TW201342153A - Electrode staking body of transparent touch panel - Google Patents

Abstract

Provided is a see-through touch panel electrode stack which is capable of forming a large see-through wire of low electrical resistance using a first electrode formation substrate and a second electrode formation substrate which are of low specific resistance, which has excellent shock resistance and for which a transparent substrate can be easily recycled. The see-through touch panel electrode stack is formed by stacking a transparent substrate (1), a first heat-seal film (2), a first electrode formation substrate (3) upon which a first electrode (30) has been formed, a second heat-seal film (4), and a second electrode formation substrate (5) upon which has been formed a second electrode (50) which is non-parallel to the first electrode (30) in the above-mentioned order. The first electrode (30) and the second electrode (50) are configured with a metal wire (6) of conductor width which is less than or equal to 30 mum.

Description

Perspective touch panel electrode stack

The present invention relates to a see-through touch panel electrowinning laminate applied to a touch panel.

A conventional touch panel or the like is formed of a transparent touch panel electrode laminate formed of a display electrode (see, for example, Patent Document 1). Fig. 6 is a view showing an example of a conventional transparent touch panel electrode laminate A. However, the transparent touch panel electrode laminate A is formed by forming the transparent substrate 1, the first adhesive layer 11, and the first electrode. The base material 3, the second adhesive layer 12, and the second electrode forming substrate 15 are laminated in this order, and the third adhesive layer 13 is interposed between the transparent substrate 1, and the laminated functional film 9 is laminated.

Here, the first adhesive layer 11, the second adhesive layer 12, and the third adhesive layer 13 are each a layer formed by hardening a liquid adhesive. In particular, the first adhesive layer 11 and the second adhesive layer 12 are usually formed of a pressure-sensitive adhesive adhesive having a viscosity.

Further, the first electrode forming substrate 3 is an ITO electrode 14 having a linear X-axis direction (an electrode formed of a mixture of indium oxide and indium oxide) (indium tin oxide). The substrate 7 is formed. On the other hand, when the second electrode is formed in the substrate 5, when viewed in the lamination direction (Z-axis direction), the ITO electrode 14 having the linear shape in the Y-axis direction is orthogonal to the ITO electrode 14 of the first electrode-forming substrate 3, and a plurality of parallel Set at A transparent substrate 7 is formed.

The functional film 9 is, for example, a reflection preventing film or the like.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2011-44145

However, in the conventional see-through touch panel electrode laminate A, the ITO electrode 14 formed on the first electrode forming substrate 3 and the second electrode forming substrate 5 has a higher specific resistance value, and therefore is longer than about 30 cm. The wiring will not flow into the required amount of power. Therefore, when such a transparent touch panel electrode laminate A is applied to, for example, an electrode sensor such as a resistive touch panel, there is a problem in that it is impossible to detect a contact portion such as a finger touch, which is liable to cause malfunction.

Further, in the method for manufacturing the transparent touch panel electrode laminate A of the related art, as described above, in particular, the first adhesive layer 11 and the second adhesive layer 12 are formed of a pressure-sensitive adhesive, but even When the adhesive is hardened, there is a problem that the toughness is low and the strength is insufficient, and the impact resistance of the transparent touch panel electrode laminate A is low.

Further, even if the transparent substrate 1 is taken out from the perspective touch panel electrode stack A which has exceeded the life for recycling, the cured liquid adhesive is strongly adhered to the transparent substrate 1, and the result is incinerated perspective touch. The panel electrode assembly A is entirely unrepeatable.

The present invention has been made in view of the above, and an object of the invention is to provide a first electrode forming substrate and a second electrode forming substrate having a lower specific resistance, and to form a large transparent wiring having low electrical impedance. A transparent touch panel electrode laminate which is excellent in impact resistance and which can easily reproduce a transparent substrate.

A transparent touch panel electrode laminate according to the present invention, comprising: a transparent substrate, a first heat-fusible film, a first electrode-forming substrate forming a first electrode, a second heat-fusible film, and the first electrode; The second electrode forming substrate of the non-parallel second electrode is formed by laminating in this order, and the first electrode and the second electrode are formed of a metal wiring having a conductor width of 30 μm or less.

In the transparent touch panel electrode laminate, the haze in the lamination direction is preferably 15% or less.

In the transparent touch panel electrode laminate, the total light transmittance in the stacking direction is preferably 50% or more.

In the above-mentioned transparent touch panel electrode laminate, the first heat-fusible film and the second heat-fusible film are composed of a polyethylene-vinyl acetate copolymer and an amorphous polyethylene terephthalate homopolymer. A group of amorphous polyethylene terephthalate copolymer, polyvinyl butyral polymer, and polyvinyl butyral copolymer is preferably selected.

In the above-described transparent touch panel electrode laminate, the transparent substrate is preferably formed of glass.

In the transparent touch panel electrode laminate, the transparent substrate is made of a polyester resin, an acrylic resin, an ornidene resin, an olefin maleimide resin, an epoxy resin, or a polyurethane resin. It is preferred that the mixture of the resins is selected from the group.

According to the present invention, the base material and the second electrode forming substrate can be formed using the first electrode having a lower specific resistance, and a large transparent wiring having low electrical resistance can be formed, which has excellent impact resistance and can make the transparent substrate easy. Recycling.

