WO2015122454A1 - Verre de protection, dispositif d'affichage comportant un verre de protection et procede de production du verre de protection - Google Patents

Verre de protection, dispositif d'affichage comportant un verre de protection et procede de production du verre de protection Download PDF

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Publication number
WO2015122454A1
WO2015122454A1 PCT/JP2015/053814 JP2015053814W WO2015122454A1 WO 2015122454 A1 WO2015122454 A1 WO 2015122454A1 JP 2015053814 W JP2015053814 W JP 2015053814W WO 2015122454 A1 WO2015122454 A1 WO 2015122454A1
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WO
WIPO (PCT)
Prior art keywords
hole
unit base
base material
cover glass
reinforcing portion
Prior art date
Application number
PCT/JP2015/053814
Other languages
English (en)
Japanese (ja)
Inventor
諭 江森
中澤　伸介
章悦 内田
敬 竹腰
Original Assignee
大日本印刷株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2014024782A external-priority patent/JP6260322B2/ja
Priority claimed from JP2014069994A external-priority patent/JP6331127B2/ja
Application filed by 大日本印刷株式会社 filed Critical 大日本印刷株式会社
Publication of WO2015122454A1 publication Critical patent/WO2015122454A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133331—Cover glasses
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Definitions

  • the present invention relates to a cover glass provided on a display device.
  • the present invention also relates to a display device provided with a cover glass.
  • the present invention also relates to a method for manufacturing a cover glass.
  • a cover glass for protecting the display surface of a display device on the viewer side of a display device such as a liquid crystal display or an organic EL display.
  • the cover glass also serves to protect the display device and a touch panel sensor provided on the viewer side of the display device. Note that a cover glass and a touch panel sensor are integrally formed.
  • Patent Document 1 proposes that a cover glass is configured using a tempered glass having a compressive stress layer on which a compressive stress is generated.
  • Patent Document 1 a cover glass having a size corresponding to the size of each display device is manufactured by dividing a large tempered glass into individual pieces. By the way, the compressive stress layer of tempered glass is formed on the glass surface by chemical treatment or heat treatment. Therefore, when a large tempered glass is divided as in Patent Document 1, a tensile stress layer in which a tensile stress is generated is exposed on the side surface of the obtained cover glass. For this reason, it is considered that a cover glass having sufficient strength on the side surface cannot be manufactured by the method described in Patent Document 1.
  • Patent Document 2 proposes that the outer peripheral surface of the cover glass including the side surface of the cover glass is bordered by a plastic film.
  • a plastic film As the edging method, an injection molding method, a dispensing method, a spray coating method, a roller coating method, and the like have been proposed.
  • the material of the plastic film include an epoxy resin or an acrylic resin.
  • the resin material constituting the plastic film is exposed to the external environment such as the atmosphere.
  • the resin material is provided in a predetermined place, usually, first, the resin material adjusted to have a predetermined fluidity is applied on the object, and then a polymerization reaction of the resin material is caused. A step of curing or solidifying the resin material is performed. Therefore, the plastic film provided on the outer peripheral surface of the cover glass is formed based on a polymerization reaction that has proceeded in an environment exposed to an external environment such as the atmosphere.
  • acrylic resins generally have high reactivity. For this reason, when a plastic film is formed using an acrylic resin, the polymerization reaction is inhibited by oxygen, and as a result, the polymerization reaction cannot sufficiently proceed, and it is considered that sufficient hardness of the plastic film cannot be obtained. .
  • the plastic film provided on the outer peripheral surface of the cover glass is required to have a sufficiently high hardness so that the cover glass can be protected from impact.
  • the hardness of the plastic film is too high, the plastic film becomes brittle, and as a result, the toughness of the plastic film decreases.
  • the epoxy resin generally has a high hardness, for example, a hardness of around D90. For this reason, it is considered that it is inappropriate to use an epoxy-based resin in the application of a cover glass to which an impact can be frequently applied.
  • D90 means that the hardness value obtained by measuring with a type D durometer is 90.
  • the first aspect of the present invention has been made in consideration of such points, and an object thereof is to provide a cover glass having a reinforcing portion made of an appropriate resin material and a display device with the cover glass. .
  • a through hole may be formed in a portion of the cover glass that overlaps the speaker or the in-camera.
  • the formation of the through hole means that the impact resistance of the cover glass is lowered around the through hole. The reduction in impact resistance becomes more remarkable when the tensile stress layer of tempered glass is exposed on the wall surface of the through hole.
  • many methods for reinforcing the side surface of the cover glass have been proposed.
  • a method for reinforcing the wall surface of the through hole has not been studied much.
  • the second aspect of the present invention has been made in consideration of such points, and an object thereof is to provide a cover glass and a display device with a cover glass in which the wall surface of the through hole of the unit base material is reinforced.
  • 1st this invention is the cover glass provided in a display apparatus, Comprising: The 1st surface, the 2nd surface on the opposite side to the said 1st surface, and the side surface extended between the said 1st surface and the said 2nd surface A unit base material made of glass, and a reinforcing part provided on a side surface of the unit base material and including a resin material, wherein the resin material of the reinforcing part includes a polyene containing an ene compound and a thiol compound.
  • the reinforcing portion may be provided on a side surface constituting the outer shape of the unit base material and may include a side reinforcing portion including the resin material.
  • the unit base material is formed with a through hole penetrating the first surface and the second surface, and the reinforcing portion is the through hole of the unit base material. You may have the hole reinforcement part provided on the top and containing the said resin material.
  • a decorative portion exhibiting a predetermined color may be provided at least partially on the surface of the reinforcing portion.
  • the polyene-polythiol resin of the resin material of the reinforcing portion may contain 20 to 80% by weight of an ene compound and 20 to 80% by weight of a thiol compound. .
  • 2nd this invention is the cover glass provided in a display apparatus, Comprising: The 1st surface and the 2nd surface on the opposite side to the said 1st surface are penetrated, The said 1st surface and the said 2nd surface are penetrated.
  • a cover glass comprising: a unit base material made of glass in which a through hole is formed; and a hole reinforcing portion that is provided on a wall surface of the through hole of the unit base material and includes a resin material.
  • the hole reinforcing portion includes a first surface extending laterally from an end portion of the first surface of the unit base material, and an end portion of the second surface of the unit base material.
  • a second surface extending laterally from the surface, and a side surface extending between the first surface and the second surface of the hole reinforcing portion, the first surface of the unit base material and the hole reinforcing portion
  • the step between the first surface and the first surface of the unit base material may be 10 ⁇ m or less, and the step between the second surface of the unit base material and the second surface of the hole reinforcing portion may be 10 ⁇ m or less.
  • the unit base material includes at least the compressive stress layer formed on the first surface and the second surface, the compressive stress layer on the first surface side, and the second surface. And a tensile stress layer positioned between the compression stress layer on the side.
  • the tensile stress layer may be exposed on the wall surface of the through hole of the unit base material.
  • the hole reinforcing portion is formed such that the tensile stress layer exposed on the wall surface of the through hole of the unit base material is covered with the hole reinforcing portion.
  • a minimum value of a covering dimension of the hole reinforcing portion provided on the wall surface of the through hole of the unit base material may be 20 ⁇ m or more.
  • the wall surface of the through hole of the unit base material intersects the first surface of the unit base material, and as it goes toward the second surface side of the unit base material.
  • the first wall surface extending to the center side of the through hole intersects the second surface of the unit base material, extends toward the center side of the through hole toward the first surface side of the unit base material, and the first And a second wall surface that merges with the one wall surface.
  • the wall surface of the through hole of the unit base member spreads toward the center side of the through hole from the second surface side of the unit base member toward the first surface side. It may be.
  • a decorating portion exhibiting a predetermined color is provided on the first surface side of the unit base material, and the hole reinforcing portion has the same color as the decorating portion. It may be configured to exhibit. Moreover, the said decoration part may be comprised so that it may overlap with the said reinforcement part for holes, when it sees along the normal line direction of the said cover glass.
  • the hole reinforcing portion may be configured to exhibit a predetermined color.
  • At least a part of the touch panel sensor unit may be provided on the first surface side of the unit base material.
  • the resin material of the hole reinforcing portion may include a polyene-polythiol resin.
  • At least one 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 is a round surface or a corner.
  • the surface may be processed.
  • the present invention is a display device with a cover glass, comprising a display device and a cover glass disposed on the display device, wherein the cover glass is made of the cover glass described above.
  • the present invention is a method for manufacturing a cover glass provided with a through-hole provided in a display device, which includes a first surface, and a second surface opposite to the first surface, and the first surface and the A step of preparing a unit base material made of glass in which a through-hole penetrating the second surface is formed; an application step of applying a coating liquid containing a resin material to the wall surface of the through-hole of the unit base material; Curing the coating liquid on the wall surface of the through hole of the unit base material, and forming a hole reinforcing portion on the wall surface of the through hole of the unit base material. is there.
  • the unit base material includes at least the compressive stress layer formed on the first surface and the second surface, the compressive stress layer on the first surface side, and the second surface. And a tensile stress layer positioned between the compression stress layer on the side.
  • the tensile stress layer may be exposed on the wall surface of the through hole of the unit base material.
  • the hole reinforcing portion is formed such that the tensile stress layer exposed on the wall surface of the through hole of the unit base material is covered with the hole reinforcing portion.
  • the through hole of the unit base material may be sealed on the second surface side of the unit base material.
  • the coating liquid is applied from the first surface side of the unit base material in a sealed space.
  • the hole reinforcing portion is formed so as to close the through hole of the unit base material.
  • the manufacturing method of the said cover glass is further equipped with the resin material processing process of forming a through-hole in the said reinforcement part for holes after the said hardening process.
  • a first protective film having a hole communicating with the through hole of the unit base material is provided on the first surface of the unit base material.
  • the wall surface of the hole of the first protective film may be positioned closer to the center of the through hole of the unit base material than the wall surface of the through hole of the unit base material.
  • the preparatory step of the method for manufacturing a cover glass according to the present invention includes a protective film forming step of providing the first protective film on which the holes are formed on the first surface of the unit base material, and the first protective film. And an etching step of forming the through-hole by wet-etching the unit base material as a resist.
  • a second protective film having a hole formed at a position corresponding to the hole of the first protective film is further provided on the second surface of the unit base material, and the etching is performed.
  • the unit base material is wet-etched from the first surface side and the second surface side using the first protective film and the second protective film as a resist, and in the coating step, the unit base material
  • the through hole may be sealed with a sealing member disposed on the second protective film.
  • a second protective film or a sealing member that seals the through hole of the unit base material is provided on the second surface of the unit base material, and in the etching step, The unit base material may be wet-etched from the first surface side using the first protective film as a resist.
  • the method for manufacturing a cover glass according to the present invention further includes an element part forming step of forming at least a part of an element part including at least one of a decoration part and a touch panel sensor part on the first surface side of the unit base material. You may have.
  • the element part forming step may be performed prior to the protective film forming step.
  • FIG. 1 is a developed view showing a display device with a cover glass in the first embodiment of the present invention.
