており、中央部には透明導電膜層の回路が形成され、立ち上がり形状部には該透明導電膜層の回路からの電気信号を検出する引き回し回路及び該引き回し回路を覆い隠す加飾印刷層が形成されていることを特徴とする装飾付きタッチセンサ及びその製造方法に関する。   The present invention is an invention of a touch sensor with a decoration, in which a transparent conductive sensor of a film substrate in which a transparent conductive film layer and a decorative print layer are formed is attached to the inner side surface of a glass substrate, and in particular, glass. The central part of the substrate is flat and the outer part has a rising shape, a circuit of a transparent conductive film layer is formed in the central part, and an electric signal from the circuit of the transparent conductive film layer is formed in the rising shape part. The present invention relates to a touch sensor with a decoration, and a method for manufacturing the touch sensor, in which a decorative printed layer that covers the routing circuit to be detected and covers the routing circuit is formed.

従来、ガラス基材の内側面に、透明導電膜層及び加飾印刷層が形成されたフィルム基材の透明導電センサが貼り付け形成されたタッチパネルの発明として、特許文献1の発明があった。
特開2009−169974
Conventionally, there has been an invention of Patent Document 1 as an invention of a touch panel in which a transparent conductive sensor of a film substrate in which a transparent conductive film layer and a decorative print layer are formed is attached to an inner surface of a glass substrate.
JP2009-169974

しかし特許文献1の発明のタッチパネルは、引き回し回路を覆い隠す加飾印刷層の箇所は額縁部分となり、どうしても外形寸法の割にディスプレイ部分が小さくなる(とくに短辺方向が小さい)問題が生じる。しかし、狭額縁化の市場ニーズは高く、これに対応するには引き回し回路の線幅及び線間を細く狭くするしかないが、そのようにすれば抵抗値が上がって電気信号の検出が鈍くなるだけでなく、生産性が低下する問題があった。   However, in the touch panel of the invention of Patent Document 1, a portion of the decorative print layer that covers the routing circuit becomes a frame portion, and there is a problem that the display portion is inevitably small for the outer dimensions (especially, the short side direction is small). However, the market needs for narrowing the frame are high, and the only way to respond to this is to narrow and narrow the line width and line spacing of the routing circuit, but doing so increases the resistance and slows down the detection of electrical signals. In addition, there was a problem that productivity decreased.

また、表面のガラスを化学処理などの方法で強化してもガラス基材の側面部は強化が不十分でかつ鋭利な形状になるため、携帯電話やタブレットなどの最終製品で使用している消費者が誤って落とした場合に、横又は斜め横方向から衝撃が加われば、簡単にガラス基材が割れてしまう問題があった。   In addition, even if the glass on the surface is tempered by chemical treatment or other methods, the side surfaces of the glass substrate are insufficiently reinforced and have a sharp shape, so consumption that is used in final products such as mobile phones and tablets When a person accidentally drops the glass substrate, there is a problem that the glass substrate is easily broken if an impact is applied from the lateral or oblique lateral direction.

本発明は、上記の課題を解決するためになされたもので、額縁部分の割合を少なくしてディスプレイ部分の割合を高くするという市場ニーズに対応し、強度が十分である装飾付きタッチセンサ及びその製造方法を提供することを目的とする。   The present invention has been made in order to solve the above-described problems. The touch sensor with decoration has sufficient strength in response to the market need to increase the proportion of the display portion by reducing the proportion of the frame portion, and its An object is to provide a manufacturing method.

上記の目的を達成するため、本発明の第1の特徴構成は、中央部は平坦で外形部は立ち上がり形状のガラス基材の内側面に、透明導電膜層及び加飾印刷層が形成されたフィルム基材の透明導電センサが貼り付け形成された装飾付きタッチセンサであって、中央部には透明導電膜層の回路が形成され、立ち上がり形状部には該透明導電膜層の回路からの電気信号を検出する引き回し回路及び該引き回し回路を覆い隠す加飾印刷層が形成されていることを特徴とする装飾付きタッチセンサである。   In order to achieve the above object, according to the first characteristic configuration of the present invention, a transparent conductive film layer and a decorative printing layer are formed on the inner surface of a glass substrate having a flat central portion and a rising outer shape. A touch sensor with a decoration on which a transparent conductive sensor of a film base is pasted and formed, wherein a circuit of a transparent conductive film layer is formed in a central portion, and an electric power from the circuit of the transparent conductive film layer is formed in a rising shape portion. It is a touch sensor with a decoration, characterized in that a routing circuit for detecting a signal and a decorative printed layer for covering the routing circuit are formed.

