JP2015064707A - Touch panel sensor and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch panel sensor used for an information terminal device with a touch panel having a decorative layer shielding light in a frame-like manner, the touch panel sensor disposing the decorative layer on a side of the touch panel sensor so as to satisfy concealment properties and design properties and improve productivity, and a manufacturing method thereof.SOLUTION: A touch panel sensor has a sensor electrode on both front and back sides of a transparent base material. In the touch panel sensor, a white-based decorative layer is formed in an area excluding at least part of an external connection terminal part, the area being a non-active area including an area over circumferential wiring on both front and back sides of the transparent base material. The decorative layer is distributed on each of the front and back sides of the touch panel sensor so as to reduce film thickness of each decorative layer. Thereby concealment properties, design properties and productivity are improved in the touch panel sensor and by a manufacturing method thereof.

Description

The present invention relates to a touch panel sensor and a manufacturing method thereof.

Recently, terminal devices such as smart phones and tablets that can be input by touch operations that are rapidly spreading are provided with a touch panel overlaid on a display device, and are configured so that the positional relationship between the touch operation and the display corresponds. Yes.
On the other hand, conventionally, in a liquid crystal display device or the like, a decorative layer for concealing the outer peripheral wiring and improving the design is provided on the inner side of the front plate close to the observer side when viewed from the observer side.
Also in the display device with a touch panel, the decorative layer is provided on the front plate (see, for example, Patent Document 1), and further, as in Patent Document 2, a cover glass that laminates the wiring of the touch sensor on the decorative layer. Body sensors have been proposed.
However, when the decorative layer is provided on the front plate, the film thickness becomes thick enough to obtain a concealing effect, resulting in a step, and in the pattern formation step when wiring is formed thereon Problems with applicability and adhesiveness are likely to occur, and problems with the adhesiveness in the assembly process combined with the touch sensor are likely to occur, resulting in failure to obtain a touch panel with good design and productivity.

JP 2011-13761 A Japanese Patent No. 5026580

  A touch panel sensor for use in an information terminal device with a touch panel having a decorative layer that shields light in a frame shape, wherein the decorative layer is provided on the touch panel sensor side, satisfying concealment and design properties, and improving productivity. A sensor and a manufacturing method thereof are provided.

The gist of the first invention for solving the above problem is that an active device having sensor electrodes on both front and back surfaces of a thin plate-like transparent substrate, and corresponding to each of the front and back surfaces of the transparent substrate. A touch panel sensor having a non-active area other than the active area and the active area, wherein at least the outer peripheral wiring and the external connection terminal portions are formed in the non-active areas on both the front and back surfaces of the transparent substrate, A decorative layer is the inactive region including the outer peripheral wiring on both the front and back surfaces of the transparent base material, and is formed in a region excluding at least a part of the external connection terminal portion. It is.
The gist of the second invention for solving the above problem is that an active device having sensor electrodes on both front and back surfaces of a thin transparent substrate and corresponding to each of the front and back surfaces of the transparent substrate. A method for manufacturing a touch panel sensor having a region and an inactive region other than the active region, the step of forming at least outer peripheral wiring and external connection terminal portions in the inactive region on both the front and back surfaces of the transparent substrate, and the transparent Forming a white decorative layer in the non-active area including the outer peripheral wiring on both the front and back surfaces of the base material, and excluding at least a part of the external connection terminal portion. It is a feature.

According to the present invention, the touch panel sensor that improves the concealability, the designability, and the productivity by distributing the decorative layer to the front and back surfaces of the touch panel sensor and reducing the thickness of each decorative layer, and The manufacturing method can be obtained.
As a result, the overall film thickness of the front and back surfaces of the touch panel sensor is reduced, and the level difference that occurs when the decorative layer is thick is reduced, and the protective layer is formed on the transparent substrate including the decorative layer. Etc., it is possible to apply the coating solution without unevenness, and to form an adhesive evenly with the cover sheet or with the display device so that it can be adhered with high dimensional accuracy.

It is sectional drawing which shows the information terminal device using a touch panel sensor. It is sectional drawing which shows one embodiment of a touch panel sensor. It is a top view which shows one embodiment of a touch panel sensor. It is sectional drawing which shows the housing | casing in which the touchscreen sensor was integrated.

  EMBODIMENT OF THE INVENTION The form for implementing this invention below is demonstrated based on FIGS.