  • FIG. 2 is a plan view showing a touch panel sensor unit provided on the cover glass of FIG. 1.
  • FIG. 3 is a cross-sectional view of the cover glass of FIG. 2 along the line III.
  • 4 is a cross-sectional view of the cover glass of FIG. 2 taken along line IV.
  • FIG. 5 is an enlarged cross-sectional view illustrating a side surface of the cover glass of FIG. 3.
  • FIG. 6A is a diagram showing a part of a step of forming a unit laminate having a unit substrate and a protective film using a substrate made of large tempered glass.
  • FIGS. 1 is a developed view showing a display device with a cover glass in the first embodiment of the present invention.
  • FIG. 2 is a plan view showing a touch panel sensor unit provided on the cover glass of FIG. 1.
  • FIG. 3 is a cross-sectional view of the cover glass of FIG. 2
  • FIGS. 6B (a) and 6 (b) are diagrams showing a part of a step of forming a unit laminate body having a unit base material and a protective film using a base material made of large tempered glass.
  • FIG. 6C is a diagram showing a part of a step of forming a unit laminate having a unit base material and a protective film using a base material made of large tempered glass.
  • FIGS. 6D (a) and 6 (b) are diagrams showing a part of a step of forming a unit laminate body having a unit base material and a protective film using a base material made of large tempered glass.
  • FIG. 7A is a diagram illustrating a part of a process for obtaining a cover glass whose side surface is reinforced by providing a resin on a side surface of a unit base material of the unit laminate body.
  • FIG. 7B is a diagram illustrating a part of a process for obtaining a cover glass whose side surface is reinforced by providing a resin on a side surface of a unit base material of the unit laminate body.
  • FIG. 7C is a diagram showing a part of a process for obtaining a cover glass whose side surface is reinforced by providing a resin on the side surface of the unit base material of the unit laminate body.
  • FIG. 7D is a diagram showing a part of a process for obtaining a cover glass whose side surface is reinforced by providing a resin on the side surface of the unit base material of the unit laminate body.
  • 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 diagram illustrating 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 diagram showing a step of forming the reinforcing portion 26 on the wall surface a of the through hole shown in FIG.
  • FIG. 19A is a diagram showing a part of a step of forming a unit laminate having a unit substrate and a protective film using a substrate made of large tempered glass.
  • FIG. 19B is a diagram showing a part of a step of forming a unit laminate including a unit base material and a protective film using a base material made of large tempered glass.
  • FIGS. 19C (a) and 19 (b) are diagrams showing a part of a process of forming a unit laminate having a unit substrate and a protective film using a substrate made of large tempered glass.
  • FIG. 19D (a), (b), and (c) are diagrams showing a part of a step of forming a unit laminate having a unit substrate and a protective film using a substrate made of large tempered glass.
  • FIG. 20A is a diagram showing a part of a step of reinforcing a through hole of a cover glass.
  • FIG. 20B is a diagram showing a part of the step of reinforcing the through hole of the cover glass.
  • FIG. 20C is a diagram showing a part of the step of reinforcing the through hole of the cover glass.
  • FIG. 20D is a diagram showing a part of the step of reinforcing the through hole of the cover glass.
  • FIG. 21A is a cross-sectional view showing a first protective film in a first modification of the second embodiment.
  • FIG. 21B is a cross-sectional view showing a unit laminate body obtained by etching the base material using the second protective film as a resist in the first modification example of the second embodiment.
  • FIG. 22A is a diagram illustrating a process of applying a coating liquid in a space surrounded by a second protective film and a through hole of a unit base material in the first modification example of the second embodiment.
  • FIG. 22B is a diagram showing a step of forming a through hole in the hole reinforcing portion in the first modification of the second embodiment.
  • FIG. 22C is a cross-sectional view showing the cover glass in the first modification example of the second embodiment.
  • FIG. 23A is a cross-sectional view showing a unit base material according to a second modification of the second embodiment.
  • FIG. 23B is a cross-sectional view showing a unit laminate body in a second modification example of the second embodiment.
  • FIG. 24A is a diagram showing a step of applying a coating liquid in a space surrounded by the second protective film and the through hole of the unit base material in the second modification example of the second embodiment.
  • FIG. 24B is a cross-sectional view showing the cover glass in the second modification example of the second embodiment.
  • FIG. 25A is a cross-sectional view showing a unit laminate body according to a third modification of the second embodiment.
  • FIG. 25B is a diagram illustrating a process of applying the coating liquid in a space surrounded by the second protective film and the through hole of the unit base material in the third modification example of the second embodiment.
  • FIG. 25C is a cross-sectional view showing a cover glass in a 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 is a cross-sectional view showing an example of a cover glass in a sixth modified example of the second embodiment.
  • FIG. 29 is a cross-sectional view showing another example of the cover glass in the sixth modified example of the second embodiment.
  • FIG. 30 is a diagram illustrating an example of a coating liquid applied to the wall surface of the through hole of the cover glass in the seventh modification example of the second embodiment.
  • FIG. 31 is a diagram illustrating another example of the coating liquid applied to the wall surface of the through hole of the cover glass in the seventh modification example of the second embodiment.
  • FIG. 32 is a plan view showing an example of a cover glass provided with a touch panel sensor unit in an eighth modification of the second embodiment. 33 is a cross-sectional view of the cover glass of FIG. 32 taken along line XXXIII. 34 is a cross-sectional view of the cover glass of FIG. 32 taken along line XXXIV.
  • FIGS. 36A to 36D are diagrams showing a method for evaluating the printability of a resin in Example 2.
  • FIGS. FIG. 37 is a diagram showing a method for evaluating the impact resistance of a resin in Example 3.
  • FIGS. 1 to 7D a first embodiment of the present invention will be described with reference to FIGS. 1 to 7D.
  • the scale, the vertical / horizontal dimension ratio, and the like are appropriately changed and exaggerated from those of the actual ones.
  • the display device 10 with a cover glass is configured by combining a display device 15 and a cover glass 20.
  • the illustrated display device 15 is configured as a flat panel display.
  • the display device 15 includes a display panel 16 having a display surface 16 a and a display control unit (not shown) connected to the display panel 16.
  • the display panel 16 includes an active area A1 that can display an image, and an inactive area (also referred to as a frame area) A2 that is disposed outside the active area A1 so as to surround the active area A1.
  • the display control unit processes information regarding the video to be displayed, and drives the display panel 16 based on the video information.
  • the display panel 16 displays a predetermined image on the display surface 16a based on a control signal from the display control unit. That is, the display device 15 plays a role as an output device that outputs information such as characters and drawings as video.
  • the cover glass 20 is disposed on the display surface 16 a of the display panel 16 on the viewer side of the display device 15.
  • the cover glass 20 is bonded to the display surface 16a of the display device 15 via an adhesive layer (not shown).
  • the surface (first surface) on the display device side of the cover glass 20 is represented by reference numeral 20a
  • the surface (second surface) on the observer side is represented by reference numeral 20b.
  • the cover glass 20 is configured to provide not only a function of protecting the display device 15 but also a touch panel function. Specifically, on the first surface 20a of the cover glass 20 on the display device 15 side, a touch panel sensor unit 40 including a sensor electrode for detecting the approach or contact of the external conductor is provided. Moreover, the 1st decorating part 60 for exhibiting a desired color is further provided in the inactive area Aa2 of the 1st surface 20a of the cover glass 20. As shown in FIG.
  • FIG. 2 is a plan view showing the cover glass 20 as viewed from the first surface 20a side.
  • the first decorating unit 60 is omitted for convenience of explanation.
  • the first surface 20a of the cover glass 20 corresponds to the active area Aa1 corresponding to the active area A1 and the inactive area A2 of the display panel 16, and the active area Aa1 corresponding to the area where the touch position can be detected. It is partitioned into an inactive area Aa2 located around the area Aa1.
  • the touch panel sensor unit 40 is connected to the plurality of sensor electrodes 41 and 42 disposed in the active area Aa1 and the corresponding sensor electrodes 41 and 42, and is disposed in the inactive area Aa2 of the cover glass 20.
  • the lead-out wiring 43 and a plurality of terminal portions 44 connected to the corresponding lead-out wiring 43 are provided.
  • the sensor electrodes 41 and 42 include a plurality of first sensor electrodes 41 extending along the first direction D1, and a plurality of second electrodes extending along a second direction D2 orthogonal to the first direction D1.
  • Sensor electrode 42 Each of the sensor electrodes 41 and 42 may include line portions 41a and 42a extending linearly and bulging portions 41b and 42b bulging from the line portions 41a and 42a.
  • the lead-out wiring 43 is provided in the inactive area Aa2 in order to transmit the signals detected by the corresponding sensor electrodes 41 and 42 to the terminal portion 44.
  • the signal transmitted to the terminal unit 44 by the extraction wiring 43 is transmitted to the detection control unit via a flexible substrate (not shown) attached to the terminal unit 44.
  • the layer configuration of the components arranged in the active area Aa1 of the cover glass 20 will be described.
  • the first line portion 41 a, the first bulge portion 41 b, and the second bulge portion 42 b of the touch panel sensor unit 40 may be formed on the same plane.
  • the first line portion 41a, the first bulging portion 41b, and the second bulging portion 42b are simultaneously formed by patterning the transparent conductive layer 51 made of a transparent conductive material such as indium tin oxide (ITO). It is possible.
  • 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 between the first line portion 41a and the second line portion 42a. Insulating layer 47 is interposed.
  • the layer configuration of the components arranged in the inactive area Aa2 of the cover glass 20 will be described.
  • the first decorative portion 60 is arranged in the inactive area Aa ⁇ b> 2 so as to be positioned closer to the observer side than the above-described extraction wiring 43.
  • the 1st decoration part 60 is visually recognized through the cover glass 20 from the observer side. That is, in the display device 10 with the cover glass, the appearance of the inactive area Aa2 is determined by the first decorating unit 60 and its surrounding components.
  • the color of the 1st decorating part 60 is selected according to the design property calculated
  • the material which comprises the 1st decorating part 60 is determined according to the selected color, for example, when white is calculated
  • the binder for example, a resin such as an acrylic resin, an epoxy resin, a polyurethane resin, a polyamide resin, or a mixture of these resins can be used as appropriate.
  • the first decorative portion 60 cannot spread to the side surface 20 c of the cover glass 20, that is, to the side surface 26 c of the reinforcing portion 26. For this reason, the design effect by the first decorative portion 60 does not reach the side surface 20 c of the cover glass 20, for example, the reinforcing portion 26. In consideration of this point, as shown in FIG. 3 and FIG.
  • the unit base 22 is located on the first surface 22 a side or the first surface 26 a side of the reinforcing portion 26 and outside the first decorating portion 60.
  • the 2nd decoration part 62 may be provided.
  • the 2nd decoration part 62 is comprised so that a predetermined color may be exhibited.
  • the range of the non-active area Aa2 that can exhibit a desired color is expanded to the outside, and design improvements such as prevention of light leakage from the outer peripheral portion are improved.
