TW201537429A - Laminate, method for producing laminate, capacitive touch panel and image display device - Google Patents

Abstract

Provided are: a laminate wherein a defect does not occur in a decorative print layer that is formed using a black ink in the peripheral portion of the back surface of a transparent panel substrate when a transparent electrode layer or a wiring layer of a touch panel is patterned by laser processing; a method for producing a laminate; a capacitive touch panel; and an image display device. A top plate (11) is provided with: a transparent panel substrate (1); a decorative print layer (3) having a two-layer structure, which is formed in the peripheral portion of the back surface of the transparent panel substrate (1) and is composed of a black decorative print layer (3B) and a white decorative print layer (3W); a planarization resin layer (4) which is formed on a surface of the transparent panel substrate (1), on said surface the decorative print layer (3) being formed, so as to cover a region ranging from the decorative print layer (3) to the transparent panel substrate (1); and a transparent electrode layer (6) which is formed on the back surface of the planarization resin layer and has a wiring layer (6A). The wiring layer (6A) and the transparent electrode layer (6) of the top plate (11) are patterned by laser processing, which uses an infrared laser, from the back surface side of the decorative print layer (3). The second layer which is in contact with the planarization resin layer (4) is the white decorative print layer (3W).

Description

Laminated body, manufacturing method of laminated body, static capacitance type touch panel and image display device

The present invention relates to a laminated body, a method of manufacturing a laminated body, a capacitive touch panel, and an image display device, and more particularly to a laminated body or a laminated body having a decorative printed layer formed on an outer edge portion of a back surface of a transparent panel substrate. Manufacturing method, static capacitance type touch panel and image display device. The present application claims priority on the basis of the Japanese Patent Application No. 2014-060098, filed on March 24, 2014, which is hereby incorporated by reference.

Smart phones and tablet computers that can be easily operated by the use of touch panels have become widespread, and thinner, lighter, and lower-cost touch panels have become an urgent issue.

There are various methods for detecting the touch panel, for example, a resistive film method in which two resistive films are stacked to specify a predetermined position, or a surface acoustic wave method in which an ultrasonic wave or a surface acoustic wave is generated on the surface of the panel to perform position detection. The touch panel used in the above-mentioned smart phone or tablet computer must be touched, dragged, or pinched out on the screen in order to enlarge the image, so that the pinch out is made on the screen. The two fingers are compact and have a degree of freedom in operations such as pinch in operations. Therefore, in the current situation, a transparent electrode is used to form an xy matrix, and a capacitive touch panel capable of simultaneously detecting a plurality of indicated positions has become mainstream.

In the past, in the process of a capacitive touch panel, the detection shape of the contact is detected. In the step of applying the transparent conductive film to the substrate, only the portion necessary for the detection is left by etching, and the excess portion is removed.

Further, the lead wires for connecting the detecting portion and the external circuit are formed on the outer peripheral portion of the touch panel by silver paste and screen printing. However, as the number of detecting portions on the touch panel increases, the wiring width becomes It is finer, so its limit is produced by the printing method, and is currently formed by etching like the transparent conductive film.

The etching method is largely divided into dry etching by wet etching of a chemical liquid and transmission laser irradiation. The wet etching has many manufacturing steps because it is repeatedly washed, and the dry etching has the advantage that the manufacturing steps can be simplified and the cost can be reduced.

Further, in order to cover the above-mentioned lead-out wiring, the touch panel is mainly printed on the outer peripheral portion, which is called decorative printing, mainly using black ink.

In other words, in an image display panel such as a conventional electronic device or a capacitive touch panel provided on the surface thereof, various designs are added to the peripheral region of the image display area as a decorative region, thereby increasing the value of the product. However, in the peripheral region, since the wiring pattern electrically connected to the transparent electrode is formed, irregularities corresponding to the shape of the wiring pattern may be generated on the surface of the touch panel when the laminated body is formed. In this case, it becomes impossible to maintain the desired flatness of the touch panel, and there is a problem that the value of the product is impaired.

Further, when the panel substrate is decorated with an optical double-sided tape attached thereto, since a bubble or an air layer is generated inside the step caused by the decoration, the ultraviolet curable resin is filled. The panel substrate is formed into a smooth shape without distortion by filling a step caused by the decorative printed layer on the back surface of the panel substrate and smoothing the back surface of the panel substrate.