Embodiments of the present invention will be described below.

The see-through touch panel electrode laminate A of the present invention is suitable for a touch panel having a diagonal length of more than 15 吋 (38.1 cm) for a rectangular or polygonal screen. The upper limit of the diagonal length is about 200 吋 (508 cm). As such a transparent touch panel electrode laminate A, as the constituent member, a transparent substrate 1, a first heat-fusible film 2, a first electrode-forming substrate 3, a second heat-fusible film 4, and a second electrode-forming substrate can be used. 5 is formed. Each of the constituent members has a size corresponding to the screen (at least the same as the screen size of the touch panel). Further, as shown in FIGS. 1A and 1B, the transparent touch panel electrode laminate A has the transparent substrate 1, the first heat-fusible film 2, the first electrode-forming substrate 3, and the second heat-fusible film 4, The second electrode-forming substrate 5 is laminated in this order. As shown in Figure 1C, it can also be used in transparent bases. The board 1 is laminated with the functional film 9 via the adhesive layer 8. In this case, when the transparent touch panel electrode laminate A is manufactured, the flexible substrate 1 may be laminated on the transparent substrate 1 with the adhesive layer 8 interposed therebetween, thereby producing a transparent substrate with a functional film.

The layers forming the respective constituent members will be described below.

As the transparent substrate 1, for example, it can be formed using glass, plastic, or the like. As the glass, for example, semi-reinforced glass, tempered glass, or the like can be used. As the plastic, for example, a polyester resin, an acrylic resin, an ornidene resin, an olefin maleimide resin, an epoxy resin, a polyurethane resin, or a mixture of these resins can be used. The resin or the like is formed. The thickness of the transparent substrate 1 is preferably 0.5 to 6.0 mm, and more preferably 1.2 to 4.0 mm from the viewpoint of ease of handling and weight reduction. Although FIG. 2C shows an example of the shape and size of the transparent substrate 1, it is of course not limited thereto.

As the first heat-fusible film 2 and the second heat-fusible film 4, the same heat-fusible film or a different heat-fusible film can be used. The heat-fusible film is, for example, in the form of a film at -10 to 40 ° C, and is in the range of 60 to 300 ° C. When plastic is used as the transparent substrate 1 , it is preferably heated at a temperature of 60 to 180 ° C to slowly soften or melt the adhesive. The adjacent layers are transparent once hardened, and are not particularly limited. Specifically, the first heat-fusible film 2 and the second heat-fusible film 4 are composed of a polyethylene-vinyl acetate copolymer, an amorphous polyethylene terephthalate homopolymer, and an amorphous polyparaphenyl. It is preferred to form a group of the ethylene dicarboxylate copolymer, the polyvinyl butyral polymer, and the polyvinyl butyral copolymer. The film and other material shapes Compared with the formed film, the toughness is particularly high and sufficient strength can be obtained, so that the transparent touch panel electrode laminate A can obtain excellent impact resistance. Further, if the film is used in the case where the transparent substrate 1 is glass, when the glass is broken, the glass shards can be held in the film to suppress scattering of the chips. A film formed of a polyethylene-vinyl acetate copolymer, also referred to as an EVA film, and a film formed of an amorphous polyethylene terephthalate copolymer is also referred to as PET-G.

Further, it is preferable that the first heat-fusible film 2 and the second heat-fusible film 4 have a thickness of 10 to 400 μm, and the resin of each of the welded films may soften or melt and ooze out from the end surface of the laminate due to the ease of handling. Therefore, 50~200mm is better. The first heat-fusible film 2 and the second heat-fusible film 4 have a thickness of 10 μm or more, whereby the heat-fusible films can exhibit sufficient adhesion performance. Further, the thickness of the first heat-fusible film 2 and the second heat-fusible film 4 is 400 μm or less, whereby the deflection of the transparent touch panel electrode laminate A can be suppressed. Although FIG. 2C shows an example of the shape and size of the first heat-fusible film 2 and the second heat-fusible film 4, it is of course not limited thereto.

Further, as the first electrode forming substrate 3, for example, as shown in FIG. 2A, the first electrode 30 may be formed on the surface of the transparent substrate 7. The first electrode 30 is provided on the transparent substrate 7 in a plurality of linear patterns in a direction parallel to the X-axis (horizontal axis) in the second drawing, but is not limited to such a striped pattern. Each of the first electrodes 30 is formed of a metal wiring 6 having a conductor width (L) of 30 μm or less (lower limit: 0.1 μm). Specifically, in each of the first electrodes 30, the linear metal wires 6 in the second AA are arranged in parallel with the X-axis direction. However, the first electrodes 30 may be in the form of FIG. 4A, and the metal wires 6 may be in the mesh. Configuration configuration. As described above, the wiring pattern of the metal wiring 6 is not particularly limited in each of the first electrodes 30. On the other hand, the bias angle of the mesh-shaped metal wiring 6 in FIG. 4A is about 45 degrees in the X-axis direction, but the angle is not limited thereto. The conductor spacing (P) is, for example, 0.05 to 10 mm. At this time, a conductor pitch (P) comprising: a metal wiring conductor spacing of 6 (P ₀₎ and the spacing between the conductors 30 of the first electrode (P _1). Further, as shown in FIGS. 3A and 5A, the first terminal portions 31 are provided at both end portions of the respective first electrodes 30. The first terminal portion 31 has a rectangular shape of, for example, 2 mm × 5 mm, and is electrically connected to an external wiring (not shown).