この特徴構成によると、加飾印刷層が形成される部分が主にガラス基材の側面部になるため、引き回し回路の線幅及び線間を細く狭くしなくとも、視認者が上面からタッチセンサを観察した場合に、額縁部分が少なくなりディスプレイ部分の割合を高くすることができる。したがって、電気信号の検出が鈍くなったり、生産性が低下したりすることなく、狭額縁化の市場ニーズに対応することができる。   According to this characteristic configuration, the portion where the decorative print layer is formed is mainly the side surface portion of the glass substrate, so that the viewer can touch the touch sensor from the upper surface without narrowing and narrowing the line width and the line spacing of the routing circuit. , The frame portion is reduced and the proportion of the display portion can be increased. Therefore, it is possible to meet the market needs for narrowing the frame without slowing down the detection of electrical signals and reducing productivity.

本発明の第2の特徴構成は、前記透明導電膜層が、導電繊維を含むことを特徴とする装飾付きタッチセンサである。本発明の第3の特徴構成は、前記透明導電膜層が、チオフェン系導電ポリマーを含むことを特徴とする装飾付きタッチセンサである。本発明の第4の特徴構成は、前記透明導電膜層が、微細なメッシュパターン化させた金属膜からなる透明導電膜であることを特徴とする装飾付きタッチセンサである。本発明の第5の特徴構成は、前記透明導電膜層が、自己組織化させた金属微粒子パターンからなることを特徴とする装飾付きタッチセンサである。   A second characteristic configuration of the present invention is the touch sensor with decoration, wherein the transparent conductive film layer includes conductive fibers. A third characteristic configuration of the present invention is a touch sensor with decoration, wherein the transparent conductive film layer includes a thiophene-based conductive polymer. A fourth characteristic configuration of the present invention is the touch sensor with decoration, wherein the transparent conductive film layer is a transparent conductive film made of a fine mesh-patterned metal film. A fifth characteristic configuration of the present invention is the touch sensor with decoration, wherein the transparent conductive film layer is formed of a self-organized metal fine particle pattern.

これらの特徴構成によると、透明導電膜層が耐屈曲性を有するため、従来のインジウムスズ酸化物(ITO)の透明導電膜では対応できなかった立ち上がりの大きい形状にも追随できる。また、クラックなどが生じにくいため、取り扱いがしやすく、貼り合わせ加工時の生産性が向上する長所もある。   According to these characteristic configurations, since the transparent conductive film layer has bending resistance, it is possible to follow a shape having a large rise that cannot be handled by a conventional transparent conductive film of indium tin oxide (ITO). In addition, since cracks and the like are not easily generated, handling is easy, and there is an advantage that productivity at the time of bonding is improved.

本発明の第6の特徴構成は、前記ガラス基材がアルミノケイ酸ガラスであり、外形部の立ち上がり形状を形成した後、化学処理を行って強度を向上させた化学強化ガラスであることを特徴とする装飾付きタッチセンサである。この特徴構成によると、ガラス基材の側面部も強化がされるので横又は斜め横方向からの衝撃にも強くなり、消費者が誤って落とした場合でもガラス基材が割れてしまうケースが少なくなる。また、貼り合わせる際の応力にも耐えやすくなるので貼り合わせ加工時の生産性が向上する。   A sixth characteristic configuration of the present invention is characterized in that the glass substrate is aluminosilicate glass, and a chemically tempered glass whose strength is improved by performing chemical treatment after forming a rising shape of the outer shape. It is a touch sensor with decoration. According to this characteristic configuration, the side surface portion of the glass base material is also strengthened, so that it is strong against impacts from the side or diagonal directions, and there are few cases where the glass base material breaks even if the consumer accidentally drops it. Become. Moreover, since it becomes easy to endure the stress at the time of bonding, the productivity at the time of bonding improves.

本発明の第7の特徴構成は、前記フィルム基材の透明導電センサが貼り付けられた箇所のガラス基材の形状が二次曲面であることを特徴とする装飾付きタッチセンサである。この特徴構成によると、フィルム基材の透明導電センサがガラス基材の形状に沿いやすく、貼り合わせる際に発生しやすいシワ等の不良が少なくなる。その結果、貼り合わせ加工時の生産性が向上する。   A seventh characteristic configuration of the present invention is the touch sensor with decoration, wherein the shape of the glass substrate at the place where the transparent conductive sensor of the film substrate is attached is a quadratic curved surface. According to this characteristic configuration, the transparent conductive sensor of the film base is likely to follow the shape of the glass base, and defects such as wrinkles that are likely to occur when pasting are reduced. As a result, productivity at the time of bonding is improved.

