TW201536541A - Cover glass, display device having cover glass, and method for producing cover glass - Google Patents

Abstract

Provided is a cover glass that includes a reinforcing part having an appropriate degree of strength and ductility. The cover glass is provided with a unit substrate comprising glass and a reinforcing part which is provided on a side surface of the unit substrate and contains a resin material. The resin material that constitutes the reinforcing part has a polyene-polythiol-based resin that contains an ene compound and a thiol compound.

Description

Cover glass, display device with cover glass, and manufacturing method of cover glass

The present invention relates to a cover glass that is disposed on a display device. Further, the present invention relates to a display device provided with a cover glass. Moreover, the present invention relates to a method of producing a cover glass.

From the prior art, it is known to provide a cover glass for protecting the display surface of the display device at the observer side of a display device such as a liquid crystal display or an organic EL display. When the function of the touch panel is provided at the display device, the cover glass also functions to protect the display device and the touch panel sensor disposed at the observer side of the display device. In addition, it is also known that the cover glass and the touch panel sensor are integrally formed.

In recent years, the popularity of portable terminals with display devices such as smart phones or tablet PCs has been remarkable. In the portable terminal, there is a requirement for the durability against the drop impact generated in the use environment. Therefore, for the cover glass for protecting the display device, it is required to have high strength capable of withstanding the frequently generated impact. In this context, for example in Patent Document 1 proposes to use a tempered glass on which a compressive stress layer having a compressive stress is formed on a surface thereof to constitute a cover glass.

In Patent Document 1, a large tempered glass is used. The film is divided and sliced to produce a cover glass having a size corresponding to the size of various display devices. Further, the compressive stress layer of the tempered glass is formed on the surface of the glass by chemical treatment or heat treatment. Therefore, when the large tempered glass is divided as in the case of Patent Document 1, the tensile stress layer on which the tensile stress is generated is exposed on the side surface of the obtained cover glass. Therefore, it is estimated that the cover glass having sufficient strength at the side surface cannot be manufactured by the method described in Patent Document 1.

On the other hand, the proposal is made on the side of the cover glass. The method of setting the resin to improve the strength of the side covering the glass. For example, in Patent Document 2, a method of edge-treating a peripheral surface of a cover glass including a side surface of a cover glass by a plastic film is proposed. As the edge treatment method, an injection molding method, a dispensing method, a spray coating method, a roll coating method, and the like are proposed. Examples of the material of the plastic film include an epoxy resin or an acrylic resin.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2012-88946

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2012-111688

When the edge treatment of the outer peripheral surface of the cover glass is performed by a plastic film as described in Patent Document 2, the resin material constituting the plastic film is exposed to the external environment such as the atmosphere. On the other hand, when the resin material is placed at a specific place, generally, a resin material adjusted in such a manner as to have a specific fluidity is applied to the object, and then, by using a resin material. The polymerization reaction produces a process for hardening or solidifying the resin material. Therefore, the plastic film provided on the outer peripheral surface of the cover glass is formed by a polymerization reaction performed in an environment exposed to the external environment such as the atmosphere. On the other hand, an acrylic resin generally has high reactivity. Therefore, when a plastic film is formed using an acrylic resin, the polymerization reaction is inhibited by oxygen, and as a result, it is estimated that the polymerization reaction cannot be sufficiently performed, and sufficient hardness of the plastic film cannot be obtained.

Further, the plastic film provided on the outer peripheral surface of the cover glass is required to have a relatively high hardness in order to protect the cover glass from impact damage. On the other hand, if the hardness of the plastic film is too high, the plastic film becomes brittle, and as a result, the toughness of the plastic film is lowered. On the other hand, the epoxy resin generally has a high hardness and, for example, has a hardness of about D90. Therefore, it is possible to apply shock frequently In the use of the cover glass, it is presumed that it is not appropriate to use an epoxy resin. In addition, the term "D90" means that the value of the hardness obtained by the measurement of the hardness meter of the type D is "90".

The first invention of this invention is for consideration of such a state of affairs. The present inventors aim to provide a cover glass having a reinforcing portion made of a suitable resin material and a display device with a cover glass.

Also, a portable terminal such as a smart phone or a tablet PC In general, a speaker for a call or an inner camera for photographing a user is provided on the front side of the portable terminal. In this case, in order to improve the sound quality or the image quality, a through hole may be formed in a portion of the cover glass that overlaps the speaker or the inside camera. On the other hand, the formation of the through-holes means that the impact resistance of the cover glass around the through-holes is lowered. When the impact resistance is lowered, the tensile stress layer of the tempered glass is exposed on the wall surface of the through hole, and the system becomes more conspicuous. However, in the range known to the inventors of the present invention, in the prior art, although many proposals have been made for the reinforcing method for covering the side surface of the glass, the reinforcing method for the wall surface of the through hole has not been made too much. Review.

The second invention is for consideration of such a state of affairs. The present inventors have made it possible to provide a cover glass which is reinforced with respect to the wall surface of the through-hole of the unit substrate and a display device with a cover glass.

According to a first aspect of the invention, there is provided a cover glass which is a cover glass provided in a display device, characterized in that the unit substrate includes a first surface and a first surface The second surface on the opposite side and the side surface existing between the first surface and the second surface include glass; and the reinforcing portion is provided on the side surface of the unit substrate and contains a resin material The resin material of the reinforcing portion has a polyene-polythiol resin containing an olefin compound and a thiol compound.

In the cover glass according to the first aspect of the invention, the reinforcing portion may be provided on a side surface of the outer surface of the unit substrate, and may be provided with a side surface containing the resin material. unit.

In the cover glass according to the first aspect of the invention, the unit base material may be formed with a through hole penetrating the first surface and the second surface, and the reinforcing portion may be It is provided in the through hole of the unit substrate, and is provided with a hole reinforcing portion including the resin material.

In the cover glass according to the first aspect of the invention, the surface of the reinforcing portion may be at least partially provided with a decorative portion that exhibits a specific color.

In the cover glass according to the first aspect of the invention, the polyene-polythiol resin of the resin material in the reinforcing portion may include 20 to 80% by weight of an olefin compound, and 20~80 weight Amount of thiol compound.

The second invention is a cover glass, which is The cover glass provided in the display device is characterized in that the unit substrate includes a first surface and a second surface opposite to the first surface, and is formed to penetrate the first surface The surface and the through hole of the second surface include glass; and the reinforcing portion for the hole is provided on the wall surface of the through hole of the unit substrate, and includes a resin material.

In the cover glass caused by the second invention, The hole reinforcing portion may include a first surface extending in a side direction from an end portion of the first surface of the unit substrate, and a second surface end from the unit substrate a second surface extending toward the side direction and a side surface extending between the first surface and the second surface of the hole reinforcing portion, wherein the first surface of the unit substrate and the hole are reinforced The step between the first faces of the portion is 10 μm or less, and the step between the second surface of the unit substrate and the second surface of the hole reinforcing portion is 10 μm or less.

In the cover glass caused by the second invention, The unit substrate may include a compressive stress layer formed on at least the first surface and the second surface, and the compressive stress layer and the second surface side positioned on the first surface side. The tensile stress layer between the aforementioned compressive stress layers.

In the cover glass caused by the second invention, The tensile stress layer may be exposed on the wall surface of the through hole of the unit substrate. In this case, it is preferable that the aforementioned hole is filled The strong portion is formed such that the tensile stress layer exposed at the wall surface of the through hole of the unit substrate is covered by the hole reinforcing portion.

In the cover glass caused by the second invention, The minimum value of the coating size of the hole reinforcing portion provided on the wall surface of the through hole of the unit substrate may be 20 μm or more.

In the cover glass caused by the second invention, The wall surface of the through-hole of the unit substrate may include a first wall surface that intersects the first surface of the unit substrate and that is adjacent to the second surface of the unit substrate a side extending toward the center side of the through hole; and a second wall surface intersecting the second surface of the unit substrate, and facing the first surface side of the unit substrate toward the center of the through hole The side is stretched and then merged with the first wall surface.

In the cover glass caused by the second invention, The wall surface of the through-hole of the unit substrate may be extended toward the center side of the through-hole from the second surface side of the unit substrate toward the first surface side.

In the cover glass caused by the second invention, The decorative portion that exhibits a specific color may be provided on the first surface side of the unit substrate, and the hole reinforcing portion may be configured to have the same color as the decorative portion. Moreover, the decorative portion may be configured to follow the normal direction of the cover glass. In the case of observation, the hole reinforcing portions are overlapped with each other.

In the cover glass caused by the second invention, The hole reinforcing portion may be configured to present a specific color.

In the cover glass caused by the second invention, At least a part of the touch panel sensing unit may be provided on the first surface side of the unit substrate.

In the cover glass caused by the second invention, The resin material of the hole reinforcing portion may be a polyene-polythiol resin.

In the cover glass caused by the second invention, At least one of a portion of the side surface of the hole reinforcing portion that intersects the first surface of the hole reinforcing portion or a portion that intersects the second surface may be formed into a circle. An angled surface or a chamfered surface.

The invention is a display device with a cover glass, It is characterized in that it is provided with a display device and a cover glass disposed at the display device, and the cover glass is made of the cover glass described above.

The invention is a method for manufacturing a cover glass, A cover glass is provided in a display device and is formed with a through hole. The method for producing a cover glass is characterized in that: a preparation process is provided to prepare a unit substrate, and the unit substrate includes The first surface and the second surface opposite to the first surface are formed to penetrate the first surface a through hole having a surface on the first surface and the second surface, and a coating process, wherein a coating liquid containing a resin material is applied to a wall surface of the through hole of the unit substrate; and a curing process is performed on the unit The coating liquid on the wall surface of the through hole of the substrate is cured, and a hole reinforcing portion is formed on the wall surface of the through hole of the unit substrate.

In the method of manufacturing the cover glass caused by the present invention, The unit substrate may include a compressive stress layer formed on at least the first surface and the second surface, and the compressive stress layer on the first surface side and the second surface. A tensile stress layer between the aforementioned compressive stress layers on the face side.

In the method of manufacturing the cover glass caused by the present invention, The tensile stress layer may be exposed on the wall surface of the through hole of the unit substrate. In this case, it is preferable that the hole reinforcing portion is such that the tensile stress layer exposed at the wall surface of the through hole of the unit substrate is covered by the hole reinforcing portion. form.

Before the manufacturing method of the cover glass caused by the present invention In the coating process, the through-holes of the unit substrate may be sealed on the second surface side of the unit substrate. In this case, the coating liquid is applied from the first surface side of the unit substrate in a sealed space. Further, in the above-described hardening process, the hole reinforcing portion is formed to block the through hole of the unit base material. Further, in the method for producing a cover glass, after the hardening process, a through hole is formed in the hole reinforcing portion. Resin material processing engineering.

In the method of manufacturing the cover glass caused by the present invention, The first protective film may be formed on the first surface of the unit substrate, wherein the first protective film is formed with a hole that is continuous with the through hole of the unit substrate. The wall surface of the hole of the first protective film is located closer to the center side of the through hole of the unit substrate than the wall surface of the through hole of the unit substrate.

The foregoing method for manufacturing a cover glass by the present invention The preparation process may include: a protective film forming process in which the first protective film on which the hole is formed is provided on the first surface of the unit substrate; and an etching process is performed by the The protective film is wet-etched on the unit substrate as a resist layer to form the through hole.

In this case, in the protective film forming process, the second surface of the unit substrate may be further provided at a position corresponding to the hole of the first protective film. In the etching process, the unit substrate is formed of the first protective film and the second protective film as a resist layer from the first surface side and the second surface. The wet etching is performed on the surface side, and in the coating process, the through-holes of the unit substrate are sealed by a sealing member disposed on the second protective film.

Alternatively, in the preparation process, the second surface of the unit substrate may be provided with a second protective film or a seal for sealing the through hole of the unit substrate. In the above etching process, the unit substrate is made of the first protective film. The etched layer is wet etched from the first surface side.

The method for manufacturing the cover glass caused by the present invention is also Further, the element portion forming process may be performed to form at least a part of the element portion including at least one of the decorative portion or the touch panel sensing portion on the first surface side of the unit substrate.

In the method of manufacturing the cover glass caused by the present invention, Alternatively, the element portion forming process may be performed before the protective film forming process.

According to the present invention, it is possible to provide a cover glass having a reinforcing portion having appropriate hardness and toughness.

10‧‧‧ Display device with cover glass

15‧‧‧ display device

20‧‧‧ Covering glass

22‧‧‧unit substrate

23‧‧‧through glass through hole

23c‧‧‧ wall

24a‧‧‧Compressive stress layer

24b‧‧‧ tensile stress layer

25‧‧‧through hole for unit substrate

25c‧‧‧ wall

26‧‧‧Reinforcement Department (side reinforcement)

27‧‧‧ Coating solution

28‧‧‧Reinforcement Department

30‧‧‧Substrate

40‧‧‧Touch Panel Sensing Department

60‧‧‧1st decoration department

62‧‧‧2nd Decoration Department

81‧‧‧1st protective film

82‧‧‧2nd protective film

Fig. 1 is a development view showing a cover glass display device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a touch panel sensing portion provided at the cover glass of FIG. 1. FIG.

Fig. 3 is a cross-sectional view taken along line III of the cover glass of Fig. 2.

Fig. 4 is a cross-sectional view taken along line IV of the cover glass of Fig. 2.

[Fig. 5] Fig. 5 is an enlarged view of the side of the cover glass of Fig. 3. Show the profile.

6A] Fig. 6A is a view showing a part of a process for forming a unit laminate having a unit substrate and a protective film using a substrate made of a large tempered glass.

[Fig. 6B] Fig. 6B (a) and (b) show a part of a project for forming a unit laminate having a unit substrate and a protective film using a substrate made of a large tempered glass. Figure.

6C] FIG. 6C is a view showing a part of a process for forming a unit laminate having a unit substrate and a protective film using a substrate made of a large tempered glass.

[Fig. 6D] Fig. 6D(a) and (b) are diagrams showing a part of a project for forming a unit laminate having a unit substrate and a protective film using a substrate made of a large tempered glass. .

[Fig. 6E] Fig. 6E (a) and (b) are diagrams showing a part of a project for forming a unit laminate having a unit substrate and a protective film using a substrate made of a large tempered glass. .

[Fig. 7A] Fig. 7A is a view showing a part of a work for obtaining a cover glass which is reinforced with a side surface by providing a resin on a side surface of a unit substrate of a unit laminate.

[Fig. 7B] Fig. 7B is a view showing a part of an engineering for obtaining a cover glass which is reinforced by a side surface by providing a resin on a side surface of a unit substrate of a unit laminate.

[ Fig. 7C] Fig. 7C is a view showing a reinforced surface for the purpose of providing a resin on the side surface of a unit substrate of a unit laminate. Part of the project to cover the glass is shown in the map.

[Fig. 7D] Fig. 7D is a view showing a part of an engineering for obtaining a cover glass which is reinforced with a side surface by providing a resin on a side surface of a unit substrate of a unit laminate.

Fig. 8 is a cross-sectional view showing a cover glass in a first modification of the first embodiment.

Fig. 9 is a cross-sectional view showing a cover glass in a second modification of the first embodiment.

Fig. 10 is a cross-sectional view showing a cover glass in a third modification of the first embodiment.

Fig. 11 is a cross-sectional view showing a cover glass in a fourth modification of the first embodiment.

Fig. 12 is a cross-sectional view showing a cover glass in a fifth modification of the first embodiment.

Fig. 13 is a cross-sectional view showing a cover glass in a sixth modification of the first embodiment.

Fig. 14 is a view showing an example in which a reinforcing portion is formed on a wall surface of a through hole formed in a unit base material.

Fig. 15 is a view showing the construction of the reinforcing portion 26 on the wall surface a of the through hole shown in Fig. 14.

Fig. 16 is a plan view showing a cover glass according to a second embodiment.

Fig. 17 is a cross-sectional view taken along line XVII of the cover glass of Fig. 16.

Fig. 18 is a cross-sectional view showing the through hole of the cover glass of Fig. 17 in an enlarged manner.

19A] Fig. 19A is a view showing a part of a process for forming a unit laminate having a unit substrate and a protective film using a substrate made of a large tempered glass.

19B] FIG. 19B is a view showing a part of a process for forming a unit laminate having a unit substrate and a protective film using a substrate made of a large tempered glass.

19C] FIGS. 19C(a) and (b) are diagrams showing a part of a process for forming a unit laminate having a unit substrate and a protective film using a substrate made of a large tempered glass. .

[Fig. 19D] Fig. 19D (a), (b), and (c) are a part of a process for forming a unit laminate having a unit substrate and a protective film using a substrate made of a large tempered glass. A picture of the show.

[Fig. 20A] Fig. 20A is a view showing a part of a process for reinforcing a through hole covering a glass.

[Fig. 20B] Fig. 20B is a view showing a part of an engineering for reinforcing a through hole of a cover glass.

20C] Fig. 20C is a view showing a part of an engineering for reinforcing a through hole of a cover glass.

[Fig. 20D] Fig. 20D is a view showing a part of an engineering for reinforcing a through hole of a cover glass.

[ Fig. 21A] Fig. 21A is a cross-sectional view showing a first protective film in a first modification of the second embodiment.

[Fig. 21B] Fig. 21B shows a unit laminate obtained by etching a substrate with a second protective film as a resist layer in the first modification of the second embodiment. Sectional view.

[Fig. 22A] Fig. 22A is a diagram showing an engineering display of applying a coating liquid in a space surrounded by a through hole of a second protective film and a unit substrate in a first modification of the second embodiment. .

[Fig. 22B] Fig. 22B is a view showing an engineering construction in which a through hole is formed in a hole reinforcing portion in the first modification of the second embodiment.