[Advanced technical literature]

[Patent Document 1]: JP-A-2014-000725

[Patent Document 2]: JP-A-2013-246885

[Patent Document 3]: Japanese Laid-Open Patent Publication No. 2001-202826

However, in the wet etching process by the chemical liquid, since there are steps such as water rinsing or etching, it is necessary to select a resin or a substrate having solvent resistance or alkali resistance. In the case where sufficient resistance is not obtained, the film adhesion or the electrical conductivity of the sheet resistance value may be deteriorated. And the number of steps of wet etching is also a cause of a decrease in yield.

On the other hand, laser processing has a degree of freedom compared to the selection of a resin or a substrate in a wet process due to a dry process, and the number of processing steps is small. Compared to the current wet process, there must be 8 steps, and the laser can be patterned in one step.

However, in the conventional capacitive touch panel, when the transparent electrode layer or the wiring layer of the touch panel is patterned by laser processing, it is generated by black ink in the outer edge portion of the back surface of the transparent panel substrate. The formed decorative printed layer is damaged to impair the defects such as appearance.

Therefore, in view of the above-mentioned conventional problems, it is an object of the present invention to provide a transparent electrode layer or a wiring layer of a touch panel by laser processing without being outside the outer edge of the back surface of the transparent panel substrate. A laminated body in which a decorative printed layer formed of black ink is used to produce defects, a method of manufacturing a laminated body, a capacitive touch panel, and an image display device.

Other objects and advantages of the present invention will become more apparent from the embodiments described herein.

In the present invention, the decorative printing portion is formed into a two-layer structure of black and white, and the side on which the infrared laser beam is irradiated is a white portion, whereby infrared rays are absorbed in the white portion, and infrared rays reaching the black portion are reduced. The amount of arrival is used to reduce the damage of the black portion of the decorative printed layer.

That is, the present invention is a laminated body comprising: a transparent panel substrate; a decorative printed layer having a two-layer structure formed on an outer edge portion of the back surface of the transparent panel substrate, laminated in parallel with the transparent panel substrate; and a planarizing resin a layer formed on a surface of the transparent panel substrate on which the decorative printed layer is formed to cover a region extending over the decorative printed layer and the transparent panel substrate, and a transparent electrode layer formed on a back surface of the planarizing resin layer And a wiring layer; in the decorative printed layer of the two-layer structure, the second layer in contact with the planarizing resin layer is white.

Further, the laminated body of the present invention may have a configuration in which the decorative printed layer is directly laminated on the back surface of the transparent panel substrate.

The laminate of the present invention may be configured such that the decorative printed layer is interposed between the anchor layer covering the back surface of the transparent panel substrate.

Moreover, the laminated body of the present invention may have a configuration in which the amount of infrared absorption of the second layer in the decorative printed layer is 92% or more and 95% or less at a wavelength of 1060 nm.

Furthermore, the laminated body of the present invention may be configured such that the transparent conductive layer is made of a material containing a silver nanowire or a Cu nanowire.

The present invention relates to a method for producing a laminated body comprising: a transparent panel substrate; and a decorative printed layer having a two-layer structure formed on an outer edge portion of the back surface of the transparent panel substrate, and laminated in parallel with the transparent panel substrate; a resin layer formed on the surface of the transparent panel substrate on which the decorative printed layer is formed to cover the decorative printed layer and the transparent layer a region of the panel substrate; and a transparent electrode layer formed on the back surface of the planarizing resin layer and having a wiring layer; and in the decorative printed layer having the two-layer structure, the second layer contacting the planarizing resin layer is white; The wiring layer and the transparent electrode layer on the back surface of the decorative printed layer of the laminated body are patterned by laser processing using an infrared laser as a laser light source.

The present invention relates to a capacitive touch panel comprising: a transparent panel substrate; a decorative printed layer having a two-layer structure, the outer edge portion of the back surface of the transparent panel substrate being formed in parallel with the transparent panel substrate; and a planarizing resin a layer formed on a surface of the transparent panel substrate on which the decorative printed layer is formed to cover a region extending over the decorative printed layer and the transparent panel substrate, and a transparent electrode layer formed on a back surface of the planarizing resin layer And a wiring layer; the second printed layer of the two-layer structure is white in contact with the planarizing resin layer; and the wiring layer and the transparent electrode layer on the back surface of the decorative printed layer are Patterned by laser processing using infrared lasers.

