JP6445420B2 - Conductive film laminate, touch sensor, and method of manufacturing touch sensor - Google Patents

Description

The present invention relates to a conductive film laminate, and more particularly to a conductive film laminate for forming a three-dimensional touch sensor.
The present invention also relates to a touch sensor using a conductive film laminate and a method for manufacturing the touch sensor.

In recent years, in various electronic devices such as portable information devices, touch panels that are used in combination with a display device such as a liquid crystal display device and perform an input operation to the electronic device by touching a screen have been widely used.
In addition, while pursuing improvements in portability and operability of electronic devices, touch panels are required to be thin and compatible with three-dimensional shapes, and a detection electrode is formed on a flexible transparent insulating substrate. Development of such conductive films is underway.
For example, Patent Document 1 discloses a method of manufacturing a touch panel having a curved touch surface by deforming a conductive film into a three-dimensional shape and integrating it with a transparent insulating support.

JP2013-257796A

When manufacturing such a three-dimensional touch panel, there is a method in which both the conductive film and the support are deformed into a three-dimensional shape and then bonded to each other. However, there is an error in the deformed shape of the conductive film and the support. In addition, it is difficult to obtain a high-quality touch panel due to misalignment at the time of bonding, and the manufacturing becomes complicated.
There is also a method for manufacturing a three-dimensional touch panel by setting a conductive film in a mold and performing injection molding to form a support. However, in injection molding, the support may be formed thin. There was a problem that it was difficult.

Then, after bonding a conductive film to a flat support body, the method of shape | molding a conductive film and a support body into a three-dimensional shape collectively is examined (patent document 1).
However, it has been found that the adhesive strength is reduced and the conductive film is peeled off from the support at a portion where the molding distortion is large, particularly in a high temperature and high humidity environment.
In addition to a touch panel, a conductive film and a support are also formed into a three-dimensional shape in a similar manner for a three-dimensional heating element and a three-dimensional electromagnetic shield that protects electronic equipment from noise. It was found that the conductive film peeled off from the support.
Further, when the touch panel has a three-dimensional shape, it is required that the input operation can be performed also on the side surface, that is, there is touch sensitivity.

An object of the present invention is to provide a conductive film laminate that eliminates the above-described problems based on the prior art and can prevent peeling between the support and the conductive film even when the support is formed into a three-dimensional shape. .
Another object of the present invention is to provide a three-dimensional touch sensor obtained by using a conductive film laminate. It is another object of the present invention to provide a method for manufacturing a three-dimensional touch sensor using a conductive film laminate.

  In order to achieve the above-mentioned object, the present invention is a conductive film laminate for forming a three-dimensional touch sensor having a detection area on the upper surface and a side surface connected to the upper surface, and has a flat plate shape. An insulating support, and a conductive film bonded to the surface of the support with an adhesive. The conductive film includes a flexible insulating substrate and a conductive film disposed on the insulating substrate. The insulating substrate has at least one opening cut out to include a part of the boundary between the upper surface and the side surface, and the conductive film is electrically connected to each of the plurality of detection electrodes and the detection electrodes. A plurality of peripheral wirings, and at least a part of the peripheral wirings is disposed so as to surround at least a part of the opening, and the opening is closed by a support. Provide film laminate It is intended.

The opening is preferably made of a through hole. Moreover, it is preferable that an opening part consists of notches.
The detection electrodes may be formed on both surfaces of the insulating substrate, and the detection electrodes on each surface may extend in directions intersecting each other. The detection electrode preferably has a mesh pattern made of fine metal wires.

The present invention provides a touch sensor characterized in that a three-dimensional shape is formed of a conductive film laminate.
When formed into a three-dimensional shape, a flange portion is further formed around the side surface, and the opening is disposed so as to include a part of the boundary portion between the upper surface and the side surface and a part of the boundary portion between the side surface and the flange portion. It is preferable.

The touch sensor has a polygonal upper surface and a plurality of side surfaces connected to the upper surface, and the opening is a boundary between the upper surface and the upper surface at the corner of the upper surface when the film laminate is formed. Preferably, the peripheral wiring is arranged so as to include at least a part of the apex formed by the portion, and the peripheral wiring is arranged across at least a part of the pair of side surfaces.
It is preferable that at least a part of the detection electrode on the side surface is provided along the contour of the upper surface.

  Moreover, this invention provides the manufacturing method of the touch sensor characterized by shape | molding a conductive film laminated body in a three-dimensional shape.

According to the present invention, it is possible to prevent peeling between the support and the conductive film even if the support is formed into a three-dimensional shape. Moreover, it has touch sensitivity on the side surface of the three-dimensional shape.
In addition, according to the present invention, since the end portions of the peripheral wiring can be concentrated in one place, it is possible to easily connect the flexible printed wiring board for connecting to the semiconductor element for signal calculation. .

It is a perspective view which shows the conductive film laminated body for touch sensors which concerns on Embodiment 1 of this invention. It is a fragmentary sectional view which shows the conductive film laminated body for touch sensors of Embodiment 1 of this invention. It is a top view which shows the conductive film of the conductive film laminated body for touch sensors of Embodiment 1 of this invention. It is a top view which shows the 1st example of the conductive film of the conductive film laminated body for touch sensors for a comparison. It is a fragmentary top view which shows the detection electrode of a conductive film. (A) And (B) is a schematic diagram for demonstrating the three-dimensional shaping | molding method of the electrically conductive film laminated body for touch sensors in order of a process. It is a perspective view which shows the electrically conductive film laminated body for touch sensors of Embodiment 1 extended | stretched and processed into the square cylinder shape. (A) is a perspective view which shows the touch sensor shape | molded from the conductive film laminated body for touch sensors of Embodiment 1 of this invention, (B) is a principal part enlarged view of FIG. 8 (A). (A) is a perspective view which shows the conductive film laminated body for touch sensors which concerns on Embodiment 2 of this invention, (B) is the conductive film of the conductive film laminated body for touch sensors of Embodiment 1 of this invention. FIG. It is a top view which shows the 2nd example of the conductive film of the conductive film laminated body for touch sensors for a comparison. It is a perspective view which shows the conductive film laminated body for touch sensors of Embodiment 2 deep-drawn in the square cylinder shape. (A) And (B) is sectional drawing for demonstrating deep drawing. (A) is a perspective view which shows the touch sensor shape | molded from the electrically conductive film laminated body for touch sensors of Embodiment 2 of this invention, (B) is a principal part enlarged view of FIG. 13 (A). It is a perspective view which shows the conductive film laminated body for touch sensors which concerns on Embodiment 3. FIG. It is a perspective view which shows the conductive film laminated body for touch sensors of Embodiment 3 of this invention extended | stretched and processed into the cylindrical shape. It is a perspective view which shows the touch sensor shape | molded from the electrically conductive film laminated body for touch sensors of Embodiment 3 of this invention. It is a perspective view which shows the conductive film laminated body for touch sensors which concerns on Embodiment 4 of this invention. It is a perspective view which shows the conductive film laminated body for touch sensors of Embodiment 4 of this invention deep-drawn into the cylindrical shape. It is a perspective view which shows the touch sensor shape | molded from the electrically conductive film laminated body for touch sensors of Embodiment 4 of this invention. It is a figure which shows the measurement location of the film thickness of the conductive film laminated body for touch sensors press-molded by the square cylinder shape. It is a graph which shows the film thickness distribution of the conductive film laminated body for touch sensors by which the overhang | projection process was carried out, and the conductive film laminated body for touch sensors by which deep drawing was carried out. It is a figure which shows the formation place of the opening part of the electrically conductive film at the time of press-molding to a rectangular tube shape. It is a figure which shows the formation place of the opening part of the electrically conductive film at the time of press-molding to a cylindrical shape.