[ Fig. 22C] Fig. 22C is a cross-sectional view showing the cover glass in the first modification of the second embodiment.

[ Fig. 23A] Fig. 23A is a cross-sectional view showing a unit substrate in a second modification of the second embodiment.

[ Fig. 23B] Fig. 23B is a cross-sectional view showing a unit laminate in a second modification of the second embodiment.

[Fig. 24A] Fig. 24A is a diagram showing an engineering display of applying a coating liquid in a space surrounded by a through hole of a second protective film and a unit substrate in a second modification of the second embodiment. .

Fig. 24B is a cross-sectional view showing the cover glass in the second modification of the second embodiment.

[ Fig. 25A] Fig. 25A is a cross-sectional view showing a unit laminate in a third modification of the second embodiment.

[Fig. 25B] Fig. 25B is a view showing an engineering display of applying a coating liquid in a space surrounded by a through hole of a second protective film and a unit substrate in a third modification of the second embodiment. .

[ Fig. 25C] Fig. 25C is a cross-sectional view showing the cover glass in the third modification of the second embodiment.

Fig. 26 is a cross-sectional view showing a cover glass in a fourth modification of the second embodiment.

Fig. 27 is a cross-sectional view showing a cover glass in a fifth modification of the second embodiment.

[ Fig. 28] Fig. 28 is a cross-sectional view showing an example of a cover glass in a sixth modification of the second embodiment.

[ Fig. 29] Fig. 29 is a cross-sectional view showing another example of the cover glass in the sixth modification of the second embodiment.

[Fig. 30] Fig. 30 is a view showing an example of a coating liquid applied to a wall surface of a through hole covering a glass in a seventh modification of the second embodiment.

[Fig. 31] Fig. 31 is a view showing another example of the coating liquid applied to the wall surface of the through hole covering the glass in the seventh modification of the second embodiment.

FIG. 32 is a plan view showing an example of a cover glass provided with a touch panel sensing unit in an eighth modification of the second embodiment.

Fig. 33 is a cross-sectional view taken along line XXXIII of the cover glass of Fig. 32.

Fig. 34 is a cross-sectional view taken along line XXXIV of the cover glass of Fig. 32.

35 is a modification of the eighth embodiment of the second embodiment. Another cross-sectional view of the cover glass provided with the touch panel sensing portion is shown.

36(a) to 36(d) are diagrams showing a method of evaluating the printing suitability of a resin in Example 2.

Fig. 37 is a view showing a method for evaluating the impact resistance of a resin in Example 3.

First embodiment

Hereinafter, a first embodiment of the present invention will be described with reference to Figs. 1 to 7D. In addition, in the drawings attached to the present specification, for the sake of convenience and ease of understanding in the drawings, the scales of the drawings and the objects, and the ratio of the dimensions of the vertical and horizontal dimensions are appropriately changed and exaggerated.

(with display device covering the glass)

First, referring to Fig. 1, a description will be given of a display device 10 with a cover glass. As shown in Fig. 1, generally, a display device 10 with a cover glass is constructed by combining a display device 15 and a cover glass 20. The display device 15 shown is a flat panel display. The display device 15 includes a display panel 16 having a display surface 16a and a display control unit (not shown) connected to the display panel 16. The display panel 16 includes an active area A1 capable of displaying an image, and is disposed on the outer side of the active area A1 in such a manner as to surround the active area A1. Inactive area (also known as frame area) A2. The display control unit processes the information related to the image to be displayed, and drives the display panel 16 based on the image information. The display panel 16 displays a specific image on the display surface 16a based on the control signal of the display control unit. In other words, the display device 15 serves as an output device for outputting information such as characters or figures as images.

As shown in Figure 1, the cover glass 20 is generally displayed. The display side of the device 15 is disposed on the display surface 16a of the display panel 16. The cover glass 20 is attached to the display surface 16a of the display device 15 via, for example, an adhesive layer (not shown). In Fig. 1, the surface (first surface) of the cover glass 20 on the display device side is denoted by the component symbol 20a, and the surface of the viewer side (the second surface) is denoted by the component symbol 20b.

In addition, in the present embodiment, the cover glass 20, the structure In addition to the function of protecting the display device 15, the function of the touch panel is also provided. Specifically, the first surface 20a on the display device 15 side of the cover glass 20 is provided with a touch panel sensing portion 40, and the touch panel sensing portion 40 includes a function for detecting an external conductor. Sensing electrodes that are close to or in contact. Further, at the inactive area Aa2 of the first surface 20a of the cover glass 20, a first decorative portion 60 for providing a desired color is further provided.

(touch panel sensor)

Next, referring to FIG. 2, for the first set on the cover glass 20 The touch panel sensing unit 40 at the surface 20a will be described. Fig. 2 is a plan view showing a case where the cover glass 20 is observed from the side of the first surface 20a. In addition, in FIG. 2, for convenience of description, the 1st decorative part 60 is abbreviate|omitted.

As shown in FIG. 2, the first side of the cover glass 20 is generally covered. 20a corresponds to the active area A1 and the inactive area A2 of the display panel 16, and is divided into an active area Aa1 corresponding to the area where the touch position can be detected, and an inactive area positioned around the active area Aa1. Aa2. Further, the touch panel sensing unit 40 is provided with a plurality of sensing electrodes 41 and 42 disposed at the active area Aa1, and is connected to the corresponding sensing electrodes 41 and 42 and disposed in the overlay. The plurality of lead wires 43 at the inactive area Aa2 of the glass 20 and the plurality of terminal portions 44 connected to the corresponding lead wires 43 are provided.

The sensing electrodes 41, 42 are generally as shown in FIG. A plurality of first sensing electrodes 41 extending along the first direction D1 and a plurality of second sensing electrodes 42 extending along the second direction D2 orthogonal to the first direction D1 are provided. Each of the sensing electrodes 41 and 42 may be provided with linear portions 41a and 42a extending in a straight line, and bulging portions 41b and 42b bulging from the line portions 41a and 42a, respectively.

Exporting the wiring 43 in order to be sensed by the corresponding The signals detected by the electrodes 41, 42 are always conducted to the terminal portion 44 and are disposed at the inactive area Aa2. The signal that is always transmitted to the terminal portion 44 by the lead wire 43 is transmitted to the detection control portion via a flexible substrate (not shown) or the like attached to the terminal portion 44.

(covering glass, touch panel sensor, and decorative layer)

Next, a layer configuration of the cover glass 20 and the touch panel sensing unit 40 and the first decorative portion 60 provided on the first surface 20a of the cover glass 20 will be described with reference to FIGS. 3 and 4 . 3 and 4 are cross-sectional views along line III and line IV of the cover glass 20 shown in Fig. 2, respectively.

First, for the active area that is disposed in the cover glass 20 The layer constitution of the constituent elements at Aa1 will be described. As shown in FIG. 3 and FIG. 4, the first line portion 41a, the first bulging portion 41b, and the second bulging portion 42b of the touch panel sensing unit 40 may be formed on the same plane. . In this case, by patterning the transparent conductive layer 51 made of a transparent conductive material such as indium tin oxide (ITO), the first line portion 41a, the first bulging portion 41b, and the first portion can be simultaneously formed. 2 bulging portion 42b. The first line portion 41a and the second line portion 42a are formed so as to partially overlap each other when viewed from the normal direction of the cover glass 20, and are formed in the first line portion 41a and the second line portion. Between 42a, there is an insulating layer 47 interposed.

Next, for the inactive area that is disposed in the cover glass 20 The layer configuration of the constituent elements at the domain Aa2 will be described. As shown in FIG. 3 and FIG. 4, in the inactive area Aa2, the first decorative portion 60 is disposed such that the position is closer to the observer than the above-described lead-out wiring 43. In this case, the first decorative portion 60 is visually recognized from the observer side via the cover glass 20. That is, in the attached In the display device 10 for covering glass, the appearance of the inactive area Aa2 is determined by the constituent elements of the first decorative portion 60 and its surroundings.

The color of the first decorative part 60 is corresponding to the cover glass The design sense required for the glass display device 10 is selected. For example, examples of the color of the first decorative portion 60 include black, white, aqua blue, pink, green, and the like. The material constituting the first decorative portion 60 is determined according to the selected color. However, for example, when it is required to be white, the first decorative portion 60 includes a bonding material made of a resin material. And a coloring pigment such as titanium oxide dispersed in the bonding material. As the bonding material, for example, a resin such as an acrylic resin, an epoxy resin, a polyurethane resin, a polyamide resin, or the like, or a mixture of such resins can be suitably used.

In addition, in the manufacturing process of the cover glass 20, When the first decorative portion 60 is provided on the unit base material 22 or the base material 30 to be described later, and then the reinforcing portion 26 is provided on the side surface 22c of the unit base material 22, as shown in FIG. 3 and FIG. The decorative portion 60 may not be able to extend all the way to the side surface 20c of the cover glass 20, that is, it may not extend to the side surface 26c of the reinforcing portion 26. Therefore, the design effect obtained by the first decorative portion 60 is not covered by the side surface 20c of the cover glass 20, and is, for example, a portion that cannot be covered by the reinforcing portion 26. In consideration of this point, as shown in FIG. 3 and FIG. 4, the first decorative portion 60 on the side of the first surface 22a of the unit base member 22 or the first surface 26a of the reinforcing portion 26 may be used. At the position, the second decorative portion 62 is provided. The second decorative portion 62 is intended to present a specific The way the color is formed. By further providing such a second decorative portion 62, the range of the inactive area Aa2 capable of exhibiting a desired color can be further expanded outward, and the image can be prevented from leaking light from the outer peripheral portion. Design improvement. Preferably, the second decorative portion 62 is configured to overlap the reinforcing portion 26 when viewed along the normal direction of the first surface 20a of the cover glass 20. More preferably, the second decorative portion 62 is configured to reach the side surface 20c of the cover glass 20 when viewed along the normal direction of the first surface 20a of the cover glass 20.

The color of the second decorative portion 62 is not particularly limited. It is appropriate to set it according to the desired design effect. For example, the second decorative portion 62 can be configured by the same material as the first decorative portion 60 so as to exhibit the same color as the first decorative portion 60, or can be presented and the first decorative portion 60. The way different colors are formed. As a method of providing the second decorative portion 62, various known methods can be employed. For example, after the reinforcing portion 26 is formed, the coating liquid containing the material constituting the second decorative portion 62 is screen-printed. A method in which the printing method such as the method is applied to the first surface 26a of the reinforcing portion 26 or the like. In the case of using a printing method, as the solvent for constituting the coating liquid, for example, ethers, ketones, esters, alcohols, polyhydric alcohols, aromatic hydrocarbons and the like can be used. Further, the surface tension of the coating liquid is adjusted, for example, in the range of 20 to 40 mN/m.

Next, the configuration of the cover glass 20 will be described. as As shown in FIG. 3 and FIG. 4, the cover glass 20 is generally provided with a unit. The base material 22 and the reinforcing portion 26. The unit base material 22 includes a first surface 22a on the display device side, a second surface 22b on the opposite side to the first surface 22a, and a side surface 22c extending between the first surface 22a and the second surface 22b. . Further, the reinforcing portion 26 is provided on the side surface 22c of the unit base member 22.

As will be described later, the unit substrate 22 is A substrate made of a large tempered glass is divided into 30 pieces and obtained. The unit base material 22 includes a compressive stress layer 24a formed on the first surface 22a and the second surface 22b, and a compressive stress layer 24a positioned on the first surface 22a side, as shown in FIG. The tensile stress layer 24b between the compressive stress layers 24a on the second surface 22b side. The compressive stress layer 24a refers to a layer in which compressive stress is generated, and the tensile stress layer 24b is a layer in which tensile stress is generated. As a method for producing such a compressive stress layer 24a and a tensile stress layer 24b, physical strengthening (air cooling strengthening) and chemical strengthening are known. For example, in chemical strengthening, the following general chemical treatment is carried out: that is, the basic ions contained in the glass are exchanged to have a larger ionic radius at a temperature lower than the deformation point. Alkaline ions. Thereby, compressive stress can be generated in the vicinity of the surface layer where ions are exchanged. By forming the compressive stress layer 24a, even if a certain impact is applied to the first surface 22a or the second surface 22b, a flaw such as a chipping is formed on the first surface 22a or the second surface 22b. In the case of the situation, it is also possible to prevent the spread of the scar. Therefore, the first surface 22a and the second surface 22b of the unit base member 22 have high resistance to impact. As a material constituting the unit substrate 22, for example, Use aluminosilicate glass. The thickness of the compressive stress layer 24a is generally in the range of 10 to 100 μm.

On the other hand, as shown in FIG. 5, the unit substrate 22 is generally used. The tensile stress layer 24b reaches up to the side 22c of the unit substrate 22. That is, at the side surface 22c of the unit substrate 22, the tensile stress layer 24b is exposed. Therefore, the side surface 22c of the unit base material 22 is less resistant to damage such as chipping than the first surface 22a and the second surface 22b of the unit base material 22. The reinforcing portion 26 described above is provided for protecting the side surface 22c of the unit base member 22.

As a material constituting the reinforcing portion 26, for example, it is used A curable resin which is polymerized by heating or ultraviolet irradiation or the like and hardens due to this. In this case, the reinforcing portion 26 has a desired fluidity during molding before curing, and the reinforcing portion 26 has a desired hardness and strength after curing. By this, it is possible to simultaneously achieve the goals of formability, hardness, and strength.

Further, in the present embodiment, the reinforcing portion 26 is a phase It is at least partially exposed to the external environment such as the atmosphere. Therefore, the polymerization reaction at the time of curing of the reinforcing portion 26 is performed in an environment where the reinforcing portion 26 is exposed to the external environment such as the atmosphere. Therefore, when a resin material having high reactivity as in the case of an acrylic resin is used, the polymerization reaction is inhibited by oxygen, and as a result, it is presumed that the polymerization reaction cannot be sufficiently performed, and therefore, it is not possible to obtain sufficient The reinforcing portion 26 of hardness.

Also, if it is used like an epoxy resin, it has an excessively high hardness. When the resin material is used, the reinforcing portion 26 becomes brittle, and as a result, it is estimated that defects or the like frequently occur in the reinforcing portion 26. That is, it can be inferred that the toughness of the reinforcing portion 26 is lowered.

Further, as described above, when the reinforcing portion 26 is provided on the side surface 22c of the unit base member 22, and the second decorative portion 62 is formed on the reinforcing portion 26, the second decorative portion 62 is screen-printed. A printing method such as law is formed. Therefore, in order to stably hold the second decorative portion 62 on the reinforcing portion 26, the reinforcing portion 26 is required to have a specific wettability with respect to the material constituting the second decorative portion 62, that is, it is provided Printing suitability.

As a result of the investigation by the inventors of the present invention, as a result of obtaining the support from the contents of the examples described later, it was found that the resin material contained in the reinforcing portion 26 is a polyene-polythiol. The resin is preferably a resin, and more preferably a polyene-polythiol photocurable resin. In addition, the polyene-polythiol-based photocurable resin is a polyene-polythiol resin which is formed by a polymerization reaction which is caused by light irradiation. Hereinafter, the characteristics of the polyolefin-polythiol-based photocurable resin will be described. The polyene-polythiol-based photocurable resin contains an olefin compound, a thiol compound, and a photopolymerization initiator. Such a polyene-polythiol-based photocurable resin has an advantage that it is not hindered by polymerization due to oxygen, compared to an acrylic photocurable resin. Further, the polyene-polythiol-based photocurable resin is provided with an appropriate hardness capable of protecting the unit base material 22 from impact damage and also becoming too brittle. For example, a polyene-polythiol photocuring after a suitable polymerization reaction The resin has a hardness in the range of D50 to D75. Further, in the invention of the present invention, "the appropriate polymerization reaction" means that the polymerization reaction is carried out under the conditions recommended by the material manufacturer providing the resin material. In addition, the above-mentioned characteristics relating to the hardness are not limited to the polyene-polythiol-based photocurable resin which undergoes polymerization reaction due to light irradiation, but are all olefin-containing compounds and thiol compounds. The polyene-polythiol resin is compatible. Further, the above-mentioned acrylic photocurable resin is not affected by polymerization inhibition by oxygen, and is not limited to the curing of the polyolefin-polythiol resin by light irradiation. In the case of the case where the polyolefin-polythiol-based resin is cured by other factors such as electron beam irradiation or heating, it is also possible. In other words, the polyene-polythiol-based resin may be composed of a polyene-polythiol-based electron beam curable resin or a polyolefin-polythiol-based thermosetting resin.

The polythiol-based thermosetting resin includes, for example, an olefin compound, a thiol compound, and a thermal polymerization initiator such as α,α' azobisisobutyronitrile (AIBN). By heating such a polythiol-based thermosetting resin to a specific heat curing temperature, for example, heating to 60 to 100 ° C or higher, the polythiol-based thermosetting resin can be cured.

Polyene-polysulfide in a polyene-polythiol photocurable resin The composition ratio of the olefinic compound and the thiol compound in the alcohol-based resin is appropriately set depending on the desired properties. For example, a polyene-polythiol system such as a polyene-polythiol-based photocurable resin is used. The resin has an olefin compound of 20 to 80% by weight and a thiol compound of 20 to 80% by weight. The sum of the weight % of the olefinic compound and the weight % of the thiol compound may be 100.

Further, a polyene-poly group such as a polyene-polythiol-based photocurable resin The thiol-based resin has an advantage that the hardening shrinkage is less than that of the acrylic resin such as the acrylic photocurable resin. Hereinafter, the relationship between the cover glass 20 and the curing shrinkage according to the present embodiment will be described.