Further, as the second electrode forming substrate 5, for example, as shown in FIG. 2B, the second electrode 50 may be formed on the surface of the transparent substrate 7. In the second electrode 50, when viewed from the stacking direction (Z-axis direction) (see FIG. 2D), the plurality of lines orthogonal to the first electrode 30 of the first electrode-form substrate 3 are parallel to the second electrode 50. The Y-axis (vertical axis) direction is provided on the transparent substrate 7, but is not limited to such a stripe pattern shape. In short, the second electrode 50 may be non-parallel to the first electrode 30. Each of the second electrodes 50 is formed of a metal wiring 6 having a conductor width (L) of 30 μm or less (lower limit: 0.1 μm). Specifically, each of the second electrodes 50 is formed by arranging a plurality of linear metal wires 6 in parallel in FIG. 2B in parallel. However, each of the second electrodes 50 may be arranged in a mesh shape as in FIG. 4B. As described above, the arrangement pattern of the metal wirings 6 in each of the second electrodes 50 is not particularly limited. On the other hand, the bias angle of the mesh-shaped metal wiring 6 in FIG. 4B is about 90° in the X-axis direction, but the angle is not limited thereto. The conductor spacing (P) is, for example, 0.05 to 10 mm. At this time, a conductor pitch (P) comprising: a metal wiring conductor spacing of 6 (P ₀₎ and a second electrode conductor pitch (P ₂₎ 50 between. Further, as shown in FIGS. 3B and 5B, second terminal portions 51 are provided at both end portions of the respective second electrodes 50. The second terminal portion 51 is, for example, a rectangular shape having a size of 5 mm × 2 mm, and is electrically connected to an external wiring (not shown).

Further, as the transparent substrate 7 which is a material of the first electrode forming substrate 3 and the second electrode forming substrate 5, for example, polycarbonate (PC), polymethylmethacrylate (PMMA), ethylene terephthalate can be used. A film made of a formate (PET), such derivatives, a composite polymer, a segment polymer, a composite, or the like. The thickness of the transparent substrate 7 is preferably 15 to 300 μm, and more preferably 50 to 200 μm from the viewpoint of being difficult to bend and reduce the weight during processing.

In addition, the first electrode forming base material 3 and the second electrode forming base material 5 are laminated on the metal foil formed by laminating a metal foil (thickness: 1 to 400 μm) such as copper foil on the surface of the transparent base material 7. The board is manufactured using a photolithography method or the like. Further, a metal layer (thickness: 0.01 to 10 μm) such as a copper layer is formed on the surface of the transparent substrate 7 by vapor deposition or sputtering, and then a photolithography method or the like is used, or a conductive solder is applied to the transparent substrate at a thickness of 0.01 to 10 μm. The surface of the material 7 is fired (baking temperature: 80 to 200 ° C), whereby the first electrode forming substrate 3 and the second electrode forming substrate 5 can be produced. The first electrode forming substrate 3 and the second electrode forming substrate 5 obtained as described above are provided on the transparent substrate 7 because the first electrode 30 and the second electrode 50 having a very small specific resistance are provided in comparison with the conventional ITO electrode. Therefore, it is possible to easily increase the size of the transparent touch panel electrode stack A.

As the adhesive for forming the adhesive layer 8, for example, a feeling of use can be used. PSA (Pressure Sensitive Adhesive) and the like. The thickness of the adhesive layer 8 is preferably from 1 to 200 μm, and more preferably from 10 to 100 μm from the viewpoint of ease of formation and weight reduction. Although the shape and size of the adhesive layer 8 are shown in FIG. 2C, it is not limited to this.

The functional film 9 is not particularly limited as long as it can impart various functions to the transparent touch panel electrode laminate A. For example, an anti-reflection film (AR (Anti-Reflection) film) or an anti-glare film (AG (Anti) can be used. -Glare) film, fingerprint-resistant film (AF (Anti-Fingerprint) film), and the like. The thickness of the functional film 9 is preferably 15 to 300 μm, and more preferably 50 to 200 μm from the viewpoint of being difficult to bend and reduce the weight during handling. Further, although an example of the shape and size of the functional film 9 is shown in FIG. 2C, it is of course not limited thereto.

Further, as shown in FIG. 1A, the transparent substrate 1, the first thermal adhesive film 2, the first electrode forming substrate 3, the second thermal adhesive film 4, and the second electrode forming substrate 5 are laminated in this order. After heating at a temperature of 1 to 120 minutes and 60 to 160 ° C, and pressurizing at a pressure of 0.1 to 3000 kPa (0.001 to 30.6 kgf/cm ² ) in the lamination direction, it is allowed to cool for 0.001 to 60 minutes to room temperature. A see-through touch panel electrode laminate A as shown in Fig. 1B was produced. As described above, when the transparent touch panel electrode laminate A is manufactured, the first heat-fusible film 2 and the second heat-fusible film 4 which are slowly softened or melted by heating and pressing are respectively disposed on the transparent substrate 1 and the first Between the electrode forming substrates 3 and between the first electrode forming substrate 3 and the second electrode forming substrate 5, strong toughness is obtained, and when the transparent substrate 1 is broken, scattering of the chips can be suppressed.