FIG. 1 is an information terminal device using the touch panel sensor of the present invention.
As illustrated in FIG. 1, the information terminal device 100 is configured by combining a touch panel device 20 and a display device 30.
The display device 30 includes a display panel that displays display information, such as a liquid crystal display panel, and a display control unit 60 that controls the display information.
The touch panel device 20 includes a touch panel sensor that detects position information on the display surface of the display device 30 and a detection control unit 50 that controls detection of the position information.

As shown in FIG. 2, the information terminal device 100 is configured by incorporating a touch panel device 20 on a display device 30. This touch panel device 20 is a capacitive coupling system, and is configured by laminating the touch panel sensor 10 and laminating the cover sheet 40 thereon.
In FIG. 2, the touch panel sensor 10 includes at least a transparent base material 1, a sensor electrode 2, and an outer peripheral wiring 3, and the sensor electrode 2 and the outer peripheral wiring 3 are provided on both sides of the transparent base material 1. Yes.
Furthermore, a decorative layer 4 is provided on both of the outer peripheral wirings 3 provided on both surfaces of the transparent substrate 1.

FIG. 3 is a plan view for explaining the touch panel sensor of the present invention.
FIG. 3A shows a touch panel sensor 10 according to the present invention, in which a sensor electrode 2 is provided in the center on a transparent substrate 1, and a decorative layer 4 is provided in a frame shape. The sensor electrode 2 is linearly formed along a direction orthogonal to the arrangement direction, and is shown as a strip-like wiring extending in the left-right direction in the drawing.
FIG. 3B shows a state where the decorative layer 4 of the touch panel sensor 10 of the present invention shown in FIG. 3A is not provided.
In the touch panel sensor 10, the outer peripheral wiring 3 is formed so as to be routed around the sensor electrode 2, and one end of the outer peripheral wiring 3 is collected on one side of the transparent substrate 1. An external connection terminal portion G for connecting to an external device such as a control unit is provided at the end of the outer peripheral wiring 3.
Here, there are an active area (a rectangular area surrounded by a two-dot chain line in the figure) corresponding to an area where the touch position of the touch panel is detected, and a frame area surrounding the active area. A non-active region (a frame-shaped region surrounded by the outer shape of the touch panel sensor and a two-dot chain line in the drawing) having the outer peripheral wiring 3 and the external connection terminal portion G is shown.
Therefore, the decoration layer 4 of the touch panel sensor 10 in FIG. 3A is provided in the inactive region excluding the external connection terminal portion G as described above.

FIG. 3C shows a surface opposite to the surface having the decorative layer 4 of the transparent substrate 1 of the touch panel sensor 10 of FIG. 3A (hereinafter referred to as “back surface”).
As shown in FIG. 3 (c), the sensor electrode 2 is formed in a straight line along a direction orthogonal to the arrangement direction of the sensor electrodes 2 shown in FIGS. 3 (a) and 3 (b), and extends in the vertical direction of the drawing. Shown as wiring.

FIG.3 (d) shows the state in which the decoration layer 4 of the touch-panel sensor 10 of this invention of FIG.3 (c) is not provided. As shown in FIG. 3D in a state where the decorative layer 4 is not provided, the outer peripheral wiring 3 is formed so as to be routed around the sensor electrode 2, and one end of the outer peripheral wiring 3 is a transparent substrate. It is gathered on one side. An external connection terminal portion G for connecting to an external device such as a control unit is provided at the end of the outer peripheral wiring 3.
Here, there are an active area (a rectangular area surrounded by a two-dot chain line in the figure) corresponding to an area where the touch position of the touch panel is detected, and a frame area surrounding the active area. A non-active region (a frame-shaped region surrounded by the outer shape of the touch panel sensor and a two-dot chain line in the drawing) having the outer peripheral wiring 3 and the external connection terminal portion G is shown.
Therefore, the decoration layer 4 of the touch panel sensor 10 in FIG. 3C is provided in the inactive region excluding the external connection terminal portion G as described above.

FIG. 4 is a cross-sectional view showing a housing in which a touch panel sensor is incorporated.
The frame of the casing 70 in which the touch panel sensor 10 is loaded covers the external connection terminal portion G on which the decorative layer 4 is not formed, so that it is not visually recognized from the operation side of the touch panel.

  Hereinafter, each component of the touch panel sensor of the present invention will be described.