As will be described later, the reinforcing portion 26 is made by applying a coating liquid. 27 formed by hardening. Therefore, if a large shrinkage occurs during the curing of the coating liquid 27, the accuracy of the size of the reinforcing portion 26 is lowered. Moreover, if a large shrinkage occurs, the adhesiveness between the reinforcing portion 26 and the unit base member 22 also decreases. Further, when a large contraction occurs in the thickness direction of the unit base member 22 (the normal direction of the first surface 22a and the second surface 22b of the unit base member 22), the surfaces 26a and 26b of the reinforcing portion 26 and the unit base are formed. A large step is generated between the faces 22a and 22b of the material 22, and as a result, the boundary between the reinforcing portion 26 and the unit base member 22 is easily visually recognized by the observer. Therefore, it is preferable that the resin material constituting the reinforcing portion 26 is a material that shrinks as much as possible during curing. According to the present embodiment, the reinforcing portion 26 is formed by using a polyene-polythiol-based resin such as a polyene-polythiol-based photocurable resin, even when shrinkage occurs during curing. In the case where the thickness of the unit base material 22 is 700 μm, the step difference between the faces 26a and 26b of the reinforcing portion 26 and the faces 22a and 22b of the unit base member 22 may be suppressed, for example, at 1 to 10 μm. Within the scope.

In addition, as will be described later, the thickness of the compressive stress layer 24a is thick. The degree is generally in the range of 10 to 100 μm. Therefore, when the shrinkage at the time of hardening is selected to be small, and the step difference between the unit base material 22 and the reinforcing portion 26 is suppressed to be in the range of 1 to 10 μm, respectively, the degree of shrinkage can be caused. The thickness of the compressive stress layer 24a is smaller. Therefore, even if the reinforcing portion 26 is contracted at the time of curing, the tensile stress layer 24b can be prevented from being exposed at the side surface 20c of the cover glass 20 or the wall surface 23c of the through hole 23 to be described later.

Hereinafter, the composition of the polyene-polythiol-based resin such as a polyene-polythiol-based photocurable resin will be described in detail.

The olefinic compound is a polyfunctional compound having two or more carbon-carbon double bonds in one molecule, and examples thereof include vinyl ethers, vinyl esters, allyl ethers, and allyl alcohol derivatives. , allylic isocyanide derivatives, styrenes, acrylic acid derivatives, methacrylic acid derivatives, divinylbenzene, and the like. When a part of the above-mentioned olefinic compound is arranged in order of high reactivity with a thiol compound, it is a vinyl ether, a vinyl ester, an allyl ether, and an allylic isocyanic acid derivative. Acrylic derivatives, styrene.

The thiol compound is a compound having two or more thiol groups in one molecule, and examples thereof include esters of mercaptocarboxylic acids and polyhydric alcohols, aliphatic polythiols, and aromatic polythiols. Other polythiols. One type or two or more types may be used.

Examples of the mercaptocarboxylic acid in the ester of the above mercaptocarboxylic acid and a polyhydric alcohol include indole acetic acid, α-mercaptopropionic acid, and β-mercaptopropionic acid.

The above olefin compound (a) and thiol compound (b) The mixing ratio is preferably such that the ratio of the number of unsaturated bonds of the olefinic compound (a) to the number of thiol groups of the thiol compound (b) is in the range of 2:1 to 1:2. If it is more than 1:2 and the amount of the thiol group is large, since the unreacted thiol group remains in a large amount in the composition after the hardening reaction, it is not preferable, and if the thiol group becomes 2:1, Less is less desirable because of the high adhesion of the thiol group and the fact that it is not hindered by the polymerization inhibition caused by oxygen.

The photopolymerization initiator is not particularly limited, but may be The initiator is polymerized by well-known light. Specifically, as a photopolymerization initiator, when it is a resin system having a radical polymerizable unsaturated group, acetophenones can be used (for example, under the trade name Irgacure 184 (manufactured by Ciba Specialty Chemicals Co., Ltd.) ) commercially available as 1-hydroxy-cyclohexyl-phenyl-one), diphenyl ketones, thioxanthones, ethyl phenyl ketones, benzyls, fluorenylphosphine oxides, benzoin, Benzoin methyl ether or the like is used singly or in combination.

The above photopolymerization initiator (c) is preferred, as opposed to The total amount of the olefin compound (a) and the thiol compound (b) is added in a ratio of 0.001 to 10% by mass. If it is less than 0.001% by mass, there is a problem that the photopolymerization reaction cannot be sufficiently caused. Moreover, even if it is added more than 10% by mass, the effect cannot be improved.

Next, referring to FIG. 5, for the side of the unit substrate 22 The shape of 22c and the reinforcing portion 26 will be described in more detail. Fig. 5 is a cross-sectional view showing the side surface 20c of the cover glass 20 of Fig. 3 in an enlarged manner.

First, the shape of the reinforcing portion 26 will be described. Figure 5 As shown in the above, the reinforcing portion 26 includes a first surface 26a extending in the lateral direction from the vicinity of the end portion 22ae of the first surface 22a on the same plane as the first surface 22a of the unit base material 22, On the same plane as the second surface 22b of the unit base material 22, the second surface 26b extending in the lateral direction from the vicinity of the end portion 22be of the second surface 22b, and the first surface 26a and the second surface of the reinforcing portion 26 Side 26c extending between faces 26b. Hereinafter, the advantages brought about by the reinforcing portion 26 including the first surface 26a and the second surface 26b will be described.

First, for the purpose of comparison, for the above patent The topics that can be considered in the 2 are explained. When the reinforcing portion for reinforcing the side surface of the substrate is provided by performing edge treatment on the outer peripheral surface of the substrate as in Patent Document 2, the surface of the reinforcing portion and the surface of the substrate are formed. There is a step. Therefore, at the boundary between the reinforcing portion and the substrate, scattering of light is likely to occur or a large change in transmittance and reflectance of light is caused. As a result, the boundary between the reinforcing portion and the substrate becomes easily visually recognized by the observer. That is, it can be inferred that the design of the cover glass will be lowered. Further, when the reinforcing portion of the cover glass is exposed to the outside, the operational feeling of the touch panel is hindered by the step.

In contrast, according to the embodiment, the unit substrate The first surface 22a of the 22 and the first surface 26a of the reinforcing portion 26 are positioned on the same plane. Similarly, the second surface 22b of the unit base member 22 and the second surface 26b of the reinforcing portion 26 are positioned on the same plane. That is, in the unit There is almost no step difference between the substrate 22 and the reinforcing portion 26. Specifically, the step between the first surface 22a and the second surface 22b of the unit base member 22 and the first surface 26a and the second surface 26b of the reinforcing portion 26 is 10 μm or less. Therefore, it is possible to suppress the situation in which the observer visually recognizes the boundary between the unit base material 22 and the reinforcing portion 26. Therefore, according to the reinforcing portion 26 of the present embodiment, it is possible to simultaneously ensure the strength of the side surface 20c of the cover glass 20 and the design of the cover glass 20. Moreover, there is no problem that the operation feeling of the touch panel is hindered due to the step. Further, as described above, the thickness of the compressive stress layer 24a is generally in the range of 10 to 100 μm. Therefore, when the step between the first surface 22a and the second surface 22b of the unit base member 22 and the first surface 26a and the second surface 26b of the reinforcing portion 26 is 10 μm or less, that is, when When the difference is smaller than the thickness of the compressive stress layer 24a, the compressive stress layer 24a of the unit base material 22 and the reinforcing portion 26 are at least partially overlapped at the side surface 22c of the unit base member 22. Therefore, the tensile stress layer 24b exposed at the side surface 22c of the unit base member 22 can be covered by the reinforcing portion 26 without a gap. Therefore, the impact resistance of the cover glass 20 can be more surely improved.

Preferably, the first surface 26a and the second surface of the reinforcing portion 26 are preferably 26b is formed on the same plane as the first surface 22a and the second surface 22b of the unit base member 22, and extends at least 300 μm from the end portion 22ae and the end portion 22be toward the lateral direction. Thereby, it is possible to more surely ensure the strength of the side surface 20c of the cover glass 20 and cover the glass. 20 design. In the same manner as in the case of the above-described step, the first surface 26a and the second surface 26b of the reinforcing portion 26 cover at least 300 μm from the end portion 22ae and the end portion 22be. The portion extending in the side direction and the first surface 22a and the second surface 22b of the unit base member 22 are spaced apart from each other by 10 μm or less in the thickness direction of the unit base member 22.

Next, the side surface 26c of the reinforcing portion 26 will be described. to In Fig. 5, the end of the first surface 26a of the reinforcing portion 26 is denoted by the component symbol 26ae, and the end of the second surface 26b of the reinforcing portion 26 is denoted by the component symbol 26be. As shown in Fig. 5, the side surface 26c is formed as a flat surface which is slightly flatly extended between the end portion 26ae and the end portion 26be. Further, the first surface 26a and the side surface 26c intersect at a slight angle, and similarly, the second surface 26b and the side surface 26c intersect at a slight angle. That is, in the present embodiment, the position of the end portion 26ae and the position of the end portion 26be in the left-right direction (the direction in which the first surface 26a and the second surface 26b are extended) in Fig. 5 coincide with each other.

Next, the shape of the side surface 22c of the unit substrate 22 is made. Description. As shown in FIG. 5, the side surface 22c of the unit base material 22 includes a first side surface 22d and a second side surface 22e. The first side surface 22d intersects the end portion 22ae of the first surface 22a of the unit base member 22, and extends toward the outer side as it approaches the second surface 22b side of the unit base member 22. Further, the second side surface 22e intersects the end portion 22be of the second surface 22b of the unit base member 22, and extends toward the outer side as it approaches the first surface 22a side of the unit base member 22, and then the first side surface 22d. meet. Therefore, the first The meeting portion between the side surface 22d and the second side surface 22e protrudes outward. In this case, since the reinforcing portion 26 is formed to sandwich the side surface 22c of the unit base member 22, the reinforcing portion 26 can be firmly adhered to the side surface 22c of the unit base member 22.

The first side surface 22d and the second side surface 22e having such a shape are, for example, as described later, when the base material 30 is divided to obtain the unit base material 22, the first surface side and the first surface of the base material 30 are obtained. The base material 30 is formed by wet etching from both sides of the two sides.

(covering the size of the glass)

Next, the size of the cover glass 20 will be described. First, the coating size of the reinforcing portion 26 provided on the side surface 22c of the unit base member 22 will be described. Here, the cover size refers to the length of the reinforcing portion 26 in the direction along the normal direction of the side surface 26c of the reinforcing portion 26. The normal direction of the side surface 26c of the reinforcing portion 26 is parallel to the left-right direction in FIG.

In FIG. 5, the minimum value of the covering size of the reinforcing portion 26, It is marked as the component symbol Tmin. Further, in the present embodiment, as described above, the first side surface 22d of the unit base member 22 is extended outward as it approaches the second surface 22b side. Moreover, the second side surface 22e of the unit base member 22 is extended toward the outer side as it approaches the first surface 22a side. Further, as described above, the side surface 26c of the reinforcing portion 26 is a flat surface that intersects the first surface 26a and the second surface 26b at right angles. Therefore, as shown in FIG. 5, in general, the first side 22d and the second side 22e meet each other. At the location, the coating size of the reinforcing portion 26 becomes the minimum value Tmin.

The minimum value Tmin of the coating size of the reinforcing portion 26 is Even when an impact is applied to the side surface 20c of the cover glass 20 or the like, the side surface 22c of the unit base material 22 can be appropriately set. For example, the minimum value Tmin of the coating size of the reinforcing portion 26 is set to 20 μm or more.

Further, in the present embodiment, the position of the first surface 26a is Alternatively, the position of the second surface 26b is such that the coating size of the reinforcing portion 26 is the maximum value. In addition, when the maximum value of the coating size of the reinforcing portion 26 is excessively large, it is presumed that when the impact is applied to the cover glass 20, the reinforcing portion 26 is easily peeled off from the unit base material 22. Further, since the proportion of the glass at the cover glass 20 is decreased and the proportion of the resin is increased, it is presumed that the strength of the cover glass 20 is also lowered. In view of this point, the maximum value of the coating size of the reinforcing portion 26 is preferably set to 250 μm or less at the portion that is covered as the thinnest portion (the portion indicated as the component symbol Tmin in FIG. 5). The portion covered with the thickest portion (in the portion indicated by the component symbol Tmax in Fig. 5) is set to be 500 μm or less.

As an example, in the example shown in FIG. 5, consider The coating size Tmin of the reinforcing portion 26 at the portion covered with the thinnest portion was set to 100 μm, and the covering size Tmax of the reinforcing portion 26 at the portion covered with the thickest portion was set to 300 μm.

Covering the thickness of the glass 20 (that is, the unit substrate 22) The thickness and the thickness of the reinforcing portion 26 are determined according to the required strength. The area of the cover glass 20 and the like are appropriately set, but are, for example, in the range of 0.1 mm to 1 mm.

(Manufacturing method of covering glass)

Next, a method of manufacturing the cover glass 20 formed by the above-described general configuration will be described with reference to FIGS. 6A to 7D.

First, referring to FIG. 6A to FIG. 6E (a), (b), for The construction of the unit laminate 30 having the unit base material 22 and the protective films 81 and 82 is described using a base material 30 made of a large tempered glass. 6A, 6B(a), 6C, 6D(a), and 6E(a) are cross-sectional views showing the substrate 30 in the present process. Further, Fig. 6E(b) is a cross-sectional view showing an enlarged display of the unit laminated body 35 shown in Fig. 6E(a). 6B(b) and 6D(b) are plan views showing the substrate 30 in this project.

First, as shown in Figure 6A, it is prepared by a large one. A substrate 30 made of tempered glass. The base material 30 includes a first surface 30a, a second surface 30b on the opposite side of the first surface 30a, and a side surface 30c extending between the first surface 30a and the second surface 30b. As shown in FIG. 6A, generally, a compressive stress layer 24a is formed on the first surface 30a, the second surface 30b, and the side surface 30c of the substrate 30, and further, inside the compressive stress layer 24a, there is a pull. Tensile stress layer 24b. In this manner, the surface of the substrate 30 is entirely formed by the compressive stress layer 24a.

Then, as shown in (a) and (b) of FIG. 6B, On the first surface 30a of the substrate 30, in a specific plural division, the shape The first decorative portion 60 and the touch panel sensing portion 40 (the element portion forming project) are formed. For example, in FIG. 6B(b), the first surface 30a of the base material 30 is divided into two rows by the upper and lower sides of the paper surface, and six divisions are formed in three rows in the left and right direction of the paper surface. Each of the first decorative portion 60 and the touch panel sensing portion 40 is formed. In addition, the number of divisions of the substrate 30 is not particularly limited. As a method of forming the first decorative portion 60 and the touch panel sensing portion 40 on the first surface 30a side of the substrate, a well-known method is preferably used, for example, a photolithography method is used. In the following description, the first decorative portion 60 and the touch panel sensing portion 40 are collectively referred to as the element portion 70.

Thereafter, it is implemented on the first surface 30a of the substrate 30 and A protective film forming process of the first protective film 81 and the second protective film 82 is provided in a plurality of specific divisions on the two faces 30b. First, as shown in FIG. 6C, the first protective film 81 in which the element portions 70 respectively provided in the plurality of divisions are continuously covered is provided on the first surface 30a of the substrate 30. Further, a second protective film 82 is provided on the second surface 30b of the substrate 30. In the example shown in FIG. 6C, the first protective film 81 and the second protective film 82 are provided so as to cover the entire area of the first surface 30a and the second surface 30b of the base material 30.

The protective films 81 and 82 are used as the use of hydrofluoric acid by using The wet etching described later will function to protect the resist layer of the element portion 70 when the substrate 30 is divided. The material constituting the protective films 81 and 82 is not particularly limited as long as it has resistance to the etching liquid used to divide the substrate 30. For example, as a structure As the material of the protective films 81 and 82, biaxially stretched polypropylene or non-stretched polypropylene having a thickness of 50 to 100 μm can be used. In this case, a sheet of biaxially stretched polypropylene or non-stretched polypropylene is attached to the first surface 30a of the substrate 30 and the second surface 30b by an adhesive layer having a thickness of 20 μm. The protective films 81 and 82 are formed.

After that, as shown in (a) and (b) of Figure 6D, The first protective film 81 and the second protective film 82 which are provided over the entire area of the first surface 30a and the second surface 30b are divided at each of the first surface 30a and the second surface 30b. As a result, a gap is formed along the boundary between the respective regions in the first protective film 81 covering the respective element portions 70 and the second protective film 82 corresponding thereto.

The first protective film 81 and the second protective film 82 are separated The method is not particularly limited, and various methods can be employed. For example, a mold having a shape corresponding to the shape of the first protective film 81 shown in FIG. 6D(b) may be used to remove unnecessary portions (parts of the gap) of the first protective film 81. . Similarly to the second surface 30b side, an unnecessary portion of the second protective film 82 (which is a portion of the gap) can be used by using a mold having a shape corresponding to the mold for the first protective film 81. Remove. In addition to this, unnecessary portions of the first protective film 81 and the second protective film 82 may be removed by laser processing.

Thereafter, as shown in FIG. 6E(a), the implementation is along The cutting process in which the base material 30 is cut by the gap between the first protective film 81 and the second protective film 82 in each division of the substrate 30 is provided. Specifically, The first protective film 81 and the second protective film 82 are used as a resist layer from the first surface 30a side and the second surface 30b side of the substrate 30, and the substrate 30 is wet-etched to form the substrate. 30 cut off. As the etching liquid, hydrofluoric acid or the like is used as described above. As a result, as shown in FIG. 6E(a), the element portion 70 including the glass base material 22 and the element portion 70 provided on the first surface 22a side of the unit substrate 22 can be obtained and disposed on the unit base. The first surface 22a of the material 22 covers the first protective film 81 of the element portion 70 and the unit laminated body 35 of the second protective film 82 provided on the second surface 22b of the unit substrate 22.