Then, the adhesive layer is placed in a state in which an adhesive is interposed between the transparent substrate 1 and the functional film 9, whereby the transparent touch panel electrode laminate A as shown in FIG. 1C can be manufactured. At this time, a transparent substrate with a functional film can also be used as described above.

In the transparent touch panel electrode laminate A obtained as described above, the haze (HAZE) in the lamination direction (Z-axis direction) is preferably 15% or less (lower limit: 0.5%). In particular, the turbidity is 15% or less, whereby the blurring of the screen of the touch panel can be suppressed. Further, the total light transmittance (TT) in the stacking direction (Z-axis direction) is preferably 50% or more (upper limit: 98%). In particular, the total light transmittance is 50% or more, whereby the darkness of the touch panel can be suppressed from being operated. When the turbidity is 15% or less or the total light transmittance is 50% or more, the visibility of the image displayed behind the touch panel can be improved.

Further, in the transparent touch panel electrode laminate A obtained as described above, the base material 3 and the second electrode forming substrate 5 can be formed using the first electrode having a lower specific resistance, and a large transparent wiring having low electric resistance can be formed. It is very suitable for use as an electrode of a touch panel. The first heat-fusible film 2 and the second heat-fusible film 4 having high toughness also have excellent impact resistance as compared with the conventional hardened liquid adhesive.

Further, the transparent substrate 1 is a group of a mixture of glass, a polyester resin, an acrylic resin, a norbornene resin, an olefin maleimide resin, an epoxy resin, a polyurethane resin, or a mixture of these resins. In the case where the middle substrate is formed, when the transparent substrate 1 is broken, the fragment can be mainly held by the first heat-fusible film 2, and the fragment is prevented from scattering. In particular, the fragment scattering suppression effect, at least the first heat-fusible film 2 is made of polyethylene-vinyl acetate Copolymer, amorphous polyethylene terephthalate homopolymer, amorphous polyethylene terephthalate copolymer, polyvinyl butyral polymer, polyvinyl butyral It is obvious in the case where the formation of the copolymer is selected.

The first heat-fusible film 2 and the second heat-fusible film 4 are different from the conventional pressure-sensitive adhesive, and do not require an etching time. Therefore, the transparent touch panel electrode laminate A can be manufactured at low cost. Further, in the case of a pressure-sensitive adhesive, a mixture obtained by mixing a main component and a curing agent is applied to a release film to produce an adhesive film. It is hardened to the extent that it can be wound up by the roller at the time of coating. However, the main agent and the hardener are not completely reacted at this stage, so it is left at a temperature of about room temperature to about 60 ° C for 2 to 10 days. Its complete reaction is complete. This period of placement is referred to as the period of degradation.

Moreover, the first heat-fusible film 2 and the second heat-fusible film 4 cause a decrease in the adhesion force under high temperature and high humidity. Therefore, the transparent touch panel electrode laminate A which exceeds the life is only required to have a temperature of 95 to 150 ° C and a relative humidity of 60. The high-temperature and high-humidity treatment under the condition of ~99% RH enables the cured first heat-fusible film 2 to be cleanly peeled off from the transparent substrate 1, and the transparent substrate 1 can be easily reused.

[Examples]

Hereinafter, the present invention will be specifically described by way of examples.

(Example 1) [Transparent substrate with functional film]

As the transparent substrate 1, soda glass having a thickness of 3.2 mm was used.

As the functional film 9, a film formed of a film of a PET film (thickness: 100 μm) and an adhesive layer 8 (having a thickness of 25 μm) on the other surface ("F300" manufactured by Sumitomo Osaka Cement Co., Ltd.) is attached. Block UV function, turbidity 0.65%).

Further, the transparent substrate 1 is laminated with the adhesive film 8 interposed with the adhesive film 9 to form a transparent substrate with a functional film.

[First electrode forming substrate and second electrode forming substrate]

As the first electrode forming substrate 3, as shown in Fig. 2A, a strip-shaped first electrode 30 (linear metal wiring 6 having a thickness of 12 μm, a conductor width (L) of 30 μm, and a conductor pitch (P ₀ ) of 2 mm) was used. A substrate formed on the surface of a PET film ("COSMOSHINE A4300" manufactured by Toyobo Co., Ltd., thickness: 100 μm) of the transparent substrate 7 was interposed with a transparent adhesive layer (thickness: 7 μm). The conductor pitch (P ₁ ) between the first electrodes 30 is 2 mm. The transparent adhesive layer is a main agent (DAINAREO VA-3020 manufactured by Toyo Ink Co., Ltd.) and a hardener (DAINAREO HD-701 manufactured by Toyo Ink Co., Ltd.) as a main component/hardener (weight). The transparent adhesive obtained by mixing in a ratio of 100/7 was formed by coating with a coating amount of 3 g/m ² .