本発明の第8の特徴構成は、中央部は平坦で外形部は立ち上がり形状のガラス基材の内側面に、透明導電膜層及び加飾印刷層が形成されたフィルム基材の透明導電センサを載置し、背面から弾性体のパッドでもって該フィルム基材を押圧して貼り付け形成することを特徴とする装飾付きタッチセンサの製造方法である。この特徴構成によると、弾性体のパッドが自由自在に変形するのでガラス基材の複雑な形状においても押圧を加えることができ、貼り合わせすることができる。   An eighth characteristic configuration of the present invention is a film-based transparent conductive sensor in which a transparent conductive film layer and a decorative print layer are formed on the inner surface of a glass substrate having a flat central portion and a rising outer shape. It is a manufacturing method of a touch sensor with decoration, characterized in that it is mounted and pressed and formed by pressing the film substrate with an elastic pad from the back. According to this characteristic configuration, since the elastic pad is freely deformed, it can be pressed even in a complicated shape of the glass substrate, and can be bonded together.

本発明の第9の特徴構成は、中央部は平坦で外形部は立ち上がり形状のガラス基材の内側面に、透明導電膜層及び加飾印刷層が形成されたフィルム基材の透明導電センサを載置し、背面から弾性体のロールを順次押圧しながら移動させることでもって該フィルム基材を押圧して貼り付け形成することを特徴とする装飾付きタッチセンサの製造方法である。この特徴構成によると、ロールが順次押圧しながら移動するので、単位時間あたりの貼り合わせ速度が向上し、貼り合わせ加工時の生産性が向上する。   A ninth characteristic configuration of the present invention is a film-based transparent conductive sensor in which a transparent conductive film layer and a decorative print layer are formed on the inner surface of a glass substrate having a flat central portion and an outer shape rising shape. It is a manufacturing method of a touch sensor with a decoration, wherein the film base is pressed and pasted by placing and moving an elastic roll from the back while sequentially pressing the roll. According to this characteristic configuration, since the roll moves while being sequentially pressed, the bonding speed per unit time is improved, and the productivity during the bonding process is improved.

以下、本発明に係る装飾付きタッチセンサの実施形態を図面に基づいて説明する。本発明の装飾付きタッチセンサ1は、中央部が平坦で外形部は立ち上がり形状のガラス基材2と該ガラス基材2の内側面に貼り付け形成された透明導電膜層4及び加飾印刷層5が形成された透明導電センサ3とからなる(図1,2,3)。   Hereinafter, embodiments of a touch sensor with decoration according to the present invention will be described with reference to the drawings. The touch sensor 1 with decoration of the present invention has a glass substrate 2 having a flat central portion and a rising outer shape, and a transparent conductive film layer 4 and a decorative print layer formed on the inner surface of the glass substrate 2. 5 is formed of the transparent conductive sensor 3 (FIGS. 1, 2, and 3).

ガラス基材2は、ソーダガラス、ホウケイ酸ガラス、アルミノケイ酸ガラスなどの強度及び透過率に優れるガラス板を選択する。強度に優れるガラス板を選択すると、ガラス基材2の厚みを薄くすることによる装飾付きタッチセンサ1の薄型化、ならびに、その装飾付きタッチセンサ1を備える携帯電話機やタブレット等の電子機器の薄型化を図ることができる。   As the glass substrate 2, a glass plate having excellent strength and transmittance such as soda glass, borosilicate glass, and aluminosilicate glass is selected. When a glass plate having excellent strength is selected, the touch sensor 1 with decoration is thinned by reducing the thickness of the glass substrate 2, and electronic devices such as mobile phones and tablets equipped with the touch sensor 1 with decoration are thinned. Can be achieved.

とくに化学強化したアルミノケイ酸ガラスは、他のガラスに比べて数倍の耐圧強度を持ち、厚みの薄いガラスでも強化できるという点でとくに好ましい。化学強化の方法としては、溶融したアルミノケイ酸ガラスを85重量%以上のカリウム塩、例えば硝酸カリウムを含有し、浴温度が300〜600℃の塩浴に、1〜15時間にわたって浸漬させて、ガラスに含まれるナトリウムイオンを放出させ、代わりにカリウムイオンを取り込ませる処理が挙げられる。   In particular, chemically strengthened aluminosilicate glass has a pressure strength several times that of other glasses, and is particularly preferable in that it can be strengthened even with thin glass. As a method of chemical strengthening, molten aluminosilicate glass contains 85 wt% or more of potassium salt, for example, potassium nitrate, and is immersed in a salt bath having a bath temperature of 300 to 600 ° C. for 1 to 15 hours. The process which discharge | releases the contained sodium ion and takes in potassium ion instead is mentioned.