Figure 6E(b) is for the single shown in Figure 6E(a) The layered laminate 35 is a cross-sectional view showing an enlarged display. As shown in FIG. 6E(b), the first protective film 81 is configured to protrude further in the lateral direction than the first surface 22a of the unit base member 22. Similarly, the second protective film 82 is configured to protrude further in the lateral direction than the second surface 22b of the unit base member 22. The relationship between the unit base material 22 and the first protective film 81 and the second protective film 82 is covered by the unit substrate by performing the above-described cutting process using the etching liquid. In the case where both of the first surface 22a and the second surface 22b of the 22 are etched and the unit substrate 22 is penetrated, the etching process is continued. Further, in the etching process, generally, in the vicinity of the first surface 22a and the second surface 22b of the side surface 22c of the unit substrate 22, the etching is performed regardless of the depth direction or the horizontal direction. Conductively. Therefore, as shown in FIG. 6E(b), in general, the first surface 22a and the second surface 22b of the side surface 22c of the unit substrate 22 are close to each other. On the side, the etching system proceeds to a deeper position than the intermediate portion between the first surface 22a and the second surface 22b. As a result, it is possible to obtain the first side surface 22d that extends toward the outer side while approaching the end portion 22ae, and the first side surface 22d that extends toward the outer side as close to the second surface 22b side, and also approaches the first surface 22a while intersecting the end portion 22be. The second side surface 22e that extends laterally toward the outside.

Next, referring to FIG. 7A to FIG. 7D, An example of the work of obtaining the cover glass 20 which is reinforced with the side surface is provided in the side surface 22c of the unit base material 22 of the position laminated body 35 in order to obtain a reinforcing portion (resin or the like).

First, as shown in Figure 7A, the implementation will contain purple The external hardening resin or the coating liquid 27 of the curable material such as a thermosetting resin is applied to the coating process on the side surface 22c of the unit substrate 22. Here, a case where a coating liquid containing an acrylic resin and a photopolymerization initiator is used will be described.

In the coating process, the coating liquid 27 is filled in a space surrounded by the side surface 22c of the unit base material 22, the first protective film 81, and the second protective film 82 as shown in FIG. 7A. Further, as shown in FIG. 7A, the coating liquid 27 may be applied to the extent that it overflows on the end surface 81c of the first protective film 81 and the end surface 82c of the second protective film 82.

Then, it will overflow on the end surface 81c of the first protective film 81. The coating liquid 27 on the end surface 82c of the second protective film 82 is scraped off using a doctor blade or the like. As a result, as shown in FIG. 7B, the surface of the coating liquid 27 is aligned with the end surface 81c of the first protective film 81 and the end surface 82c of the second protective film 82. That is, the first of the coating liquid 27 The position of the end portion of the liquid surface on the side of the protective film 81 is the same as the position of the end surface 81c of the first protective film 81, and the position of the end portion of the liquid surface on the second protective film 82 side of the coating liquid 27 is The positions of the end faces 82c of the second protective film 82 coincide with each other.

Thereafter, it is implemented to be disposed on the side of the unit substrate 22 The hardening work of the coating liquid 27 on 22c is hardened. Here, the coating liquid 27 is cured by irradiating the coating liquid 27 with light such as ultraviolet rays. Thereby, the reinforcing portion 26 is formed on the side surface 22c of the unit base member 22.

Next, the first surface on the first surface 22a of the unit substrate 22 The protective film 81 and the second protective film 82 on the second surface 22b of the unit substrate 22 are removed. Thereby, as shown in FIG. 7C, the cover glass 20 provided with the unit base material 22 and the reinforcement part 26 provided in the side surface 22c of the unit base material 22 can be obtained. Thereafter, as shown in FIG. 7D, a second decoration may be provided at a position on the first surface 22a side of the unit base member 22 or on the outer side of the first decorative portion 60 on the first surface 26a side of the reinforcing portion 26. Section 62. The second decorative portion 62 is formed, for example, in such a manner as to exhibit the same color as the first decorative portion 60. By further providing such a second decorative portion 62, the range of the inactive area Aa2 capable of exhibiting a desired color can be further expanded outward, and the image can be prevented from leaking light from the outer peripheral portion. Design improvement. Moreover, it is preferable that the second decorative portion 62 is configured to overlap the reinforcing portion 26 when viewed along the normal direction of the first surface 20a of the cover glass 20.

According to this embodiment, it is on the side of the unit substrate 22. The surface 22c is provided with a reinforcing portion 26 made of a curable resin. Therefore, when the impact is applied to the side surface 20c of the cover glass 20, the force transmitted to the side surface 22c of the unit base material 22 is relieved by the reinforcing portion 26, and can be applied to the unit base material 22. The occurrence of damage such as chipping at the side surface 22c is suppressed. Thereby, even when the compressive stress layer is not formed on the side surface 22c of the unit base material 22, the impact resistance of the cover glass 20 can be sufficiently improved. Further, even when the tensile stress layer 24b is exposed on the side surface 22c of the unit base member 22, the exposed tensile stress layer 24b can be covered by the reinforcing portion 26, so that it is possible to The impact resistance of the cover glass 20 is sufficiently improved.

Further, according to the present embodiment, the reinforcing portion 26 is formed. The resin material contains a polyene-polythiol resin. Therefore, even when the reinforcing portion 26 is exposed to the external environment such as the atmosphere, it is possible to suppress the polymerization reaction from being caused by oxygen. Thereby, it is possible to obtain the reinforcing portion 26 having a desired hardness which has undergone sufficient polymerization. Moreover, by using a polyene-polythiol-based resin, it is possible to prevent the hardening of the reinforcing portion 26 from being excessively increased. Therefore, it is possible to obtain the reinforcing portion 26 which maintains a good balance between hardness and toughness. Moreover, by using a polyene-polythiol-based resin, the wettability of the surface of the reinforcing portion 26 can be appropriately ensured. Therefore, the coating liquid applied to the first surface 26a of the reinforcing portion 26 after forming the reinforcing portion 26 (for example, the coating liquid for forming the second decorative portion 62) can be stably settled on the first surface 26a. on. That is, the system can fully ensure The printing suitability of the first surface 26a of the reinforcing portion 26. By this, it is possible to uniformly form the constituent elements of the second decorative portion 62 and the like on the first surface 26a of the reinforcing portion 26.

Further, in the present embodiment, the reinforcing portion 26 is as above. In general, the second protective film 81 that protrudes in the lateral direction from the first surface 22a of the unit base material 22 protrudes from the second surface 22b of the unit base material 22 toward the lateral direction. The space in which the protective film 82 is positioned. Therefore, as shown in FIG. 7C and FIG. 7D, the first surface 22a of the unit base member 22 and the first surface 26a of the reinforcing portion 26 are positioned on the same plane. Similarly, the second surface 22b of the unit base member 22 and the second surface 26b of the reinforcing portion 26 are positioned on the same plane. That is, there is almost no step difference between the unit base material 22 and the reinforcing portion 26, almost or completely. Therefore, it is possible to suppress the situation in which the observer visually recognizes the boundary between the unit base material 22 and the reinforcing portion 26. Therefore, according to the reinforcing portion 26 of the present embodiment, it is possible to simultaneously ensure the strength of the side surface 20c of the cover glass 20 and the design of the cover glass 20. Moreover, when the outer conductor such as a finger is slid on the cover glass 20, the feeling that the outer conductor is hooked by the boundary between the unit base material 22 and the reinforcing portion 26 can be suppressed. Therefore, it is possible to suppress the situation in which the operational feeling of the touch panel is hindered due to the step difference. Further, it is possible to suppress the situation in which the outer conductor of the finger or the like is injured due to the step.

Further, in the present embodiment, at the reinforcing portion 26, for example, As described above, the first protective film 81 is overflowed by using a doctor blade or the like. The coating liquid 27 on the end surface 81c and the end surface 82c of the second protective film 82 is scraped off, and the side surface 26c of the reinforcing portion 26 is surface-finished. Therefore, the position of the end portion 26ae of the first surface 26a of the reinforcing portion 26 obtained by curing the coating liquid 27 coincides with the position of the end surface 81c of the first protective film 81. Similarly, the position of the end portion 26be of the second surface 26b of the reinforcing portion 26 coincides with the position of the end surface 82c of the second protective film 82. According to the present embodiment, the position of the end portion 26ae of the first surface 26a of the reinforcing portion 26 and the end of the second surface 26b can be determined based on the positions of the end faces 81c and 82c of the protective films 81 and 82. The location of the 26be.

As described above, the reinforcing portion 26 is formed by the coating liquid 27 having a specific fluidity. Therefore, when the coating liquid 27 is applied without using a frame as in the case of the protective films 81 and 82, it is difficult to precisely control the size of the coating liquid 27 such as the thickness and shape. On the other hand, the end faces 81c and 82c of the protective films 81 and 82 are as described above, and their positions are determined with high precision by processing using a mold or a laser. Therefore, according to the present embodiment, the accuracy of the dimensions such as the thickness and shape of the coating liquid 27 can achieve the accuracy of the accuracy in the processing using the mold or the laser. Therefore, according to the present embodiment, the positions of the end portions 26ae and 26be of the reinforcing portion 26 can be determined with good precision, that is, the position at which the end portion of the cover glass 20 can be formed with good precision. Thereby, the ease of construction and the yield can be improved when assembling the cover glass 20, the display device 15, and the casing. Also, when covering as in the present embodiment When the first decorative portion 60 and the touch panel sensing portion 40 are provided in the glass 20, the processing accuracy of the first decorative portion 60 and the touch panel sensing portion 40 with respect to the display device 15 can be improved. . Thereby, the design and operability of the height of the display device 10 with the cover glass can be achieved.

Further, when the side surface 26c of the reinforcing portion 26 is formed at the end portion In the case of a flat surface extending slightly between 26ae and the end portion 26be, not only the position of the end portions 26ae and 26be of the reinforcing portion 26 but also the position of the entire side surface 26c of the reinforcing portion 26 may be responded to. The positions of the end faces 81c and 82c of the protective films 81 and 82 are determined. That is, not only the end portion of the cover glass 20 but also the processing accuracy of the entire area of the side surface 20c of the cover glass 20 can be improved.

Moreover, according to this embodiment, the cover glass 20 is Since the side surface 20c is formed of the reinforcing portion 26 made of a resin, the edge portion of the side surface 20c of the cover glass 20 is not required as compared with the case where the side surface 20c of the cover glass 20 is formed of glass. The anti-cracking process caused by the chamfering or the like is performed.

In addition, the reinforcing portion 26 covering the glass 20 may also be configured. The same color as that of the first device portion 60 and the second decorative portion 62 provided on the first surface 20a side of the cover glass 20 is exhibited. For example, the reinforcing portion 26 may include a coloring pigment having the same color as the coloring pigment contained in the first decorative portion 60 and the second decorative portion 62. In this case, the area around the outer edge of the non-action area Aa2 is the area of the first decorative part 60 and the second decorative part 62 which are visually recognized and positioned further inside. The area of the same color in the domain. Therefore, it is possible to obtain the same design effect as in the case where the first decorative portion 60 and the second decorative portion 62 are extended to the outer edge of the non-operating region Aa2.

In general, the first decorative portion 60 and the second decorative portion 62 are coated on the cover glass 20 (on the unit base material 22 or the reinforcing portion 26) by applying a coating liquid containing a resin material and a pigment. Formed. On the other hand, it is not easy to apply the coating liquid correctly at the area around the outer edge of the non-action area Aa2.

In the case where the reinforcing portion 26 is colored as described above, the first decorative portion 60 and the second decorative portion 62 are not always provided in the region around the outer edge of the non-operating region Aa2, and the non-action is not performed. The area around the outer edge of the area Aa2 is visually recognized in the desired color. Therefore, it is possible to make the process of providing the first decorative portion 60 and the second decorative portion 62 easier.

In addition, the "same color" means that the chromaticities of the two colors are close to each other and the degree of difference in color cannot be visually recognized. More specifically, the term "identical color" means that the color difference ΔE ^* _ab of the two colors is 10 or less, and preferably 3 or less. In addition, the "different color" means that the color difference ΔE ^* _ab of two colors is larger than 10. Thereto, so-called color difference △ E ^* _ab, is based on the L ^* a ^* b ^* color system of L ^*, a ^* and b ^* values of the calculated, and as will be connected to the visually performed The value of the indicator of the difference in color when observing the situation.

In addition, various types can be applied to the above embodiments. change. In the following, one side of the reference picture, one for several variants Bright. In the following description and the drawings used in the following description, the components that can be configured in the same manner as the above-described embodiments are used with the component symbols used for the portions corresponding to the above-described embodiments. The same component symbols are omitted, and the repeated description is omitted. Further, in the case where the operational effects that can be obtained in the above-described embodiments are apparently obtained in the modified example, the description will be omitted.

(First Modification)

In the above-described embodiment, the element portion of the element portion 70 in which the first decorative portion 60 and the touch panel sensing portion 40 are formed on the first surface 30a of the substrate 30 is formed prior to the substrate. An example in which the protective film forming process of the first protective film 81 and the second protective film 82 is provided on the 30 is shown. However, the first protective film 81 and the second protective film 82 may be provided on the substrate 30 in a state in which the element portion 70 is not provided, and then the substrate 30 may be cut. The work of breaking and the work of providing the reinforcing portion 26 on the side surface 22c of the unit base member 22. As a result, as shown in FIG. 8, a cover glass 20 including the unit base member 22 and the reinforcing portion 26 provided on the side surface 22c of the unit base member 22 can be obtained.

In the present modification shown in FIG. 8, the reinforcing portion 26 is also It can be constructed in such a way as to present a specific color. For example, the reinforcing portion 26 may also contain a coloring pigment that exhibits a specific color. In this case, the first decorative portion 60 or the second decorative portion 62 can be omitted, and the design of the light leakage from the outer peripheral portion can be prevented. Rise. Further, although not shown, in the present modification shown in FIG. 8, the cover glass 20 may be further provided with the first surface of the reinforcing portion 26 after the reinforcing portion 26 is formed. The decorative part on 26a.

(Second modification)

In the first modification described above, the first protective film 81 and the second protection are provided for the base material 30 in a state in which both the first decorative portion 60 and the touch panel sensing portion 40 are not formed. An example of the film 82 is shown. However, the first protective film 81 and the first substrate are provided in the substrate 30 in a state in which the first decorative portion 60 is not formed, but the touch panel sensing portion 40 is not provided. 2 The protective film 82 is followed by a process of cutting the substrate 30 and a process of providing the reinforcing portion 26 on the side surface 22c of the unit substrate 22. As a result, as shown in FIG. 9 , the first decorative portion 60 including the unit substrate 22 and the first surface 22 a of the unit substrate 22 and the unit substrate 22 can be obtained. The reinforcing portion 26 on the side surface 22c covers the glass 20. Further, as shown in FIG. 9 , the cover glass 20 may further include a second decorative portion 62 that is provided at a position on the outer side of the first decorative portion 60 after the reinforcing portion 26 is formed.

(Third Modification)

After the coating liquid 27 is hardened and the reinforcing portion 26 is obtained, the shape of the side surface 26c, that is, the shape of the side surface 20c of the cover glass 20 can be adjusted by processing the side surface 26c of the reinforcing portion 26. Reason. Since the reinforcing portion 26 is generally made of a resin material as described above, the side surface 20c of the cover glass 20 is processed and obtained in comparison with the case where the side surface 20c of the cover glass 20 is formed of tempered glass. The shape of the desired thing becomes easier. Further, it is also difficult to cause a decrease in strength or a microcracking due to processing as a processing method, and for example, a processing using a grinder can be employed.

For example, as shown in FIG. 10, it is also possible to The side surface 26ae on the first surface 26a side of the portion 26 and the end portion 26be on the second surface 26b side are cut away, and the side surface 26c of the reinforcing portion 26 is processed. In the example shown in Fig. 10, both the portion of the side surface 26c of the reinforcing portion 26 that intersects the first surface 26a and the portion that intersects the second surface 26b are processed into rounded surfaces. Even in this case, as long as the unprocessed portion (the unprocessed portion 26d) remains in a portion of the side surface 22c, it can be ensured based on the above-described coating method using the protective films 81 and 82. The dimensional accuracy at the height of the cover glass 20. In addition, although FIG. 10 shows an example in which the side surface 26c is processed so that the side surface 26c becomes a rounded surface, it is not limited to this, but it is not shown in figure, It is also possible to process the side surface 26c so that the side surface 26c becomes an angular surface. Further, although not shown, at least one of the end portion 26ae on the first surface 26a side of the reinforcing portion 26 and the end portion 26be on the second surface 26b side, for example, at least the first surface 26a can be provided. The side end portion 26a of the reinforcing portion 26 is processed by cutting the side end portion 26ae.

(Fourth Modification)

In the above-described embodiment, the coating liquid 27 is formed by coating the coating liquid 27 in the space surrounded by the side surface 22c of the unit base member 22, the first protective film 81, and the second protective film 82. An example of the reinforcing portion 26 is shown, but it is not limited thereto. In the case where the reinforcing portion 26 or the reinforcing portion such as the hole reinforcing portion 28 to be described later is formed by another method, the resin material constituting the reinforcing portion contains the polyene-polysulfide. The alcohol-based resin is a reinforcing portion having a desired hardness and toughness after being subjected to a sufficient polymerization reaction. Moreover, it is possible to sufficiently ensure the printing suitability of the reinforcing portion. Examples of the method for forming the reinforcing portion include an injection molding method, a dispensing method, a spray coating method, a roll coating method, and a dipping method. Fig. 11 is a cross-sectional view showing an example of a cover glass 20 provided with a reinforcing portion 26 formed by a dipping method.