The capacitive touch panel of the present invention may be configured such that the decorative printed layer is directly laminated on the back surface of the transparent panel substrate.

Further, the capacitive touch panel of the present invention may be configured such that the decorative printed layer is provided with an anchor layer covering the back surface of the transparent panel substrate.

Further, the capacitive touch panel of the present invention may be configured such that the infrared absorption amount of the second layer in the decorative printed layer is 92% or more and 95% or less at a wavelength of 1060 nm.

Furthermore, the electrostatic capacitance type touch panel of the present invention may be configured such that the transparent conductive layer is made of a material including a silver nanowire or a Cu nanowire.

The invention is an image display device, which has static electricity in the display screen The capacitive touch panel is characterized in that: the capacitive touch panel includes: a transparent panel substrate; and a decorative printed layer having a two-layer structure, the outer edge portion of the transparent panel substrate is formed on the outer edge portion and the transparent panel substrate a flattening resin layer formed on a surface of the transparent panel substrate on which the decorative printed layer is formed to cover a region extending over the decorative printed layer and the transparent panel substrate, and a transparent electrode layer formed on the flat surface The back surface of the resin layer has a wiring layer; and in the decorative printed layer of the two-layer structure, the second layer contacting the flattening resin layer is white; the wiring layer on the back surface of the decorative printed layer and the above The transparent electrode layer is patterned by laser processing using infrared laser.

The image display device of the present invention may be configured such that the decorative printed layer is directly laminated on the back surface of the transparent panel substrate.

Further, the image display device of the present invention may be configured such that the decorative printed layer is provided with an anchor layer covering the back surface of the transparent panel substrate.

Further, in the image display device of the present invention, the infrared ray absorption amount of the second layer in the decorative printed layer is 92% or more and 95% or less at a wavelength of 1060 nm.

Furthermore, the image display device of the present invention may be configured such that the transparent conductive layer is made of a material including a silver nanowire or a Cu nanowire.

The present invention can provide a laminated body, a method of manufacturing a laminated body, a capacitive touch panel, and an image display device, which are characterized in that the decorative printed portion is formed into a black and white two-layer structure, and the side of the irradiated infrared laser is irradiated In the white portion, infrared rays are absorbed in the white portion, and the amount of infrared rays reaching the black portion is reduced, whereby the damage of the black portion of the decorative printed layer can be reduced, and the touch panel can be processed by laser processing. When the transparent electrode layer or the wiring layer is patterned, A defect is formed in the decorative printed layer formed by the black ink in the outer edge portion of the back surface of the transparent panel substrate.

1, 7‧‧‧ transparent panel substrate

2‧‧‧ anchor layer

3‧‧‧Plus printing layer

3B‧‧‧Black decorative printing layer

3W‧‧‧White decorative printing layer

4‧‧‧Flating resin layer

5‧‧‧Protective layer

6, 8‧‧‧ transparent electrode layer

6A, 8A‧‧‧ wiring layer

11‧‧‧ top board

12‧‧‧floor

100‧‧‧Static Capacitive Touch Panel

1A and 1B are views showing a structure of a capacitive touch panel according to an embodiment of the present invention, and Fig. 1A is a plan view of a capacitive touch panel, and Fig. 1B is a cross-sectional view taken along line AA' of Fig. 1A.

2 is a process diagram showing an example of a manufacturing procedure of the above-described capacitive touch panel.

3A, 3B, 3C, 3D, and 3E are schematic cross-sectional views showing a process of forming a top plate in the first step to the fourth step of the manufacturing step, and Fig. 3A shows the first step, Fig. 3B. After the first step, FIG. 3C shows the second step, FIG. 3D shows the third step, and FIG. 3E shows the fourth step.

4A, 4B, and 4C are cross-sectional views schematically showing the formation process of the top plate in the fifth step to the eighth step of the manufacturing step, wherein FIG. 4A shows the fifth step, and FIG. 4B shows the seventh step. 4C indicates the eighth step.

5A, 5B, and 5C are cross-sectional views schematically showing a process of forming a top plate in the ninth step of the manufacturing step, wherein FIG. 5A shows a state before the fifth step, and FIG. 5B shows a state in which a transparent electrode layer is formed. Fig. 5C shows a state in which the transparent electrode layer is patterned.

Fig. 6 is a view showing the results of the evaluation of the identification of the decorative printed layer of the top plate.