  • the 2nd decoration part 62 is comprised so that it may overlap with the reinforcement part 26, when it sees along the normal line direction of the 1st surface 20a of the cover glass 20.
  • the 2nd decoration part 62 is comprised so that it may reach even to the side surface 20c of the cover glass 20, when it sees along the normal line direction of the 1st surface 20a of the cover glass 20.
  • the color which the 2nd decoration part 62 exhibits is not specifically limited, According to the effect on the design requested
  • the 2nd decoration part 62 may be comprised with the material same as the 1st decoration part 60 so that the 1st decoration part 60 may exhibit the same color, or is different from the 1st decoration part 60. It may be configured to exhibit a color.
  • a method of providing the second decorating part 62 various known methods can be adopted. For example, after the reinforcing part 26 is formed, a coating liquid containing a material constituting the second decorating part 62 is screen-printed. A method of coating the first surface 26a of the reinforcing portion 26 by a printing method such as a method is employed.
  • examples of the solvent for constituting the coating liquid include ethers, ketones, esters, alcohols, polyhydric alcohols, aromatic hydrocarbons, and the like. Further, the surface tension of the coating solution is adjusted within a range of 20 to 40 mN / m, for example.
  • the cover glass 20 includes a unit base material 22 and a reinforcing portion 26.
  • the unit base member 22 includes a first surface 22a on the display device side, a second surface 22b opposite to the first surface 22a, and a side surface 22c extending between the first surface 22a and the second surface 22b. Yes.
  • the reinforcing portion 26 is provided on the side surface 22 c of the unit base material 22.
  • the unit base material 22 is obtained by dividing the base material 30 made of large tempered glass into individual pieces. As shown in FIG. 5, the unit base material 22 includes a compressive stress layer 24a formed on the first surface 22a and the second surface 22b, a compressive stress layer 24a on the first surface 22a side, and a second surface 22b side. And a tensile stress layer 24b located between the compressive stress layer 24a.
  • the compressive stress layer 24a is a layer in which compressive stress is generated
  • the tensile stress layer 24b is a layer in which tensile stress is generated.
  • physical strengthening wind cooling strengthening
  • chemical strengthening are known as a method for generating the compressive stress layer 24a and the tensile stress layer 24b.
  • a chemical treatment is performed in which alkali ions contained in glass are exchanged with other alkali ions having a larger ionic radius at a temperature below the strain point.
  • compressive stress can be generated near the surface layer where the ions are exchanged.
  • some kind of impact is applied to the first surface 22a or the second surface 22b, and thereby a scratch such as a crack is formed on the first surface 22a or the second surface 22b. Even can prevent the wound from expanding. For this reason, the 1st surface 22a and the 2nd surface 22b of the unit base material 22 have the high tolerance with respect to an impact.
  • aluminosilicate glass can be used as a material constituting the unit base member 22.
  • the thickness of the compressive stress layer 24a is generally in the range of 10 to 100 ⁇ m.
  • the tensile stress layer 24 b of the unit base material 22 reaches the side surface 22 c of the unit base material 22. That is, the tensile stress layer 24 b is exposed on the side surface 22 c of the unit base material 22. For this reason, the side surface 22c of the unit base material 22 is weak against damage such as cracks, compared to the first surface 22a and the second surface 22b of the unit base material 22.
  • the reinforcing portion 26 described above is provided to protect the side surface 22c of the unit base material 22 as described above.
  • the reinforcing portion 26 for example, a curable resin that is cured by a polymerization reaction by heating or ultraviolet irradiation is used.
  • the reinforcing part 26 has a desired fluidity at the time of molding before curing, and the reinforcing part 26 has a desired hardness and strength after curing. This makes it possible to achieve both formability, hardness and strength.
  • the reinforcement part 26 is exposed at least partially with respect to external environments, such as air
  • the polymerization reaction when the reinforcing portion 26 is cured proceeds in an environment where the reinforcing portion 26 is exposed to the external environment such as the atmosphere.
  • a resin material having a high reactivity such as an acrylic resin
  • the polymerization reaction is inhibited by oxygen, and as a result, the polymerization reaction cannot proceed sufficiently, and therefore the reinforcing portion having sufficient hardness. 26 cannot be obtained.
  • the reinforcing portion 26 becomes brittle, and as a result, defects or the like frequently appear in the reinforcing portion 26. That is, it is considered that the toughness of the reinforcing portion 26 is lowered.
  • the second decorative portion 62 may be a screen printing method or the like. It is formed by a printing method or the like.
  • the reinforcement part 26 is predetermined wettability with respect to the material which comprises the 2nd decoration part 62, ie, printability. It is required to have.
  • a polyene-polythiol-based resin is used as the resin material contained in the reinforcing portion 26 as supported by the examples described later.
  • the polyene-polythiol-based photocurable resin refers to a polyene-polythiol-based resin configured so that a polymerization reaction proceeds due to light irradiation.
  • the characteristics of the polyene-polythiol photocurable resin will be described.
  • the polyene-polythiol-based photocurable resin contains an ene compound, a thiol compound, and a photopolymerization initiator.
  • a polyene-polythiol-based photocurable resin has an advantage that it is not subjected to polymerization inhibition due to oxygen as compared with an acrylic photocurable resin.
  • the polyene-polythiol-based photocurable resin can protect the unit base material 22 from an impact and has an appropriate hardness so as not to become brittle.
  • a polyene-polythiol-based photocurable resin that has undergone an appropriate polymerization reaction has a hardness in the range of D50 to D75.
  • “appropriately undergoing a polymerization reaction” means that the polymerization reaction was carried out under the conditions recommended by the material manufacturer providing the resin material. Note that the above-mentioned characteristics regarding hardness are not limited to polyene-polythiol-based photocurable resins in which a polymerization reaction proceeds due to light irradiation, but apply to polyene-polythiol-based resins in general including ene compounds and thiol compounds. It is a feature.
  • the feature of not being subjected to polymerization inhibition due to oxygen as compared with acrylic photo-curable resin is not limited to the case where polyene-polythiol resin is cured by light irradiation, such as electron beam irradiation and heating. This is also the case when the polyene-polythiol resin is cured due to other factors. That is, the polyene-polythiol-based resin may be configured as a polyene-polythiol-based electron beam curable resin or a polyene-polythiol-based thermosetting resin.
  • the polythiol-based thermosetting resin contains, for example, an ene compound, a thiol compound, and a thermal polymerization initiator such as ⁇ , ⁇ ′ azobisisobutylnitrile (AIBN).
  • a thermal polymerization initiator such as ⁇ , ⁇ ′ azobisisobutylnitrile (AIBN).
  • the composition ratio of the ene compound and the thiol compound in the polyene-polythiol-based resin such as polyene-polythiol-based photocurable resin is appropriately determined according to the required characteristics.
  • the polythiol-based resin has 20 to 80% by weight of ene compound and 20 to 80% by weight of thiol compound.
  • the sum of the weight% of the ene compound and the weight% of the thiol compound may be 100.
  • polyene-polythiol-based resins such as polyene-polythiol-based photocurable resins also have an advantage of less curing shrinkage than acrylic resins such as acrylic-based photocurable resins.
  • cover glass 20 according to the present embodiment and curing shrinkage will be described.
  • the reinforcing portion 26 is formed by curing the coating liquid 27. For this reason, if a large shrinkage occurs when the coating liquid 27 is cured, the accuracy of the size of the reinforcing portion 26 is lowered. Moreover, when large shrinkage arises, the adhesiveness between the reinforcement part 26 and the unit base material 22 will also fall.
  • the resin material constituting the reinforcing portion 26 is preferably a material that is as small as possible when shrinking when cured.
  • the unit when the thickness of the base material 22 is 700 ⁇ m, a step generated between the surfaces 26 a and 26 b of the reinforcing portion 26 and the surfaces 22 a and 22 b of the unit base material 22 can be suppressed within a range of 1 to 10 ⁇ m, for example.
  • the thickness of the compressive stress layer 24a is generally in the range of 10 to 100 ⁇ m. Therefore, selecting a material having a small shrinkage when cured and thereby suppressing the step between the unit base member 22 and the reinforcing portion 26 within a range of 1 to 10 ⁇ m respectively, the degree of shrinkage is that of the compressive stress layer 24a. It leads to become smaller than thickness. For this reason, even if the reinforcing portion 26 contracts during curing, it is possible to prevent the tensile stress layer 24b from being exposed on the side surface 20c of the cover glass 20 or a wall surface 23c of a through hole 23 described later.
  • composition of a polyene-polythiol resin such as a polyene-polythiol photocurable resin will be described in detail.
  • An ene compound is a polyfunctional compound having two or more carbon-carbon double bonds in one molecule.
  • the order becomes vinyl ethers, vinyl esters, allyl ethers, allyl isocyanuric acid derivatives, acrylic acid derivatives, and styrenes.
  • the thiol compound is a compound having two or more thiol groups in one molecule, and examples thereof include esters of mercaptocarboxylic acid and a polyhydric alcohol, aliphatic polythiols and aromatic polythiols, and other polythiols. These 1 type (s) or 2 or more types can be used.
  • Examples of the mercaptocarboxylic acid in the ester of mercaptocarboxylic acid and polyhydric alcohol include thioglycolic acid, ⁇ -mercaptopropionic acid and ⁇ -mercaptopropionic acid.
  • the blend ratio of the ene compound (a) and the thiol compound (b) is such that the ratio of the number of unsaturated bonds of the ene compound (a) to the number of thiol groups of the thiol compound (b) is 2: 1 to 1: 2.
  • a range is preferable. When the amount of thiol groups exceeds 1: 2, a large amount of unreacted thiol groups remain in the composition after the curing reaction. It is not preferable from the viewpoint that there are few advantages such as high adhesion and no polymerization inhibition due to oxygen.
  • the photopolymerization initiator is not particularly limited, and a known photopolymerization initiator can be used.
  • a photopolymerization initiator in the case of a resin system having a radical polymerizable unsaturated group, it is commercially available as acetophenones (for example, trade name Irgacure 184 (manufactured by Ciba Specialty Chemicals) 1 -Hydroxy-cyclohexyl-phenyl-ketone), benzophenones, thioxanthones, propiophenones, benzyls, acylphosphine oxides, benzoin, benzoin methyl ether and the like can be used alone or in combination.
  • acetophenones for example, trade name Irgacure 184 (manufactured by Ciba Specialty Chemicals) 1 -Hydroxy-cyclohexyl-phenyl-ketone
  • benzophenones 1, thi
  • the photopolymerization initiator (c) is preferably added in a proportion of 0.001 to 10% by mass with respect to the total amount of the ene compound (a) and the thiol compound (b). If it is less than 0.001% by mass, there may be a problem that the photopolymerization reaction cannot be sufficiently caused. Moreover, even if it adds exceeding 10 mass%, the improvement of an effect is not seen.
  • FIG. 5 is an enlarged cross-sectional view of the side surface 20c of the cover glass 20 of FIG.
  • the reinforcing portion 26 includes a first surface 26 a that extends from the vicinity of the end 22 ae of the first surface 22 a on the same plane as the first surface 22 a of the unit substrate 22, and the unit substrate 22.