As the second electrode-forming substrate 5, as shown in FIG. 2B, the use of the strip-shaped second electrode 50 is set to be orthogonal to the first electrode 30, as viewed in the stacking direction (Z-axis direction). The first electrode forms a substrate formed by the same substrate 3. The conductor pitch (P ₂ ) between the second electrodes 50 was 2 mm.

Further, both the first electrode forming substrate 3 and the second electrode forming substrate 5 are bonded to each other by a transparent adhesive on the surface of the transparent substrate 7 (the side of the transparent adhesive is blackened in advance) A metal foil laminated board was produced by a treatment having a thickness of 12 μm, and the metal foil laminated board was produced by photolithography. The blackening treatment is performed by immersing the electrolytic copper foil at a temperature of 95 ° C for 2 minutes on sodium chlorite (31 g / L), sodium hydroxide (15 g / L), and trisodium phosphate (12 g / L). In the aqueous solution, the treatment is carried out. The formed first electrode 30 and second electrode 50 are also subjected to a blackening treatment.

[First heat-fusible film and second heat-fusible film]

The first heat-fusible film 2 and the second heat-fusible film 4 are a film formed of a polyethylene-vinyl acetate-based copolymer (EVA-based adhesive film: "MERUSEN7053" manufactured by TOSOH Co., Ltd., thickness: 150 μm).

[Perspective touch panel electrode laminate]

The transparent substrate with the functional film, the first heat-fusible film 2, the first electrode-formed substrate 3, the second heat-fusible film 4, and the second electrode-formed substrate 5 are stacked in this order, and are placed for 60 minutes and 115 minutes. The temperature of °C is heated and pressed at a pressure of 248.1 kPa (2.53 kgf/cm ² ) in the laminating direction (Z-axis direction), and then cooled to room temperature, whereby the film shown in FIG. 1C can be produced. Perspective touch panel electrode laminate A.

[Performance Assessment]

The transparent touch panel electrode laminate A obtained as described above was measured. The resistance values of the first electrode 30 and the second electrode 50 are 0.16 Ω/cm on average. This resistance value is a value that is well suited to the range of the electrode sensor of the touch panel (1 Ω/cm or less). Therefore, it is confirmed that the shape and size of the transparent touch panel electrode laminate A as shown in FIGS. 2A to 2D are most suitable for a touch panel having a diagonal length of the screen of more than 15 吋 (38.1 cm). .

Further, before the high-temperature test for 1000 hours under the conditions of a temperature of 80 ° C, the color tone (L*, a*, b*), the minimum reflectance, the haze (HAZE), and the total light transmittance (TT) were measured.

Specifically, the hue (L*, a*, b*) was measured using a Konica Minolta color difference meter "CM3600d" and a D65 light source with a field of view of 10 degrees. Further, the hue (L*, a*, b*) is a coordinate indicating a Lab color chromaticity diagram determined by the International Commission on Illumination (CIE), and L* brightness, (a*, b*) coordinates indicate hue and Chroma.

In addition, the turbidity (HAZE) and the total light transmittance (TT) were measured by a turbidity meter "NDH2000" manufactured by Nippon Denshoku Industries Co., Ltd., and measured according to JIS K7361-1997.

And before the high temperature and high humidity test for 1000 hours under the conditions of a temperature of 60 ° C and a relative humidity of 90% RH, the same color tone (L*, a*, b*), minimum reflectance, and turbidity (HAZE) were measured as described above. ) and total light transmittance (TT).

The above measurement results are indicated in Table 1.

Fig. 9 shows the transmission spectrum before and after the high temperature test, and Fig. 10 shows the transmission spectrum before and after the high temperature and high humidity test. In addition, the measurement of the transmission spectrum was carried out using "V-530" manufactured by JASCO Corporation.

The reflection spectrum before and after the high temperature test is shown in Fig. 11, and the reflection spectrum before and after the high temperature and high humidity test is shown in Fig. 12. Further, the measurement of the reflectance spectrum was carried out using a Hitachi spectrophotometer "U-4100".

From the above measurement results, it was confirmed that the transparent touch panel electrode laminate A was excellent in durability.

Moreover, the impact resistance test was performed as follows. As shown in Fig. 13, the steel ball 16 (mass m = 535 g) is suspended from the ceiling 15 by a rope 17 (length h = 1.33 m). In this state, the steel ball 16 is fixed to the support body 19 by vertically erecting the transparent touch panel electrode laminate A with respect to the ground 18, and is disposed to hit the surface of the transparent touch panel electrode laminate A. Slightly central. Further, the steel ball 16 is lifted to the same height as the ceiling 15 in a state where the rope 17 is pulled, and the steel ball 16 is naturally dropped to hit the transparent touch panel electrode stack A. As a result, the straight forward speed of the steel ball 16 was about 5.1 m/s, and the impact force was about 1.3 kN, but the see-through touch panel electrode laminate A was not broken. Further, the see-through touch panel electrode laminate A was replaced with a glass plate having a thickness of 3.2 mm, and when the same test was performed, the glass plate was broken.

(Example 2) [Transparent substrate with functional film]

A transparent substrate with a functional film was produced in the same manner as in Example 1.