7A and 7B are cross-sectional views schematically showing a process of bonding the top plate and the bottom plate in the tenth step of the above manufacturing step, and Fig. 8A shows the bonding before, and Fig. 8B shows the bonding after the bonding.

8 is a view showing an image display device with a touch panel including a capacitive touch panel.

Hereinafter, the form for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below, and various modifications may be made without departing from the spirit and scope of the invention. Further, the dimensions of the respective portions in the drawing are schematic, and in particular, the cross-sectional views are dimensions which are emphasized in the thickness direction in order to clearly show the structure.

The present invention is applicable to, for example, the capacitive touch panel 100 of the configuration shown in FIGS. 1A and 1B.

1A and FIG. 1B are views showing a configuration example of a capacitive touch panel 100 constructed by the structure of the present invention. FIG. 1A is a front view showing the capacitive touch panel 100, and FIG. 1B is a view showing AA of FIG. 1A. 'Line profile.

The static capacitance type touch panel 100 is composed of a laminate of a top plate 11 and a bottom plate 12.

In the static capacitance type touch panel 100, the top plate 11 is formed of a transparent panel substrate 1 and a black layer formed on the outer edge of the back surface of the transparent panel substrate 1 via an anchor layer 2 covering the back surface of the transparent panel substrate 1. The decorative printed layer 3 having a white two-layer structure is formed to cover the flat resin layer 4 over the back side of the transparent panel substrate 1 and the back side of the decorative printed layer 3, and the protective layer 5 is formed thereon. The transparent electrode layer 6 having the wiring layer 6A on the back surface of the planarizing resin layer 4 is constituted.

Further, the top plate 11 may directly form the decorative printed layer 3 on the outer edge of the back surface of the transparent panel substrate 1, or may have a structure in which the anchor layer 2 is omitted.

Further, the bottom plate 12 is composed of a transparent panel substrate 7 and a transparent electrode layer 8 having a wiring layer 8A formed on the entire transparent panel substrate 7.

The transparent electrode layer 6 having the wiring layer 6A formed on the top plate 11 and the transparent electrode layer 8 having the wiring layer 8A formed on the bottom plate 12 are disposed opposite to each other by being bonded to the back surface of the top plate 11 According to the function of the sensor section. The wiring drawn from the transparent electrode layers 6 and 8 via the wiring layers 6A and 8A is connected to an external circuit through the flexible printed circuit board (FPC) 9.

The electrostatic capacitance type touch panel 100 is manufactured by performing the processes of the first to tenth steps (S1 to S10) in accordance with, for example, the steps shown in the step diagram of FIG.

In other words, first, in the first step S1, the anchor layer 2 covering the entire back surface of the transparent panel substrate 1 is formed on the back surface of the flexible transparent panel substrate 1 (see FIGS. 3A and 3B).

Then, in the second step S2, the decorative printed layer 3 having a two-layer structure of black and white is formed on the back surface of the transparent panel substrate 1 via the anchor layer 2 on the back surface of the transparent panel substrate 1 (see the figure). 3C).

The decorative printed layer 3 is a black decorative printed layer 3B formed of black ink laminated on the first layer in contact with the back surface of the transparent panel substrate 1 and a second layer contacting the planarized resin layer 4 by white A two-layer structure of a white decorative printed layer 3W formed of ink.

Further, the first step S1 may be omitted, and in the second step S2, the two-layer structure of the decorative printed layer 3 may be directly formed on the outer edge portion of the back surface of the transparent panel substrate 1.

Next, in the third step S3, the inside of the step of the decorative printed layer 3 and the decorative printed layer on the back surface of the flexible transparent panel substrate 1 on which the decorative printed layer 3 having the two-layer structure is formed is formed. 3 The back surface is coated with an ultraviolet curable resin to form a planarizing resin layer 4 (see FIG. 3D).

Next, in the fourth step S4, the protective layer 5 is entirely formed on the back surface of the flattening resin layer 4 (see FIG. 3E).

In this way, the top plate material 10A composed of the transparent panel substrate 1, the decorative printed layer 3, the flattening resin layer 4, and the like is formed.