  • the second surface 22b extends from the vicinity of the end 22be of the second surface 22b to the side on the same plane as the second surface 22b and between the first surface 26a and the second surface 26b of the reinforcing portion 26.
  • Side surface 26c an advantage provided by the reinforcing portion 26 including the first surface 26a and the second surface 26b will be described.
  • Patent Document 2 When providing a reinforcing portion that reinforces the side surface of the base material by trimming the outer peripheral surface of the base material as in Patent Document 2, a step is formed between the surface of the reinforcing portion and the surface of the base material. . Therefore, light is likely to be scattered at the boundary between the reinforcing portion and the base material, and the light transmittance and reflectance are likely to change greatly. As a result, the boundary between the reinforcing portion and the base material is easily visually recognized by the observer. That is, it is conceivable that the design properties of the cover glass deteriorate. Moreover, when the reinforcement part of a cover glass is exposed outside, the operation feeling of a touch panel will be inhibited by the level
  • the first surface 22a of the unit base member 22 and the first surface 26a of the reinforcing portion 26 are located on the same plane.
  • the 2nd surface 22b of the unit base material 22 and the 2nd surface 26b of the reinforcement part 26 are located on the same plane. That is, there is no or almost no step between the unit base member 22 and the reinforcing portion 26.
  • the steps 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 are each 10 ⁇ m or less. For this reason, it can suppress that the boundary between the unit base material 22 and the reinforcement part 26 is visually recognized by an observer.
  • the thickness of the compressive stress layer 24a is generally in the range of 10 to 100 ⁇ m. 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 ⁇ m or less, that is, the step is the compressive stress layer 24a.
  • the compressive stress layer 24a of the unit base material 22 and the reinforcing portion 26 overlap at least partially on the side surface 22c of the unit base material 22. Therefore, the tensile stress layer 24 b exposed on the side surface 22 c of the unit base material 22 can be covered with the reinforcing portion 26 without a gap. For this reason, the impact resistance of the cover glass 20 can be increased more reliably.
  • the first surface 26a and the second surface 26b of the reinforcing portion 26 are respectively on the same plane as the first surface 22a and the second surface 22b of the unit base member 22 from the end 22ae and the end 22be over at least 300 ⁇ m. It extends toward. Thereby, the intensity
  • “on the same plane” extends from the end 22ae and the end 22be to the side over at least 300 ⁇ m of the first surface 26a and the second surface 26b of the reinforcing portion 26, as in the case of the above-described step. This means that the distance in the thickness direction of the unit base material 22 between the portion and the first surface 22a and the second surface 22b of the unit base material 22 is 10 ⁇ m or less.
  • the side surface 26c of the reinforcing portion 26 will be described.
  • the end portion of the first surface 26a of the reinforcing portion 26 is represented by reference numeral 26ae
  • the end portion of the second surface 26b of the reinforcing portion 26 is represented by reference numeral 26be.
  • the side surface 26 c is configured as a flat surface that extends substantially flat between the end portion 26 ae and the end portion 26 be.
  • the first surface 26a and the side surface 26c intersect at a substantially right angle, and similarly, the second surface 26b and the side surface 26c intersect at a substantially right 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 in FIG. 5 (the direction in which the first surface 26a and the second surface 26b extend) match.
  • the side surface 22c of the unit base member 22 includes a first side surface 22d and a second side surface 22e.
  • the first side surface 22d intersects the end 22ae of the first surface 22a of the unit base material 22, and spreads outward as it goes to the second surface 22b side of the unit base material 22.
  • the second side surface 22e intersects the end 22be of the second surface 22b of the unit base member 22, expands outward toward the first surface 22a side of the unit base member 22, and joins the first side surface 22d. Yes.
  • merging part of 22 d of 1st side surfaces and the 2nd side surface 22e will protrude outside.
  • the reinforcing portion 26 sandwiches the side surface 22c of the unit base material 22, the reinforcing portion 26 can be firmly adhered to the side surface 22c of the unit base material 22.
  • the substrate 30 is formed by wet etching from both sides.
  • the dimensions of the cover glass 20 will be described.
  • the covering dimension is 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.
  • the minimum value of the covering dimension of the reinforcing portion 26 is represented by the symbol Tmin.
  • the first side surface 22d of the unit base member 22 spreads outward toward the second surface 22b side.
  • the 2nd side 22e of the unit base material 22 has spread outside as it goes to the 1st surface 22a side.
  • 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 a right angle. Therefore, as shown in FIG. 5, at the position where the first side surface 22d and the second side surface 22e merge, the covering dimension of the reinforcing portion 26 becomes the minimum value Tmin.
  • the minimum value Tmin of the covering dimension of the reinforcing portion 26 is appropriately set so that the side surface 22c of the unit base material 22 can be protected even when an impact is applied to the side surface 20c of the cover glass 20 or the like. Yes.
  • the minimum value Tmin of the covering dimension of the reinforcing portion 26 is set to 20 ⁇ m or more.
  • the covering dimension of the reinforcing portion 26 is the maximum value at the position of the first surface 26a or the position of the second surface 26b.
  • the maximum value of the covering dimension of the reinforcing portion 26 becomes too large, it is considered that the reinforcing portion 26 is easily peeled off from the unit base material 22 when an impact is applied to the cover glass 20.
  • the ratio of the glass in the cover glass 20 reduces and the ratio of resin increases, it is also considered that the intensity
  • the maximum value of the coating size of the reinforcing portion 26 is set to 250 ⁇ m or less in the thinnest portion (the portion represented by the symbol Tmin in FIG. 5), and the thickest portion (see FIG. 5). In the portion represented by the symbol Tmax), it is preferably set to 500 ⁇ m or less.
  • the covering dimension Tmin of the reinforcing part 26 in the thinnest part is set to 100 ⁇ m, and the covering dimension Tmax of the reinforcing part 26 in the thickest part is set to 300 ⁇ m. Conceivable.
  • the thickness of the cover glass 20 (that is, the thickness of the unit base material 22 and the thickness of the reinforcing portion 26) is appropriately set according to the required strength, the area of the cover glass 20, and the like. It is within range.
  • FIGS. 6A to 6E (a) and 6 (b) a process of forming a unit laminate 35 having a unit substrate 22 and protective films 81 and 82 using a substrate 30 made of large tempered glass.
  • 6A, 6B (a), FIG. 6C, FIG. 6D (a), and FIG. 6E (a) are cross-sectional views showing the substrate 30 in this step.
  • FIG. 6E (b) is an enlarged cross-sectional view of the unit laminate body 35 shown in FIG. 6E (a).
  • 6B (b) and 6D (b) are plan views showing the base material 30 in this step.
  • a base material 30 made of large tempered glass is prepared.
  • 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.
  • a compressive stress layer 24a is formed on the first surface 30a, the second surface 30b, and the side surface 30c of the base material 30, and a tensile stress layer 24b exists inside the compressive stress layer 24a. is doing.
  • the entire surface of the base material 30 is formed by the compressive stress layer 24a.
  • the 1st decorating part 60 and the touchscreen sensor part 40 are formed in a predetermined some division (element part formation) Process).
  • the first surface 30a of the base material 30 is divided into two rows in the vertical direction of the paper surface and divided into three columns in the horizontal direction of the paper surface.
  • the decoration part 60 and the touch panel sensor part 40 are formed.
  • the number of sections of the base material 30 is not particularly limited.
  • a method of forming the first decorating unit 60 and the touch panel sensor unit 40 on the first surface 30a side a known method is appropriately used, and for example, a photolithography method is used.
  • the touch panel sensor unit 40 and the first decoration unit 60 may be collectively referred to as an element unit 70.
  • a protective film forming step of providing the first protective film 81 and the second protective film 82 in a predetermined plurality of sections on the first surface 30a and the second surface 30b of the base material 30 is performed.
  • a first protective film 81 is provided on the first surface 30a of the substrate 30 to continuously cover the element portions 70 respectively provided in the plurality of sections.
  • a second protective film 82 is provided on the second surface 30 b of the substrate 30.
  • 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.
  • the protective films 81 and 82 function as a resist that protects the element portion 70 when the substrate 30 is divided by wet etching, which will be described later, using hydrofluoric acid or the like.
  • the material which comprises the protective films 81 and 82 is not specifically limited.
  • biaxially stretched polypropylene or unstretched polypropylene having a thickness of about 50 to 100 ⁇ m can be used as a material for forming the protective films 81 and 82.
  • the protective film 81, 82 is configured.
  • the first protective film 81 and the second protective film 82 provided over the entire area of the first surface 30a and the second surface 30b are replaced with the first surface 30a and the second protective film 82, respectively.
  • the specific method for dividing the first protective film 81 and the second protective film 82 is not particularly limited, and various methods can be adopted.
  • unnecessary portions (portions that become gaps) of the first protective film 81 may be removed using a mold having a shape corresponding to the shape of the first protective film 81 shown in FIG. 6D (b).
  • unnecessary portions (portions that become gaps) of the second protective film 82 can be removed.
  • unnecessary portions of the first protective film 81 and the second protective film 82 may be removed using laser processing.
  • a cutting step of cutting the base material 30 along the gap between the first protective film 81 and the second protective film 82 provided in each section of the base material 30 is performed.
  • the base material 30 is wet-etched from the first surface 30a side and the second surface 30b side of the base material 30 by using the first protective film 81 and the second protective film 82 as resists, thereby removing the base material 30.
  • Disconnect As the etching solution, hydrofluoric acid or the like is used as described above. As a result, as shown in FIG.
  • the unit base 22 made of glass, the element part 70 provided on the first surface 22a side of the unit base 22, and the first surface 22a of the unit base 22
  • the unit laminated body 35 having the first protective film 81 provided on the element portion 70 and the second protective film 82 provided on the second surface 22b of the unit base member 22 can be obtained.
  • FIG. 6E (b) is an enlarged cross-sectional view of the unit laminate body 35 shown in FIG. 6E (a).
  • the first protective film 81 is configured to protrude laterally from the first surface 22a of the unit base member 22.
  • the second protective film 82 is configured to protrude from the second surface 22 b of the unit base member 22 to the side.
  • Such a relationship between the unit base material 22 and the first protective film 81 and the second protective film 82 is based on the fact that the first surface 22a of the unit base material 22 and the first surface 22a of the unit base material 22 and This is realized by continuing the etching process for a time that allows the unit base material 22 to be penetrated by etching from both of the two surfaces 22b.
  • etching proceeds isotropically in both the depth direction and the horizontal direction at a position in the vicinity of the first surface 22a and the second surface 22b of the side surface 22c of the unit base member 22 in general. For this reason, as shown in FIG.
  • FIGS. 7A to 7D a process for obtaining a cover glass 20 whose side surfaces are reinforced by providing reinforcing portions (resin etc.) on the side surfaces 22c of the unit base material 22 of the unit laminate body 35 will be described. explain.
  • an application step of applying an application liquid 27 containing a curable material such as an ultraviolet curable resin or a thermosetting resin onto the side surface 22c of the unit base material 22 is performed.