<Transparent substrate>
The transparent base material 1 should just have a light transmittance, and can use the transparent base material currently used for the conventionally well-known touch panel.
As the shape, a plate shape, a sheet shape, a film shape, a film shape, or the like can be used, and as a material, a material composed of a synthetic resin such as glass, polyethylene terephthalate, polypropylene, polymethyl methacrylate, or the like can be used. . When a transparent film-like material is used as the transparent substrate 1, it is suitable for production of a roll-to-roll system.

The thickness of the transparent substrate 1 is appropriately selected according to the type of target touch panel, but is preferably in the range of 20 μm to 1500 μm, and preferably in the range of 20 μm to 1000 μm. More preferably, it is further in the range of 20 μm to 300 μm.
This is because if the thickness of the transparent substrate 1 is thicker than the above range, it may be difficult to make the touch panel sensor thin. On the other hand, if it is thinner than the above range, handling on the production line becomes difficult. Because there is a possibility.

  The transparent substrate 1 preferably transmits more light. Specifically, the transmittance in the visible light region is preferably 80% or more, and more preferably 90% or more. In addition, let the light transmittance of the transparent base material 1 be the value (total light transmittance) measured by the method prescribed | regulated by JISK7105.

The transparent substrate 1 may be subjected to a surface treatment such as a primer treatment in order to improve the adhesion with the sensor electrode 2 described later.
In addition, the transparent substrate 1 has good adhesion with the transparent substrate 1 and adhesion with the sensor electrode and the outer peripheral wiring as an undercoat layer, and in the pattern formation process of the sensor electrode and the outer peripheral wiring. Those that do not dissolve or swell with respect to the liquid to be used can be used, and as the material of the anchor layer, thermoplastic resins, two-component curable resins, ionizing radiation curable resins, and the like can be used as appropriate.
Further, the transparent base material 1 may be formed with a refractive index adjusting layer made of silicon oxide, niobium oxide or the like.

<Sensor electrode>
The sensor electrode 2 is formed in a pattern on the above-described transparent substrate 1 and has a function of detecting position information of input by an external conductor (for example, a finger).
Since the sensor electrode 2 is generally visually recognized by an operator of the touch panel, it is generally formed of a light transmissive conductive material. In addition, the formation pattern portion of the fine mesh-like transparent electrode that is not visually recognized on the screen visually recognized by the user may be formed from a material that does not transmit light.

  As the sensor electrode 2, a sensor electrode used in a conventionally known touch panel sensor can be used as long as it has transparency. For example, indium tin oxide (ITO), indium oxide, indium zinc oxide (IZO), etc. Indium oxide-based materials, metal oxides such as tin oxide (SnO2) and zinc oxide (ZnO), conductive polymer materials such as polyaniline and polyacetylene, etc. can be used. Among them, indium tin oxide (ITO) is used. Although preferred, the material is not limited to this. In addition, when the sensor electrode has a plurality of, for example, a first transparent electrode and a second transparent electrode, the plurality of sensor electrodes may be made of the same kind of conductive polymer material, and different types of conductive high Molecular materials may be used.

The sensor electrode 2 is preferably in the form of a film, and the thickness thereof is preferably in the range of 10 nm to 500 nm, more preferably in the range of 10 nm to 300 nm, and in the range of 10 nm to 200 nm. More preferably.
If the film thickness of the sensor electrode 2 is thicker than the above range, there may be a problem in transparency. On the other hand, if it is thinner than the above range, there may be a problem that predetermined conductivity cannot be obtained. Because there is.

  The film of the sensor electrode 2 preferably has a low surface resistance in order to reliably transmit the detected input position information to an external information processing unit, for example, within a range of 200Ω / □ or less. The surface resistance of the sensor electrode film can be confirmed by using a Loresta GP MCP-T601 type (conforming to JIS K7194) by a four-terminal four-probe method and a constant current application method.

  Examples of the method for forming the sensor electrode 2 include a photolithography method and a screen printing method, among which the photolithography method is preferably used. This is because, when forming the sensor electrode, it is possible to stably form a highly accurate pattern such as a line width and uniformity thereof. In addition, when forming sensor electrodes on both sides of a transparent substrate in a pattern, both sides can be patterned simultaneously by a photolithography method, the positional accuracy is good, and a fine pattern can be formed with high precision. Because it becomes.

  As the pattern shape of the sensor electrode 2, the pattern shape of the sensor electrode that can function as a touch panel sensor can be selected as appropriate. For example, the strip shape shown in FIGS. Any pattern shape can be used.