Hereinafter, based on preferred embodiments shown in the accompanying drawings, a conductive film laminate, a touch sensor, and a method for manufacturing the touch sensor of the present invention will be described in detail.
In the following, “to” indicating a numerical range includes numerical values written on both sides. For example, when ε is a numerical value α to a numerical value β, the range of ε is a range including the numerical value α and the numerical value β, and expressed by mathematical symbols, α ≦ ε ≦ β.
Unless otherwise specified, angles such as “parallel” and “orthogonal” include error ranges generally accepted in the technical field.
“Same” includes an error range generally allowed in the technical field. “Any” or “entire surface” includes an error range generally allowed in the technical field, in addition to the case of 100%.

  The conductive film laminate according to the present invention can be used for a touch sensor in which a plurality of detection electrodes are formed on the surface of a transparent support. Hereinafter, embodiments of the touch sensor will be described. The touch sensor of the present invention is generally called a touch panel.

(Embodiment 1)
In FIG. 1, the structure of the conductive film laminated body 31 for touch sensors which concerns on Embodiment 1 is shown. This conductive film laminate 31 for a touch sensor is for manufacturing a rectangular tube-shaped touch sensor by overhanging, and a transparent conductive film 33 is formed on the surface of a transparent insulating support 32 having a flat plate shape. Bonded with adhesive. The conductive film 33 has a rectangular planar shape, and openings 34 each including a through hole are formed at positions close to the four corners of the rectangle. These openings 34 are formed at positions including four vertices on the upper surface of the square tube when the touch sensor conductive film laminate 31 is formed into a square tube shape.
As shown in FIG. 2, the conductive film 33 includes conductive members 36 formed on both sides of a rectangular flexible transparent insulating substrate 35, and the insulating substrate 35 is covered so as to cover the conductive member 36. A transparent protective layer 37 is formed on both sides.
The openings 34 are formed in portions of the insulating substrate 35 where the conductive member 36 is not formed, and are each closed by the support 32. Here, “blocked” refers to a state in which 60% or more of the opening area of the opening 34 is blocked before or after molding.

  Here, the term “transparent” means that the light transmittance is at least 60% or more, preferably 75% or more, more preferably 80% or more, in the visible light wavelength region having a wavelength of 400 to 800 nm. More preferably, it is 85% or more. The light transmittance is measured using, for example, “Plastic—How to obtain total light transmittance and total light reflectance” defined in JIS K 7375: 2008.

As shown in FIG. 3, the conductive film 33 has a sensing area S1 and a peripheral area S2 outside the sensing area S1. A plurality of first detections arranged in parallel in a second direction D2 extending along the first direction D1 and orthogonal to the first direction D1 in the sensing region S1 on the surface of the insulating substrate 35. An electrode 38 is formed, and a plurality of first peripheral wirings 39 electrically connected to the plurality of first detection electrodes 38 are arranged close to each other in the peripheral region S2. The plurality of first peripheral wirings 39 are grouped into one terminal 46 on one side 35 a of the insulating substrate 35. The plurality of first detection electrodes 38 and the plurality of first peripheral wirings 39 constitute a conductive film.
The first peripheral wiring 39 is disposed so as to surround a part of the opening 34. Specifically, the conductive film 33 has four corners 33a, 33b, 33c, and 33d. In the corner 33b, the first peripheral wiring 39 is disposed so as to surround the two sides 34a of the opening 34. ing. At the corner 33 c, the first peripheral wiring 39 is disposed so as to surround the three sides 34 a of the opening 34.

Similarly, a plurality of second detection electrodes 40 extending in the second direction D2 and arranged in parallel in the first direction D1 are formed on the back surface of the insulating substrate 35 in the sensing region S1. In the peripheral region S2, a plurality of second peripheral wirings 41 electrically connected to the plurality of second detection electrodes 40 are arranged close to each other. The plurality of second peripheral wirings 41 are grouped into one terminal 46 on one side 35 a of the insulating substrate 35. The plurality of second detection electrodes 40 and the plurality of second peripheral wirings 41 constitute a conductive film.
The second peripheral wiring 41 is disposed so as to surround a part of the opening 34. Specifically, at the corner 33 b, the second peripheral wiring 41 is disposed so as to surround the three sides 34 a of the opening 34.

  Here, disposing so as to surround means that 25% or more of the object is surrounded, preferably 50% or more of the object is surrounded, and the upper limit is 100%. The first peripheral wiring 39 and the second peripheral wiring 41 preferably surround two or more sides if the opening 34 is a square.

  The plurality of first detection electrodes 38 and the plurality of second detection electrodes 40 extend in a direction intersecting with the first direction D1 and the second direction D2. In addition, the first peripheral wiring 39 and the second peripheral wiring 41 are each combined into one terminal 46, and can be collected in one place. For this reason, when the flexible printed wiring board 47 and the terminal 46 to be connected to a semiconductor element for signal calculation are electrically connected, electrical connection work such as crimping can be performed only once. It can be done easily. In addition, the peeling when molded into a three-dimensional shape is improved, and a touch sensor having a sensing region on the side surface, that is, having touch sensitivity on the side surface can be effectively produced.

Here, FIG. 4 is a plan view showing a first example of a conductive film of a conductive film laminate for a touch sensor for comparison. In the conductive film 100 shown in FIG. 4, the same components as those of the conductive film 33 shown in FIG.
The conductive film 100 shown in FIG. 4 has a plurality of terminals 46 as compared with the conductive film 33 shown in FIG. 3, and has a plurality of terminals 46, and a plurality of first detection electrodes 38. 3 and the conductive film 33 shown in FIG. 3 except that the terminals 46 of the plurality of second detection electrodes 40 are electrically connected to the branch portions 102a, 102b, and 102c of the flexible printed wiring board 102, respectively. It is the same configuration. In FIG. 4, illustration of the terminals 46 of the first detection electrode 38 and the flexible printed wiring board 102 having the branch portions 102 a, 102 b, 102 c that are electrically connected is omitted.

  In the conductive film 100 of FIG. 4 in which the above-described terminals 46 are not combined into one, each terminal 46 is crimped to each branch portion 102a, 102b, 102c, for example, and the flexible printed wiring board 102 and each terminal 46 are connected. Must be electrically connected. In this case, three crimping operations are required, and the operation becomes complicated. Furthermore, the flexible printed wiring board 102 requires three branch portions 102a, 102b, and 102c, which are increased by the respective branch portions 102a, 102b, and 102c, the flexible printed wiring board 102 itself becomes larger, and handling is also possible. It becomes complicated.

  As shown in FIG. 5, the first detection electrode 38 disposed on the surface of the insulating substrate 35 is formed by a mesh pattern made of fine metal wires 38 a and is disposed on the back surface of the insulating substrate 35. The second detection electrode 40 is also formed by a mesh pattern made of fine metal wires 40a.