Here, the decorative printed layer 3 is formed on the outer edge portion of the liquid crystal screen which constitutes a smart phone, a tablet terminal or the like, and a layer formed for the purpose of forming an electrode necessary for the touch panel to function, An area such as wiring or the like is covered as an edge area so as not to be recognized from the outside. The decorative printed layer 3 is formed by superposing and coating a plurality of colored inks using urethane by screen printing. In order to apply a predetermined thickness so that the electrode or the wiring formed in the edge region does not permeate, the thick coating applied once is likely to be uneven. Therefore, it is necessary to form the coating layer each time to be thin and divided into a plurality of times. Multi-layer printed layer. For example, in the case of a concentrated ink which is difficult to transmit light, when a printing layer is formed by secondary coating and a light color (white or the like) ink which is easy to transmit light is required, it is necessary to carry out overlapping coating four times or so. When the coating thickness per application is about 8 μm, the layer of the pale ink has a thickness of about 32 μm.

In the fifth step S5, as shown in FIG. 4A, the flattening resin layer 4 is subjected to a pressure treatment in a state in which the back surface of the transparent panel substrate 1 is bonded to the flat surface of the flat substrate 30.

Specifically, in the fifth step S5, a bonding apparatus is used which adsorbs, for example, a glass plate as a flat substrate 30 before the top plate 20 having a suction function, and the flat substrate 30 and the roller 21 are sandwiched by the flat substrate 30. The top plate member 10A is held, and the flat plate 30 is rolled in the direction of the arrow, whereby the flat substrate 30 is bonded to the top plate member 10A, and the flattening resin layer 4 is applied from the side of the transparent panel substrate 1 by using the bonding device. Pressurizing the roller 21 Reason.

As described above, the flattening resin layer 4 is pressed by the roller 21 from the transparent panel substrate 1 side, and the flat substrate 30 is bonded to the flattening resin layer 4 to form the planarizing resin. The flat surface of the flat substrate 30 is transferred to the back surface of the layer 4, and the back surface of the flattening resin layer 4 is a flat surface having, for example, the surface accuracy of the glass plate used as the flat substrate 30, that is, the flatness or the surface roughness. .

Further, when the planarizing resin layer 4 is pressed by the roller 21 from the side of the transparent panel substrate 1 and the flat substrate 30 is bonded to the back surface of the planarizing resin layer 4, the roller 21 is used. The rolling speed is set to a predetermined constant speed, and the air bubbles remaining in the step portion generated by the decorative printed layer 3 of the top plate 1 can be reduced.

In the next sixth step S6, the planarizing resin layer 4 of the top sheet 10A subjected to the above-described pressurization treatment is further subjected to autoclaving treatment.

Specifically, in the sixth step S6, the suction of the top plate 20 on the flat substrate 30 is stopped, and the top plate 10A is detached from the top plate 20 together with the flat substrate 30, and placed in a high pressure sterilization pressure cooker to apply a high voltage. Sterilization treatment.

The bubbles remaining in the step portion generated by the decorative printed layer 3 of the top sheet 10A subjected to the above-described pressurization treatment can be further reduced by the autoclaving treatment, and the residual printed layer can be eliminated. The inner image shows the bubbles in the area.

Next, in the next seventh step S7, the planarizing resin layer 4 of the top sheet 10A subjected to the above autoclaving treatment is cured.

Specifically, in the seventh step S7, as shown in FIG. 4B, the top plate 10A subjected to the above-described pressurization treatment and autoclave treatment is applied from the flat substrate 30 side. The flattening resin layer 4 is irradiated with ultraviolet rays by the ultraviolet light source 22 to harden the planarizing resin layer 4 described above.

Here, by using the transparent glass plate having a high ultraviolet transmittance as the flat substrate 30, the flattening resin layer 4 can be cured with good efficiency by irradiating ultraviolet rays from the flat substrate 30 side.

In addition, as the flat plate 30, for example, a polycarbonate substrate or an acrylic resin substrate to which ultraviolet rays are subjected to release treatment can be used instead of the glass plate.

In the next eighth step S8, as shown in FIG. 4C, the flat substrate 30 is peeled off from the cured planarizing resin layer 4.

Further, in order to facilitate the peeling of the flat substrate 30 from the hardened flat resin layer 4, the base material is composed of a glass plate having a thickness of, for example, 0.5 mm to 2 mm, and further preferably a water repellent or a release agent is applied. Release treatment on the surface.

Next, in the next ninth step S9, as shown in FIG. 5A, FIG. 5B, and FIG. 5C, the transparent electrode layer 6 having the wiring layer 6A is formed on the back surface of the planarizing resin layer 4 of the top plate 10B, that is, the top plate is completed. 11.