  • a curable material such as an ultraviolet curable resin or a thermosetting resin
  • the coating liquid containing acrylic resin and a photoinitiator is used in the coating process.
  • the coating liquid 27 is 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, as shown in FIG. 7A.
  • the coating liquid 27 may be applied to the extent that it overflows also onto the end surface 81c of the first protective film 81 and the end surface 82c of the second protective film 82.
  • the coating liquid 27 overflowing on the end surface 81c of the first protective film 81 and the end surface 82c of the second protective film 82 is scraped off using a squeegee or the like.
  • the surface of the coating liquid 27 coincides with the end surface 81 c of the first protective film 81 and the end surface 82 c of the second protective film 82. That is, the position of the end of the liquid surface of the coating liquid 27 on the first protective film 81 side coincides with the position of the end surface 81c of the first protective film 81, and the liquid surface of the coating liquid 27 on the second protective film 82 side.
  • the position of the end portion coincides with the position of the end surface 82 c of the second protective film 82.
  • a curing step of curing the coating liquid 27 provided on the side surface 22c of the unit base material 22 is performed.
  • the coating liquid 27 is cured by irradiating the coating liquid 27 with light such as ultraviolet rays.
  • the reinforcing part 26 is formed on the side surface 22 c of the unit base material 22.
  • 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.
  • a cover glass 20 including the unit base material 22 and the reinforcing portion 26 provided on the side surface 22c of the unit base material 22 can be obtained.
  • the second decorative portion 62 is placed at a position on the first surface 22 a side of the unit base member 22 or the first surface 26 a side of the reinforcing portion 26 and outside the first decorative portion 60. It may be provided.
  • the 2nd decorating part 62 is comprised so that the 1st decorating part 60 and the same color may be exhibited, for example.
  • the range of the non-active area Aa2 that can exhibit a desired color is expanded to the outside, and design improvements such as prevention of light leakage from the outer peripheral portion are improved.
  • the 2nd decorating part 62 is comprised so that it may overlap with the reinforcement part 26, when it sees along the normal line direction of the 1st surface 20a of the cover glass 20.
  • the reinforcing portion 26 made of a curable resin is provided on the side surface 22c of the unit base material 22. For this reason, when an impact is applied to the side surface 20 c of the cover glass 20, the force transmitted to the side surface 22 c of the unit base material 22 is alleviated by the reinforcing portion 26, and damage such as cracks occurs on the side surface 22 c of the unit base material 22. This can be suppressed. Thereby, even if the compressive stress layer is not formed on the side surface 22c of the unit base member 22, the impact resistance of the cover glass 20 can be sufficiently increased.
  • the exposed tensile stress layer 24b can be covered with the reinforcing portion 26, so that the impact resistance of the cover glass 20 is increased. Sex can be made high enough.
  • the resin material constituting the reinforcing portion 26 includes a polyene-polythiol resin. For this reason, even if it is a case where the reinforcement part 26 is exposed with respect to external environments, such as air
  • the wettability of the surface of the reinforcing portion 26 can be appropriately ensured.
  • the coating liquid applied on the first surface 26a of the reinforcing part 26 after the reinforcing part 26 is formed, for example, the coating liquid for the second decorating part 62 remains stably on the first surface 26a.
  • the printability of the first surface 26a of the reinforcing portion 26 can be sufficiently ensured. This makes it possible to uniformly form components such as the second decorative portion 62 on the first surface 26 a of the reinforcing portion 26.
  • the reinforcement part 26 is laterally protruded from the 1st protective film 81 and the 2nd surface 22b of the unit base material 22 which protruded from the 1st surface 22a of the unit base material 22 as mentioned above. It is formed in a space positioned by the protruding second protective film 82. For this reason, as shown to FIG. 7C and FIG. 7D, the 1st surface 22a of the unit base material 22 and the 1st surface 26a of the reinforcement part 26 are located on the same plane. Similarly, the 2nd surface 22b of the unit base material 22 and the 2nd surface 26b of 26 are located on the same plane.
  • the reinforcement part 26 of this Embodiment ensuring of the intensity
  • the coating liquid 27 overflowing on the end surface 81c of the first protective film 81 and the end surface 82c of the second protective film 82 is used using a squeegee or the like.
  • the side surface 26c of the reinforcing portion 26 is leveled.
  • the position of the end part 26ae of the first surface 26a coincides with the position of the end face 81c of the first protective film 81.
  • the position of the end portion 26be of the second surface 26b of the reinforcing portion 26 matches the position of the end surface 82c of the second protective film 82.
  • the position of the end portion 26ae of the first surface 26a and the position of the end portion 26be of the second surface 26b of the reinforcing portion 26 are set to the positions of the end surfaces 81c and 82c of the protective films 81 and 82.
  • the reinforcing portion 26 is formed based on the coating liquid 27 having a predetermined fluidity. Therefore, if the coating liquid 27 is applied without using a frame such as the protective films 81 and 82, it is difficult to precisely control the dimensions such as the thickness and shape of the coating liquid 27.
  • the positions of the end faces 81c and 82c of the protective films 81 and 82 are determined with high accuracy by processing using a mold or a laser as described above. Therefore, according to the present embodiment, it is possible to realize the accuracy according to the accuracy in the processing using a mold or a laser as the accuracy of the dimensions such as the thickness and shape of the coating liquid 27. For this reason, according to this Embodiment, the position of edge part 26ae, 26be of the reinforcement part 26, ie, the position of the edge part of the cover glass 20, can be defined with a sufficient precision. Thereby, when the cover glass 20, the display device 15, and the case are assembled, the ease of the process and the yield can be increased.
  • the process precision of the 1st decorating part 60 with respect to the display apparatus 15 and the touchscreen sensor part 40 is also improved. be able to. Thereby, the high designability and operativity of the display apparatus 10 with a cover glass are realizable.
  • the side surface 26c of the reinforcing portion 26 is configured as a flat surface that extends substantially flat between the end portion 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 reinforcing portion.
  • the position of the entire side surface 26c of the 26 is also determined according to the positions of the end surfaces 81c and 82c of the protective films 81 and 82. That is, the processing accuracy of the entire side surface 20c of the cover glass 20 as well as the end portion of the cover glass 20 can be increased.
  • the side surface 20c of the cover glass 20 is comprised by the reinforcement part 26 which consists of resin, compared with the case where the side surface 20c of the cover glass 20 is comprised with glass, it is a cover.
  • the edge portion of the side surface 20c of the glass 20 does not need to be subjected to laceration prevention processing such as chamfering.
  • the reinforcement part 26 of the cover glass 20 may be comprised so that the 1st decoration part 60 provided in the 1st surface 20a side of the cover glass 20 and the 2nd decoration part 62 may be exhibited.
  • the reinforcing portion 26 may include a color pigment having the same color as the color pigment included in the first decorative portion 60 and the second decorative portion 62.
  • the area around the outer edge of the non-active area Aa2 is visually recognized as an area having the same color as the areas of the first decorative portion 60 and the second decorative portion 62 located on the inner side. For this reason, the effect on the design similar to the case where the 1st decorating part 60 and the 2nd decorating part 62 are extended to the outer edge of inactive area Aa2 can be acquired.
  • the 1st decoration part 60 and the 2nd decoration part 62 are formed by apply
  • the reinforcement part 26 is colored as described above, the first decorative part 60 and the second decorative part 62 are not provided in the region around the outer edge of the inactive area Aa2, and thus the inactive area Aa2 is provided.
  • a region around the outer edge of the image is visually recognized with a desired color. For this reason, the process of providing the 1st decorating part 60 and the 2nd decorating part 62 can be made easier.
  • the “same color” means that the chromaticities of the two colors are close enough that the difference in color cannot be discerned with the naked eye. More specifically, “same color” means that the color difference ⁇ E * ab between the two colors is 10 or less, preferably 3 or less. The “different color” means that the color difference ⁇ E * ab between the two colors is larger than 10.
  • the color difference ⁇ E * ab is a value calculated based on L * , a * and b * in the L * a * b * color system, and is an index relating to a color difference when observed with the naked eye. Is the value.
  • the element part forming step of forming the element part 70 such as the first decoration part 60 and the touch panel sensor part 40 on the first surface 30 a of the base material 30 is performed on the base material 30.
  • the example implemented prior to the protective film formation process which provides the protective film 81 and the 2nd protective film 82 was shown.
  • the present invention is not limited to this, and a step of providing the first protective film 81 and the second protective film 82 on the base material 30 in a state where the element portion 70 is not provided, and then cutting the base material 30 and You may implement the process of providing the reinforcement part 26 on the side surface 22c of the unit base material 22.
  • FIG. As a result, as shown in FIG. 8, it is possible to obtain the cover glass 20 including the unit base material 22 and the reinforcing portion 26 provided on the side surface 22 c of the unit base material 22.
  • the reinforcing portion 26 may be configured to exhibit a predetermined color.
  • the reinforcing part 26 may include a color pigment exhibiting a predetermined color.
  • the cover glass 20 may further include a decorating portion provided on the first surface 26 a of the reinforcing portion 26 after the reinforcing portion 26 is formed.
  • the first protective film 81 and the second protective film 82 are provided for the base material 30 in a state where neither the first decoration unit 60 nor the touch panel sensor unit 40 is provided.
  • An example is shown.
  • the present invention is not limited to this, and the first protective film 81 and the second protective film 82 with respect to the base material 30 in a state where the touch panel sensor unit 40 is not provided but the first decoration unit 60 is provided.
  • the step of cutting the base material 30 and the step of providing the reinforcing portion 26 on the side surface 22c of the unit base material 22 may be performed. Accordingly, as shown in FIG.
  • the unit base material 22, the first decorating part 60 provided on the first surface 22 a of the unit base material 22, and the side surface 22 c of the unit base material 22 are provided.
  • the cover glass 20 provided with the reinforcement part 26 can be obtained.
  • the cover glass 20 may further include a second decorating part 62 provided at a position outside the first decorating part 60 after the reinforcing part 26 is formed.
  • the shape of the side surface 26c that is, the shape of the side surface 20c of the cover glass 20 may be adjusted by processing the side surface 26c of the reinforcing portion 26. Since the reinforcement part 26 is comprised with the resin material as mentioned above, compared with the case where the side surface 20c of the cover glass 20 is comprised with the tempered glass, the side surface 20c of the cover glass 20 is processed, and a desired shape is formed. It is easier to get. In addition, strength reduction and microcracks are less likely to occur due to processing. As a processing method, for example, processing using a polishing machine can be employed.
  • the side surface 26c of the reinforcing portion 26 may be processed so that both the end portion 26ae on the first surface 26a side and the end portion 26be on the second surface 26b side of the reinforcing portion 26 are scraped off. .
  • both the portion that intersects the first surface 26 a and the portion that intersects the second surface 26 b of the side surface 26 c of the reinforcing portion 26 are processed into round surfaces. Even in this case, if even a part that is not processed (unprocessed part 26d) remains on the side surface 22c, the outer shape of the cover glass 20 is increased based on the above-described coating method using the protective films 81 and 82.