<Peripheral wiring>
The outer peripheral wiring 3 of the present invention is used to send a signal of position information detected by the sensor electrode 2 described above to an information processing unit that is provided outside the touch panel sensor.
The outer peripheral wiring 3 is formed on the transparent substrate 1 and connected to the sensor electrode 2.
A decorative layer 4 is formed on the outer peripheral wiring 3.

The outer peripheral wiring 3 is generally formed outside a region visually recognized by a user of the touch panel sensor 10. Therefore, the material constituting the outer peripheral wiring 3 may be a conductive material, and it does not matter whether or not it has optical transparency.
Examples of the material used for the peripheral wiring 3 include a single metal having high conductivity, a composite of metal, a composite of metal and metal compound, a metal alloy, and the like. Specifically, gold, Metal simple substance such as copper, silver, aluminum, molybdenum, tantalum, titanium, tungsten, etc., composite of metal such as MAM (Mo-Al-Mo, ie, three-layer structure of molybdenum, aluminum, and molybdenum), chromium oxide / chromium laminate Examples thereof include a composite of a metal such as a body and a metal compound, a silver alloy, a copper alloy, and a metal alloy such as APC (Au, Pd, Cu, that is, silver, palladium, copper). Especially, it is preferable to use silver or copper from a viewpoint of exhibiting the effect of this invention more.
Further, a resin composition may be appropriately mixed in the metal material constituting the outer peripheral wiring 3.
In addition, when wiring is formed by a printing method such as screen printing, it contains metal particles such as silver or copper having a particle diameter of several tens of nanometers to several μm and a resin binder as a wiring forming material, and a solvent is used. A metal particle-containing paste appropriately prepared by use is widely used. As the resin binder, for example, a single substance or a mixture of acrylic resin, epoxy resin, polyester resin, polyvinyl chloride, polyvinyl alcohol, polyvinyl acetate, polystyrene, or the like is used.

  The peripheral wiring 3 is preferably a fine wiring pattern, and the width dimension is not particularly limited. For example, when the wiring is formed by photolithography, the width of the wiring is preferably in the range of 5 μm to 200 μm. On the other hand, when the outer peripheral wiring is formed by printing such as screen printing, the width of the outer peripheral wiring is preferably in the range of 20 μm to 300 μm.

  The peripheral wiring 3 is preferably in the form of a film, and the thickness thereof is not particularly limited. For example, when the outer peripheral wiring is formed by a photolithography method, the thickness of the outer peripheral wiring is preferably in the range of 10 nm to 500 nm. On the other hand, when the outer peripheral wiring is formed by printing such as screen printing, the thickness of the outer peripheral wiring is preferably in the range of 5 μm to 20 μm.

  A method for forming the outer peripheral wiring 3 can be the same as the wiring used for a general touch panel sensor, and examples thereof include a photolithography method and a screen printing method. Among them, a photolithography method is used. It is preferable. This is because it is possible to stably form a high-definition pattern such as the width of the wiring and its uniformity.

The outer peripheral wiring 3 can have an external connection terminal at one end thereof. An external connection terminal part is a member which connects a touch panel sensor and the information processing part which has the exterior of a touch panel sensor.
As the material of the external connection terminal, the same material as that of a connection terminal used in a conventionally known touch panel sensor can be used. For example, gold, copper, silver, aluminum, molybdenum, tantalum, titanium, tungsten, or the like is used. be able to.
As shown in FIG. 3A, a decorative layer to be described later is not formed on the external connection terminal portion G having external connection terminals.

<Decoration layer>
The decoration layer 4 is visually recognized as white opaque by an operator of the touch panel in a state where the decoration layer 4 is incorporated in the information terminal device 100 as the touch panel sensor 10 as shown in FIG.
The decorative layer 4 shields the light from the display device 30 so that the outer peripheral wiring 3 and the display device 30 which are the lower layers of the decorative layer 4 are not visually recognized, and reflects the light from the cover sheet 40 side and reflects white light. It has the function used as the design which exhibits.