ナトリウムイオンに比べてイオン半径が大きいカリウムイオンを取り込むことで、ガラス表面に圧縮応力がはたらき、強度を高めることができる。この浸漬処理により、厚さが約0.2mm、曲げ強度が500N/mm2程度の圧縮応力帯域が生成される。そして、ガラス板の外形部を立ち上がり形状に加工した後、このような化学強化を行ったガラス基材2では、平坦な中央部21だけでなく立ち上がり部22についても強度が大きく増している。したがって、このように化学強化されたガラス基材2では3mm以下の厚みのガラス板でもほぼ全体に十分な強度が得られるため、電子機器の薄膜化・軽量化を図ることができる。 By incorporating potassium ions having a larger ionic radius than sodium ions, compressive stress acts on the glass surface and the strength can be increased. By this immersion treatment, a compressive stress zone having a thickness of about 0.2 mm and a bending strength of about 500 N / mm 2 is generated. And in the glass base material 2 which performed such chemical strengthening after processing the external shape part of a glass plate, the intensity | strength has increased greatly not only about the flat center part 21, but the rising part 22. FIG. Therefore, in the glass substrate 2 chemically strengthened in this way, even a glass plate having a thickness of 3 mm or less can obtain a sufficient strength almost entirely, so that the electronic device can be made thinner and lighter.

なお、前記立ち上がり部22の形状は、立ち上がり部の高さ24が1〜5mmが好ましく、立ち上がり部の角のアール23は半径0.5〜5mmの形状になっていることが好ましい(図4)。立ち上がり部の高さ24が1mm未満であると狭額縁化が不十分となり、5mmより高いと貼り合わせが困難になるためである。また、立ち上がり部の角のアール23を半径0.5mm以上にすることで、該外形部の角に加わる外部からの衝撃が分散されガラス基材2が割れにくくなるだけでなく、貼り付けする透明導電センサ3が追随しやすくなり貼り合わせも容易になる長所がある。   As for the shape of the rising portion 22, the height 24 of the rising portion is preferably 1 to 5 mm, and the corner 23 of the corner of the rising portion has a radius of 0.5 to 5 mm (FIG. 4). . This is because when the height 24 of the rising portion is less than 1 mm, the narrowing of the frame is insufficient, and when it is higher than 5 mm, it becomes difficult to bond. Further, by setting the radius 23 of the corner of the rising portion to a radius of 0.5 mm or more, the impact from the outside applied to the corner of the outer shape portion is dispersed and the glass substrate 2 is not easily broken, and the transparent to be attached There is an advantage that the conductive sensor 3 can easily follow and can be attached easily.

つぎに、ガラス基材2に貼り付けする透明導電センサ3について説明する。透明導電センサ3は、フィルム基材6上に少なくとも透明導電膜層4及び加飾印刷層5が形成される。そして、加飾印刷層5は平坦なディスプレイ部25の額縁26としての機能だけでなく(図2、図3)、透明導電膜層4の電気信号を外部回路に伝達する引き回し回路7を覆い隠す機能も果たす。しかし、加飾印刷層5がガラス基材2の平坦な中央部21に形成されると、その分は電子機器のディスプレイ画面が小さくなることになるので、ガラス基材2の平坦な中央部21は透明導電膜層4で、立ち上がり部22は加飾印刷層5が主となるように位置決めしてガラス基材2の内側面に貼り付けする。   Next, the transparent conductive sensor 3 attached to the glass substrate 2 will be described. In the transparent conductive sensor 3, at least the transparent conductive film layer 4 and the decorative print layer 5 are formed on the film substrate 6. The decorative print layer 5 not only functions as the frame 26 of the flat display unit 25 (FIGS. 2 and 3), but also covers the routing circuit 7 that transmits the electrical signal of the transparent conductive film layer 4 to an external circuit. It also functions. However, when the decorative printing layer 5 is formed on the flat central portion 21 of the glass substrate 2, the display screen of the electronic device is reduced accordingly, so the flat central portion 21 of the glass substrate 2. Is the transparent conductive film layer 4, and the rising part 22 is positioned so that the decorative printing layer 5 is the main, and is affixed to the inner surface of the glass substrate 2.