  • FIG. 10 shows an example in which the side surface 26c is processed so that the side surface 26c becomes a round surface.
  • the present invention is not limited to this, and although not illustrated, the side surface 26c becomes a square surface. 26c may be processed.
  • the side surface 26c of the reinforcing portion 26 may be processed.
  • the reinforcing portion 26 is formed by applying 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 is shown, but the present invention is not limited to this.
  • the resin material constituting the reinforcing part contains a polyene-polythiol-based resin so that it is sufficiently polymerized.
  • a reinforced part having a desired hardness and toughness after the reaction can be obtained.
  • the printability of the reinforcing part can be sufficiently ensured.
  • FIG. 11 is a cross-sectional view showing an example of the cover glass 20 provided with the reinforcing portion 26 formed by the dipping method.
  • the side surface 22c intersects the end portion 22ae of the first surface 22a of the unit base member 22, and the first side surface 22d that spreads outward toward the second surface 22b side of the unit base member 22. And the second surface 22e that intersects with the end 22be of the second surface 22b of the unit base member 22 and expands outward as it goes to the first surface 22a side of the unit base member 22 is shown.
  • the shape of the side surface 22c is not particularly limited as long as the reinforcing portion 26 can be provided.
  • the side surface 22c may extend 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 using a laser. Further, by forming a scribe line on the surface of the base material 30 using a cutter or a laser, and then applying a striking force or a bending stress to the base material 30, the base material 30 is cut from the scribe line as a starting point.
  • the side surface 22c shown in FIG. 12 may be formed.
  • the present invention is not limited to this, and as shown in FIG. 13, the compressive stress layer 24 a may be formed not only on the first surface 22 a and the second surface 22 b of the unit base member 22 but also on the side surface 22 c. Even in this case, the force transmitted to the side surface 22c of the unit base material 22 when the impact is applied to the side surface 20c of the cover glass 20 is reduced by providing the reinforcing portion 26 on the side surface 22c of the unit base material 22. can do.
  • the method for forming the reinforcing portion 26 on the side surface 22c is not particularly limited, and the methods described in the present embodiment and the modified examples are appropriately adopted.
  • the reinforcing portion provided on the wall surface 25c of the through hole 25 is denoted by reference numeral 28 for distinction from the reinforcing portion provided on the side surface 22c constituting the outer shape of the unit base member 22. Has been.
  • FIG. 15 is a cross-sectional view showing a step of forming the reinforcing portion 28 on the wall surface 25c of the through hole 25 shown in FIG.
  • FIG. 15 shows a state in which the reinforcing portion 26 is formed not only on the wall surface 25 c of the through hole 25 but also on the side surface 22 c constituting the outer shape of the unit base material 22.
  • the first protective film 81 and the second protective film 82 are provided so as to protrude inward from the wall surface 25 c of the through hole 25 of the unit base material 22.
  • the coating liquid 27 in the space surrounded by the wall surface 25c of the through hole 25 of the unit base member 22, the first protective film 81, and the second protective film 82, as shown in FIG.
  • the reinforcing portion 28 can be formed on the wall surface 25c with dimensional accuracy.
  • the reinforcing portion 28 provided on the wall surface 25c of the through hole 25 of the unit base member 22 includes a polyene-polythiol resin. For this reason, it is possible to provide the reinforcing portion 28 having a desired hardness that has undergone a sufficient polymerization reaction on the wall surface 25 c of the through hole 25. Further, the printability of the reinforcing portion 28 can be sufficiently ensured.
  • the reinforcing portion 26 and the coating solution 27 include a curable resin that cures by heating or ultraviolet irradiation and is cured by the polymerization reaction.
  • the present invention is not limited thereto. There is nothing. When it is applied onto the side surface 22c of the unit base member 22, it has a predetermined fluidity. However, as long as it can be cured thereafter, the first embodiment and each modified example, or a second type which will be described later.
  • various fluids can be used as the coating liquid 27 for forming the reinforcing portion 26.
  • a fluid made of a resin material melted by heat may be used as the coating liquid 27.
  • curing is a concept including not only a phenomenon in which the resin material is cured by heating or ultraviolet irradiation, but also a phenomenon in which the resin material is cured by being cooled and solidified.
  • the resin material may be cooled and solidified by natural cooling, or the resin material may be cooled and solidified by forced cooling.
  • Solidification means that the substance changes from a gas or liquid state to a solid state.
  • the side surface of the unit base material 22 provided with the reinforcing portion is the wall surface 25c of the through hole 25 formed in the unit base material 22.
  • An example is shown.
  • the reinforcing portion 28 is provided on the wall surface 25c of the through hole 25 will be described in more detail.
  • the reinforcing portion 28 provided on the wall surface 25 c of the through hole 25 is also referred to as a hole reinforcing portion 28.
  • the reinforcing portion provided on the side surface 22 c constituting the outer shape of the unit base material 22 is also referred to as a side surface reinforcing portion 26.
  • the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
  • FIG. 16 is a plan view showing cover glass 20 in the present embodiment.
  • the cover glass 20 includes a unit base material 22 having a rectangular shape having four corners in a plan view, a side surface reinforcing portion 26 provided on the side surface 22 c of the unit base material 22, and It has.
  • the side reinforcing portion 26 is arbitrarily provided to protect the side surface 22 c of the unit base material 22.
  • the side reinforcing portion 26 is provided so as to surround the side surface 22 c of the unit base material 22 in a plan view. Since the shape of the side reinforcing portion 26 and the side surface 22c of the unit base member 22 is the same as in the case of the first embodiment described above, detailed description thereof is omitted.
  • FIG. 17 is a cross-sectional view taken along line XXVII of the cover glass 20 shown in FIG.
  • FIG. 18 is an enlarged cross-sectional view of the through hole 23 of the cover glass 20 of FIG.
  • the hole reinforcing portion 28 is provided on the wall surface 25 c of the through hole 25 formed in the unit base material 22.
  • the through hole 25 of the unit base material 22 refers to a hole penetrating the unit base material 22 in a state where the hole reinforcing portion 28 is not provided. It means that.
  • the “through hole 23 of the cover glass 20” means that the wall surface 23 c penetrates the cover glass 20, which is constituted by the hole reinforcing portion 28 provided on the wall surface 25 c of the through hole 25 of the unit base material 22. It means a hole to be made.
  • the through hole after the hole reinforcing portion 28 and the coating liquid 27 described later are provided with reference numeral 23. 25 is omitted.
  • the tensile stress layer 24 b of the unit base material 22 reaches the wall surface 25 c of the through hole 25 of the unit base material 22. That is, the tensile stress layer 24 b is exposed on the wall surface 25 c of the through hole 25 of the unit base member 22. For this reason, the wall surface 25c of the through-hole 25 of the unit base material 22 is weak against damages such as cracks as compared with the first surface 22a and the second surface 22b of the unit base material 22.
  • the hole reinforcing portion 28 described above is provided to protect the wall surface 25c of the through hole 25 of the unit base material 22 as described above.
  • the material constituting the hole reinforcing portion 28 for example, a curable resin that is cured by heating or ultraviolet irradiation is used.
  • the hole reinforcing portion 28 has desired fluidity at the time of molding before curing, and the hole reinforcing portion 28 has desired hardness and strength after curing. This makes it possible to achieve both formability, hardness and strength.
  • the material constituting the hole reinforcing portion 28 may contain a polyene-polythiol resin.
  • the hole reinforcing portion 28 includes a first surface 28 a extending laterally from an end portion 22 af of the first surface 22 a of the unit base material 22, and an end portion 22 bf of the second surface 22 b of the unit base material 22. And a side surface 28c extending between the first surface 28a and the second surface 28b.
  • the first surface 28 a of the hole reinforcing portion 28 is located on the same plane as the first surface 22 a of the unit base member 22.
  • the second surface 28 b of the hole reinforcing portion 28 is located on the same plane as the second surface 22 b of the unit base member 22.
  • the steps 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 are each 10 ⁇ m or less. For this reason, the same advantage as the case of the reinforcement part 26 in 1st Embodiment can be acquired. For example, ensuring the strength of the through-hole 23 of the cover glass 20 and ensuring the design of the cover glass 20 can both be achieved.
  • the side surface 28c of the hole reinforcing portion 28 will be described.
  • the inner end portion of the first surface 28 a of the hole reinforcing portion 28 is represented by reference numeral 28 ae
  • the inner end portion of the second surface 28 b of the hole reinforcing portion 28 is represented by reference numeral 28 be. Yes.
  • the first surface 28a and the second surface 28b of the hole reinforcing portion 28 are the same 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. It may spread on a plane.
  • the first surface 28a and the second surface 28b of the hole reinforcing portion 28 are ends on the same plane as the first surface 22a and the second surface 22b of the unit base member 22 over a predetermined distance, for example, at least 300 ⁇ m. It may extend from the portion 22af and the end portion 22bf to the side and then bend or bend. Note that “on the same plane” means that, as in the case of the above-described step, the first and second surfaces 28a and 28b of the hole reinforcing portion 28 extend laterally from the end 22af and the end 22bf over at least 300 ⁇ m. This means that the distance in the thickness direction of the unit base material 22 between the portion and the first surface 22a and the second surface 22b of the unit base material 22 is 10 ⁇ m or less.
  • the wall surface 25c of the through hole 25 of the unit base member 22 includes a first wall surface 25d and a second wall surface 25e.
  • the first wall surface 25 d intersects with the first surface 22 a of the unit base material 22, and spreads toward the center side of the through hole 25 toward the second surface 22 b side of the unit base material 22.
  • the second wall surface 25e intersects the second surface 22b of the unit base member 22, expands toward the center of the through hole 25 toward the first surface 22a side of the unit base member 22, and joins the first wall surface 25d. ing.
  • the hole reinforcing portion 28 sandwiches the wall surface 25 c of the unit base material 22, the hole reinforcing portion 28 can be firmly adhered to the wall surface 25 c of the through hole 25 of the unit base material 22.
  • the first wall surface 25d and the second wall surface 25e having such a shape are the same as the first side surface 22d and the second side surface 22e of the side surface 22c, and the first surface 22a side and the second surface 22b of the unit base material 22. It is obtained by wet etching the unit base material 22 from both sides to form the through hole 25.
  • the covering dimension of the hole reinforcing portion 28 is the length of the hole reinforcing portion 28 in the direction along the normal direction of the side surface 28c, as in the case of the reinforcing portion 26 of the first embodiment described above. That is.
  • the minimum value Tmin and the maximum value Tmin of the covering dimension of the hole reinforcing portion 28 can be set in the same range as in the case of the reinforcing portion 26 of the first embodiment described above.
  • the thickness of the cover glass 20 (that is, the thickness of the unit base member 22, the thickness of the side reinforcing portion 26, and the thickness of the hole reinforcing portion 28) is appropriately set according to the required strength, the area of the cover glass 20, and the like. For example, it is in the range of 0.1 mm to 1 mm.
  • FIGS. 19A to 19D (a), (b) and (c) a unit laminate 35 having a unit substrate 22 and protective films 81 and 82 is formed using a substrate 30 made of large tempered glass.