In the decorative layer 4 of the present invention, the film thickness of the white decorative layer formed on the outer peripheral wiring on the front and back sides is the film thickness necessary for shielding the shape of the outer peripheral wiring 3 only on one side of the cover sheet. For example, it can be distributed in half, and the thickness of the white decorative layer on each side can be reduced.
That is, the required film thickness of the white decorative layer is only 30 to 40 μm when only one side of the cover sheet is provided, but the white decorative layer is distributed and provided on both the front and back surfaces of the transparent substrate. In this case, the outer peripheral wiring 3 can be shielded by shielding light at 15 to 20 μm.
As an advantage that the decorative layer 4 can be manufactured thinly on each side of the transparent substrate 1 as described above, when the white decorative layer is formed by a photolithography method, compared with a case where the film thickness is thick. The resist is easy to apply, and the photosensitivity is improved by improving the light transmittance at the time of exposure, thereby improving the curability of the exposed film.

As shown in FIGS. 3A to 3D, the decorative layer 4 is a non-active region including the outer peripheral wiring on both the front and back surfaces of the transparent substrate 1 in the touch panel sensor 10, and at least the external connection terminal portion. It is formed in a region excluding a part of G.
Thus, the decoration layer 4 is provided in the non-active area | region of both the front and back of the transparent base material 1, and the thickness of the white type decoration layer of each surface is different from the case where it forms only on one side. Can be thinned. When the touch panel sensor 10 is mounted on various devices, there is an advantage that it does not become an obstacle such as assembly.

The decorative layer 4 is formed of a layer containing a color pigment for expressing a white color in a resin binder.
As a color pigment used for the decoration layer 4, a white pigment is usually used as a main pigment. Furthermore, in order to express white colors such as ivory and light gray other than pure colors, color pigments exhibiting any color including black pigments can be used in combination.
Specifically, titanium oxide, silica, talc, kaolin, clay, barium sulfate, calcium hydroxide, and the like can be used as the white pigment.

  The size of the color pigment particles is usually 1 μm or less in average particle size, preferably about 0.03 to 0.3 μm.

  The color pigment may be appropriately selected according to the white color to be expressed, and only the white pigment may be used. Accordingly, the color pigments may be used alone, or a plurality of types of color pigments of the same type or different colors may be used.

  As the material of the resin binder, one or more resins appropriately selected from thermoplastic resins, thermosetting resins, and photosensitive resins can be used.

As the thermoplastic resin, for example, one or more of acrylic resin, vinyl acetate resin, acrylonitrile resin, vinyl chloride resin, polyethylene, polypropylene, and the like can be used.
As the thermosetting resin, for example, one or more of acrylic resin, epoxy resin, polyester resin, polyimide resin, and the like can be used.
Examples of the photosensitive resin include photosensitive resins having a photoreactive group such as an acrylic resin, an epoxy resin, a polyimide resin, a polyvinyl cinnamate resin, and a cyclized rubber. One or more types can be used. In the acrylic resin, for example, a photosensitive resin composed of an alkali-soluble resin, a polyfunctional acrylate monomer, a photopolymerization initiator, and other additives can be used as a resin component of the resin binder.

Next, an embodiment of the touch panel sensor manufacturing method of the present invention will be described.
The touch panel sensor manufacturing method of the present invention has sensor electrodes 2 on both front and back surfaces of a thin plate-like transparent base material 1, an active region having the sensor electrodes corresponding to each of the front and back surfaces of the transparent base material 1, and A method of manufacturing a touch panel sensor having an inactive region other than the active region, the step of forming at least the outer peripheral wiring 3 and the external connection terminal portion G in the inactive regions on both the front and back surfaces of the transparent substrate 1, and a transparent substrate And a step of forming a white decorative layer in an inactive region including the outer peripheral wiring 3 on both the front and back surfaces of 1 and excluding at least a part of the external connection terminal portion G.
The formation process of the sensor electrode 2 is formed in the active region on both the front and back surfaces of the transparent substrate 1 by the method described above for the sensor electrode. Moreover, the formation process of the outer periphery wiring 3 is formed in the active area | region on both front and back surfaces of the transparent base material 1 by the method of description of said outer periphery wiring.

As described above, according to the touch panel sensor of the present invention and the manufacturing method thereof, the overall film thickness of the front and back surfaces of the touch panel sensor is thin, and the difference in level that occurs when the decorative layer is thick is small. Therefore, it is possible to apply the coating liquid evenly to provide a protective layer on the transparent substrate including the decorative layer, and to form an adhesive evenly with the cover sheet and the display device. It becomes possible to bond with high dimensional accuracy.
Furthermore, compared with the case where a decorative layer is provided on the cover sheet side, it is not necessary to form a decorative layer on the cover sheet, a clear cover sheet can be used, and the cost is reduced.
Moreover, it is also possible to suppress migration of the outer peripheral wiring 3 by covering the outer peripheral wiring 3 with the decorative layer 4.