(Fifth Modification)

In the above-described embodiment, the side surface 22c includes the end portion 22ae of the first surface 22a of the unit base material 22, and also faces the second surface 22b side of the unit base material 22 toward the outer side. The first side surface 22d which is extended and the second side surface 22e which extends toward the outer side as it approaches the first surface 22a side of the unit base material 22 while intersecting the end portion 22be of the second surface 22b of the unit base material 22 Made a show. However, as long as the reinforcing portion 26 can be provided, the shape of the side surface 22c is not particularly Limited. For example, as shown in FIG. 12, the side surface 22c can also be extended so as to be orthogonal to the first surface 22a and the second surface 22b. The side surface 22c having such a shape can be formed, for example, by cutting the substrate 30 with a laser. Further, a scribe line may be formed on the surface of the substrate 30 by using a cutter or a laser, and then a base line is used as a starting point by applying a striking force or a bending stress to the substrate 30. The material 30 is severed to form the side surface 22c shown in FIG.

(Sixth Modification)

In the above-described embodiment, an example in which the tensile stress layer 24b is exposed on the side surface 22c of the unit base member 22 is shown. However, it is not limited thereto, and as shown in FIG. 13, it may be formed not only at the first surface 22a and the second surface 22b of the unit substrate 22 but also at the side surface 22c. Layer 24a. In this case as well, by providing the reinforcing portion 26 on the side surface 22c of the unit base member 22, it is possible to conduct the unit substrate 22 when an impact is applied to the side surface 20c of the cover glass 20. The force at the side 22c is soothing.

In the fifth and sixth modifications described above, on the side The method of forming the reinforcing portion 26 on the surface 22c is not particularly limited, and the methods and the like described in the above-described embodiments and modifications may be suitably employed. In addition, when the coating liquid 27 is applied by the first protective film 81 and the second protective film 82 to form the reinforcing portion 26, the first protective film 81 and the second protective film 82 may be Material 30 cut After the unit substrate 22 is obtained, the unit substrate 22 is placed on the first surface 22a of the unit substrate 22 and the second surface 22b.

(Seventh Modification)

In the above-described embodiment and each modification, an example in which the reinforcing portion 26 is formed on the side surface 22c which is formed outside the unit base material 22 on the side surface of the unit base member 22 is shown. However, it is not limited to this. As shown in FIG. 14 , when the through hole 25 is formed in the unit base material 22 , a reinforcing portion may be provided on the wall surface 25 c of the through hole 25 . In other words, in the present invention, the "side surface of the unit base member 22" is a concept including the wall surface 25c of the through hole 25 formed in the unit base material 22. The through hole 25 is, for example, a device for mounting a camera or a speaker on the display device. In Fig. 14 and Fig. 15 which will be described later, in order to distinguish the reinforcing portions provided on the side surface 22c which is formed outside the unit base material 22, the reinforcing portion provided on the wall surface 25c of the through hole 25 is referred to as a component symbol. 28 to mark.

Figure 15 is for the through hole 25 shown in Figure 14. A cross-sectional view of the construction of the reinforcing portion 28 is formed on the wall surface 25c. In addition, in Fig. 15, a pattern in which the reinforcing portion 26 is formed not only on the wall surface 25c of the through hole 25 but also on the side surface 22c which is formed outside the unit base member 22 is shown. In the example shown in FIG. 15 , the first protective film 81 and the second protective film 82 are provided so as to protrude further inward than the wall surface 25 c of the through hole 25 of the unit base member 22 . Therefore, the wall surface 25c of the through hole 25 of the unit base material 22 is the first The coating liquid 27 is applied to the space surrounded by the protective film 81 and the second protective film 82, and as shown in Fig. 15, the reinforcing portion 28 can be formed on the wall surface 25c with high dimensional accuracy.

In the present modification, the same applies to the unit base. The reinforcing portion 28 on the wall surface 25c of the through hole 225 of the material 22 contains a polyene-polythiol resin. Therefore, it is possible to provide the reinforcing portion 28 having a desired hardness which has undergone sufficient polymerization reaction on the wall surface 25c of the through hole 25. Moreover, the printing suitability of the reinforcing portion 28 can be sufficiently ensured.

(Other variants)

In addition, in the above-described embodiment, the reinforcing portion 26 and the coating liquid 27 are exemplified by a curable resin which is polymerized by heating or ultraviolet irradiation or the like and which is cured by the curing reaction. However, the system is not limited to this. When it is applied to the side surface 22c of the unit base material 22 to have specific fluidity and can be cured later, the first embodiment and each modification example include the second embodiment and each modification described later. As the coating liquid 27 for forming the reinforcing portion 26, various fluids can be used. For example, as the coating liquid 27, a fluid obtained from a resin material in a state of being melted by heat can also be used. In this case, after the coating liquid 27 is applied onto the side surface 22c of the unit base material 22, the coating liquid 27 is cooled and solidified to harden the coating liquid 27. Thereby, the reinforcing portion 26 containing the resin material can be obtained. In this way, in the present embodiment, the so-called "hard" The concept of not only curing the resin material by heating or ultraviolet irradiation but also the phenomenon of curing the resin material by cooling and solidifying it is included. Further, the resin material may be cooled and solidified by natural cooling, or the resin material may be cooled and solidified by forced cooling. Moreover, "curing" means a state of changing from a state of a gas or a liquid to a solid.

In addition, although it is for the above embodiments, it is for several The modification is described, but it is a matter of course that a plurality of modifications can be suitably combined and applied.

Second embodiment

Next, a second embodiment of the present invention will be described. In the modification shown in FIG. 14 and FIG. 15 of the above-described first embodiment, the side surface of the unit base member 22 provided with the reinforcing portion is formed as a through hole 25 formed in the unit base member 22. An example of wall 25c is shown. In the present embodiment, a case where the reinforcing portion 28 is provided on the wall surface 25c of the through hole 25 will be described in more detail. In the present embodiment, the reinforcing portion 28 provided at the wall surface 25c of the through hole 25 is also referred to as a hole reinforcing portion 28. Further, the reinforcing portion provided on the side surface 22c constituting the outer shape of the unit base member 22 is also referred to as a side reinforcing portion 26. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the detailed description thereof will be omitted.

(covering glass)

Fig. 16 is a plan view showing the cover glass 20 in the present embodiment. As shown in FIG. 16, the cover glass 20 is provided with a unit base material 22 having a rectangular shape having a square angle as viewed in plan, and a reinforcing member provided on the side surface 22c of the unit base material 22. Part 26. The side reinforcing portion 26 is arbitrarily provided for protecting the side surface 22c of the unit base member 22. In the example shown in Fig. 16, the side reinforcing portion 26 is provided so as to surround the side surface 22c of the unit base member 22 in plan view. The shape of the side reinforcing portion 26 and the side surface 22c of the unit base member 22 is the same as that of the first embodiment described above, and thus detailed description thereof will be omitted.

As shown in Fig. 16, generally, at the cover glass 20, The through hole 23 is formed, and the wall surface of the through hole 23 is constituted by the hole reinforcing portion 28. The hole reinforcing portion 28 is provided on the wall surface of the through hole formed in the unit base member 22 in order to improve the impact resistance of the through hole 23. Hereinafter, the hole reinforcing portion 28 will be described in more detail with reference to FIGS. 17 and 18. Figure 17 is a cross-sectional view along line XXVII of the cover glass 20 shown in Figure 16. Further, Fig. 18 is a cross-sectional view showing the through hole 23 of the cover glass 20 of Fig. 17 in an enlarged manner.

As shown in Fig. 17, generally, the hole reinforcement portion 28 is provided. It is formed on the wall surface 25c of the through hole 25 formed in the unit base material 22. In addition, as is clear from the above-described FIG. 19D(c), the "through-hole 25 of the unit base material 22" is a through-unit unit in a state in which the hole reinforcing portion 28 is not provided. The hole of the material 22. Further, the term "through-hole 23 of the cover glass 20" means that the wall surface 23c thereof is A hole for covering the glass 20 is formed by the hole reinforcing portion 28 provided on the wall surface 25c of the through hole 25 of the unit base member 22. In addition, in the drawing attached to the present invention, in order to prevent the drawing from being complicated, the through hole which is provided with the hole reinforcing portion 28 or the coating liquid 27 to be described later is, in principle, the component symbol 23 is added. The component symbol 25 is omitted.

As shown in Figure 18, the tensile of the unit substrate 22 should be The force layer 24b reaches up to the wall surface 25c of the through hole 25 of the unit substrate 22. That is, the tensile stress layer 24b is exposed at the wall surface 25c of the through hole 25 of the unit base member 22. Therefore, the wall surface 25c of the through hole 25 of the unit base material 22 is weaker than the first surface 22a and the second surface 22b of the unit base material 22 in terms of damage such as chipping. The hole reinforcing portion 28 is provided for protecting the wall surface 25c of the through hole 25 of the unit base member 22.

As a material constituting the hole reinforcing portion 28, for example, A curable resin which is hardened by heating or ultraviolet irradiation or the like is used. In this case, the hole reinforcing portion 28 has a desired fluidity during molding before curing, and the hole reinforcing portion 28 has a desired hardness and strength after curing. By this, it is possible to simultaneously achieve the goals of formability, hardness, and strength. Further, similarly to the case of the first embodiment described above, the material constituting the hole reinforcing portion 28 may include a polyene-polythiol resin.

(hole reinforcement)

Next, referring to FIG. 18, the through hole 25 for the unit substrate 22 is used. The wall surface 25c and the shape of the hole reinforcing portion 28 will be described in more detail.

First, the shape of the hole reinforcing portion 28 will be described. Such as As shown in FIG. 18, the hole reinforcing portion 28 includes a first surface 28a extending from the end portion 22af of the first surface 22a of the unit base member 22 and extending in the lateral direction, and a unit surface unit 22 The second surface 28b extending toward the side direction and the side surface 28c existing between the first surface 28a and the second surface 28b are formed by the end portion 22bf of the second surface 22b. In the example shown in Fig. 18, the first surface 28a of the hole reinforcing portion 28 is positioned on the same plane as the first surface 22a of the unit base member 22. Similarly, the second surface 28b of the hole reinforcing portion 28 is positioned on the same plane as the second surface 22b of the unit base member 22. In other words, as in the case of the reinforcing portion 26 in the first embodiment described above, there is almost no step difference between the unit base member 22 and the hole reinforcing portion 28. Specifically, the step between the first surface 22a and the second surface 22b of the unit base member 22 and the first surface 28a and the second surface 28b of the hole reinforcing portion 28 is 10 μm or less. Therefore, the same advantages as those in the case of the reinforcing portion 26 of the first embodiment can be obtained. For example, it is possible to simultaneously ensure the strength of the through hole 23 covering the glass 20 and the design of the cover glass 20.

Next, the side surface 28c of the hole reinforcing portion 28 is said. Bright. In Fig. 18, the inner end portion of the first surface 28a of the hole reinforcing portion 28 is denoted by the component symbol 28ae, and the inner end portion of the second surface 28b of the hole reinforcing portion 28 is denoted by the component symbol 28be. . As shown in Fig. 18, the first surface 28a and the second surface of the hole reinforcing portion 28 are generally used. Further, 28b may be extended on the same plane as the first surface 22a and the second surface 22b of the unit base member 22 until reaching the end portion 28ae and the end portion 28be. Alternatively, the first surface 28a and the second surface 28b of the hole reinforcing portion 28 may be on the same plane as the first surface 22a and the second surface 22b of the unit base member 22, and may cover a specific distance. For example, it covers at least 300 μm, and extends from the end portion 22af and the end portion 22bf toward the side direction, and then is bent or bent. In the same manner as in the case of the above-described step, the first surface 28a and the second surface 28b of the hole reinforcing portion 28 cover at least 300 μm from the end portion 22af and the end portion. The portion extending in the side direction and the first surface 22a and the second surface 22b of the unit base member 22 are 22bf, and the interval between the two in the thickness direction of the unit base member 22 is 10 μm or less.

Next, the wall surface of the through hole 25 of the unit substrate 22 is applied. The shape of 25c is explained. As shown in FIG. 18, the wall surface 25c of the through hole 25 generally includes a first wall surface 25d and a second wall surface 25e. The first wall surface 25d intersects the first surface 22a of the unit base member 22, and extends toward the center side of the through hole 25 as it approaches the second surface 22b side of the unit base member 22. In addition, the second wall surface 25e intersects the second surface 22b of the unit base material 22, and extends toward the center side of the through hole 25 as it approaches the first surface 22a side of the unit base material 22, and then the first wall surface 25d meeting. Therefore, similarly to the case of the side surface 22c, the meeting portion between the first wall surface 25d and the second wall surface 25e protrudes outward. In this case, the hole reinforcing portion 28 is formed as the wall surface 25c of the unit base member 22. Since the shape of the pinch is formed, the hole reinforcing portion 28 can be firmly adhered to the wall surface 25c of the through hole 25 of the unit base member 22.

The first wall surface 25d and the second wall surface 25e having such a shape are the same as those of the first side surface 22d and the second side surface 22e of the side surface 22c, and can be formed from the first surface 22a side of the unit base material 22 and The unit substrate 22 is wet-etched and the through holes 25 are formed on both sides of the two faces 22b.

Next, for the through hole 25 provided in the unit base material 22 The hole in the wall surface 25c is described by the size of the reinforcing portion 28. Here, the cover size of the hole reinforcing portion 28 is the same as the case of the reinforcing portion 26 of the first embodiment described above, and refers to the hole reinforcing portion 28 in the direction along the normal direction of the side surface 28c. length. The minimum value Tmin and the maximum value Tmax of the coating size of the hole reinforcing portion 28 can be set to the same range as in the case of the reinforcing portion 26 of the first embodiment described above.

Covering the thickness of the glass 20 (that is, the unit substrate 22) The thickness, the thickness of the side reinforcing portion 26, and the thickness of the hole reinforcing portion 28 are appropriately set depending on the required strength and the area of the cover glass 20, but are, for example, in the range of 0.1 mm to 1 mm.

(Manufacturing method of covering glass)

Next, a method of manufacturing the cover glass 20 formed by the above-described general configuration will be described with reference to FIGS. 19A to 20D.

First, referring to Figs. 19A to 19D(a), (b), (c) for forming a substrate 30 made of large tempered glass The construction of the unit laminate 35 having the unit substrate 22 and the protective films 81 and 82 will be described. 19A, 19B, 19C(a), and 19D(a) are cross-sectional views showing the substrate 30 in the present process. Further, Fig. 19D(b) is a cross-sectional view showing an enlarged view of the side surface 22c of the unit base member 22 of the unit laminated body 35 shown in Fig. 19D(a), and Fig. 19D(c) is A cross-sectional view showing an enlarged view of the through hole 25 of the unit base member 22 of the unit laminated body 35 shown in Fig. 19D (a) is shown. Further, Fig. 19C(b) is a plan view showing a case where the substrate 30 shown in Fig. 19C(a) is observed from above.

First, as shown in Figure 19A, the preparation is made up of large The substrate 30 made of tempered glass. The base material 30 includes a first surface 30a, a second surface 30b on the opposite side of the first surface 30a, and a side surface 30c existing between the first surface 30a and the second surface 30b. As shown in Fig. 19A, generally, a compressive stress layer 24a is formed on the first surface 30a, the second surface 30b, and the side surface 30c of the substrate 30, and further, inside the compressive stress layer 24a, there is a pull. Tensile stress layer 24b. In this manner, the surface of the substrate 30 is entirely formed by the compressive stress layer 24a.

Next, it is implemented on the first surface 30a of the substrate 30 and A protective film forming process of the first protective film 81 and the second protective film 82 is provided in a plurality of specific divisions on the two faces 30b. First, as shown in FIG. 19B, a first protective film 81 is provided on the first surface 30a of the substrate 30, and a second protective film is provided on the second surface 30b of the substrate 30. 82. In the example shown in FIG. 19B, the first protective film 81 and the second protective film 82 are provided so as to cover the entire area of the first surface 30a and the second surface 30b of the substrate 30, respectively.

After that, as shown in (a) and (b) of Figure 19C, The first protective film 81 and the second protective film 82 which are provided over the entire area of the first surface 30a and the second surface 30b are divided at each division of the substrate 30. For example, as shown in FIGS. 19C(a) and (b), the protective films 81 and 82 are divided into two rows on the paper surface by placing the first surface 30a of the substrate 30 in the upper and lower directions of the paper. In the left and right direction, each of the six divisions obtained by dividing into three columns is divided. Thereby, the gap 81a and the gap 82a along the boundary of each division are formed in the 1st protective film 81 and the 2nd protective film 82. The size of each division corresponds to the size of each unit base material 22 obtained by cutting the base material 30. Further, in the invention of the present invention, the division of the base material 30 before being cut is expressed as "unit base material 22".

Moreover, as shown in (a) and (b) of FIG. 19C, in general, At a position corresponding to the through hole 25 of the base material 22, a hole 81b is formed in the first protective film 81, and a hole 82b is formed in the second protective film 82.

Clearances 81a, 82a are formed on the protective films 81, 82, and The method of the specificity of the holes 81b and 82b is not particularly limited, and various methods can be employed. For example, a mold having a shape corresponding to the shape of the first protective film 81 shown in FIG. 19C(b) may be used to form an unnecessary portion of the first protective film 81 (to be a gap and a part of the hole). ) removed. On the second side 30b side, the same can be used by A mold having a shape corresponding to the mold for the second protective film 82 is provided, and unnecessary portions (parts of the gap and the holes) of the second protective film 82 are removed. In addition to this, unnecessary portions of the first protective film 81 and the second protective film 82 may be removed by laser processing.