Specifically, in the ninth step S9, the transparent electrode layer 6 having the wiring layer 6A is formed on the back surface of the planarizing resin layer 4 of the top plate 10B (see FIGS. 5A and 5B), and further, as shown in FIG. 5C. The top plate 11 is completed by patterning the transparent electrode layer 6 having the wiring layer 6A by laser processing using an infrared laser as a laser light source.

In this manner, the top plate 10B having the structure shown in Figs. 3A and 3B is formed by the processes of the first to ninth steps (S1 to S9).

Here, since the decorative printed layer 3 in the top plate 10B is transparent to the above The first layer of the panel substrate 1 is in contact with the first layer of the black decorative printing layer 3B formed of black ink and the second layer of the white decorative printing layer 3W formed by the white ink contacting the second layer of the planarizing resin layer 4 With the structure, when the transparent electrode layer 6 having the wiring layer 6A formed on the back surface of the flattening resin layer 4 is subjected to laser processing, the infrared ray irradiated with the infrared ray is absorbed in the white decorative printed layer 3W. The amount of infrared rays reaching the black decorative printed layer 3B is reduced, whereby the damage of the black decorative printed layer 3B of the above-described decorative printing can be reduced.

Here, for the top plate 10B of such a configuration, a sample in which the thickness of the black decorative printed layer 3B and the white decorative printed layer 3W and the thickness of the flattened resin layer 4 are changed is evaluated, and the identification of the decorative printed layer 3 is evaluated. After the sex, the result as shown in Fig. 6 was obtained.

The ultraviolet curable resin which forms the flattening resin layer 4 is a RL-9262 resin manufactured by Sanyu-Rec Resin Co., Ltd., and a fiber laser (1060±10 nm) manufactured by Kataoka Seisakusho Co., Ltd. as a laser processing machine. The transparent electrode layer 6 having the wiring layer 6A is patterned, and the visibility of the decorative printed layer 3 is evaluated. The black decorative printed layer 3B was made of Seikodvance Co., Ltd. HAC concentrated 710 black, and the white decorative printed layer 3W was made of Seiko Ink Co., Ltd. HAC concentrated 120 white.

The identification of the identification is performed by using the transmission and the epitaxy of the optical microscope, and the surface and the back surface of the laminated body are respectively observed and the defects are detected in the decorative printed layer 3.

A sample having a thickness of the black decorative printed layer 3B of 6 μm, a white decorative printed layer 3W, and a flattening resin layer 4 having a thickness of 10 μm was designated as Comparative Example 1.

A sample having a thickness of the black decorative printed layer 3B of 6 μm, a white decorative printed layer 3W, and a thickness of the planarized resin layer 4 of 30 μm was designated as Comparative Example 2.

The black decorative printed layer 3B has a thickness of 12 μm and no white decorative printed layer A sample having a thickness of 10 μm of the planarized resin layer 4 of 3 W was used as Comparative Example 3.

A sample in which the thickness of the black decorative printed layer 3B was 6 μm, the thickness of the white decorative printed layer 3W was 6 μm, and the thickness of the planarized resin layer 4 was 10 μm was used as Example 1.

A sample in which the thickness of the black decorative printed layer 3B was 6 μm, the thickness of the white decorative printed layer 3W was 12 μm, and the thickness of the planarized resin layer 4 was 10 μm was designated as Example 2.

In any of Comparative Examples 1 to 3, defects were generated in the black decorative printed layer 3B due to laser processing, and there was a problem of visibility.

On the other hand, in the first and second embodiments, 3.7 to 3.8% of the infrared rays irradiated during the laser processing were reflected by the white decorative printed layer 3W formed on the back surface of the black decorative printed layer 3B, and 96.1% was absorbed. After being weakened to 0.1 to 0.2%, the black decorative printed layer 3B is reached, and none of them is defective in the decorative printed layer 3 due to laser processing, and good visibility can be obtained.

Next, in the next 10th step S10, as shown in FIG. 7A, the back surface of the top plate 11 is faced with the front surface of the bottom plate 12, and as shown in FIG. 7B, by bonding the top plate 11 to the bottom plate 12, The electrostatic capacitance type touch panel 100 having the transparent electrode layer 6 having the wiring layer 6A formed on the top plate 11 and the transparent electrode layer 8 having the wiring layer 8A formed on the bottom plate 12 functions as a sensor portion.