  Examples of the touch panel sensor and the manufacturing method thereof according to the present invention will be described below with reference to the embodiments shown in FIGS.

(Example)
First, a tempered glass having a thickness of about 0.5 mm is prepared as the cover sheet 40 of the information terminal device 100 shown in FIG.
Next, a PET (polyethylene terephthalate) film having a thickness of about 100 μm is prepared as the transparent substrate 1 of the touch panel sensor 10 shown in FIGS.
Further, an ITO thin film with a thickness of about 30 nm is formed on the entire front and back surfaces of the PET film as the transparent substrate 1, and a Cu thin film with a thickness of about 200 nm is formed thereon.
A photoresist is applied to the entire surface of the formed Cu thin film by photolithography and dried, and then exposed to ultraviolet light through a photomask and developed to form a resist pattern. The photomask used at this time has a portion corresponding to the active region as a pattern of the sensor electrode, and a portion corresponding to the non-active region has a whole surface including the peripheral wiring. In the active area, a resist layer corresponding to the pattern of the sensor electrode remains, and in the inactive area, a resist layer corresponding to the entire surface including the peripheral wiring remains.
Next, the copper thin film and the ITO film in the active region and the inactive region are first etched using an etching solution, and then the resist layer is peeled off.
Next, a photoresist is applied only to the inactive area and dried, and then exposed to ultraviolet light through a photomask and developed to form a resist pattern. The photomask used at this time is an outer peripheral wiring pattern, and a resist layer corresponding to the outer peripheral wiring pattern remains. After etching using the etching solution, the resist layer is peeled off.
Through the above etching process, the pattern of the ITO thin film sensor electrode is formed in the active region, and the pattern of the outer peripheral wiring is formed in the inactive region.
The above steps are formed on the front and back surfaces of the transparent substrate 1 so that only ITO as a transparent electrode pattern that is the sensor electrode 2 remains in the active region, and Cu as the outer peripheral wiring 3 remains in the inactive region. (FIGS. 3B and 3D).
Next, a white decorative layer 4 is formed by photolithography in a non-active region including the outer peripheral wiring 3 on both the front and back surfaces to obtain the touch panel sensor 10 (FIGS. 3A and 3C).
As a coating liquid for forming said white type | system | group decorating layer 4, what mixed the titanium oxide as a white pigment in the acrylic negative photosensitive material is used.
Next, the cover sheet 40 made of tempered glass and the touch panel sensor 10 in which the white decorative layer is formed in the inactive region including the outer peripheral wiring 3 are bonded with an adhesive (OCA: optical adhesive). The touch panel device 20 is obtained by bonding.
Next, the information terminal device 100 having a touch sensor function is obtained by bonding the display device 30 and the touch panel device 20 together with an adhesive resin (FIG. 2).

DESCRIPTION OF SYMBOLS 1 Transparent base material 2 Sensor electrode 3 Perimeter wiring 4 Decorating layer 10 Touch panel sensor 20 Touch panel device 30 Display device 40 Cover sheet 50 Detection control unit 60 Display control unit 70 Case 100 Information terminal device

Claims (2)

A touch panel sensor having sensor electrodes on both front and back surfaces of a thin plate-like transparent substrate, and having an active region having the sensor electrode and an inactive region other than the active region corresponding to each of the front and back surfaces of the transparent substrate Because
At least the outer peripheral wiring and the external connection terminal portion are formed in the inactive areas on the front and back surfaces of the transparent base material,
A white decorative layer is formed in the non-active region including the outer peripheral wiring on both the front and back surfaces of the transparent base material, and at least a part of the external connection terminal portion is formed. A featured touch panel sensor. A touch panel sensor having sensor electrodes on both front and back surfaces of a thin plate-like transparent substrate, and having an active region having the sensor electrode and an inactive region other than the active region corresponding to each of the front and back surfaces of the transparent substrate A manufacturing method of
Forming at least outer peripheral wiring and external connection terminal portions in the inactive regions on both the front and back surfaces of the transparent substrate;
Forming a white decorative layer in the non-active region including the outer peripheral wiring on both the front and back surfaces of the transparent base material, at least in a region excluding a part of the external connection terminal portion. A method for manufacturing a touch panel sensor, comprising:

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