[First electrode forming substrate and second electrode forming substrate]

As the first electrode forming substrate 3, as shown in Fig. 4A, a strip-shaped first electrode 30 (having a thickness of 12 μm, a conductor width (L) of 15 μm, a conductor pitch (P ₀ ) of 600 μm, and a bias angle of 45° was used. The mesh metal wiring 6) is a base material formed on the surface of a PET film ("COSMOSHINE A4300" manufactured by Toyobo Co., Ltd., thickness: 100 μm) which is provided on the transparent substrate 7 with a transparent adhesive layer (thickness: 7 μm). The conductor pitch (P ₁ ) between the first electrodes 30 is 2 mm. The transparent adhesive layer was formed in the same manner as in Example 1.

As the second electrode forming substrate 5, as shown in Fig. 4B, the second electrode 50 (thickness 12 μm, conductor width (L) 15 μm, conductor pitch) was observed in the lamination direction (Z-axis direction). (P ₀ ) 600 μm, the mesh metal wiring 6) having a bias angle of 90° is formed as a base material formed by the same as the first electrode forming substrate 3 except that it is orthogonal to the first electrode 30. The conductor pitch (P ₂ ) between the second electrodes 50 was 2 mm.

[First heat-fusible film and second heat-fusible film]

As the first heat-fusible film 2, the same film as in Example 1 was used.

As the second heat-fusible film 4, an amorphous ethylene terephthalate (PET) film (amorphous PET: "RIVESTAR PET G" manufactured by Riken technos Co., Ltd., thickness: 100 μm) was used.

[Perspective touch panel electrode laminate]

In the same manner as in the first embodiment, a see-through touch panel electrode laminate A as shown in Fig. 1C was produced.

[Performance Assessment]

When the resistance values of the first electrode 30 and the second electrode 50 of the transparent touch panel electrode laminate A obtained as described above were measured, the average value was 0.08 Ω/cm. This resistance value is a value that is well suited to the range of the electrode sensor of the touch panel (less than 1 Ω/cm). Therefore, it is confirmed that the transparent touch panel electrode laminate A has the shape and size as shown in FIGS. 4A to 4D, and is most suitable for a touch panel having a diagonal length of the screen of more than 15 吋 (38.1 cm). .

Further, the color tone (L*, a*, b*), the minimum reflectance, the haze (HAZE), and the total light transmittance were measured in the same manner as in Example 1 before the high temperature test for 1,000 hours under the conditions of a temperature of 80 °C. (TT).

And before the high temperature and high humidity test for 1000 hours under the conditions of a temperature of 60 ° C and a relative humidity of 90% RH, the same color tone (L*, a*, b*), minimum reflectance, and turbidity (HAZE) were measured as described above. ) and total light transmittance (TT).

The above measurement results are indicated in Table 2.

Further, the impact resistance test was carried out in the same manner as in Example 1. As a result, the speed before the impact of the steel ball 16 was about 5.1 m/s, and the impact force was about 1.3 kN, but the perspective touch panel electrode laminate A was not broken.

(Example 3) [Transparent substrate with functional film]

A transparent substrate with a functional film was produced in the same manner as in Example 1.

[First electrode forming substrate and second electrode forming substrate]

As the first electrode forming substrate 3, as shown in FIG. 2A, a strip-shaped first electrode 30 (linear metal wiring 6 having a thickness of 2 μm, a conductor width (L) of 8 μm, and a conductor pitch (P ₀ ) of 2 mm) was used. A substrate formed on the surface of a PET film ("COSMOSHINE A4300" manufactured by Toyobo Co., Ltd., thickness: 100 μm) provided on the transparent substrate 7 was deposited by vapor deposition. The conductor pitch (P ₁ ) between the first electrodes 30 is 2 mm.

As the second electrode-forming substrate 5, as shown in FIG. 2B, the use of the strip-shaped second electrode 50 is set to be orthogonal to the first electrode 30, as viewed in the stacking direction (Z-axis direction). The first electrode forms a substrate formed by the same substrate 3. The conductor pitch (P ₂ ) between the second electrodes 50 was 2 mm.

[First heat-fusible film and second heat-fusible film]

As the first heat-fusible film 2 and the second heat-fusible film 4, the same film as in Example 1 was used.

[Perspective touch panel electrode laminate]

In the same manner as in the first embodiment, a see-through touch panel electrode laminate A as shown in Fig. 1C was produced.

[Performance Assessment]

When the resistance values of the first electrode 30 and the second electrode 50 of the transparent touch panel electrode laminate A obtained as described above were measured, the average value was 0.28 Ω/cm. This resistance value is a value that is well suited to the range of the electrode sensor of the touch panel (1 Ω/cm or less). Therefore, it is confirmed that the shape and size of the transparent touch panel electrode laminate A as shown in FIGS. 2A to 2D are most suitable for a touch panel having a diagonal length of the screen of more than 15 吋 (38.1 cm). .

Further, the color tone (L*, a*, b*), the minimum reflectance, the haze (HAZE), and the total light transmittance were measured in the same manner as in Example 1 before the high temperature test for 1,000 hours under the conditions of a temperature of 80 °C. (TT).