Such a conductive film 33 forms the conductive member 36 including the first detection electrode 38 and the first peripheral wiring 39 on the surface of the insulating substrate 35, and the second detection electrode on the back surface of the insulating substrate 35. The conductive member 36 including the 40 and the second peripheral wiring 41 is formed, and the transparent protective layers 37 are formed on both surfaces of the insulating substrate 35 so as to cover the conductive member 36.
The method for forming these conductive members 36 is not particularly limited. For example, by exposing a photosensitive material having an emulsion layer containing a photosensitive silver halide salt as described in JP-A-2012-185813 [0067] to [0083], and developing the photosensitive material, The conductive member 36 can be formed.

  Also, metal foils are formed on the front and back surfaces of the insulating substrate 35, respectively, and a resist is printed in a pattern on each metal foil, or the resist applied on the entire surface is exposed and developed to be patterned to form openings. These conductive members 36 can also be formed by etching part of the metal. In addition to this, a method including printing a paste containing fine particles of the material constituting the conductive member 36 on the front and back surfaces of the insulating substrate 35 and plating the paste with metal, and containing fine particles of the material constituting the conductive member 36 Method using ink jet method using ink, method of forming ink containing fine particles of material constituting conductive member 36 by screen printing, method of forming resin having insulating substrate 35 groove and applying conductive ink to the groove A microcontact printing patterning method or the like can be used.

  Here, as an example, a method for producing a conductive film for a touch sensor by exposing a photosensitive material having an emulsion layer containing a photosensitive silver halide salt and performing development processing will be described.

(Preparation of silver halide emulsion)
An amount corresponding to 90% of each of the 2nd and 3rd liquids described below was added to 1 liquid described later maintained at 38 ° C. and pH 4.5 over 20 minutes while stirring to form 0.16 μm core particles. . Subsequently, the following 4th and 5th liquids were added over 8 minutes, and the remaining 10% of the following 2nd and 3rd liquids were further added over 2 minutes to grow to 0.21 μm. Further, 0.15 g of potassium iodide was added and ripened for 5 minutes to complete the grain formation.

<1 liquid>
750 ml of water
8.6g gelatin
Sodium chloride 3.1g
1,3-Dimethylimidazolidine-2-thione 20mg
Sodium benzenethiosulfonate 10mg
Citric acid 0.7g

<2 liquids>
300 ml of water
150 g silver nitrate

<3 liquids>
300 ml of water
Sodium chloride 38g
Potassium bromide 32g
5 ml of potassium hexachloroiridium (III) (0.005% KCl 20% aqueous solution)
Ammonium hexachlororhodate (0.001% NaCl 20% aqueous solution) 7 ml

<4 liquids>
100ml water
Silver nitrate 50g

<5 liquids>
100ml water
Sodium chloride 13g
Potassium bromide 11g
Yellow blood salt 5mg

  Then, it washed with water by the flocculation method according to a conventional method. Specifically, the temperature was lowered to 35 ° C., and the pH was lowered using sulfuric acid until the silver halide precipitated (the pH was in the range of 3.6 ± 0.2). Next, about 3 liters of the supernatant was removed (first water washing). Further, 3 liters of distilled water was added, and sulfuric acid was added until the silver halide settled. Again, 3 liters of the supernatant was removed (second water wash). The same operation as the second water washing was further repeated once (third water washing) to complete the water washing / desalting step. The emulsion after washing with water and desalting was adjusted to pH 6.3 and pAg 7.4, and 2.5 g of gelatin, 10 mg of sodium benzenethiosulfonate, 3 mg of sodium benzenethiosulfinate, 15 mg of sodium thiosulfate and 10 mg of chloroauric acid were added. Chemical sensitization was performed to obtain an optimum sensitivity at 0 ° C., and 100 mg of 1,3,3a, 7-tetraazaindene as a stabilizer and 100 mg of proxel (trade name, manufactured by ICICo., Ltd.) as a preservative . The finally obtained emulsion contains 0.08 mol% of silver iodide, and the ratio of silver chlorobromide is 70 mol% of silver chloride and 30 mol% of silver bromide. It was a silver iodochlorobromide cubic grain emulsion having a coefficient of 9.5%.

(Preparation of photosensitive layer forming composition)
1,3,3a, 7-tetraazaindene 1.2 × 10 ⁻⁴ mol / mol Ag, hydroquinone 1.2 × 10 ⁻² mol / mol Ag, citric acid 3.0 × 10 ⁻⁴ mol / Mol Ag, 2,4-dichloro-6-hydroxy-1,3,5-triazine sodium salt 0.90 g / mol Ag, a trace amount of hardener was added, and the coating solution pH was adjusted to 5. with citric acid. Adjusted to 6.

A dispersant comprising a polymer represented by (P-1) and (P-2) described later (a mixture of 1: 1 by weight) and a dialkylphenyl PEO sulfate with respect to gelatin contained in the coating solution. Was added. In addition, the addition amount of the crosslinking agent was adjusted so that the amount of the crosslinking agent in the silver halide-containing photosensitive layer described later was 0.09 g / m ² . A photosensitive layer forming composition was prepared as described above.

(Photosensitive material formation process)
After the corona discharge treatment is performed on the insulating substrate, an undercoat layer having a thickness of 0.05 μm having the composition described below is formed on both surfaces of the insulating substrate, and the optical density is about 1.0 on the undercoat layer and the alkali of the developer An antihalation layer containing a dye to be decolorized was provided. The above-mentioned composition for forming a photosensitive layer is applied on the above-mentioned antihalation layer, and further a protection of 0.15 μm in thickness comprising the above-mentioned polymer (a mixture of P1 and P2 in a weight ratio of 1: 1) and a gelatin layer. A layer was provided. The mixing mass ratio (polymer / gelatin) of the polymer and gelatin of the protective layer was 0.1 / 1, and the polymer content was 0.015 g / m ² . In this way, an insulating substrate having a photosensitive layer formed on both sides was obtained. An insulating substrate having a photosensitive layer formed on both sides is referred to as a film A. The formed photosensitive layer had a silver amount of 6.0 g / m ² and a gelatin amount of 1.0 g / m ² .

(Composition of undercoat layer)
The above-described polymer latex P-1 55 mg / m ²
Surfactant Ravizol A-90 (trade name: manufactured by NOF Corporation) 1.3 mg / m ²
Surfactant NAROACTY CL-95 (trade name: Sanyo Chemical Industries, Ltd.) 0.8 mg / m ²
Crosslinking agent Carbodilite V-02-L2 (trade name: manufactured by Nisshinbo Co., Ltd.) ... 10 mg / m ²
Colloidal silica (particle size: 40-50 nm) Snowtex XL (trade name: manufactured by Nissan Chemical Industries, Ltd.) ... 1.3 mg / m ²
Carnauba wax ... 2.5mg / m ²

Here, a solid disperse dye having a structure to be described later was used as the dye to be decolorized with an alkali, and the coating amount per side was 0.8 g / m ² .