貼り付け方法は、ガラス基材2の上に透明導電センサ3を載置し、背面から弾性体のパッド11でもって該フィルム基材6を押圧して貼り付けする方法が挙げられる(図5)。この方法では、弾性体のパッド11が自由自在に変形するのでガラス基材2の複雑な形状においても押圧を加えることができ、貼り合わせすることができる。また、ガラス基材2の立ち上がり形状が一方向の二次曲面(図3)であれば、弾性体のパッド11の代わりに弾性体のロール12を順次押圧しながら移動させることでもってフィルム基材6を押圧して貼り付け形成することもできる(図6)。この方法では、ロールが順次押圧しながら移動するので、高速で貼り合わせできるので生産性が向上する。なお、透明導電センサ3は沿いやすくするため予め少し曲げておくのが好ましい。   Examples of the attaching method include a method in which the transparent conductive sensor 3 is placed on the glass substrate 2 and the film substrate 6 is pressed and adhered from the back surface with the elastic pad 11 (FIG. 5). . In this method, since the elastic pad 11 is freely deformed, it is possible to apply pressure even in a complicated shape of the glass substrate 2 and to bond them together. Further, if the rising shape of the glass substrate 2 is a unidirectional quadratic curved surface (FIG. 3), the film substrate can be moved by sequentially pressing and moving the elastic roll 12 instead of the elastic pad 11. 6 can be pressed and formed (FIG. 6). In this method, since the rolls are moved while being sequentially pressed, the bonding can be performed at a high speed, so that productivity is improved. It is preferable that the transparent conductive sensor 3 be bent a little in advance in order to make it easier to follow.

貼り付けは、粘着性で光学的に透明性の高い光学透明両面テープ(OCA)やや感圧性の接着剤が形成されたテープ(PSA)などを介して行うとよい。主に用いる接着剤の材質としてはポリメタクリル酸系である。弾性体のパッド11としては、硬度45〜60程度のシリコンゴムからなるパッドが挙げられる。弾性体のロール12としては、硬度60〜90程度のシリコンゴムからなるロールが挙げられる。押圧力は0.5〜2MPa程度に設定するとよい。   Affixing may be performed via an optically transparent double-sided adhesive tape (OCA) that is highly adhesive and optically transparent, or a tape (PSA) on which a pressure-sensitive adhesive is formed. The main adhesive material is polymethacrylic acid. Examples of the elastic pad 11 include pads made of silicon rubber having a hardness of about 45-60. Examples of the elastic roll 12 include a roll made of silicon rubber having a hardness of about 60 to 90. The pressing force is preferably set to about 0.5 to 2 MPa.

透明導電センサ3の透明導電膜層4の材質としては、一般的に、酸化スズ、酸化インジウム、酸化アンチモン、酸化亜鉛、酸化カドミウム、インジウムスズ酸化物(ITO)などの金属酸化物を用いることができる。ただし本発明では、透明導電膜層4の一部が立ち上がり部22にまで追随して形成される場合もあるので、これらの金属酸化物よりもよりフレキシブルな材質で形成した方が好ましい。   As a material of the transparent conductive film layer 4 of the transparent conductive sensor 3, generally, a metal oxide such as tin oxide, indium oxide, antimony oxide, zinc oxide, cadmium oxide, indium tin oxide (ITO) is used. it can. However, in the present invention, a part of the transparent conductive film layer 4 may be formed so as to follow the rising portion 22, and therefore, it is preferable that the transparent conductive film layer 4 is formed of a more flexible material than these metal oxides.

そのようなフレキシブルな透明導電膜層4としては、金、銀、銅、スズ、ニッケル、アルミニウム、パラジウムなどの導体金属やカーボンからなる極細線の導体繊維(すなわち金属ナノファイバーまたは金属ナノワイヤやカーボンナノチューブ)を含有させた透明導電膜や、金、銀、銅、スズ、ニッケル、アルミニウム、パラジウムなどの導体金属を目視で確認できない程度の細線でパターン化または自己組織化して形成させて、外観上透明に見えるようにした透明導電膜、PEDOT(ポリエチレンジオキシチオフェン)などのチオフェン系導電ポリマーからなる透明導電膜などが挙げられる。   As such a flexible transparent conductive film layer 4, a conductor metal such as gold, silver, copper, tin, nickel, aluminum, palladium or a very fine conductor fiber made of carbon (that is, metal nanofiber, metal nanowire, or carbon nanotube). ) And conductive metal such as gold, silver, copper, tin, nickel, aluminum, palladium, etc. are formed by patterning or self-organizing with thin wires that cannot be visually confirmed, and transparent in appearance And a transparent conductive film made of a thiophene-based conductive polymer such as PEDOT (polyethylenedioxythiophene).