Further, the transparent electrode layer 8 having the wiring layer 8A formed on the bottom plate 12 is provided with wiring by laser processing using infrared laser light similarly to the transparent electrode layer 6 having the wiring layer 6A formed on the top plate 11. The transparent electrode layer 8 of the layer 8A is patterned to form a fine wiring pattern.

Here, the transparent electrode layers 6, 8 can very suitably use materials such as Ag or Cu nanowires, ITO or ZnO. The transparent electrode layers 6, 8 are composed of a plurality of wires and are sandwiched The insulator is formed to intersect, and the static capacitance is formed in equal amounts.

Moreover, as a material which is formed so as to cover the entire flattened resin layer 4 over the back surface of the transparent panel substrate 1 and the back surface of the decorative printed layer 3, a transparent acrylic resin coating or an amine ester system used for the ultraviolet curable ink can be used. Resin coatings, etc. More specifically, amine ester (meth) acrylate, epoxy (meth) acrylate, polyester (meth) acrylate, polyester urethane (meth) acrylate, polyether (methyl) can be used. A coating material such as acrylate, polycarbonate (meth) acrylate or polycarbonate amide (meth) acrylate. The material for planarizing the resin layer 4 preferably has a ratio of diffused transmitted light to total light transmitted light, that is, haze of not more than 1%, without affecting the optical characteristics of the touch panel. As described above, when the decorative printing is performed with a pale ink, the decorative printed layer 3 has a thickness of about 32 μm, so that it can have a thickness of, for example, about 35 μm, over the back surface of the transparent panel substrate 1 and the decorative printed layer. 3 The acrylic coating is applied on the back side to form the planarizing resin layer 4. When the acrylic coating material for forming the planarizing resin layer 4 is applied, in addition to screen printing, it can be directly coated using a die coater. As described above, since the known coating technique can be used to form the planarizing resin layer 4, it is not necessary to introduce a special device, and the same equipment as that used for the printing step of the decorative printed layer 3 can be used, and the manufacturing cost can be reduced. When the transparent electrode layer 6 is formed on the back surface of the planarizing resin layer 4, it is possible to prevent the wiring from being broken due to the step.

The flattening resin layer 4 of the top plate 11 in the static capacitance type touch panel 100 is a resin layer having an infrared absorbing function after curing the ultraviolet curable resin, and the glass layer is cured before the resin layer is cured in the process. A flat substrate having a flat surface such as a plate is subjected to a compression treatment while covering the back surface of the planarizing resin layer 4, and the back surface of the flattening resin layer 4 is a flat surface on which the flat surface of the flat substrate is transferred. Thereby, in the above-mentioned decorative printed layer 3 In the image display region, the surface roughness of the back surface of the flattening resin layer 4 is unrecognizable, and the surface roughness of the back surface of the flattening resin layer 4 does not deteriorate the quality of the electrostatic capacitance type touch panel 100. The static capacitance type touch panel 100 is a high-quality electrostatic capacitance type touch panel for eliminating a flat resin layer formed by the decorative printed layer 3 formed on the outer edge of the back surface of the transparent panel substrate 11. 4 The surface roughness of the back side will not be recognized.

In the top plate 11 of the static capacitance type touch panel 100, since the white decorative printed layer 3W is formed on the back surface of the black decorative printed layer 3B, even by using an infrared laser from the back side of the decorative printed layer 3 The laser processing of the laser source patterns the wiring layer 6A and the transparent electrode layer 6, and the infrared rays irradiated during the laser processing are also weakened to 0.1 to 0.2% and then reach the black decorative printing layer 3B without laser processing. However, defects are generated in the decorative printed layer 3, and good visibility can be obtained.

For example, as shown in FIG. 8, the capacitive touch panel 100 is configured to be mounted on a front surface of a video display unit 200 such as a liquid crystal panel to form a video display device 300 having a touch panel.