(Exposure development process)
Both surfaces of the above-described film A were exposed using parallel light using a high-pressure mercury lamp as a light source through a photomask corresponding to the pattern of the conductive member 36. After the exposure, the film was developed with a developer described later, and further developed using a fixer (trade name: N3X-R for CN16X, manufactured by Fuji Film Co., Ltd.). Further, the substrate was rinsed with pure water and dried to obtain an insulating substrate having a conductive member 36 made of Ag wire and a gelatin layer formed on both sides. A gelatin layer was formed between Ag lines. The resulting film is referred to as film B.

(Developer composition)
The following compounds are contained in 1 liter (L) of the developer.
Hydroquinone 0.037mol / L
N-methylaminophenol 0.016 mol / L
Sodium metaborate 0.140 mol / L
Sodium hydroxide 0.360 mol / L
Sodium bromide 0.031 mol / L
Potassium metabisulfite 0.187 mol / L

(Heating process)
The above-mentioned film B was left to stand in a superheated steam bath at 120 ° C. for 130 seconds and subjected to heat treatment. The film after the heat treatment is referred to as film C.

(Gelatin decomposition treatment)
The film C was immersed in an aqueous solution (proteolytic enzyme concentration: 0.5% by mass, liquid temperature: 40 ° C.) of a proteolytic enzyme (Biosease AL-15FG manufactured by Nagase ChemteX Corporation) for 120 seconds. The film C was taken out from the aqueous solution, immersed in warm water (liquid temperature: 50 ° C.) for 120 seconds and washed. The film after gelatin degradation is designated as film D.

(Calendar processing)
Using a calender device with a combination of a metal roller (diameter 95 mm) and a resin roller (diameter 95 mm), a jack pressure of 11.4 MPa is applied to film D and conveyed at a speed of 120 mm / min. The calendar process was performed. Further, the calendered film was left in a 120 ° C. superheated steam bath for heat treatment. The obtained film is referred to as film E. This film E is a conductive film for touch sensors.

The conductive film laminate 31 for a touch sensor is produced by bonding the conductive film 33 thus manufactured to the surface of the support 32 with a transparent adhesive.
As a material for forming the support 32, polycarbonate (PC), cycloolefin polymer (COP), acrylic resin, or the like can be used.

Next, a method for producing a rectangular tube-shaped touch sensor from the conductive film laminate 31 for a touch sensor will be described.
First, using a press molding machine as shown in FIGS. 6 (A) and (B), the conductive film laminate 31 for touch sensor is strongly pressed between the wrinkle presser 5 and the lower mold 6 by the spring 4, By lowering the upper mold 7 and performing an overhanging process for extending the conductive film laminate 31 for the touch sensor, as shown in FIG. 7, a molded portion 31a formed into a three-dimensional rectangular tube shape, A flange portion 31b around the portion 31a is formed. At this time, the four vertices 43 of the upper surface 42 of the rectangular tube of the molded part 31a are located in the four openings 34 formed at positions close to the four corners of the rectangular conductive film 33, respectively. Yes. There is sensing sensitivity on the side surface 44 of the molded portion 31a. On the side surface 44, the detection electrode is provided along the contour 42 a of the upper surface 42.

  In these openings 34, only the support 32 exists without the conductive film 33 being bonded to the support 32. For this reason, even if it shape | molds the conductive film laminated body 31 for touch sensors in a square cylinder shape, it will prevent effectively that the conductive film 33 peels from the support body 32. FIG.

Thereafter, by cutting off the flange portion 31b from the conductive film laminate 31 for the touch sensor, as shown in FIG. 8 (A), a rectangular tube-shaped touch sensor 45 is manufactured. The touch sensor 45 is a three-dimensional touch sensor having a detection area on the upper surface 42 and a side surface 44 connected to the upper surface 42.
In the touch sensor 45, as shown in FIG. 7B, the first peripheral wiring 39 is disposed across a pair of adjacent side surfaces 44 at the corner 43a. The second peripheral wiring 41 is also disposed across a pair of adjacent side surfaces 44.

(Embodiment 2)
FIG. 9A shows the configuration of the conductive film laminate 51 for a touch sensor according to the second embodiment. This conductive film laminate 51 for a touch sensor is for manufacturing a rectangular tube-shaped touch sensor by deep drawing, and a transparent conductive film 53 on the surface of a transparent insulating support 52 having a flat plate shape. Are joined with an adhesive. The conductive film 53 has a planar shape in which openings 54 each formed of a rectangular cutout are formed at four rectangular corners. As shown in FIG. 11, these openings 54 have a pair of side surfaces 55 and flanges adjacent to each other among the four side surfaces 55 of the rectangular tube when the conductive film laminate 51 for a touch sensor is formed into a rectangular tube shape. It is formed at a position including four intersections 56 where the portion 51b intersects.

  As shown in FIG. 9B, the conductive film 53 is not formed in the opening 34 formed of a through-hole in the insulating substrate 35 as compared with the conductive film 33 in the first embodiment shown in FIG. The opening 54 is different, and the other configuration is the same as that of the conductive film 33 of the first embodiment, and thus detailed description thereof is omitted. As shown in FIG. 9B, the conductive film 53 includes a plurality of first detection electrodes 38, a plurality of first peripheral wirings 39, a plurality of second detection electrodes 40, a plurality of second peripheral wirings 41, and the like. The conductive member is formed. The plurality of first peripheral wirings 39 are grouped into one terminal 46 on one side of the insulating substrate 35. A plurality of second peripheral wirings 41 are also integrated into one terminal 46 on one side of the insulating substrate 35. By consolidating the terminals 46 in one place, the electrical connection work such as crimping is performed once when the flexible printed wiring board 47 and the terminals 46 are electrically connected to a semiconductor element for signal calculation. Therefore, electrical connection can be easily performed.

In addition, each opening 54 is closed by the support body 52. Here, “blocked” means a state in which 60% or more of the opening area of the opening 54 is blocked either before molding or after molding.
In the conductive film 53, the first peripheral wiring 39 is disposed so as to surround the two sides 54 a of the opening 54 at the notch 53 a. Further, the first peripheral wiring 39 is disposed so as to surround the two sides 54 a of the opening 54 at the notch 53 b. The second peripheral wiring 41 is disposed so as to surround the two sides 54 a of the opening 54 at the notch 53 c.

Here, FIG. 10 is a plan view showing a second example of the conductive film of the conductive film laminate for a touch sensor for comparison. In the conductive film 101 shown in FIG. 10, the same components as those of the conductive film 53 shown in FIG. 9B are denoted by the same reference numerals, and detailed description thereof is omitted.
The conductive film 101 shown in FIG. 10 has a plurality of terminals 46 as compared with the conductive film 53 shown in FIG. 9B, and has a plurality of terminals 46. 9B except that the terminals 46 of the detection electrode 38 and the plurality of second detection electrodes 40 are electrically connected to the branch portions 102a, 102b, and 102c of the flexible printed wiring board 102, respectively. It is the same structure as the conductive film 33 shown in FIG. In FIG. 10, the terminals 46 of the first detection electrodes 38 are not shown with the flexible printed wiring board 102 having the branch portions 102a, 102b, and 102c that are electrically connected.

  In the conductive film 101 of FIG. 10 in which the above-described terminals 46 are not combined into one, each terminal 46 is crimped to each branching portion 102a, 102b, 102c, for example, and the flexible printed wiring board 102 and each terminal 46 are connected. Must be electrically connected. In this case, three crimping operations are required, and the operation becomes complicated. Furthermore, the flexible printed wiring board 102 requires three branch portions 102a, 102b, and 102c, which are increased by the respective branch portions 102a, 102b, and 102c, the flexible printed wiring board 102 itself becomes larger, and handling is also possible. It becomes complicated.