極細線の導体繊維は、断面の直径が10〜200nm、アスペクト比が10〜100000のものが光学特性・導電性の点から好ましい。該導体繊維を透明バインダーに含有させてインキ化し汎用の印刷方式にてパターン形成する方法や、全面クリアコートしてリフトオフによりパターン形成する方法などにより、透明導電膜層4をパターン形成することができる。   The ultrafine conductor fiber preferably has a cross-sectional diameter of 10 to 200 nm and an aspect ratio of 10 to 100,000 from the viewpoint of optical properties and conductivity. The transparent conductive film layer 4 can be patterned by a method in which the conductive fiber is contained in a transparent binder to form an ink by a general-purpose printing method, a method of forming a pattern by clear coating and forming a pattern by lift-off, or the like. .

目視で確認できない程度の導体金属によるパターンとしては、線幅が100μm以下で開口率(単位面積あたりの導体金属パターンが形成されない比率)が90%以上の格子状パターンやハニカム状のパターンが挙げられる。このパターンはリフトオフやエッチングなどの方法により形成される。あるいは、疎水性溶媒系の溶液キャスト製膜法と水蒸気結露現象を組み合わせた自己組織化による方法で上記パターンを形成してもよいし、銀塩写真技術でもってパターンを形成してもよい。   Examples of the conductive metal pattern that cannot be visually confirmed include a lattice pattern or a honeycomb pattern having a line width of 100 μm or less and an aperture ratio (a ratio in which a conductive metal pattern per unit area is not formed) of 90% or more. . This pattern is formed by a method such as lift-off or etching. Alternatively, the pattern may be formed by a self-organization method combining a hydrophobic solvent-based solution cast film forming method and water vapor condensation phenomenon, or the pattern may be formed by a silver salt photographic technique.

透明導電膜層4に十分な導電性があれば、それをそのまま外部回路と接続するための端子部まで形成することができる。ただ、一般的に透明性と導電性は相反する関係にあるため、ディスプレイ部分以外は、電気信号を円滑に伝達するための引き回し回路7を別途形成する方が好ましい。引き回し回路7は銀ペーストなどの導電インキを汎用の印刷方式で形成したり、銅箔などの導体金属をリフトオフやエッチングなどの方法で形成したりするのが一般的である。   If the transparent conductive film layer 4 has sufficient conductivity, it can be formed as it is to the terminal portion for connecting to an external circuit. However, since transparency and conductivity are generally in a contradictory relationship, it is preferable to separately form a routing circuit 7 for smoothly transmitting an electric signal except for the display portion. The routing circuit 7 is generally formed by forming a conductive ink such as silver paste by a general-purpose printing method, or by forming a conductive metal such as a copper foil by a method such as lift-off or etching.

そして、この引き回し回路7を覆い隠すとともに、平坦なディスプレイ部25の額縁26としての機能を果たす加飾印刷層5を形成する。加飾印刷層5は、中央部が抜きパターンで、その周縁が額縁状のパターンになるように形成されている。中央部の抜きパターンの広さや形状は、電子機器における入力エリアや表示エリアの広さや形状に応じて設定されるが、ガラス基材2の平坦な中央部21と同等にするのが好ましい。そのようにすることにより、ガラス基材2に透明導電センサ3を貼り合わせた際、加飾印刷層5は側面の立ち上がり部22に形成され、平坦な中央部21は殆ど透明導電膜層4からなる入力エリアとなり、究極の狭額縁化が可能となるからである。   Then, the decorative printed layer 5 that covers the routing circuit 7 and functions as the frame 26 of the flat display unit 25 is formed. The decorative print layer 5 is formed so that the central portion has a blank pattern and the peripheral edge has a frame-like pattern. The width and shape of the punched pattern at the center are set according to the width and shape of the input area and display area in the electronic device, but are preferably equal to the flat center 21 of the glass substrate 2. By doing so, when the transparent conductive sensor 3 is bonded to the glass substrate 2, the decorative printing layer 5 is formed on the rising portion 22 on the side surface, and the flat central portion 21 is almost from the transparent conductive film layer 4. This is because it becomes an input area, and the ultimate narrowing of the frame becomes possible.

加飾印刷層5は、ポリビニル系樹脂、ポリアミド系樹脂、ポリエステル系樹脂、ポリアクリル系樹脂、ポリウレタン系樹脂、ポリビニルアセタール系樹脂、ポリエステルウレタン系樹脂、アルキド樹脂などをバインダーとし、適切な色の顔料または染料を着色剤として含有する着色インキを用いるとよい。形成方法は、スクリーン印刷、オフセット印刷、グラビア印刷、フレキソ印刷などの通常印刷法などを用いるとよい。該印刷層の厚みは0.5〜10μm程度とするのが一般的である。   The decorative print layer 5 is made of a polyvinyl resin, a polyamide resin, a polyester resin, a polyacrylic resin, a polyurethane resin, a polyvinyl acetal resin, a polyester urethane resin, an alkyd resin, etc. Alternatively, a colored ink containing a dye as a colorant may be used. As a forming method, a normal printing method such as screen printing, offset printing, gravure printing, or flexographic printing may be used. The thickness of the printing layer is generally about 0.5 to 10 μm.