  • the process to form is demonstrated.
  • FIG. 19A, FIG. 19B, FIG. 19C (a), and FIG. 19D (a) are sectional drawings which show the base material 30 in this process.
  • FIG. 19D (b) is an enlarged cross-sectional view showing the vicinity of the side surface 22c of the unit base material 22 of the unit laminate body 35 shown in FIG. 19D (a).
  • FIG. 19D (c) is the same as FIG. 19D (a).
  • FIG. 19C (b) is a plan view showing a case where the substrate 30 shown in FIG. 19C (a) is viewed from above.
  • a base material 30 made of large tempered glass is prepared.
  • 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.
  • the compressive stress layer 24a is formed on the first surface 30a, the second surface 30b, and the side surface 30c of the base material 30, and the tensile stress layer 24b exists inside the compressive stress layer 24a. is doing.
  • the entire surface of the base material 30 is formed by the compressive stress layer 24a.
  • a protective film forming step is performed in which the first protective film 81 and the second protective film 82 are provided in a predetermined plurality of sections on the first surface 30a and the second surface 30b of the base material 30.
  • a first protective film 81 is provided on the first surface 30 a of the base material 30, and a second protective film 82 is provided on the second surface 30 b of the base material 30.
  • 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.
  • the 1st protective film 81 and the 2nd protective film 82 which were provided over the whole region of the 1st surface 30a and the 2nd surface 30b are set for every division of the base material 30.
  • the protective films 81 and 82 are divided into two rows in the first surface 30a of the substrate 30 in two rows in the vertical direction of the paper surface and in three columns in the horizontal direction of the paper surface. Divide every 6 sections. As a result, a gap 81a and a gap 82a are formed in the first protective film 81 and the second protective film 82 along the boundaries between the sections.
  • the dimension of each section corresponds to the dimension of each unit substrate 22 obtained by cutting the substrate 30. In the present application, each section of the base material 30 before being cut may be expressed as a “unit 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 at a position corresponding to the through hole 25 of the unit base material 22. To do.
  • the specific method for forming the gaps 81a and 82a and the holes 81b and 82b in the protective films 81 and 82 is not particularly limited, and various methods can be adopted.
  • unnecessary portions (portions that become gaps and holes) of the first protective film 81 may be removed using a mold having a shape corresponding to the shape of the first protective film 81 shown in FIG. 19C (b).
  • unnecessary portions (portions that become gaps and holes) of the second protective film 82 can be removed by using a mold having a shape corresponding to the mold for the second protective film 82.
  • unnecessary portions of the first protective film 81 and the second protective film 82 may be removed using laser processing.
  • the base material 30 is cut along the gaps 81a and 82a between the protective films 81 and 82 provided in each section of the base material 30 and the base material 30 (unit base material 22).
  • the base material processing process which forms the through-hole 25 is implemented. Specifically, from the first surface 30a side and the second surface 30b side of the base material 30, by performing an etching process of wet etching the base material 30 using the first protective film 81 and the second protective film 82 as a resist The substrate 30 is cut and the through hole 25 is formed.
  • the etching solution hydrofluoric acid or the like is used as described above. Accordingly, as shown in FIG.
  • FIG. 19D (b) is an enlarged cross-sectional view showing the vicinity of the side surface 22c of the unit base material 22 of the unit laminate body 35 shown in FIG. 19D (a).
  • the first side surface 22d crosses the end 22ae and spreads outward as it goes to the second surface 22b side, and crosses the end 22be and goes to the first surface 22a side.
  • a second side surface 22e extending outward is obtained.
  • FIG. 19D (c) is an enlarged cross-sectional view showing the vicinity of the through hole 25 of the unit base material 22 of the unit laminate body 35 shown in FIG.
  • the wall surface 81d of the hole 81b of the first protective film 81 is located closer to the center side of the through hole 25 of the unit base material 22 than the wall surface 25c of the through hole 25 of the unit base material 22. is doing.
  • the wall surface 82 d of the hole 82 b of the second protective film 82 is located closer to the center side of the through hole 25 of the unit base material 22 than the wall surface 25 c of the through hole 25 of the unit base material 22.
  • Such a relationship between the through hole 25 of the unit base material 22 and the first protective film 81 and the second protective film 82 is similar to the case of the side surface 22c described above, and the first surface 22a of the unit base material 22 and This is realized by forming the through holes 25 in the unit base material 22 by etching from both the second surfaces 22b.
  • the coating liquid 27 is filled into 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. May be.
  • the side reinforcing portion 26 can be provided on the side surface 22 c of the unit base member 22 of the unit laminate body 35.
  • the second sealing member 85 that seals the through hole 25 of the unit base material 22 and the hole 82b of the second protective film 82 from below on the second surface 22b side of the unit base material 22 Arranged on the protective film 82.
  • the material constituting the sealing member 85 is not particularly limited.
  • the sealing member 85 can be configured using a resin film or the like.
  • a hole coating step is performed in which a coating liquid 27 containing a resin material is applied to the wall surface 25 c of the through hole 25 of the unit base material 22.
  • a coating liquid 27 containing a resin material is applied to the wall surface 25 c of the through hole 25 of the unit base material 22.
  • the coating liquid 27 is applied in the sealed space.
  • the coating liquid 27 is applied in a space surrounded by the sealing member 85, the second protective film 82, the wall surface 25 c of the through hole 25, and the first protective film 81.
  • the coating liquid 27 is applied in the sealed space until the coating liquid 27 comes at least partially in contact with the bottom surface 81e (the surface on the unit base material 22 side) of the first protective film 81.
  • the coating liquid 27 may be applied until the first protective film 81 overflows.
  • the upper surface of the hole reinforcing portion 28 to be formed later may be leveled by scraping the coating liquid 27 overflowing on the first protective film 81 with a squeegee or the like.
  • a hole curing step for curing the coating liquid 27 provided on the wall surface 25c of the through hole 25 of the unit base material 22 is performed.
  • the coating liquid 27 is cured by irradiating the coating liquid 27 with light such as ultraviolet rays.
  • the hole reinforcing portion 28 made of the resin material contained in the coating liquid 27 is formed so as to close the through hole 25 of the unit base material 22.
  • a resin material processing step of processing the hole reinforcing portion 28 to form the through hole 23 in the hole reinforcing portion 28 is performed.
  • the method of processing the hole reinforcing portion 28 is not particularly limited. For example, machining using a drill or the like, laser processing, or the like can be appropriately employed.
  • 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.
  • the hole reinforcing portion 28 is processed so that the hole reinforcing portion 28 remains on the wall surface 81d of the first protective film 81 and the wall surface 82d of the second protective film 82. It is not limited to this.
  • the hole reinforcing portion 28 may be processed so that the hole reinforcing portion 28 does not remain on the wall surface 81d of the first protective film 81 and the wall surface 82d of the second protective film 82. .
  • the first protective film 81 on the first surface 22a of the unit base 22 and the second protective film 82 on the second surface 22b of the unit base 22 are removed. Accordingly, as shown in FIG. 18, it is possible to obtain the cover glass 20 in which the hole reinforcing portion 28 is provided on the wall surface 25 c of the through hole 25 of the unit base material 22.
  • the hole reinforcing portion 28 made of a curable resin is provided on the wall surface 25 c of the through hole 25 of the unit base material 22. For this reason, when an impact is applied to the cover glass 20, the force transmitted to the through hole 25 of the unit base material 22 is alleviated by the hole reinforcing portion 28, and damage such as cracks occurs on the wall surface 25 c of the through hole 25. Can be suppressed. Accordingly, even if the 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 increased.
  • the exposed tensile stress layer 24b can be covered by the hole reinforcing portion 28, so The impact resistance of the cover glass 20 can be made sufficiently high.
  • the coating liquid 27 for constituting the hole reinforcing portion 28 is a bottom surface 81e of the first protective film 81 projecting from the first surface 22a of the unit base member 22 toward the center of the through hole 25, And it applies so that it may touch both the bottom face 82e of the 2nd protective film 82 which protruded from the 2nd surface 22b of the unit base material 22 to the center side of the through-hole 25.
  • the positions of the surfaces 28a and 28b of the hole reinforcing portion 28 are determined according to the positions of the bottom surfaces 81e and 82e of the protective films 81 and 82 in contact with the first surfaces 22a and 22b. For this reason, as shown in FIGS.
  • the external conductor such as a finger
  • the coating liquid 27 when the coating liquid 27 is applied to the wall surface 25 c of the through hole 25 of the unit base material 22, the through hole 25 and the second hole of the unit base material 22 on the second surface 22 b side of the unit base material 22.
  • a sealing member 85 for sealing the hole 82b of the protective film 82 from below is disposed. For this reason, it is possible to prevent the coating liquid 27 from leaking out.
  • the through hole 23 of the cover glass 20 is machined using a drill or the like on the hole reinforcing portion 28 made of a resin material provided so as to close the through hole 25 of the unit base material 22. It is obtained by applying laser processing or the like.
  • the accuracy of the shape of the through hole 23 is determined according to the processing accuracy of the hole reinforcing portion 28.
  • the substrate 30 can be cut and the through hole 25 can be formed simultaneously by performing the above-described etching process.
  • both the side reinforcing part 26 and the hole reinforcing part 28 can be efficiently formed. .
  • the cover glass 20 in which both the side surface 20c and the through hole 23 are appropriately protected can be manufactured with a small number of man-hours.
  • the present invention is not limited to this, and as shown in FIG. 21A, the first protective film 81 is formed so that the hole 81b is formed in the first protective film 81 but the hole is not formed in the second protective film 82.
  • a second protective film 82 may be provided.
  • the above-described gap 82 a is formed in the second protective film 82 between the sections on the base material 30.
  • the substrate 30 is wet-etched using the first protective film 81 and the second protective film 82 shown in FIG. 21A as resists.
  • the unit base material 22 is wet-etched from the first surface 22a side using the first protective film 81 as a resist at the place where the through hole 25 is formed.
  • the wall surface 25c of the through hole 25 of the unit base member 22 intersects the first surface 22a of the unit base member 22 and goes toward the second surface 22b of the unit base member 22. 25 spreads to the center side and intersects the second surface 22b.
  • the through hole 25 is sealed by the second protective film 82 on the second surface 22 b side of the unit base material 22.
  • a hole coating step of coating the coating liquid 27 in the sealed space is performed.
  • the coating liquid 27 is applied in a space surrounded by the second protective film 82, the wall surface 25 c of the through hole 25, and the first protective film 81.
  • a hole curing step is performed in which the coating liquid 27 is cured to obtain the hole reinforcing portion 28.
  • a resin material processing step for forming a through hole 23 in the hole reinforcing portion 28 is performed on the hole reinforcing portion 28 by machining or laser processing using a drill or the like. To do.
  • the first protective film 81 on the first surface 22a of the unit base 22 and the second protective film 82 on the second surface 22b of the unit base 22 are removed.
  • 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.