Thereafter, as shown in Figure 19D(a), the implementation proceeds along A substrate processing process in which the substrate 30 is cut and the through holes 25 are formed in the substrate 30 (unit substrate 22) is provided in the gaps 81a and 82a of the protective films 81 and 82 provided in the respective regions of the substrate 30. Specifically, the first protective film 81 and the second protective film 82 are used as a resist layer from the first surface 30a side and the second surface 30b side of the substrate 30, and the substrate 30 is wet-etched. The etching process is performed to cut the substrate 30 and form a through hole 25. As the etching liquid, hydrofluoric acid or the like is used as described above. As a result, as shown in FIG. 19D (a), the unit base material 22 including the glass and having the through holes 25 and the first surface 22a provided on the unit surface 22 can be obtained. The protective film 81 and the unit laminated body 35 of the second protective film 82 provided on the second surface 22b of the unit substrate 22.

Figure 19D(b) is for the illustration shown in Figure 19D(a) A cross-sectional view showing an enlarged view of the side surface 22c of the unit substrate 22 of the unit laminate 35 is shown. As in the case of the first embodiment described above, it is possible to obtain the first side face 22d that extends toward the outside as it approaches the second face 22b side, and intersects with the end portion 22be while intersecting the end portion 22ae. The second side surface 22e that extends toward the outside as it approaches the first surface 22a side.

Figure 19D(c) is for the illustration shown in Figure 19D(a) A cross-sectional view of the unit substrate 22 of the unit laminate 35 in the vicinity of the through hole 25 is shown enlarged. As shown in FIG. 19D(c), the wall surface 81d of the hole 81b of the first protective film 81 is positioned closer to the through hole 25 of the unit substrate 22 than the wall surface 25c of the through hole 25 of the unit substrate 22. At the center side. Similarly, the wall surface 82d of the hole 82b of the second protective film 82 is positioned closer to the center side of the through hole 25 of the unit base member 22 than the wall surface 25c of the through hole 25 of the unit base member 22. The relationship between the through hole 25 of the unit base member 22 and the first protective film 81 and the second protective film 82 is the same as that of the side surface 22c described above, from the first surface of the unit substrate 22. The both of 22a and the second surface 22b are etched to form a through hole 25 in the unit base material 22, which is achieved.

(Formation of the reinforcing part for the side)

Then, in the same manner as in the case of the first embodiment described above, the coating liquid 27 may be filled in a space surrounded by the side surface 22c of the unit base member 22, the first protective film 81, and the second protective film 82. Thereby, the side surface reinforcing portion 26 can be provided on the side surface 22c of the unit base member 22 of the unit laminated body 35.

(Formation of the reinforcement for the hole)

Next, a description will be given of a project for providing the hole reinforcing portion 28 on the wall surface 25c of the through hole 25 of the unit base member 22 of the unit laminated body 35 with reference to FIGS. 20A to 20D.

First, as shown in Figure 20A, in the second protection The film 82 is disposed on the second surface 22b side of the unit base member 22, and the sealing member 85 that seals the through hole 25 of the unit base member 22 and the hole 82b of the second protective film 82 from below. The material constituting the sealing member 85 is not particularly limited as long as it can prevent the leakage of the coating liquid 27. For example, the sealing member 85 can be formed using a resin film or the like.

Next, as shown in Figure 20B, the implementation will include The coating liquid 27 of the resin material is applied to the hole on the wall surface 25c of the through-hole 25 of the unit substrate 22 for coating work. Here, as in the case of the first embodiment described above, an example in which the coating liquid 27 containing an acrylic resin and a photopolymerization initiator is used will be described.

In the coating process for holes, the coating liquid 27 is coated In the sealed space. In the present embodiment, the coating liquid 27 is applied to the space surrounded by the sealing member 85, the second protective film 82, the wall surface 25c of the through hole 25, and the first protective film 81. Preferably, the coating liquid 27 is applied to the sealed space until the coating liquid 27 is at least partially in contact with the bottom surface 81e (surface on the unit base material 22 side) of the first protective film 81. Further, although not shown, the coating liquid 27 may be applied until it overflows on the first protective film 81. In this case, the coating liquid 27 overflowing the first protective film 81 can be scraped off using a doctor blade or the like, and the upper surface of the hole reinforcing portion 28 formed later can be planarly arranged.

Thereafter, the through holes provided in the unit substrate 22 are implemented. The hole in which the coating liquid 27 on the wall surface 25c of 25 is hardened is hardened. to Thus, the coating liquid 27 is cured by irradiating the coating liquid 27 with light such as ultraviolet rays. As a result, as shown in FIG. 20B, the hole reinforcing portion 28 formed of the resin material contained in the coating liquid 27 is formed so as to close the through hole 25 of the unit base member 22. .

Next, as shown in FIG. 20C, generally, for the hole The reinforcing portion 28 performs processing for forming a resin material in the through hole 23 at the hole reinforcing portion 28. As long as the through hole 23 can be formed in the hole reinforcing portion 28, the method of processing the hole reinforcing portion 28 is not particularly limited. For example, machining using a drill or laser processing can be suitably employed. Further, the sealing member 85 may be removed before the through hole 23 is formed in the hole reinforcing portion 28, or may be removed after the through hole 23 is formed in the hole reinforcing portion 28.

In addition, in FIG. 20C, although it is directed to the first protection An example in which the hole reinforcing portion 28 is processed to leave the hole reinforcing portion 28 on the wall surface 81d of the film 81 and the wall surface 82d of the second protective film 82 is not limited thereto. For example, as shown in FIG. 20D, the hole reinforcing portion 28 may not remain on the wall surface 81d of the first protective film 81 and the wall surface 82d of the second protective film 82, and the hole may be reinforced. The part 28 performs processing.

Thereafter, the first surface 22a of the unit substrate 22 is the first The protective film 81 and the second protective film 82 on the second surface 22b of the unit substrate 22 are removed. As a result, as shown in FIG. 18, it is possible to obtain a hole reinforcing portion provided on the wall surface 25c of the through hole 25 of the unit base member 22. 28 covers glass 20.

According to this embodiment, it is in the unit substrate 22 A hole reinforcing portion 28 made of a curable resin is provided on the wall surface 25c of the through hole 25. Therefore, when the impact is applied to the cover glass 20, the force transmitted to the through hole 25 of the unit base material 22 is relieved by the hole reinforcing portion 28, and can be applied to the wall surface 25c of the through hole 25. The situation in which damage such as chipping occurs is suppressed. As a result, even when a compressive stress layer is not formed on the wall surface 25c of the through hole 25 of the unit base member 22, the impact resistance of the cover glass 20 can be sufficiently improved. Further, even when the tensile stress layer 24b is exposed at the wall surface 25c of the through hole 25 of the unit base member 22, the exposed tensile stress layer 24b can be used for the exposed tensile stress layer 24b. Covering, therefore, the impact resistance of the cover glass 20 can be sufficiently improved.

Further, in the present embodiment, the reinforcing portion for the hole is formed. The coating liquid 27 of 28 is oriented from the bottom surface 81e of the first protective film 81 protruding from the first surface 22a of the unit substrate 22 toward the center side of the through hole 25, and from the second surface 22b of the unit substrate 22. The bottom surface 82e of the second protective film 82 protruding from the center side of the through hole 25 is applied in such a manner as to be in contact with each other. In this case, the positions of the faces 28a and 28b of the hole reinforcing portion 28 are determined in accordance with the positions of the bottom faces 81e and 82e of the protective films 81 and 82 that are in contact with the first faces 22a and 22b. Therefore, as shown in FIG. 20C and FIG. 20D, there is a complete or almost no step difference between the first surface 22a of the unit base member 22 and the first surface 28a of the hole reinforcing portion 28. Similarly, the second surface 22b of the unit substrate 22 and the hole are filled. Between the second faces 28b of the strong portions 28, there is a complete or almost no step difference. Therefore, it is possible to suppress the boundary between the unit base material 22 and the hole reinforcing portion 28 from being visually recognized by the observer. Therefore, according to the hole reinforcing portion 28 of the present embodiment, the strength of the through hole 23 covering the glass 20 can be simultaneously ensured and the design of the cover glass 20 can be ensured. Moreover, when the outer conductor such as a finger is slid on the cover glass 20, the feeling that the outer conductor is hooked by the boundary between the unit base material 22 and the hole reinforcing portion 28 can be suppressed. Therefore, it is possible to suppress the situation in which the operational feeling of the touch panel is hindered due to the step difference. Further, it is possible to suppress the situation in which the outer conductor of the finger or the like is injured due to the step.

Further, in the present embodiment, the coating liquid 27 is applied to When the wall surface 25c of the through hole 25 of the unit base material 22 is placed, the through hole 25 of the unit base material 22 and the hole 82b of the second protective film 82 are disposed on the second surface 22b side of the unit base material 22 from below. A sealed sealing member 85. Therefore, leakage of the coating liquid 27 can be prevented.

Moreover, in the present embodiment, the through hole of the cover glass 20 is covered. In the hole reinforcing portion 28 which is formed of a resin material which is closed by the through hole 25 of the unit base material 22, machining using a drill or the like or laser processing is applied. Get the winner. In this case, the accuracy of the shape of the through hole 23 is determined in accordance with the accuracy of the processing of the hole reinforcing portion 28. Further, it is easier to process the reinforced portion 28 made of a resin material than the tempered glass. Therefore, according to the present embodiment, it is possible to The shape of the through hole 23 covering the glass 20 is determined with good precision. In other words, the through hole 23 having a desired shape can be easily obtained as compared with the case where the wall surface 23c of the through hole 23 is formed of tempered glass.

Moreover, according to the embodiment, by performing the above In the etching process, the cutting of the substrate 30 and the formation of the through holes 25 can be simultaneously performed. By applying the coating liquid 27 and curing the coating liquid 27 by the same protective films 81 and 82, both the side reinforcing portion 26 and the hole reinforcing portion 28 can be formed with good efficiency. Therefore, the cover glass 20 which can properly protect both the side surface 20c and the through-hole 23 can be manufactured with few engineering numbers.

Further, it can be applied to the second embodiment described above. Various changes. Hereinafter, a plurality of modifications will be described with reference to the drawings. In the following description and the drawings used in the following description, the portions that can be configured in the same manner as in the second embodiment described above are used in the portions corresponding to the second embodiment described above. The same component symbols are used, and the repeated description is omitted. Further, in the case where the effects obtained in the second embodiment described above are apparently obtained in the modified example, the description is omitted.

(First Modification)

In the second embodiment described above, an example in which the hole 82b is formed in the second protective film 82 is shown. However, it is not limited thereto, and as shown in FIG. 21A, it is also possible to use the first protective film. The first protective film 81 and the second protective film 82 are provided in such a manner that the hole 81b is formed at 81, but the hole is not formed in the second protective film 82. Further, although not shown, in the example shown in FIG. 21A, the above-described gap 82a is formed in the second protective film 82 between the respective regions on the substrate 30.

For the first protective film 81 and the first shown in FIG. 21A The case where the protective film 82 is used as a resist layer and the substrate 30 is wet-etched will be described. In this case, as shown in FIG. 21B, in the place where the through hole 25 is formed, the unit base member 22 is wet-etched from the first surface 22a side with the first protective film 81 as a resist layer. . Therefore, as shown in FIG. 21B, the wall surface 25c of the through-hole 25 of the unit base material 22 intersects the first surface 22a of the unit base material 22, and is closer to the second surface 22b side of the unit base material 22. On the other hand, it extends toward the center side of the through hole 25, and then intersects the second surface 22b. Further, the through hole 25 is sealed on the second surface 22b side of the unit base member 22 by the second protective film 82.

Next, referring to FIG. 22A to FIG. 22C, The construction of the hole reinforcing portion 28 is provided on the wall surface 25c of the through hole 25 of the unit base member 22 of the unit laminated body 35 shown in FIG. 21B. First, as shown in Fig. 22A, a coating process for applying a coating liquid 27 to a hole in a sealed space is carried out. In the present embodiment, the coating liquid 27 is applied to the space surrounded by the second protective film 82, the wall surface 25c of the through hole 25, and the first protective film 81.

After that, as in the case of the second embodiment described above, A hole hardener for hardening the coating liquid 27 to obtain the hole reinforcing portion 28 Cheng. Then, as shown in FIG. 22B, the resin material processing work for forming the through hole 23 in the hole reinforcing portion 28 by performing the machining or the laser processing using the drill or the like for the hole reinforcing portion 28 is performed. . Next, the first protective film 81 on the first surface 22a of the unit substrate 22 and the second protective film 82 on the second surface 22b of the unit substrate 22 are removed. As a result, as shown in FIG. 22C, the cover glass 20 in which the hole reinforcing portion 28 is provided on the wall surface 25c of the through hole 25 of the unit base member 22 can be obtained.

According to the present modification, it is disposed on the unit substrate 22 The second protective film 82 on the second surface 22b can function to prevent the leakage of the coating liquid 27, that is, the function of the sealing member 85 in the second embodiment described above. Therefore, compared with the case of the second embodiment described above, the process of providing the sealing member 85 and the process of removing the sealing member 85 can be reduced. Therefore, the cover glass 20 in which the hole reinforcing portion 28 is provided on the wall surface 25c of the through hole 25 of the unit base member 22 can be obtained by a small number of projects.

In addition, according to the present modification, the wall surface 25c of the through hole 25 of the unit base material 22 is provided so as to face the through hole 25 as it approaches the second surface 22b side from the first surface 22a side of the unit base material 22. The shape of the center side is extended. The shape of the wall surface 25c is a hole reinforcing portion 28 that is cut by one of the end portion 28ae on the first surface 28a side or the end portion 28be on the second surface 28b side in the sixth modification to be described later. Words are highly suitable.

In addition, in the present modification, it is directed to the first protection. An example in which the hole 81b is formed in the film 81 but the hole is not formed in the second protective film 82 is shown, but it is not limited thereto. Though not shown, the first protective film 81 and the second protective film 82 can be provided so that holes are formed in the second protective film 82 but holes are not formed in the first protective film 81. In this case, the wall surface 25c of the through hole 25 of the unit base material 22 is provided so as to be close to the first surface 22a side from the second surface 22b side of the unit base material 22 as shown in FIG. 29 which will be described later. The shape is extended toward the center side of the through hole 25.

(Second modification)

In the second embodiment, the through hole 25 is formed by wet etching the base material 30 or the unit base material 22 by using the first protective film 81 or the protective films 81 and 82 as a resist layer. Made a show. However, the method for forming the through holes 25 in the substrate 30 or the unit substrate 22 is not limited to wet etching. For example, the through hole 25 may be formed in the base material 30 or the unit base material 22 by mechanical processing using a drill or the like or laser processing. 23A is a cross-sectional view showing a unit substrate 22 in which through holes 25 are formed by machining or laser processing without using the first protective film 81 or the protective films 81 and 82.

In addition, when formed by machining or laser processing, etc. In the case of the through hole 25, there is a case where micro-cracking occurs around the through hole 25. In this case, after the through holes 25 are formed, the periphery of the through holes 25 may be wet-etched and the micro-cracks removed.

In the present modification, the formation is performed at the unit base material 22 After the through hole 25, as shown in FIG. 23B, a sealing member 85 for sealing the through hole 25 of the unit base member 22 is provided on the second surface 22b of the unit base member 22. Thereafter, as shown in Fig. 24A, a coating process for applying a coating liquid 27 to a hole in a sealed space is carried out.

At this time, as shown in FIG. 24A, the coating liquid 27, It is also possible to apply the coating to the extent that it overflows on the first surface 22a of the unit substrate 22. In this case, it is not necessary to perform a process of scraping off the coating liquid 27 using a doctor blade or the like, or a process of washing the first surface 22a contaminated with the coating liquid 27, or the like. Preferably, the coating liquid 27 is applied so as to cover at least the tensile stress layer 24b exposed at the wall surface 25c of the through hole 25. By this, the tensile stress layer 24b exposed at the wall surface 25c can be covered by the hole reinforcing portion 28, whereby the through hole 25 can be more reliably protected. More preferably, as shown in Fig. 24A, the surface tension of the coating liquid 27 is applied so that the surfaces of the first surface 22a of the unit substrate 22 and the surface of the coating liquid 27 are connected to each other without a step. The coating liquid 27 is applied in a manner. By this, it is possible to suppress the occurrence of a step difference between the first surface 28a of the hole reinforcing portion 28 obtained by the coating liquid 27 and the first surface 22a of the unit base member 22.

Alternatively, although not shown, the coating liquid 27 can be applied to such an extent that it overflows on the first surface 22a of the unit base member 22. In this case, the coating liquid 27 overflowing on the first surface 22a of the unit substrate 22 is scraped off using a doctor blade or the like. Thereby, the position of the surface of the coating liquid 27 and the position of the first surface 22a of the unit substrate 22 can be made. Consistent with each other.

Thereafter, the coating liquid 27 is hardened and the pores are reinforced. The hole of the portion 28 is hardened. Next, a resin material processing process in which the hole reinforcing portion 28 is processed and the through hole 23 is formed in the hole reinforcing portion 28 is performed. As a result, as shown in FIG. 24B, the cover glass 20 in which the hole reinforcing portion 28 is provided on the wall surface 25c of the through hole 25 of the unit base member 22 can be obtained.

(Third Modification)

In the second modification described above, the through holes 25 are formed in the unit base material 22 or the base material 30 by machining or laser processing, and the first protective film 81 or the protective films 81 and 82 are not used. An example in which the coating liquid 27 is applied to the wall surface 25c of the through hole 25 is shown. However, it is also possible to form the through hole 25 in the unit base material 22 or the base material 30 by machining or laser processing, and to use the same as in the case of the above-described embodiment or the first modification. The coating liquid 27 is applied to the first protective film 81 or the protective films 81 and 82 to form a hole reinforcing portion 28.