Using the press molding machine as shown in FIGS. 12 (A) and 12 (B), the touch sensor conductive film laminate 51 is touched by the spring 4 to such an extent that no wrinkles occur in the peripheral portion. In a state where the film laminate 51 is lightly pressed between the wrinkle presser 5 and the lower die 6, the upper die 7 is lowered to perform deep drawing, thereby forming a rectangular tube shape as shown in FIG. 11. The formed part 51a and the flange part 51b around the formed part 51a are formed.
At this time, of the four side surfaces 55 of the rectangular tube of the molded portion 51a, four intersection points 56 where the pair of side surfaces 55 adjacent to each other and the flange portion 51b intersect are formed at the four corners of the rectangular conductive film 53, respectively. Are located in the four openings 54. The side surface 55 of the molded part 51a has sensing sensitivity, that is, the side surface 55 has touch sensitivity. On the side surface 55, the detection electrode is provided along the contour 57 a of the upper surface 57.

In these openings 54, only the support body 52 exists without the conductive film 53 being bonded to the support body 52. For this reason, even if it shape | molds the conductive film laminated body 51 for touch sensors in square tube shape, it will prevent effectively that the conductive film 53 peels from the support body 52. FIG.
In the second embodiment, the corner region of the upper surface 57 of the square tube including the apex 58 of the upper surface 57 of the square tube is also located in the opening 54 of the conductive film 53.

Thereafter, by cutting off the flange portion 51b from the conductive film laminate 51 for the touch sensor, as shown in FIG. 13A, a rectangular tube-shaped touch sensor 59 is manufactured. The touch sensor 59 is a three-dimensional touch sensor having a detection area on the upper surface 57 and a side surface 55 connected to the upper surface 57.
The conductive film laminate 51 for the touch sensor also has improved peeling when formed into a three-dimensional shape, and can effectively produce a touch sensor having a sensing area on the side surface, that is, having a touch sensitivity on the side surface. Become.
In the touch sensor 59, as shown in FIG. 11B, the first peripheral wiring 39 is disposed across a pair of adjacent side surfaces 44 at the corner 58a.

(Embodiment 3)
In FIG. 14, the structure of the conductive film laminated body 61 for touch sensors which concerns on Embodiment 3 is shown. This conductive film laminate 61 for a touch sensor is for manufacturing a cylindrical touch sensor by overhanging, and a transparent conductive film 63 is adhered on the surface of a transparent insulating support 62 having a flat plate shape. It is joined with the agent. The conductive film 63 has a circular planar shape, and has openings 64 each formed of a through hole at four locations close to the peripheral edge. These openings 64 are formed at positions that include the boundary lines at four locations of the annular boundary between the upper surface and the side surface of the cylinder when the conductive film laminate 61 for touch sensors is formed into a cylindrical shape. Has been.

The conductive film 63 includes a plurality of first detection electrodes 38, a plurality of first peripheral wirings 39, and a plurality of second second electrodes as shown in FIG. 3, similarly to the conductive film 33 in the first embodiment. Conductive members such as the detection electrode 40 and a plurality of second peripheral wirings 41 are formed. For this reason, the detailed description about the conductive film 63 is omitted.
In addition, each opening 64 is closed by the support body 62. Here, “blocked” means a state in which 60% or more of the opening area of the opening 64 is blocked either before molding or after molding.

The conductive film laminate 61 for such a touch sensor is formed into a cylindrical shape as shown in FIG. 15 by subjecting the conductive film laminate 61 to a press forming machine as shown in FIGS. 6 (A) and 6 (B). The formed molded part 61a and the flange part 61b around the molded part 61a are formed.
At this time, the boundary lines 67 at the four annular boundary portions between the cylindrical upper surface 65 and the side surface 66 of the molded portion 61a and the four annular boundary portions between the cylindrical side surface 66 and the flange portion 61b are formed. Each boundary line 68 is located in four openings 64 formed in the conductive film 63. The side surface 66 of the molded portion 61a has sensing sensitivity, that is, the side surface 66 has touch sensitivity. On the side surface 66, the detection electrode is provided along the contour 65 a of the upper surface 65.

  In these openings 64, only the support body 62 exists without the conductive film 63 being bonded to the support body 62. For this reason, even if it shape | molds the conductive film laminated body 61 for touch sensors in a cylindrical shape, it will prevent effectively that the conductive film 63 peels from the support body 62. FIG.

  Thereafter, the flange portion 61b is cut from the conductive film laminate 61 for touch sensor, whereby a cylindrical touch sensor 69 is manufactured as shown in FIG. The touch sensor 69 is a three-dimensional touch sensor having a detection area on the upper surface 65 and a side surface 66 connected to the upper surface 65.

(Embodiment 4)
In FIG. 17, the structure of the conductive film laminated body 71 for touch sensors which concerns on Embodiment 4 is shown. This conductive film laminate 71 for touch sensor is for manufacturing a cylindrical touch sensor by deep drawing, and a transparent conductive film 73 is formed on the surface of a transparent insulating support 72 having a flat plate shape. Bonded with adhesive. The conductive film 73 has a circular planar shape, and has openings 74 each formed of a notch at four locations close to the peripheral edge. These openings 74 are formed at positions that include the boundary lines at four locations of the annular boundary between the side surface of the cylinder and the flange portion when the conductive film laminate 71 for touch sensors is formed into a cylindrical shape. Has been.

Note that the conductive film 73 includes a plurality of first detection electrodes 38, a plurality of first peripheral wirings 39, and a plurality of pieces as shown in FIG. Conductive members such as the second detection electrode 40 and a plurality of second peripheral wirings 41 are formed. For this reason, detailed description about the conductive film 73 is omitted.
Each opening 74 is closed by a support 72. Here, “closed” refers to a state in which 60% or more of the opening area of the opening 74 is blocked either before or after molding.

By subjecting such a conductive film laminate 71 for a touch sensor to deep drawing with a press molding machine as shown in FIGS. 12A and 12B, a cylindrical shape is obtained as shown in FIG. A molded part 71a and a flange part 71b around the molded part 71a are formed.
At this time, the boundary line 77 at the four annular boundary portions between the upper surface 75 and the side surface 76 of the cylindrical portion 71a and the four annular boundary portions between the cylindrical side surface 76 and the flange portion 71b are formed. Each of the boundary lines 78 is located in the four openings 74 formed in the conductive film 73. The side surface 76 of the molded portion 71a has sensing sensitivity, that is, the side surface 76 has touch sensitivity. On the side surface 76, the detection electrode is provided along the contour 75 a of the upper surface 75.

In these openings 64, only the support 72 exists without the conductive film 73 being bonded to the support 72. For this reason, even if it shape | molds the conductive film laminated body 71 for touch sensors in a cylindrical shape, it will prevent effectively that the conductive film 73 peels from the support body 72. FIG.
In the fourth embodiment, the region of the upper surface 75 of the cylinder adjacent to the boundary line 78 is also located in the opening 74 of the conductive film 73.