1, 7‧‧‧ transparent panel substrate

2‧‧‧ anchor layer

3‧‧‧Plus printing layer

3B‧‧‧Black decorative printing layer

3W‧‧‧White decorative printing layer

4‧‧‧Flating resin layer

5‧‧‧Protective layer

6, 8‧‧‧ transparent electrode layer

6A, 8A‧‧‧ wiring layer

9‧‧‧Flexible printed circuit board

11‧‧‧ top board

12‧‧‧floor

100‧‧‧Static Capacitive Touch Panel

Claims (16)

A laminated body comprising: a transparent panel substrate; a decorative printed layer having a two-layer structure formed on an outer edge portion of the back surface of the transparent panel substrate, laminated in parallel with the transparent panel substrate; and a planarized resin layer on the transparent panel a surface of the substrate on which the decorative printed layer is formed to cover a region extending over the decorative printed layer and the transparent panel substrate, and a transparent electrode layer formed on a back surface of the planarizing resin layer and having a wiring layer; In the decorative printed layer of the two-layer structure, the second layer contacting the flattened resin layer is white. The laminate according to claim 1, wherein the decorative printed layer is directly laminated on the back surface of the transparent panel substrate. The laminate according to claim 1, wherein the decorative printed layer is provided with an anchor layer covering the back surface of the transparent panel substrate. The laminate according to the second or third aspect of the invention, wherein the infrared ray absorption amount of the second layer in the decorative printed layer is 92% or more and 95% or less at a wavelength of 1060 nm. The laminate of claim 4, wherein the transparent conductive layer is made of a material comprising a silver nanowire or a Cu nanowire. A method of manufacturing a laminated body comprising: a transparent panel substrate; a decorative printed layer having a two-layer structure formed on an outer edge portion of a back surface of the transparent panel substrate, laminated in parallel with the transparent panel substrate; and a planarized resin layer And forming a surface of the transparent panel substrate on which the decorative printed layer is formed, and covering the surface of the decorative printed layer and the transparent panel substrate And a transparent electrode layer formed on the back surface of the planarizing resin layer and having a wiring layer; and in the decorative printed layer having the two-layer structure, the second layer contacting the planarizing resin layer is white; The infrared laser is laser-processed as a laser light source to pattern the wiring layer and the transparent electrode layer on the back surface of the decorative printed layer of the laminate. A capacitive sensor type touch panel comprising: a transparent panel substrate; and a decorative printed layer having a two-layer structure; the outer edge portion of the back surface of the transparent panel substrate is formed in parallel with the transparent panel substrate; and the flat resin layer is a surface of the transparent panel substrate on which the decorative printed layer is formed to cover a region extending over the decorative printed layer and the transparent panel substrate, and a transparent electrode layer formed on a back surface of the planarizing resin layer and having wiring In the decorative printed layer of the two-layer structure, the second layer contacting the flattening resin layer is white; and the wiring layer and the transparent electrode layer on the back surface of the decorative printed layer are used by using infrared rays. The laser is laser processed and patterned. The capacitive touch panel of claim 7, wherein the decorative printed layer is directly laminated on the back surface of the transparent panel substrate. The capacitive touch panel of claim 7, wherein the decorative printed layer is provided with an anchor layer covering the back surface of the transparent panel substrate. The electrostatic capacitance type touch panel according to claim 8 or 9, wherein in the decorative printed layer, the infrared absorption amount of the second layer is 92% or more and 95% or less at a wavelength of 1060 nm. The capacitive touch panel of claim 10, wherein the transparent conductive layer is made of a material including a silver nanowire or a Cu nanowire. An image display device comprising a capacitive touch panel integrated on a display screen, wherein the capacitive touch panel comprises: a transparent panel substrate; and a two-layer structured decorative printed layer on the transparent panel substrate The outer edge portion of the back surface is formed in parallel with the transparent panel substrate; and a flattening resin layer is formed on the surface of the transparent panel substrate on which the decorative printed layer is formed to cover the decorative printed layer and the transparent panel a region of the substrate; and a transparent electrode layer formed on the back surface of the planarizing resin layer and having a wiring layer; and in the decorative printed layer having the two-layer structure, the second layer contacting the planarizing resin layer is white; The wiring layer and the transparent electrode layer on the back surface of the decorative printed layer are patterned by laser processing using infrared laser. The image display device of claim 12, wherein the decorative printed layer is directly laminated on a back surface of the transparent panel substrate. The image display device of claim 12, wherein the decorative printed layer is provided with an anchor layer covering the back surface of the transparent panel substrate. The image display device according to claim 13 or 14, wherein in the decorative printed layer, the infrared absorption amount of the second layer is 92% or more and 95% or less at a wavelength of 1060 nm. The image display device of claim 15, wherein the transparent conductive layer is made of a material including a silver nanowire or a Cu nanowire.