For example, first, the system is prepared by machining or laser addition. The unit base material 22 of the through hole 25 is formed, and then, as shown in FIG. 25A, the first protective film 81 and the first surface are respectively provided on the first surface 22a of the unit base material 22 and the second surface 22b. 2 protective film 82. At this time, a hole 81b is formed at a position corresponding to the through hole 25 in the first protective film 81. Further, the wall surface of the hole 81b of the first protective film 81 81d is located closer to the center side of the through hole 25 of the unit base member 22 than the wall surface 25c of the through hole 25 of the unit base member 22. In this case, it is preferable that the coating liquid 27 is applied to the sealed space until the coating liquid 27 becomes at least partially and the bottom surface 81e of the first protective film 81, as shown in Fig. 25B. Until then. As a result, as shown in FIG. 25C, it is possible to form a step having no step difference or almost no step difference between the first surface 22a and the second surface 22b of the unit substrate 22. The reinforcing portion 28 for the holes of the first surface 28a and the second surface 28b.

(Fourth Modification)

In the second embodiment and the modifications described above, an example in which the tensile stress layer 24b is exposed at the wall surface 25c of the through hole 25 of the unit base member 22 is shown. However, it is not limited thereto, and as shown in Fig. 26, the wall surface 25c of the through-hole 25 of the unit base material 22 may be constituted by the compressive stress layer 24a. Even in this case, in order to relieve the force transmitted to the through hole 25 of the unit base member 22 when an impact is applied to the cover glass 20, the second embodiment and each of the above-described modifications are also provided. In the same manner as the example, it is effective to provide the hole reinforcing portion 28 on the wall surface 25c of the through hole 25 of the unit base member 22.

(Fifth Modification)

In the second embodiment described above, it is directed to the unit substrate 22 The wall surface 25c of the through hole 25 is shown as an example of a convex shape that protrudes toward the center side of the through hole 25 of the unit base material 22. However, the wall surface 25c of the through hole 25 may have a concave shape that is recessed toward the side opposite to the center of the through hole 25, as shown in FIG. In the same manner as in the case of the second embodiment described above, the hole reinforcing portion 28 is formed in the wall surface 25c of the through hole 25, and the through hole 25 can be appropriately protected.

(Sixth Modification)

In the second embodiment and the modifications described above, the hole reinforcing portion 28 can be obtained by curing the coating liquid 27, and then the side surface 28c of the hole reinforcing portion 28 can be processed. The shape of the side surface 28c of the hole reinforcing portion 28, that is, the shape of the wall surface 23c of the through hole 23 covering the glass 20 is arranged. Thereby, the aesthetics of the through hole 23 can be further improved. Here, since the hole reinforcing portion 28 is generally made of a resin material as described above, the wall surface 23c of the through hole 23 covering the glass 20 is formed of tempered glass, and the cover glass is used. It becomes easier to process the wall surface 23c of the through hole 23 of 20 and obtain a desired shape. Further, it is also difficult to cause a decrease in strength or a microcracking due to processing as a processing method, and for example, a processing using a grinder can be employed.

For example, as shown in FIG. 28, it is also possible to use holes. The end portion 28ae on the first surface 28a side of the reinforcing portion 28 and the end portion 28be on the second surface 28b side are cut away, and the reinforcing portion 28 for the hole is used. The side surface 28c is processed. In the example shown in Fig. 28, both the portion of the side surface 28c of the hole reinforcing portion 28 that intersects the first surface 28a and the portion that intersects the second surface 28b are processed into rounded surfaces. In addition, although FIG. 28 shows an example in which the side surface 28c is processed so that the side surface 28c becomes a rounded surface, it is not limited to this, but it is not shown, but it is not shown in figure. It is also possible to process the side surface 28c so that the side surface 28c becomes an angular surface.

In addition to this, as shown in FIG. 29, it is also possible to One of the end portion 28ae on the first surface 28a side and the end portion 28be on the second surface 28b side of the hole reinforcing portion 28, for example, at least the end portion 28be on the second surface 28b side is cut away. Processing is performed by the side surface 28c of the reinforcing portion 28. In the example shown in Fig. 29, the portion of the side surface 28c of the hole reinforcing portion 28 that intersects the second surface 28b is processed into a rounded surface. Further, the side reinforcing portion 26 provided on the side surface 22c of the unit base member 22 may be subjected to the same fillet surface processing. In this case, it is possible to impart an impression that the second surface 20b side of the cover glass 20 has a rounded shape as if it covers a wide area.

(Seventh Modification)

In the second embodiment and the modifications described above, the second protective film 82 provided on the second surface 22b of the unit base member 22 or the space sealed by the sealing member 85 is applied. An example of the coating liquid 27 is shown. However, when a coating liquid 27 having a high viscosity is used, it may be coated without forming such a sealed space. The cloth liquid 27 is applied onto the wall surface 25c of the through hole 25 of the unit base material 22. For example, as shown in FIG. 30, the unit laminate 35 may be held in a state in which the through hole 25 is extended in the vertical direction, and the wall surface 25c of the through hole 25 and the first protection may be used. The coating liquid 27 is applied to the space surrounded by the film 81 and the second protective film 82. Alternatively, as shown in FIG. 31, the coating liquid 27 may be applied to the wall surface 25c of the through hole 25 without providing the first protective film 81 and the second protective film 82. In the same manner, in the case where the coating liquid 27 is sufficiently viscous, the coating liquid 27 stays on the wall surface 25c of the through hole 25, so that a hole can be formed in the wall surface 25c. The reinforcing portion 28 is used.

Moreover, according to the present modification, it is possible to The coating liquid 27 is applied to the wall surface 25c so that the through hole 25 of the base material 22 is closed. Therefore, the hole reinforcing portion 28 in which the through hole 23 is formed can be obtained without performing the resin material processing described above.

The viscosity of the coating liquid 27 used in the present modification is The coating liquid 27 is allowed to stay on the wall surface 25c until the coating liquid 27 is hardened. For example, the viscosity of the coating liquid 27 is 20 to 50 Pa. Within the scope of s.

(eighth modification)

In the present modification, an example in which the cover glass 20 is configured to function as a touch panel in addition to the function of protecting the display device 15 will be described. Specifically, the display device covering the glass 20 The first surface 20a on the 15 side is provided with a touch panel sensing unit 40, which is useful for detecting an external conductor, as in the case of the first embodiment described above. Sensing electrodes that are close to or in contact. Further, at the inactive area Aa2 of the first surface 20a of the cover glass 20, a decorative portion 60 useful for presenting a desired color may be further provided. FIG. 32 is a view showing the touch panel sensing portion 40 provided on the first surface 20a of the cover glass 20. In addition, in FIG. 32, the decoration part 60 is abbreviate|omitted for convenience of description.

Hereinafter, referring to FIG. 32, for being disposed on the cover glass 20 The touch panel sensing unit 40 at the first surface 20a will be described. Fig. 32 is a plan view showing a case where the cover glass 20 is observed from the side of the first surface 20a. In addition, in FIG. 32, the decoration part 60 is abbreviate|omitted for convenience of description. Since the configuration of the touch panel sensing unit 40 is the same as that of the touch panel sensing unit 40 in the first embodiment described above, detailed description thereof will be omitted.

Next, referring to FIG. 33 and FIG. 34, The decorative portion 60 at the first surface 20a of the cover glass 20 will be described. 33 and 34 are cross-sectional views along line XXXIII and line XXXIV of the cover glass 20 shown in Fig. 32, respectively.

As shown in Figure 33 and Figure 34, in the inactive area In the field Aa2, the decorative portion 60 is disposed such that the position is closer to the observer than the lead-out wiring 43. In this case, the decorative portion 60 is visually recognized from the observer side via the cover glass 20. That is, in the display device 10 with the cover glass, the inactive area The appearance of the field Aa2 is determined by the components of the decorative portion 60 and its surroundings.

The color of the decorative portion 60 is the same as the first embodiment described above. The same is true, and is selected in response to the design sense required for the display device 10 with a cover glass. Further, as shown in FIG. 34, generally, a hole 61 is formed at a position overlapping the through hole 23 in the decorative portion 60.

In addition, in FIG. 34, the decorative part 60 is directed to When the observation is performed along the normal direction of the cover glass 20, the example in which the side reinforcing portion 26 and the hole reinforcing portion 28 are overlapped with each other is shown. However, the present invention is not limited thereto. . For example, as shown in FIG. 35, the decorative portion 60 can also be overlapped with the side reinforcing portion 26 and the hole reinforcing portion 28 when viewed along the normal direction of the cover glass 20. The way is set. Further, although not shown, the side reinforcing portion 26 and the hole reinforcing portion 28 may be partially formed only with the decorative portion 60 when viewed along the normal direction of the cover glass 20. The overlap.

In the present modification, the manufacturing process of the cover glass 20 In the middle, the element portion forming part of the element portion 70 such as the decorative portion 60 and the touch panel sensing portion 40 is formed. The timing of the implementation of the component portion forming process is not particularly limited, and various forms can be considered.

For example, it is also possible to perform the above-described protective film forming process in which the first protective film 81 and the second protective film 82 are provided on the substrate 30, and the element portion forming process is performed first. In this case, the first protective film 81 is etched. In the engraving process, not only the function of protecting the first surface 30a of the substrate 30 but also the function of protecting the element portion 70 provided on the first surface 30a of the substrate 30 is exhibited.

Alternatively, the first protective film 81 and the second protective film 82 may be used as a resist layer, and the base material 22 may be obtained by wet etching the base material 30, and then the first surface of the unit base material 22 may be applied. The element portion forming process of the element portion 70 is provided on the 22a. In this case, the coating liquid 27 may be applied to form the side surface reinforcing portion 26 and the hole reinforcing portion 28, and may be performed before the element portion forming process, or after the element portion forming process. Implementation.

Preferably, the side reinforcing portion 26 and the hole reinforcing portion 28, It is configured to present the same color as the decorative portion 60. For example, the side reinforcing portion 26 and the hole reinforcing portion 28 may include a coloring pigment of the same color as the coloring pigment contained in the decorative portion 60. In this case, the region between the side reinforcing portion 26 and the hole reinforcing portion 28 that does not overlap the decorative portion 60 when viewed from the normal direction of the cover glass 20 is the same color as the decorative portion 60. The area is visually recognized. Therefore, it is possible to expand the area where the design effect can be produced.

In general, the decorative portion 60 is formed by applying a coating liquid containing a resin material and a pigment onto the unit base material 22. On the other hand, it is not easy to apply the coating liquid correctly in the vicinity of the side surface 22c of the unit base member 22 and the wall surface 25c of the through hole 25.

Here, the side reinforcing portion 26 and the hole reinforcing portion 28 are as above. In the case of being generally colored, it is not necessary to provide the decorative portion 60 in the vicinity of the side surface 22c of the unit base member 22 and the wall surface 25c of the through hole 25, so that the side surface 22c of the unit base member 22 can be adjacent to the through hole. The area near the wall 25c of 25 produces a design effect. Therefore, it is possible to reduce the difficulty required for the construction of the decorative portion 60.

In addition, in the above-described modification, the touch surface is Both of the plate sensing portion 40 and the decorative portion 60 are shown as being included in the cover glass 20, but are not limited thereto. For example, although not shown, the cover glass 20 may include the touch panel sensing unit 40 but does not include the decorative portion 60. Alternatively, the cover glass 20 may include the decorative portion 60 but does not include the touch panel sensing portion 40.

Moreover, in the above-described modification, it is for the side surface. The color of the reinforcing portion 26 and the hole reinforcing portion 28 is the same as the color of the decorative portion 60. However, the present invention is not limited thereto, and the side reinforcing portion 26 and the hole reinforcing portion 28 are also It may be configured to present a color different from the decorative portion 60. Further, when the decorative portion 60 is not provided, the side reinforcing portion 26 and the hole reinforcing portion 28 may be configured to have a specific color. In this case, even if the decorative portion 60 is not provided, the side reinforcing portion 26 and the hole reinforcing portion 28 can be used to improve the design such as prevention of light leakage.

Further, in the above-described modification and the first embodiment described above In the state, the pattern of the sensing electrodes 41, 42 as the touch panel sensing portion 40 is shown for an example using a so-called diamond pattern, but Yes, the system is not limited to this. The sensing electrodes 41 and 42 formed of patterns of various forms can be used as long as the touch position can be detected with the desired sensitivity and resolution.

Further, in the above-described modification and the first embodiment described above In the state, the material of the sensing electrodes 41 and 42 constituting the touch panel sensing unit 40 is shown as an example in which a transparent conductive material having light transmissivity is used. However, the material is not limited thereto. . For example, as the sensing electrodes 41 and 42, a so-called mesh sensing pattern formed by disposing a non-transmissive conductive material such as a silver alloy or copper into a mesh-like metal thin wire may be used.

(Ninth Modification)

In the second embodiment and the modified examples described above, the through hole 25 of the unit base member 22 is sealed by the second protective film 82 or the sealing member 85 on the side of the second surface 22b. Next, an example in which the coating liquid 27 is applied in a sealed space is shown. However, the coating liquid 27 is allowed to stay on the wall surface 25c of the through hole 25 until the coating liquid 27 is hardened, so that the through hole 25 does not need to be on the second surface 22b side. Firmly sealed. For example, the coating liquid 27m applied from the side of the first surface 22a may leak from the second surface 22b side through the through hole 25. In addition, when the second surface 22b of the unit base material 22 is contaminated by the coating liquid 27, the second surface 22b may be washed after the hole reinforcing portion 28 is formed. If it is considered to prevent the second surface 22b from being contaminated, Preferably, the through hole 25 is firmly sealed on the side of the second surface 22b.

(10th modification)

In the second embodiment and the modified examples described above, the first protective film 81 and the second protective film are further processed after the resin material processing process in which the hole reinforcing portion 28 is processed and the through hole 23 is formed. An example of 82 removal is shown. However, the first protective film 81 and the second protective film 82 may be removed before the resin material processing work is performed. In addition, when the first surface 22a and the second surface 22b of the protective unit base material 22 are protected from contamination by shavings or the like which are generated when the hole reinforcing portion 28 is processed and the through hole 23 is formed, It can be said that it is preferable to remove the first protective film 81 and the second protective film 82 after performing the resin material processing work.

(11th modification)

In each of the above-described embodiments and modifications, the side reinforcing portion 26 and the hole reinforcing portion 28 may be configured to be capable of suppressing charging of the cover glass 20. For example, the side reinforcing portion 26 and the hole reinforcing portion 28 may contain conductive particles. By this, it is possible to suppress the charging of the side reinforcing portion 26, the hole reinforcing portion 28, and the unit base member 22, whereby the occurrence of electrostatic breakdown can be suppressed. The conductive particles to be added to the side reinforcing portion 26 and the hole reinforcing portion 28 include, for example, particles made of carbon black. The conductive particles are preferably added so that the surface resistance of the side reinforcing portion 26 and the hole reinforcing portion 28 is in the range of 10 ⁵ to 10 ⁸ Ω/□.

(12th modification)

In each of the above-described embodiments and the modifications, in order to reduce the amount of shrinkage during curing of the coating liquid 27, a filler may be added to the resin material contained in the coating liquid 27. Since the degree of shrinkage due to heat is small compared to the resin material, the filler can be used to cure the coating liquid 27 to become the side reinforcing portion 26 or the hole reinforcing portion 28. The degree of contraction of the whole nature becomes smaller. Examples of the filler include particles of carbon black and the like. In addition, when the filler is added, it is presumed that the light is blocked by the filler, and the polymerization reaction of the photocurable resin is inhibited, and the hardening cannot be sufficiently performed. In consideration of such a problem, a thermosetting resin may be further added to the resin material contained in the coating liquid 27.

(13th modification)

In each of the above-described embodiments and the modifications, the protective film 81 and 82 are formed by attaching a sheet of biaxially stretched polypropylene or non-stretched polypropylene to the substrate 30 via an adhesive layer. Made a show. However, the method of forming the protective films 81 and 82 is not particularly limited. For example, a photosensitive photoresist film may be bonded to the first surface 30a of the substrate 30 and the second surface 30b, respectively, and then a photosensitive mask or the like may be used for the photosensitive photoresist film to meet expectations. The shape is irradiated with ultraviolet rays, etc. The light is patterned by an imaging solution such as an acidic liquid or an alkaline liquid or an organic solvent, and protective films 81 and 82 are provided on the substrate 30.

In addition, it is numerical for each of the above embodiments. Modifications have been made, but of course, a plurality of modifications may be suitably combined and applied.

[Examples]

The present invention will be further described in detail with reference to the accompanying drawings, but the invention is not limited by the description of the embodiments below.

(Example 1)

The reinforcing portion 26 is formed on the side surface 22c of the unit base member 22 by the method shown in Figs. 7A to 7D described above. As the material constituting the reinforcing portion 26, three types of acrylic resin, epoxy resin, and polyene-polythiol resin are used. As the acrylic resin, UV-3300 manufactured by Toagosei Co., Ltd. was used. As the epoxy resin, TB3114 manufactured by THREEBOND Co., Ltd. was used. Further, as the polyene-polythiol-based resin, PHOTOLEC A-784 manufactured by Sekisui Chemical Co., Ltd. was used.

First, three unit substrates 22 provided with the first protective film 81 and the second protective film 82 are prepared. As the unit base material 22, a compressive stress layer having a thickness of 24 μm was applied by chemical strengthening on the surface of the aluminosilicate glass having a thickness of 0.7 mm. Then, like on As shown in FIG. 7A, generally, a coating liquid 27 containing one of the above three types of resins is applied to the side surface 22c of the unit substrate 22. Thereafter, the coating liquid 27 is irradiated with light to cure the coating liquid 27, whereby the reinforcing portion 26 is obtained. In addition, as the viscosity of the coating liquid 27 and the conditions for curing the coating liquid 27, conditions recommended by a material manufacturer that supplies the resin material contained in the coating liquid 27 are employed.