  Thereafter, the flange portion 71b is cut off from the conductive film laminate 71 for touch sensor, whereby the cylindrical touch sensor 79 is manufactured as shown in FIG. The touch sensor 79 is a three-dimensional touch sensor having a detection area on the upper surface 75 and a side surface 76 connected to the upper surface 75.

In the first and second embodiments described above, the rectangular tube-shaped touch sensors 45 and 59 having a rectangular upper surface are manufactured. However, the present invention is not limited to this, and similarly, a triangular or pentagonal or more polygonal sensor is used. A rectangular tube-shaped touch sensor having a rectangular upper surface can also be manufactured.
In Embodiments 3 and 4 described above, cylindrical touch sensors 69 and 79 are manufactured. However, the present invention is not limited to this, and an elliptical touch sensor can be manufactured in the same manner.
Furthermore, various other three-dimensional touch sensors can be manufactured in the same manner.

  The present invention is basically configured as described above. As described above, the conductive film laminate, the touch sensor, and the touch sensor manufacturing method of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiment, and various improvements can be made without departing from the gist of the present invention. Of course, changes may be made.

  The features of the present invention will be described more specifically with reference to the following examples. The materials, reagents, used amounts, substance amounts, ratios, processing details, processing procedures, and the like shown in the following examples can be appropriately changed without departing from the spirit of the present invention. Accordingly, the scope of the present invention should not be construed as being limited by the specific examples shown below.

A touch sensor conductive film laminate 3 produced by bonding a transparent conductive film 2 to the surface of a transparent insulating support 1 with an adhesive is pressed into a rectangular tube shape as shown in FIG. The thickness distribution of the conductive film laminate 3 for a touch sensor was measured by molding.
As press molding, both the overhanging process shown in FIGS. 6 (A) and 6 (B) and the deep drawing process shown in FIGS. 12 (A) and 12 (B) were used.

  As shown in FIG. 20, the conductive film laminate 3 for a touch sensor has a molded part 3a formed into a rectangular tube shape by press molding and a flange part 3b around the molded part 3a. Here, along the measurement line L1 orthogonal to one side 12 of the rectangular upper surface 11 of the rectangular tube, the thickness distribution of the upper surface 11 and the side surface 13 of the molded tube 3a and the flange portion 3b was measured. However, in both the overhanging process and the deep drawing process, the change in the thickness on the measurement line L1 was small, and there was no spot where the molding strain was concentrated on the conductive film laminate 3 for the touch sensor.

In contrast, the upper surface of the rectangular tube of the molded portion 3a from the measurement point P0 to the measurement point P3 along the measurement line L2 that intersects the side 12 of the upper surface 11 at an angle of 45 degrees and passes through the vertex 14 of the upper surface 11. 11 and the thickness distribution of the flange portion 3b were measured, and the results shown in FIG. 21 were obtained.
That is, in the projecting conductive film laminate 3 for a touch sensor, the conductive property for the touch sensor abruptly increases from the central portion (measurement point P0) of the upper surface 11 of the square tube to the apex 14 (measurement point P1) of the upper surface 11. The thickness of the film laminate 3 decreases, and the flange portion 3b (measurement points P2 to P3) shows a substantially constant thickness. It can be seen that molding distortion concentrates in the region R1 at the corner of the top surface 11 of the square tube including the vertex 14 of the top surface 11.

  On the other hand, in the conductive film laminate 3 for touch sensor that has been deep-drawn, the flange portion 3b (measurement points P2 to P3) is shown on the upper surface 11 (measurement points P0 to P1) of the square tube, although the thickness is almost constant. ) Shows a value significantly larger than the thickness of the upper surface 11 of the square tube, and is thicker than the thickness before molding. It can be seen that molding distortion concentrates in the region R2 of the flange portion 3b on the measurement line L2.

Here, as shown in FIG. 22, the corner region of the top surface 11 of the rectangular tube including the vertex 14 of the top surface 11 of the rectangular tube of the conductive film laminate 3 for the touch sensor 3 is represented by R11, and the vertex 14 of the top surface 11 is represented. An end region adjacent to the apex 14 of the pair of side surfaces 13 is R12, and the end of the flange portion 3b surrounds the intersection 15 where the pair of side surfaces 13 sharing the apex 14 of the upper surface 11 and the flange portion 3b intersect each other. The region of the part is referred to as R13. In the conductive film laminate 3 for a touch sensor, the side surface 13 is also a sensing region, and the side surface 13 also has touch sensitivity.
Then, as shown in Examples 1 to 4 and Comparative Examples 1 to 8 below, each of the conductive films formed by opening a portion corresponding to at least one of the regions R11, R12 and R13 as an opening is supported. A plurality of conductive film laminates for a touch sensor bonded to each other were produced, formed into a rectangular tube shape by overhanging and deep drawing, respectively, and a peeling test of the conductive film on the support was performed.

Example 1
A conductive film laminate for a touch sensor is produced by bonding a conductive film that is formed by cutting out regions R11 and R12 corresponding to the four corners of a rectangular tube when formed into a rectangular tube shape to an opening. Each was then formed into a square tube shape by overhanging.
Here, a biaxially stretched polyethylene terephthalate (PET) film having a thickness of 100 μm is used as the conductive film, and a polycarbonate (PC) having a thickness of 500 μm is used as the support. A conductive film laminate for a touch sensor was produced by bonding a conductive film to a support using (OCA (Optical Clear Adhesive)) 8172CL. And this conductive film laminated body for touch sensors was shape | molded by the overhang | projection process in the square cylinder shape of length 70mm x width 70mm x height 10mm.

(Example 2)
Conductive for touch sensor in the same manner as in Example 1 except that a conductive film is used by cutting out regions R11, R12 and R13 corresponding to the four corners of the square tube when formed into a square tube shape. A film laminate was prepared and formed into a rectangular tube shape by overhanging.

Example 3
Conductive film lamination for a touch sensor in the same manner as in Example 1 except that a conductive film having openings formed by cutting out regions R12 and R13 corresponding to the four corners of the rectangular tube when formed into a rectangular tube shape is used. A body was prepared and formed into a square tube shape by deep drawing.

(Example 4)
Conductive for touch sensor in the same manner as in Example 1 except that a conductive film is used by cutting out regions R11, R12 and R13 corresponding to the four corners of the square tube when formed into a square tube shape. A film laminate was prepared and formed into a square tube shape by deep drawing.

(Comparative Example 1)
A conductive film laminate for a touch sensor was formed in the same manner as in Example 1 except that a conductive film was used by cutting out regions R11 corresponding to the four corners of the rectangular tube when formed into a rectangular tube shape. It was manufactured and formed into a square tube shape by overhanging.

(Comparative Example 2)
A conductive film laminate for a touch sensor is formed in the same manner as in Example 1 except that a conductive film is formed by cutting out regions R12 corresponding to the four corners of the rectangular tube when formed into a rectangular tube shape. It was manufactured and formed into a square tube shape by overhanging.

(Comparative Example 3)
A conductive film laminate for a touch sensor is formed in the same manner as in Example 1 except that a conductive film is formed by cutting out regions R13 corresponding to the four corners of the rectangular tube when formed into a rectangular tube shape. It was manufactured and formed into a square tube shape by overhanging.