また加飾印刷層5は、金属薄膜層からなるものあるいは金属薄膜層と上記印刷層との組み合わせからなるものでもよい。金属薄膜層は金属光沢を表現するものであり、真空蒸着法、スパッタリング法、イオンプレーティング法、鍍金法などにより形成される。この場合、表現したい金属光沢色に応じて、アルミニウム、ニッケル、金、白金、クロム鉄、銅、スズ、インジウム、銀、チタニウム、鉛、亜鉛などの金属、これらの合金または化合物を使用できる。金属薄膜層の厚みは0.05μm程度とするのが一般的である。また、金属薄膜層を設ける際に、他の層との密着性を向上させるために前アンカー層や後アンカー層を設けてもよい。   The decorative print layer 5 may be a metal thin film layer or a combination of the metal thin film layer and the print layer. The metal thin film layer expresses metallic luster and is formed by a vacuum deposition method, a sputtering method, an ion plating method, a plating method, or the like. In this case, metals such as aluminum, nickel, gold, platinum, chromium iron, copper, tin, indium, silver, titanium, lead, and zinc, and alloys or compounds thereof can be used depending on the metallic luster color to be expressed. The thickness of the metal thin film layer is generally about 0.05 μm. Moreover, when providing a metal thin film layer, in order to improve adhesiveness with another layer, you may provide a front anchor layer and a rear anchor layer.

透明導電センサ3のフィルム基材6は、ポリカーボネート系、シクロオレフィン系、アクリル系、ポリエチレンテレフタレート系、ポリブチレンテレフタレート系などの樹脂フィルムを使用することができる。フィルム基材の厚みは30〜500μm程度とするのが一般的である。なお、ここでいうフィルム基材とは、JIS K‐7171の試験装置でもって曲げ試験をした際、曲げ半径が5cmのときの曲げ応力が150MPa未満の曲げ特性を有する基材であれば上記樹脂フィルム以外の材質でもよく、例えば厚み50〜100μmの無アルカリホウケイ酸ガラスのように上記樹脂フィルムに匹敵するような曲げ特性を有するフレキシブルな基材も含まれる。   As the film substrate 6 of the transparent conductive sensor 3, a resin film such as polycarbonate, cycloolefin, acrylic, polyethylene terephthalate, or polybutylene terephthalate can be used. The thickness of the film substrate is generally about 30 to 500 μm. The film substrate referred to here is the above resin as long as the substrate has a bending characteristic with a bending stress of less than 150 MPa when the bending radius is 5 cm when a bending test is performed with a test apparatus of JIS K-7171. A material other than the film may be used. For example, a flexible base material having bending characteristics comparable to the resin film, such as non-alkali borosilicate glass having a thickness of 50 to 100 μm, is also included.

なお、以上に示した透明導電センサ3は、透明導電膜層4が単層の場合であるが、透明導電膜層4がフィルム基材6の表裏両面に形成されていても良い。あるいは、透明導電膜層4が形成されているフィルム基材6が複数積層形成されていてもよい。透明導電膜層4が複数層形成された静電容量式透明導電センサの場合、マルチタッチ入力などが円滑に行える長所がある。また、各図では透明導電膜層4、加飾印刷層5、引き回し回路7がフィルム基材6のガラス基材2と反対側の面で示しているが、各層をフィルム基材6のガラス基材2の面側に形成してもよい。
In addition, although the transparent conductive sensor 3 shown above is a case where the transparent conductive film layer 4 is a single layer, the transparent conductive film layer 4 may be formed on both front and back surfaces of the film substrate 6. Alternatively, a plurality of film bases 6 on which the transparent conductive film layer 4 is formed may be laminated. In the case of a capacitive transparent conductive sensor in which a plurality of transparent conductive film layers 4 are formed, there is an advantage that multi-touch input and the like can be performed smoothly. Moreover, although each figure has shown the transparent conductive film layer 4, the decorative printed layer 5, and the drawing circuit 7 in the surface on the opposite side to the glass base material 2 of the film base material 6, each layer is shown by the glass base of the film base material 6. It may be formed on the surface side of the material 2.