Touching the side surface 26c of the obtained reinforcing portion 26 with a hand, And commented on whether you feel that you will stick to it. As a result, the reinforcing portion 26 composed of the epoxy resin and the polyolefin-polythiol resin did not feel sticky. On the other hand, the reinforcing portion 26 made of an acrylic resin feels sticky.

The side surface 26c of the reinforcing portion 26 is configured to be phased when hardened A part that is exposed to the external environment such as the atmosphere. Therefore, when an acrylic resin is used, it is presumed that the polymerization reaction is inhibited by oxygen, and as a result, the side surface 26c of the reinforcing portion 26 remains in a state in which it has not been cured. On the other hand, the degree of inhibition by oxygen in the polymerization reaction of the polyolefin-polythiol-based resin is smaller than that in the case of the acrylic resin. Therefore, it is presumed that the reinforcing portion 26 composed of the polyolefin-polythiol resin can prevent the side surface 26c from being sticky.

(Example 2)

Using Example 1, the printing suitability of the above three types of resins was evaluated. Specifically, first, as shown in Figure 36 (a) In general, a glass plate 90 is prepared. Next, as shown in FIG. 36(b), a coating liquid containing one of the above three types of resins is applied onto the glass plate 90, and then the coating liquid is hardened, and thereby the glass is thereby A resin layer 91 is formed on the board 90. Next, as shown in Fig. 36 (c), a plurality of kinds of inks which are set to have different surface tensions are printed on the resin layer 91, thereby being on the resin layer. Print patterns 92a to 92f are provided on 91. Here, the printed patterns 92a to 92f are each formed of ink having surface tensions of 32, 34, 36, 38, 40, and 42 mN/m. As a means for printing such ink on the resin layer 91, a group of #32, 34, 36, 38, 40, 42 of "JUMBO SURFACE TENSION TEST PENS" manufactured by Corona Supplies Ltd. was used. The number after # represents the surface tension (in mN/m) of the ink contained in the pen.

After that, after waiting for 1 hour, for printing The state of the patterns 92a to 92f was observed. In Fig. 36 (d), an example of the state of the printed patterns 92a to 92f after one hour has elapsed is shown. Further, in general, if the surface tension is higher, the ink is bounced off from the substrate (in this case, the resin layer 91), and as a result, the printed pattern is likely to be disordered. In other words, in the printed patterns 92a to 92f shown in FIG. 36, the pattern on the right side, that is, the pattern on the side of the printed pattern 92f, becomes more easily peeled off from the resin layer 91 and becomes disorder. Therefore, when the printing suitability of the resin layer 91 is not sufficient, one of the printed patterns 92a to 92f may be used as the side. There is no turbulence in the pattern on the far left side, but there is a disorder in the pattern on the more right side. The example shown in Fig. 36 (d) represents that the resin layer 91 has printing suitability with respect to the print patterns 92a to 92d (pattern having a surface tension of 32 to 38 mN/m), but The printed patterns 92e and 92f (patterns having a surface tension of 40 or 42 mN/m) do not have printing suitability. By carrying out such an experiment, the printing suitability of the above three types of resins can be evaluated for inks having surface tensions of 32, 34, 36, 38, 40, and 42 mN/m, respectively.

The evaluation results of the printing suitability are shown in Table 1. in In Table 1, "○" indicates that the printing pattern formed by the ink is not generated (the ink is opened), and "X" indicates that the ink is ejected. As shown in Table 1, the resin layer 91 composed of an acrylic resin and a polyene-polythiol resin has printing suitability with respect to an ink having a surface tension of 32 to 42 mN/m. On the other hand, the resin layer 91 made of an epoxy resin has printing suitability with respect to an ink having a surface tension of 32 mN/m, but is similar to an ink having a surface tension of 34 to 42 mN/m. Does not have print suitability.

As in the above general, polyene-polythiol resin, even if it is When the surface tension of the coating liquid such as the ink applied thereto is large, it is possible to suppress the coating liquid from being bounced and causing the pattern to be disordered. When the components of the second decorative portion 62 and the like are provided on the first surface 26a of the reinforcing portion 26, it is preferable to form the reinforcing portion 26 by using a polyene-polythiol resin.

In addition, as a result of the evaluation, the ink was printed on the layer made of the epoxy resin by the screen printing method, and as a result, it was confirmed that the ink was caused to be bounced off by the epoxy resin. bad. As the ink, 1690N manufactured by SEIKO ADVANCE Co., Ltd. was used.

(Example 3)

The impact resistance of the epoxy resin and the polyolefin-polythiol resin was evaluated. Specifically, first, in the same manner as in the case of Example 1, the cover glass 20 provided with the reinforcing portion 26 composed of an epoxy resin and a polyolefin-polythiol resin was produced. Moreover, for comparison, the cover glass 20 which does not have the reinforcement part 26 was manufactured. Then, as shown As shown generally at 37, impact is applied to the side 20c of the cover glass 20 using the striking means 94. Further, when the reinforcing portion 26 is provided, the side surface 20c of the cover glass 20 is constituted by the side surface 26c of the reinforcing portion 26.

As a means of attack 94, a stainless steel length of 35 cm is used. A round bar of a specific diameter made of steel (SUS). Here, tests were carried out using SUS round bars having diameters of 0.50, 0.75, 1.00, and 1.25 cm, respectively. Hereinafter, the specific test method will be described.

First, on the mounting table 97, the cover glass 20 is placed. And the means of attack 94 supported by the means 95. The cover glass 20 is placed so that the side surface 20c faces upward. The support means 95 is configured to rotate the striking means 94 with the other end 94b as an axis and to cover the range of 90° until the one end 94a of the striking means 94 is changed from the state of being directly upward to the state of being oriented to the lateral direction. This causes the one end 94a of the striking means 94 to collide with the side surface 20c of the cover glass 20 to support the other end 94b of the striking means 94. In this case, the collision energy determined according to the length and diameter of the striking means 94 can be correctly applied to the side surface 20c of the cover glass 20. Further, around the cover glass 20, it is also possible to provide a state for holding the first surface 20a and the second surface 20b of the cover glass 20 and preventing the cover glass 20 from falling down when an impact is applied to the cover glass 20. Means 96.

On the side of the cover glass 20 using the striking means 94 After the surface 20c is applied with an impact, a 4-point bending test is performed, and for covering The bending strength of the glass 20 was measured.

The evaluation results of the impact resistance are shown in Table 2. In Table 2 In the middle, "○" indicates that the measured bending strength is 500 MPa or more, and "X" indicates that the measured bending strength is less than 500 MPa. As shown in Table 2, in general, in the cover glass 20 provided with the reinforcing portion 26 composed of a polyene-polythiol-based resin, even a hitting means 94 having a diameter of 1.00 cm is used for the cover glass 20. After the impact is applied to the side surface 20c, sufficient bending strength can be maintained. On the other hand, in the cover glass 20 provided with the reinforcing portion 26 made of an epoxy resin, after the impact is applied to the side surface 20c of the cover glass 20 by using the striking means 94 having a diameter of 1.00 cm, it is impossible to Maintain sufficient bending strength.

As in the above, the hardness of the epoxy resin is used as The hardness of the material constituting the reinforcing portion 26 of the cover glass 20 is too high and is therefore weak. Therefore, it can be inferred that when the impact means 94 is used to apply an impact to the side surface 20c of the cover glass 20, the reinforcing portion 26 is at least partially broken, and as a result, the sufficient bending of the cover glass 20 cannot be maintained. strength. In contrast, polyene-polythiol trees The hardness of the fat is within an appropriate range, and is, for example, in the range of D50 to D75 as described above. Therefore, the reinforcing portion 26 composed of the polyene-polythiol resin can absorb the impact applied from the striking means 94 by elastic deformation. Therefore, it can be inferred that the sufficient bending strength of the cover glass 20 can be maintained even after the impact is applied.

(Example 4)

The moisture resistance of the above three types of resins used in Example 1 was evaluated. Specifically, first, in the same manner as in the first embodiment, the cover glass 20 including the reinforcing portion 26 composed of the above-described three kinds of resins was produced. Next, each cover glass 20 was allowed to stand in a high-temperature, high-humidity environment at a temperature of 85 ° C and a relative humidity of 85% for 240 hours. Thereafter, whether or not there was a change in discoloration or the like in the appearance of each of the cover glass 20 was evaluated by visual observation. Further, whether or not the reinforcing portion 26 is sufficiently adhered to the side surface 22c of the unit base member 22 is used by the hand holding the reinforcing portion 26 or by the reinforcing portion 26 in the above-described fourth embodiment. The hitting means 94 used was applied to evaluate the impact. As a result, it was confirmed that the appearance of the reinforcing portion 26 and the adhesion of the reinforcing portion 26 were sufficiently maintained regardless of the cover glass 20 including the reinforcing portion 26 composed of three types of resins.

(Example 5)

The light resistance of the above three types of resins used in Example 1 was evaluated. Specifically, first, in the same manner as in the first embodiment, the cover glass 20 including the reinforcing portion 26 composed of the above-described three kinds of resins was produced. Next, each cover glass 20 was irradiated with light using SUNTEST CPS+ manufactured by Atlas Material Testing Technology. Thereafter, whether or not there was a change in discoloration or the like in the appearance of each of the cover glass 20 was evaluated by visual observation. Further, whether or not the reinforcing portion 26 is sufficiently adhered to the side surface 22c of the unit base member 22 is used by the hand holding the reinforcing portion 26 or by the reinforcing portion 26 in the above-described fourth embodiment. The hitting means 94 used was applied to evaluate the impact. As a result, it was confirmed that the appearance of the reinforcing portion 26 and the adhesion of the reinforcing portion 26 were sufficiently maintained regardless of the cover glass 20 including the reinforcing portion 26 composed of three types of resins.

20‧‧‧ Covering glass

20c‧‧‧ side

22‧‧‧unit substrate

22a‧‧‧1st

22b‧‧‧2nd

22c‧‧‧ side

22d‧‧‧1st side

22e‧‧‧2nd side

22ae‧‧‧End

22be‧‧‧ end

24a‧‧‧Compressive stress layer

24b‧‧‧ tensile stress layer

26‧‧‧Reinforcement Department

26a‧‧‧1st

26ae‧‧‧End

26b‧‧‧2nd

26be‧‧‧End

26c‧‧‧ side

60‧‧‧1st decoration department

62‧‧‧2nd Decoration Department

Claims (29)

A cover glass is a cover glass provided in a display device, and is characterized in that: a unit substrate includes a first surface, a second surface opposite to the first surface, and The side surface existing between the first surface and the second surface includes glass; and the reinforcing portion is provided on a side surface of the unit substrate, and includes a resin material, and the resin material of the reinforcing portion A polyene-polythiol-based resin containing an olefin compound and a thiol compound. The cover glass according to the first aspect of the invention, wherein the reinforcing portion is provided on a side surface which is formed outside the unit base material, and includes a side reinforcing portion including the resin material. The cover glass according to the first or second aspect of the invention, wherein the unit base material is formed with a through hole penetrating the first surface and the second surface, and the reinforcing portion is The hole is provided in the through hole of the unit substrate, and includes a reinforcing portion for a hole including the resin material. The cover glass according to the first or second aspect of the invention, wherein the surface of the reinforcing portion is at least partially provided with a decorative portion that exhibits a specific color. The cover glass according to the first or second aspect of the invention, wherein the polyene-polythiol resin of the resin material in the reinforcing portion contains 20 to 80% by weight of an olefinic compound, and 20 ~80 weight Amount of thiol compound. A cover glass is a cover glass provided in a display device, and is characterized in that the unit substrate includes a first surface and a second surface opposite to the first surface, and is A through hole penetrating the first surface and the second surface is formed and formed of glass, and a reinforcing portion for the hole is provided on a wall surface of the through hole of the unit substrate, and includes a resin material. The cover glass according to the sixth aspect of the invention, wherein the hole reinforcing portion includes a first surface extending in a lateral direction from an end portion of the first surface of the unit substrate; a second surface extending toward the side direction from the end portion of the second surface of the unit substrate; and a side surface extending between the first surface and the second surface of the hole reinforcing portion, the unit base a step between the first surface of the material and the first surface of the hole reinforcing portion is 10 μm or less, between the second surface of the unit substrate and the second surface of the hole reinforcing portion The step is 10 μm or less. The cover glass according to claim 6 or 7, wherein the unit substrate includes a compressive stress layer formed on at least the first surface and the second surface; and the position is a tensile stress layer between the compressive stress layer on the first surface side and the compressive stress layer on the second surface side. The cover glass as recited in claim 8 of the patent application, wherein The tensile stress layer is exposed on the wall surface of the through hole of the unit substrate, and the hole reinforcing portion is formed by exposing the wall surface of the through hole of the unit substrate The stress layer is formed by covering the hole with the reinforcing portion. The cover glass according to the sixth aspect or the seventh aspect of the present invention, wherein a minimum of a coating size of the hole reinforcing portion provided on the wall surface of the through hole of the unit substrate is 20 μm. the above. The cover glass according to the sixth aspect or the seventh aspect, wherein the wall surface of the through-hole of the unit substrate includes a first wall surface and the first surface of the unit substrate Intersecting and extending toward the center side of the through hole as approaching the second surface side of the unit substrate; and the second wall surface intersecting the second surface of the unit substrate, and approaching the unit The first surface side of the base material extends toward the center side of the through hole, and then merges with the first wall surface. The cover glass according to the sixth aspect of the invention, wherein the wall surface of the through-hole of the unit base material faces the first surface from the second surface side of the unit base material The surface side extends toward the center side of the through hole. The cover glass according to claim 6 or 7, wherein the first surface side of the unit substrate is provided with The decorative portion of the specific color is formed, and the reinforcing portion for the hole is configured to have the same color as the decorative portion. The cover glass according to claim 13, wherein the decorative portion overlaps the hole reinforcing portion when viewed along a normal direction of the cover glass. It is composed. The cover glass according to claim 6 or 7, wherein the hole reinforcing portion is configured to exhibit a specific color. The cover glass according to claim 6 or 7, wherein at least a part of the touch panel sensing portion is provided on the first surface side of the unit substrate. The cover glass according to the sixth aspect of the invention, wherein the resin material of the hole reinforcing portion contains a polyene-polythiol resin. The cover glass according to the seventh aspect of the invention, wherein the portion of the side surface of the hole reinforcing portion that intersects the first surface of the hole reinforcing portion or the portion that intersects the second surface At least one of them is processed into a rounded surface or a chamfered surface. A display device with a cover glass, comprising: a display device; and a cover glass disposed at the display device, wherein the cover glass is as claimed in claim 1, item 1, item 2, and item 6. The item or the cover glass described in item 7 is formed. A method for producing a cover glass, which is provided in a display device and formed with a through hole, and a method for producing the cover glass, comprising: preparing a project, preparing a unit substrate, The unit substrate includes a first surface and a second surface opposite to the first surface, and is formed with a through hole penetrating the first surface and the second surface, and contains glass; and coating engineering Applying a coating liquid containing a resin material to a wall surface of the through-hole of the unit substrate; and performing a curing process to cure the coating liquid on the wall surface of the through-hole of the unit substrate. A hole reinforcing portion is formed on the wall surface of the through hole of the base material. The method for producing a cover glass according to claim 20, wherein the unit substrate includes a compressive stress layer formed on at least the first surface and the second surface; and the position is A tensile stress layer between the compressive stress layer on the one surface side and the compressive stress layer on the second surface side. The method for producing a cover glass according to claim 21, wherein the tensile stress layer is exposed on the wall surface of the through hole of the unit substrate, and the hole reinforcing portion is used to The tensile stress layer exposed at the wall surface of the through hole of the unit substrate is formed to be covered by the hole reinforcing portion. As described in any one of the 20th to 22nd patent applications. In the coating process, the through-hole of the unit substrate is sealed on the second surface side of the unit substrate, and the coating liquid is sealed. In the sealed space, the first unit side of the unit substrate is coated. In the curing process, the hole reinforcing portion is configured to block the through hole of the unit substrate. In addition, the method for producing the cover glass further includes a resin material processing process, and a through hole is formed in the hole reinforcing portion after the hardening process. The method for producing a cover glass according to claim 23, wherein in the preparation process, the first surface of the unit substrate is provided with the through-formed portion of the unit substrate a first protective film of the hole through which the hole is connected, wherein a wall surface of the hole of the first protective film is located closer to the unit substrate than the wall surface of the through hole of the unit substrate The center side of the hole. The method for producing a cover glass according to claim 24, wherein the preparation process includes a protective film forming process in which the hole is formed on the first surface of the unit substrate. The first protective film and the etching process are performed by using the first protective film as a resist layer The through-holes are formed by wet etching on the unit substrate. The method for producing a cover glass according to claim 25, wherein in the protective film forming process, the first surface of the unit substrate is further provided on the first protective film. a second protective film having a hole formed at a position corresponding to the hole. In the etching process, the unit substrate is formed by using the first protective film and the second protective film as a resist layer. The first surface side and the second surface side are wet-etched. In the coating process, the through-holes of the unit substrate are sealed by a sealing member disposed on the second protective film. The method for producing a cover glass according to claim 25, wherein in the preparation process, the through hole of the unit substrate is provided on the second surface of the unit substrate. In the above-described etching process, the first protective film is a resist layer, and is wet-etched from the first surface side. The method for producing a cover glass according to claim 25, further comprising: forming an element portion on the first surface side of the unit substrate, forming a decorative portion or a touch At least a part of an element portion of at least one of the panel sensing portions. Manufacture of cover glass as described in item 28 of the patent application In the method, the element portion forming process is carried out before the protective film forming process.