(Comparative Example 4)
Conductive film lamination for a touch sensor in the same manner as in Example 1 except that a conductive film having openings formed by cutting out regions R12 and R13 corresponding to the four corners of the rectangular tube when formed into a rectangular tube shape is used. A body was prepared and formed into a rectangular tube shape by overhanging.

(Comparative Example 5)
A conductive film laminate for a touch sensor was formed in the same manner as in Example 1 except that a conductive film was used by cutting out regions R11 corresponding to the four corners of the rectangular tube when formed into a rectangular tube shape. It was manufactured and formed into a square tube shape by deep drawing.

(Comparative Example 6)
A conductive film laminate for a touch sensor is formed in the same manner as in Example 1 except that a conductive film is formed by cutting out regions R12 corresponding to the four corners of the rectangular tube when formed into a rectangular tube shape. It was manufactured and formed into a square tube shape by deep drawing.

(Comparative Example 7)
A conductive film laminate for a touch sensor is formed in the same manner as in Example 1 except that a conductive film is formed by cutting out regions R13 corresponding to the four corners of the rectangular tube when formed into a rectangular tube shape. It was manufactured and formed into a square tube shape by deep drawing.

(Comparative Example 8)
Conductive film lamination for a touch sensor in the same manner as in Example 1 except that a conductive film having openings formed by cutting out regions R11 and R12 corresponding to the four corners of the rectangular tube when formed into a rectangular tube shape is used. A body was prepared and formed into a square tube shape by deep drawing.

  For each of these Examples 1 to 4 and Comparative Examples 1 to 8, five samples of the conductive film laminate for a touch sensor were prepared, and the peeling of the support and the conductive film was visually evaluated with respect to what was formed into a rectangular tube shape. As a result, the results shown in Table 1 were obtained.

In the evaluation results of Table 1, A indicates that no peeling was observed in all the samples to be tested, B indicates that peeling was observed in some of the samples to be tested, and C indicates It shows that peeling was observed in all samples to be tested.
From Table 1, when forming into a rectangular tube shape by overhang processing, molding distortion concentrates in the regions R11 and R12, and at least portions corresponding to both the regions R11 and R12 are cut out as in the first and second embodiments. It was confirmed that peeling between the support and the conductive film was prevented by using the conductive film having an opening. As in the first embodiment, only the regions R11 and R12 may be openings, or all of the regions R11, R12, and R13 may be openings as in the second embodiment. About Examples 1-4, peeling with a support body and a conductive film was prevented, and it confirmed that the side surface 13 had touch sensitivity and the sensing by the side surface 13 was possible.

  On the other hand, as in Comparative Examples 1 to 4, a conductive film having only the region R11, only the region R12, only the region R13, or the portion corresponding to the regions R12 and R13 cut out as an opening. When used, peeling was observed on some or all samples under test. This is presumably because the location where the molding strain is concentrated is located not in the opening but in the joint between the support and the conductive film.

  On the other hand, when forming into a square tube shape by deep drawing, molding distortion concentrates in regions R12 and R13, and at least portions corresponding to both regions R12 and R13 are cut out as in Examples 3 and 4. It was confirmed that peeling between the support and the conductive film was prevented by using the conductive film as the opening. As in the third embodiment, only the regions R12 and R13 may be openings, or all of the regions R11, R12, and R13 may be openings as in the fourth embodiment.

  On the other hand, as in Comparative Examples 5 to 8, a conductive film having an opening by cutting out only the region R11, only the region R12, only the region R13, or the portion corresponding to the regions R11 and R12. When used, peeling was observed on some or all samples under test. This is presumably because the location where the molding strain is concentrated is located not in the opening but in the joint between the support and the conductive film. About Comparative Examples 1-8, peeling was recognized, it was confirmed that there is no touch sensitivity in the side surface 13, and the sensing in the side surface 13 cannot be performed.

Further, the conductive film laminate 23 for a touch sensor produced by joining a transparent conductive film 22 on the surface of a transparent insulating support 21 with an adhesive is formed into a cylindrical shape as shown in FIG. Press molded. The touch sensor conductive film laminate 23 includes a molded portion 23a formed into a cylindrical shape by press molding, and a flange portion 23b around the molded portion 23a.
Here, the annular boundary portion between the cylindrical upper surface 24 and the side surface 25 of the molded portion 23a and the annular boundary portion between the cylindrical side surface 25 and the flange portion 23b are partly located at the same position. When the boundary lines 26 and 27 are set, the region of the upper surface 24 adjacent to the boundary line 26 is R21, the region of the cylindrical side surface 25 sandwiched between the boundary line 26 and the boundary line 27 is adjacent to R22, and the boundary line 27. The region of the flange portion 23b will be referred to as R23. In the conductive film laminate 23 for a touch sensor, the side surface 25 is also a sensing region, and the side surface 25 also has touch sensitivity.

  Then, as shown in Examples 5 to 9 and Comparative Examples 9 to 15 below, each of the conductive films formed as openings by cutting out portions corresponding to at least one of the regions R21, R22, and R23 is used as a support. A plurality of conductive film laminates for a touch sensor bonded to each other were prepared, formed into a cylindrical shape by overhanging and deep drawing, and a peel test of the conductive film on the support was performed.

(Example 5)
Conductive film lamination for touch sensor in the same manner as in Example 1 above, except that a conductive film is formed by cutting out regions R21 and R22 at four locations along the circumference of the cylinder when formed into a cylindrical shape. A body was prepared and formed into a cylindrical shape by overhanging.
As in Example 1, a biaxially stretched polyethylene terephthalate (PET) film having a thickness of 100 μm was used as the conductive film, and a polycarbonate (PC) having a thickness of 500 μm was used as the support. A conductive film laminate for a touch sensor was prepared by bonding a conductive film to a support using an optical transparent adhesive sheet (OCA) 8172CL. And this conductive film laminated body for touch sensors was shape | molded by the overhang | projection process in the cylindrical shape of diameter 70mm x height 10mm.

(Example 6)
Conductive film lamination for a touch sensor is performed in the same manner as in Example 5 above, except that a conductive film is formed by cutting out the regions R22 and R23 at four locations along the circumference of the cylinder when formed into a cylindrical shape. A body was prepared and formed into a cylindrical shape by overhanging.

(Example 7)
Conductive for touch sensor in the same manner as in Example 5 above, except that a conductive film is used by cutting out regions R21, R22 and R23 at four locations along the circumference of the cylinder when formed into a cylindrical shape. A film laminate was produced and formed into a cylindrical shape by overhanging.

(Example 8)
Conductive film lamination for a touch sensor is performed in the same manner as in Example 5 above, except that a conductive film is formed by cutting out the regions R22 and R23 at four locations along the circumference of the cylinder when formed into a cylindrical shape. A body was prepared and formed into a cylindrical shape by deep drawing.

(Comparative Example 9)
A conductive film laminate for a touch sensor was formed in the same manner as in Example 5 above, except that a conductive film was formed by cutting out the regions R21 at four locations along the circumference of the cylinder when formed into a cylindrical shape. It was fabricated and formed into a cylindrical shape by overhanging.

(Comparative Example 10)
A conductive film laminate for a touch sensor is formed in the same manner as in Example 5 above, except that a conductive film is formed by cutting out the regions R22 at four locations along the circumference of the cylinder when formed into a cylindrical shape. It was fabricated and formed into a cylindrical shape by overhanging.