本発明の装飾付きタッチセンサの一例を示す断面図である。It is sectional drawing which shows an example of the touch sensor with a decoration of this invention. 本発明の装飾付きタッチセンサの一例を示す斜視図である。It is a perspective view which shows an example of the touch sensor with a decoration of this invention. 本発明の装飾付きタッチセンサの他の一例を示す斜視図である。It is a perspective view which shows another example of the touch sensor with a decoration of this invention. 本発明に使用するガラス基材の断面図である。It is sectional drawing of the glass base material used for this invention. ガラス基材に透明導電センサを載置し、背面から弾性体のパッドでもって貼り付け形成する方法の説明図である。It is explanatory drawing of the method of mounting a transparent conductive sensor on a glass base material, and sticking and forming with a pad of an elastic body from the back surface. ガラス基材に透明導電センサを載置し、背面から弾性体のロールでもって貼り付け形成する方法の説明図である。It is explanatory drawing of the method of mounting a transparent conductive sensor on a glass base material, and sticking and forming with the roll of an elastic body from a back surface.

1 装飾付きタッチセンサ
2 ガラス基材
3 透明導電センサ
4 透明導電膜層
5 加飾印刷層
6 フィルム基材
7 引き回し回路
11 弾性体のパッド
12 弾性体のロール
21 平坦な中央部
22 立ち上がり部
23 立ち上がり部の角のアール
24 立ち上がり部の高さ
25 平坦なディスプレイ部
26 額縁
DESCRIPTION OF SYMBOLS 1 Touch sensor with decoration 2 Glass base material 3 Transparent conductive sensor 4 Transparent conductive film layer 5 Decorative printing layer 6 Film base material 7 Drawing circuit 11 Elastic pad 12 Elastic roll 21 Flat center part 22 Rising part 23 Rising Corner of the corner 24 height of the rising part 25 flat display part 26 picture frame

Claims (9)

中央部は平坦で外形部は立ち上がり形状の基材の内側面に、透明導電膜層及び加飾印刷層が形成されたフィルム基材の透明導電センサを載置し、背面から弾性体のパッドでもって該フィルム基材を押圧して貼り付け形成する、装飾付きタッチセンサの製造方法。Place the transparent conductive sensor of the film base on which the transparent conductive film layer and the decorative print layer are formed on the inner surface of the base material where the central part is flat and the outer shape is a rising shape. A method of manufacturing a touch sensor with decoration, wherein the film substrate is pressed and pasted. 中央部は平坦で外形部は立ち上がり形状の基材の内側面に、透明導電膜層及び加飾印刷層が形成されたフィルム基材の透明導電センサを載置し、背面から弾性体のロールを順次押圧しながら移動させることでもって該フィルム基材を押圧して貼り付け形成する、装飾付きタッチセンサの製造方法。A transparent conductive sensor of a film base material on which a transparent conductive film layer and a decorative print layer are formed is placed on the inner surface of a base material having a flat central portion and an upright shape, and an elastic roll is applied from the back side. A method for manufacturing a touch sensor with a decoration, wherein the film base material is pressed and bonded by being moved while being sequentially pressed. 請求項1または請求項2に記載の装飾付きタッチセンサの製造方法に用いる透明導電センサ。The transparent conductive sensor used for the manufacturing method of the touch sensor with a decoration of Claim 1 or Claim 2. 前記透明導電膜層が、導電繊維を含む、請求項3に記載の透明導電センサ。The transparent conductive sensor according to claim 3, wherein the transparent conductive layer includes conductive fibers. 前記透明導電膜層が、チオフェン系導電ポリマーを含む、請求項3に記載の透明導電センサ。The transparent conductive sensor according to claim 3, wherein the transparent conductive film layer contains a thiophene-based conductive polymer. 前記透明導電膜層が、微細なメッシュパターン化させた金属膜からなる、請求項3に記載の透明導電センサ。The transparent conductive sensor according to claim 3, wherein the transparent conductive film layer is made of a metal film having a fine mesh pattern. 前記透明導電膜層が、自己組織化させた金属微粒子パターンからなる、請求項3に記載の透明導電センサ。The transparent conductive sensor according to claim 3, wherein the transparent conductive film layer comprises a self-organized metal fine particle pattern. 請求項1または請求項2に記載の装飾付きタッチセンサの製造方法に用いる基材であって、該基材がアルミノケイ酸ガラスであり、外形部の立ち上がり形状を形成した後、化学処理を行って強度を向上させた化学強化ガラスである、基材。It is a base material used for the manufacturing method of the touch sensor with a decoration of Claim 1 or Claim 2, Comprising: This base material is an aluminosilicate glass, After forming the standing shape of an external part, it performs a chemical treatment. A base material that is chemically strengthened glass with improved strength. 前記基材の形状が二次曲面である、請求項8に記載の基材。The substrate according to claim 8, wherein the shape of the substrate is a quadratic curved surface.
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