And before the high temperature and high humidity test for 1000 hours under the conditions of a temperature of 60 ° C and a relative humidity of 90% RH, the same color tone (L*, a*, b*), minimum reflectance, and turbidity (HAZE) were measured as described above. ) and total light transmittance (TT).

The above measurement results are indicated in Table 3.

Further, the impact resistance test was carried out in the same manner as in Example 1. As a result, the straight forward speed of the steel ball 16 was about 5.1 m/s, and the impact force was about 1.3 kN, but the see-through touch panel electrode laminate A was not broken.

(Comparative Example 1) [Transparent substrate with functional film]

A transparent substrate with a functional film was produced in the same manner as in Example 1.

[First electrode forming substrate and second electrode forming substrate]

Substrate as the first electrode 3 is formed, as shown in FIG. 7A first, using the first strip-shaped electrode 30 (thickness of 80 angstroms, the conductor width (L) 8mm, conductor spacing (P ₁₎ 2mm, the sheet resistance value of 500Ω / The ITO electrode of □ is a substrate formed on the surface of the ethylene terephthalate film (thickness: 100 μm) of the transparent substrate 7.

On the other hand, as the second electrode forming substrate 5, as shown in FIG. 7B, the use of the strip-shaped second electrode 50 is set to be orthogonal to the first electrode 30, as viewed in the stacking direction (Z-axis direction). The first electrode forms a substrate formed by the same substrate 3.

The first electrode forming substrate 3 and the second electrode forming substrate 5 are all manufactured as follows. First, a sintered body of indium oxide (95% by mass) and cerium oxide (5 mass%) was attached to a copper plate (thickness: 5 mm), and the copper plate was mounted on a direct current two-pole magnetron sputtering apparatus. Then, the sintered body was used as a target, and sputtering was performed under the conditions of a pressure of 1.0 × 10 ^-3 Torr (argon-oxygen atmosphere) and electric power of 1 W/cm ² to form an ITO film on the surface of the transparent substrate 7. Then, the ferrous chloride solution is used as an etching liquid, and the unnecessary portion of the ITO film is removed by etching, whereby the first electrode forming substrate 3 on which the ITO electrode is formed is produced as the first electrode 30 and the second electrode 50, and The second electrode forms the substrate 5. The first electrode forming substrate 3 and the second electrode forming substrate 5 thus obtained had a light transmittance of 90% at a wavelength of 550 nm.

[First heat-fusible film and second heat-fusible film]

As the first heat-fusible film 2 and the second heat-fusible film 4, the same film as in Example 1 was used.

[Perspective touch panel electrode laminate]

The transparent substrate with the functional film, the first thermal fusion film 2, the first electrode forming substrate 3, the second thermal fusion film 4, and the second electrode forming substrate 5 are stacked in this order, and are placed for 60 minutes and 115 times. The temperature of °C is heated and pressed at a pressure of 249.1 kPa (2.54 kgf/cm ² ) in the laminating direction (Z-axis direction), and then cooled to room temperature, whereby the film shown in FIG. 1C can be produced. Perspective touch panel electrode laminate A.

[Performance Assessment]

When the resistance values of the first electrode 30 and the second electrode 50 of the transparent touch panel electrode laminate A obtained as described above were measured, the average value was 24 kΩ/cm, and the measurement range was exceeded, and the higher the resistance value, Unable to measure. The resistance value is a value that greatly exceeds the range of the electrode sensor (1 Ω/cm or less) suitable for the touch panel. Thus, confirming the perspective touch The control panel electrode laminate A is not suitable for a touch panel having a diagonal length of the screen of more than 15 吋 (38.1 cm).

A‧‧‧Perspective touch panel electrode laminate

1‧‧‧Transparent substrate

2‧‧‧First hot-melt film

3‧‧‧First electrode forming substrate

30‧‧‧First electrode

4‧‧‧Second thermal fusion film

5‧‧‧Second electrode forming substrate

50‧‧‧second electrode

6‧‧‧Metal wiring

Fig. 1A is a cross-sectional view showing an example of a method of manufacturing the transparent touch panel electrode laminate of the present invention.

Fig. 1B is a cross-sectional view showing an example of the transparent touch panel electrode laminate of the present invention.

Fig. 1C is a cross-sectional view showing another example of the transparent touch panel electrode laminate of the present invention.

Fig. 2A is a plan view showing an example of a first electrode forming substrate of a constituent member of the transparent touch panel electrode laminate of the present invention.

Fig. 2B is a plan view showing an example of a second electrode forming substrate of the constituent members of the transparent touch panel electrode laminate of the present invention.

2C is a plan view showing an example of a transparent substrate, a first heat-fusible film, a second heat-fusible film, or an adhesive layer of the constituent members of the transparent touch panel electrode laminate of the present invention.

Fig. 2D is a plan view showing an example of the transparent touch panel electrode laminate of the present invention.

Fig. 3A is an enlarged view of a portion of Fig. 2.

Fig. 3B is an enlarged view of a portion of Fig. 2B.

Fig. 4A is a plan view showing another example of the first electrode forming substrate of the constituent members of the transparent touch panel electrode laminate of the present invention.