(Comparative Example 11)
A conductive film laminate for a touch sensor is formed in the same manner as in Example 5 above, except that a conductive film is formed by cutting out the regions R23 at four locations along the circumference of the cylinder when formed into a cylindrical shape. It was fabricated and formed into a cylindrical shape by overhanging.

(Comparative Example 12)
A conductive film laminate for a touch sensor was formed in the same manner as in Example 5 above, except that a conductive film was formed by cutting out the regions R21 at four locations along the circumference of the cylinder when formed into a cylindrical shape. It was fabricated and formed into a cylindrical shape by deep drawing.

(Comparative Example 13)
A conductive film laminate for a touch sensor is formed in the same manner as in Example 5 above, except that a conductive film is formed by cutting out the regions R22 at four locations along the circumference of the cylinder when formed into a cylindrical shape. It was fabricated and formed into a cylindrical shape by deep drawing.

(Comparative Example 14)
A conductive film laminate for a touch sensor is formed in the same manner as in Example 5 above, except that a conductive film is formed by cutting out the regions R23 at four locations along the circumference of the cylinder when formed into a cylindrical shape. It was fabricated and formed into a cylindrical shape by deep drawing.

(Comparative Example 15)
Conductive film lamination for touch sensor in the same manner as in Example 5 above, except that a conductive film is formed by cutting out regions R21 and R22 at four locations along the circumference of the cylinder when formed into a cylindrical shape. A body was prepared and formed into a cylindrical shape by deep drawing.

  For each of these Examples 5 to 9 and Comparative Examples 9 to 15, five samples of the conductive film laminate for a touch sensor were prepared, and the peeling of the support and the conductive film was visually evaluated on the one formed into a cylindrical shape. However, the results shown in Table 2 were obtained.

In the evaluation results of Table 2, A indicates that no peeling was observed in all the samples to be tested, B indicates that peeling was observed in some of the samples to be tested, and C indicates It shows that peeling was observed in all samples to be tested.
From Table 2, when forming into a cylindrical shape by overhang processing, molding distortion concentrates in the regions R21 and R22 or the regions R22 and R23, and at least both of the regions R21 and R22 or the regions as in Examples 5-7. It was confirmed that peeling between the support and the conductive film was prevented by using a conductive film in which openings corresponding to both R22 and R23 were cut out. As in the seventh embodiment, all of the regions R21, R22, and R23 may be openings.

  On the other hand, as in Comparative Examples 9 to 11, when a conductive film having an opening portion by cutting out only the region R21, only the region R22, or only the region R23 was used, the test Delamination was observed on some or all samples of the subject. This is presumably because the location where the molding strain is concentrated is located not in the opening but in the joint between the support and the conductive film.

  On the other hand, when forming into a cylindrical shape by deep drawing, molding distortion concentrates in the regions R22 and R23, and at least portions corresponding to both the regions R22 and R23 are cut out and opened as in the eighth and ninth embodiments. It was confirmed that the peeling between the support and the conductive film was prevented by using the conductive film as the part. As in the eighth embodiment, only the regions R22 and R23 may be openings, or all the regions R21, R22, and R23 may be openings as in the ninth embodiment. About Examples 5-9, peeling with a support body and a conductive film was prevented, and the side 25 has touch sensitivity, and it confirmed that the sensing by the side 25 was possible.

  On the other hand, like Comparative Examples 12-15, the conductive film which cut out only the area | region R21 or only area | region R22, or only area | region R23, or the part corresponding to area | region R21 and R22 was used as the opening part. When used, peeling was observed on some or all samples under test. This is presumably because the location where the molding strain is concentrated is located not in the opening but in the joint between the support and the conductive film. About Comparative Examples 9-15, peeling was recognized, it confirmed that there was no touch sensitivity in the side surface 25, and the sensing in the side surface 25 cannot be performed.

  1, 21, 32, 52, 62, 72 Support, 2, 22, 33, 53, 63, 73 Conductive film, 3, 23, 31, 51, 61, 71 Conductive film laminate for touch sensor, 3a, 23a , 51a, 61a, 71a Molded part, 3b, 23b, 51b, 61b, 71b Flange part, 4 Spring, 5 Wrinkle presser, 6 Lower mold, 7 Upper mold, 11, 24, 42, 57, 65, 75 Upper surface, 12 Side, 13, 25, 44, 55, 66, 76 side surface, 14, 58 vertex, 15 intersection point, 26, 27, 67, 68, 77, 78 boundary line, 33a, 33b, 33c, 33d angle, 34, 54, 64, 74 opening, 34a side, 35 insulating substrate, 36 conductive member, 37 protective layer, 38 first detection electrode, 38a, 40a metal fine wire, 39 first peripheral wiring, 40 second Output electrode, 41 Second peripheral wiring, 43 Vertex, 44, 55, 66, 76 Side surface, 45, 59, 69, 79 Touch sensor, 56 Intersection, L1, L2 measurement line, P0 to P3 measurement point, R11 to R13 , R21 to R23 region, S1 sensing region, S2 peripheral region, D1 first direction, D2 second direction

Claims (10)

A conductive film laminate for molding a three-dimensional touch sensor having a detection region on the upper surface and a side surface connected to the upper surface,
An insulating support having a flat plate shape;
A conductive film bonded with an adhesive on the surface of the support,
The conductive film includes a flexible insulating substrate and a conductive film disposed on the insulating substrate,
The insulating substrate has at least one opening cut out to include a part of a boundary between the upper surface and the side surface, and the conductive film is electrically connected to each of the plurality of detection electrodes and the detection electrodes. A plurality of peripheral wirings connected to each other, and at least a part of the peripheral wiring is disposed so as to surround at least a part of the opening, and the opening is closed by the support. A conductive film laminate characterized by comprising:   The conductive film laminate according to claim 1, wherein the opening includes a through hole.   The conductive film laminate according to claim 1, wherein the opening includes a notch.   The conductive film laminate according to any one of claims 1 to 3, wherein the detection electrodes are formed on both surfaces of the insulating substrate, and the detection electrodes on each surface extend in directions intersecting each other. .   The conductive film laminate according to any one of claims 1 to 4, wherein the detection electrode has a mesh pattern made of a thin metal wire.   A touch sensor having a three-dimensional shape formed of the conductive film laminate according to claim 1.   When formed into the three-dimensional shape, a flange portion is further formed around the side surface, and the opening portion is a part of a boundary portion between the upper surface and the side surface and a part of a boundary portion between the side surface and the flange portion. The touch sensor according to claim 6, which is arranged to include   The touch sensor has a polygonal upper surface and a plurality of side surfaces connected to the upper surface, and the opening is formed at the corner of the upper surface when the film laminate is formed, and the upper surface and the upper surface. The touch according to claim 7, wherein the touch is disposed so as to include at least a part of a vertex formed at a boundary portion between the pair of connected side surfaces, and the peripheral wiring is disposed across at least a part of the pair of side surfaces. sensor.   The touch sensor according to claim 6, wherein at least a part of the detection electrode on the side surface is provided along a contour of the upper surface.   A method for manufacturing a touch sensor, wherein the conductive film laminate according to any one of claims 1 to 5 is formed into a three-dimensional shape.