FIG. 4B is a view showing the electrode layer of the transparent touch panel of the present invention. A plan view of another example of the second electrode forming substrate of the constituent members of the stacked body.

Fig. 4C is a plan view showing an example of a transparent substrate, a first heat-fusible film, a second heat-fusible film or an adhesive layer of the constituent members of the transparent touch panel electrode laminate of the present invention.

Fig. 4D is a plan view showing another example of the transparent touch panel electrode laminate of the present invention.

Fig. 5A is an enlarged view of a portion of Fig. 4.

Fig. 3B is an enlarged view of a portion of Fig. 4B.

Fig. 6 is a cross-sectional view showing an example of a conventional perspective touch panel electrode laminate.

7A is a plan view showing an example of a first electrode forming substrate of a constituent member of a conventional transparent touch panel electrode laminate.

7B is a plan view showing an example of a second electrode forming substrate of a constituent member of a conventional transparent touch panel electrode laminate.

7C is a plan view showing an example of a transparent substrate, a first adhesive layer, a second adhesive layer, or a third adhesive layer of the constituent members of the conventional transparent touch panel electrode laminate.

7D is a plan view showing an example of a conventional transparent touch panel electrode laminate.

Fig. 8A is an enlarged view of a portion of Fig. 7A.

Fig. 8B is an enlarged view of a portion of Fig. 7B.

Fig. 9 is a transmission spectrum before and after the high-temperature test of the transparent touch panel electrode laminate of Example 1.

Figure 10 is a perspective touch panel electrode stack of Embodiment 1. The transmission spectrum of the body before and after the high temperature and high humidity test.

Fig. 11 is a reflection spectrum before and after the high-temperature test of the transparent touch panel electrode laminate of Example 1.

Fig. 12 is a reflection spectrum of the transparent touch panel electrode laminate of Example 1 before and after the high-temperature and high-humidity test.

Fig. 13 is an explanatory view showing a method of the impact resistance test.

A‧‧‧Perspective touch panel electrode laminate

1‧‧‧Transparent substrate

2‧‧‧First hot-melt film

3‧‧‧First electrode forming substrate

30‧‧‧First electrode

4‧‧‧Second thermal fusion film

5‧‧‧Second electrode forming substrate

50‧‧‧second electrode

7‧‧‧Transparent substrate

Claims (13)

A transparent touch panel electrode laminate, comprising: a transparent substrate, a first heat-fusible film, a first electrode-forming substrate forming a first electrode, and a second heat-fusible film formed non-parallel to the first electrode The second electrode forming substrate of the second electrode is formed in this order, and the first electrode and the second electrode are metal electrodes having a conductor width of 30 μm or less. The transparent touch panel electrode laminate according to the first aspect of the invention, wherein the turbidity in the lamination direction is 15% or less. The transparent touch panel electrode laminate according to the first or second aspect of the invention, wherein the total light transmittance in the stacking direction is 50% or more. The transparent touch panel electrode laminate according to the first or second aspect of the invention, wherein the first heat-fusible film and the second heat-fusible film are made of a polyethylene-vinyl acetate copolymer, Amorphous polyethylene terephthalate homopolymer, amorphous polyethylene terephthalate copolymer, polyvinyl butyral polymer, polyvinyl butyral copolymer The formation of the group is selected. The transparent touch panel electrode laminate according to the third aspect of the invention, wherein the first heat-fusible film and the second heat-fusible film are made of a polyethylene-vinyl acetate copolymer or an amorphous polymer. Selective formation of a group of ethylene terephthalate homopolymer, amorphous polyethylene terephthalate copolymer, polyvinyl butyral polymer, and polyvinyl butyral copolymer . See the perspective of the first or second item of the patent application scope A touch panel electrode laminate in which the transparent substrate is formed of glass. The transparent touch panel electrode laminate according to the third aspect of the invention, wherein the transparent substrate is formed of glass. The transparent touch panel electrode laminate according to the fourth aspect of the invention, wherein the transparent substrate is formed of glass. The transparent touch panel electrode laminate according to claim 5, wherein the transparent substrate is formed of glass. The transparent touch panel electrode laminate according to the first or second aspect of the invention, wherein the transparent substrate comprises a polyester resin, an acrylic resin, a raw borneol resin, and an olefin Malayan An amine resin, an epoxy resin, a polyurethane resin, or a mixture of these resins is selected and formed. The transparent touch panel electrode laminate according to the third aspect of the invention, wherein the transparent substrate comprises a polyester resin, an acrylic resin, a raw borneol resin, an olefin maleimide resin, An epoxy resin, a polyurethane resin, or a mixture of these resins is selected and formed. The transparent touch panel electrode laminate according to the fourth aspect of the invention, wherein the transparent substrate comprises a polyester resin, an acrylic resin, a norbornene resin, an olefin maleimide resin, An epoxy resin, a polyurethane resin, or a mixture of these resins is selected and formed. The transparent touch panel as described in claim 5 of the patent application scope In the electrode laminate, the transparent substrate is composed of a polyester resin, an acrylic resin, a norbornene resin, an olefin maleimide resin, an epoxy resin, a polyurethane resin, or a mixture of the resins. The formation of the group is selected.