  • the role of the second protective film 82 provided on the second surface 22b of the unit base member 22 to prevent the coating liquid 27 from leaking out that is, in the above-described second embodiment. It can serve as a sealing member 85. Therefore, the process of providing the sealing member 85, the process of removing the sealing member 85, and the like can be reduced compared to the case of the second embodiment described above. For this reason, 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 with fewer man-hours.
  • the wall surface 25c of the through hole 25 of the unit base material 22 has a shape that expands toward the center side of the through hole 25 from the first surface 22a side of the unit base material 22 toward the second surface 22b side.
  • the shape of the wall surface 25c is for holes in which one of the end portion 28ae on the first surface 28a side or the end portion 28be on the second surface 28b side is scraped off, as in a sixth modification described later. High compatibility with the reinforcing portion 28.
  • the hole 81b is formed in the first protective film 81, but the hole is not formed in the second protective film 82, but the present invention is not limited to this.
  • a hole is formed in the second protective film 82, but the first protective film 81 and the second protective film 82 may be provided so that no hole is formed in the first protective film 81.
  • the wall surface 25c of the through hole 25 of the unit base member 22 is, as shown in FIG. 29 described later, the center side of the through hole 25 from the second surface 22b side of the unit base member 22 toward the first surface 22a side. It has a shape that spreads out.
  • FIG. 23A is a cross-sectional view showing the unit base material 22 in which the through holes 25 are formed by machining or laser processing without using the first protective film 81 or the protective films 81 and 82.
  • microcracks may be generated around the through hole 25.
  • the micro cracks may be removed by wet etching around the through holes 25.
  • the sealing member 85 that seals the through hole 25 of the unit base member 22 is used as the second base member 22 as shown in FIG. 23B. Provided on the surface 22b. Thereafter, as shown in FIG. 24A, a hole coating step of coating the coating liquid 27 in the sealed space is performed.
  • the coating liquid 27 may be applied to the extent that it does not overflow on the first surface 22 a of the unit base member 22. In this case, a step of scraping off the coating liquid 27 using a squeegee or a step of cleaning the first surface 22a contaminated by the coating liquid 27 can be made unnecessary.
  • the coating liquid 27 is applied so as to cover at least the tensile stress layer 24 b exposed on the wall surface 25 c of the through hole 25.
  • the tensile stress layer 24b exposed on the wall surface 25c can be covered with the hole reinforcing portion 28, whereby the through hole 25 can be more reliably protected. More preferably, as shown in FIG.
  • the coating liquid 27 is applied so that the first surface 22a of the unit base member 22 and the surface of the coating liquid 27 are connected without a step by the surface tension acting on the coating liquid 27.
  • the coating liquid 27 may be applied to such an extent that it overflows onto the first surface 22a of the unit base material 22, although not shown. In this case, the coating liquid 27 overflowing on the first surface 22a of the unit base member 22 is scraped off using a squeegee or the like. Thereby, the position of the surface of the coating liquid 27 can be matched with the position of the first surface 22 a of the unit base material 22.
  • a hole hardening step for hardening the coating liquid 27 to obtain the hole reinforcing portion 28 is performed.
  • a resin material processing step of processing the hole reinforcing portion 28 to form the through hole 23 in the hole reinforcing portion 28 is performed. Accordingly, 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.
  • 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 onto the wall surface 25c of the through hole 25 is shown.
  • the first protective film 81 or the like as in the case of the above-described embodiment or the first modification example, The hole reinforcing portion 28 may be formed by applying the coating liquid 27 using the protective films 81 and 82.
  • the unit base material 22 in which the through holes 25 are formed by machining or laser processing is prepared, and then, as shown in FIG. 25A, on the first surface 22a and the second surface 22b of the unit base material 22.
  • a first protective film 81 and a second protective film 82 are provided with a first protective film 81 and a second protective film 82, respectively.
  • a hole 81 b is formed at a position corresponding to the through hole 25 in the first protective film 81.
  • the wall surface 81 d of the hole 81 b of the first protective film 81 is located closer to the center of the through hole 25 of the unit base material 22 than the wall surface 25 c of the through hole 25 of the unit base material 22. In this case, preferably, as shown in FIG.
  • the coating liquid 27 is applied in the sealed space until the coating liquid 27 comes into contact with the bottom surface 81e of the first protective film 81 at least partially.
  • the reinforcing portion 28 can be formed.
  • the wall surface 25c of the through hole 25 of the unit base material 22 has a convex shape protruding toward the center of the through hole 25 of the unit base material 22 has been described.
  • the present invention is not limited to this, and 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. Even in this case, the through hole 25 can be appropriately protected by forming the hole reinforcing portion 28 on the wall surface 25c of the through hole 25 as in the case of the second embodiment described above. .
  • the hole reinforcing portion 28 is obtained by curing the coating liquid 27, and then the side surface 28c of the hole reinforcing portion 28 is processed to obtain the hole reinforcing portion.
  • the shape of the side surface 28c of 28, that is, the shape of the wall surface 23c of the through hole 23 of the cover glass 20 may be adjusted. Thereby, the appearance of the through-hole 23 can be improved.
  • the hole reinforcing portion 28 is formed of the resin material as described above, the cover glass 20 penetrates more than the case where the wall surface 23c of the through hole 23 of the cover glass 20 is formed of tempered glass. It is easier to process the wall surface 23c of the hole 23 to obtain a desired shape. In addition, strength reduction and microcracks are less likely to occur due to processing.
  • a processing method for example, processing using a polishing machine can be employed.
  • the side surface 28c of the hole reinforcing portion 28 is processed so that both 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 are scraped off. May be.
  • both 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 round surfaces.
  • FIG. 28 shows an example in which the side surface 28c is processed so that the side surface 28c becomes a round surface.
  • the present invention is not limited to this, and although not shown, the side surface 28c becomes a square surface. 28c may be processed.
  • a portion of the side surface 28c of the hole reinforcing portion 28 that intersects the second surface 28b is processed into a round surface.
  • the side surface reinforcing portion 26 provided on the side surface 22c of the unit base member 22 may be similarly processed with a round surface. In this case, an impression that the second surface 20b side of the cover glass 20 is rounded over a wide area can be given.
  • the coating liquid 27 is placed in the space sealed by the second protective film 82 or the sealing member 85 provided on the second surface 22b of the unit base member 22.
  • An example in which is applied is shown.
  • the coating liquid 27 having high viscosity is used, the coating liquid 27 may be applied onto the wall surface 25c of the through hole 25 of the unit base material 22 without forming such a sealed space.
  • the unit laminated body 35 is held so that the through hole 25 extends in the vertical direction, and is surrounded by the wall surface 25 c of the through hole 25, the first protective film 81, and the second protective film 82.
  • the coating liquid 27 may be applied in the remaining space.
  • the coating liquid 27 may be applied on the wall surface 25 c of the through hole 25 without providing the first protective film 81 and the second protective film 82. Even in these cases, if the coating liquid 27 has sufficient viscosity, the coating liquid 27 stays on the wall surface 25c of the through hole 25, so that the hole reinforcing portion 28 is formed on the wall surface 25c. Can do.
  • the coating liquid 27 can be applied on the wall surface 25c so as not to block the through hole 25 of the unit base member 22. For this reason, the hole reinforcement part 28 in which the through-hole 23 was formed can be obtained, without implementing the above-mentioned resin material processing process.
  • the viscosity of the coating liquid 27 used in this modification is set so that the coating liquid 27 can remain on the wall surface 25c until the coating liquid 27 is cured.
  • the viscosity of the coating liquid 27 is in the range of 20 to 50 Pa ⁇ s.
  • the cover glass 20 is configured to perform not only a role of protecting the display device 15 but also a touch panel function
  • the first surface 20a on the display device 15 side of the cover glass 20 includes a sensor electrode for detecting the approach or contact of the external conductor, as in the case of the first embodiment described above.
  • a touch panel sensor unit 40 is provided.
  • the non-active area Aa2 of the first surface 20a of the cover glass 20 may be further provided with a decorating unit 60 for exhibiting a desired color.
  • FIG. 32 is a diagram illustrating the touch panel sensor unit 40 provided on the first surface 20 a of the cover glass 20. In FIG. 32, the decorating unit 60 is omitted for convenience of explanation.
  • FIG. 32 is a plan view showing the cover glass 20 as viewed from the first surface 20a side.
  • the decorating unit 60 is omitted for convenience of explanation. Since the configuration of the touch panel sensor unit 40 is the same as the configuration of the touch panel sensor unit 40 in the first embodiment described above, detailed description thereof is omitted.
  • 33 and 34 are cross-sectional views taken along line XXXIII and line XXXIV of cover glass 20 shown in FIG. 32, respectively.
  • the decoration portion 60 is arranged so as to be positioned closer to the observer side than the extraction wiring 43.
  • the decoration part 60 is visually recognized through the cover glass 20 from the observer side. That is, in the display device 10 with the cover glass, the appearance of the inactive area Aa2 is determined by the decorating unit 60 and its peripheral components.
  • the color of the decoration part 60 is selected according to the design property calculated
  • FIG. 34 shows an example in which the decorative portion 60 is provided so as to overlap the side reinforcing portion 26 and the hole reinforcing portion 28 when viewed along the normal direction of the cover glass 20.
  • the decorative portion 60 may be provided so as not to overlap the side reinforcing portion 26 and the hole reinforcing portion 28 when viewed along the normal direction of the cover glass 20.
  • the side reinforcing portion 26 and the hole reinforcing portion 28 may partially overlap the decorating portion 60 when viewed along the normal direction of the cover glass 20.
  • the element part formation process which forms the element parts 70 is implemented.
  • the timing of performing the element part forming step is no particular limitation on the timing of performing the element part forming step, and various variations are conceivable.
  • the element part forming step may be performed prior to the above-described protective film forming step in which the first protective film 81 and the second protective film 82 are provided on the substrate 30.
  • the first protective film 81 not only serves to protect the first surface 30a of the base material 30 during the etching process, but also includes the element portion 70 provided on the first surface 30a of the base material 30. It will also play a role of protection.
  • the element 30 is provided on the first surface 22a of the unit base material 22 after the base material 30 is wet-etched by using the first protective film 81 and the second protective film 82 as resists to obtain the unit base material 22.
  • the step of applying the coating liquid 27 to form the side reinforcing portion 26 and the hole reinforcing portion 28 may be performed prior to the element portion forming step or after the element portion forming step. May be.
  • the side reinforcing part 26 and the hole reinforcing part 28 are configured to exhibit the same color as the decorative part 60.
  • the side reinforcing portion 26 and the hole reinforcing portion 28 may include a color pigment having the same color as the color pigment included in the decorative portion 60.
  • an area of the side reinforcing part 26 and the hole reinforcing part 28 that does not overlap with the decorative part 60 when viewed from the normal direction of the cover glass 20 is visually recognized as an area of the same color as the decorative part 60. become. For this reason, the area
  • the decorating unit 60 is formed by applying a coating liquid containing a resin material and a pigment on the unit base material 22.
  • the coating liquid to the vicinity of the side surface 22c of the unit base member 22 and the vicinity of the wall surface 25c of the through hole 25.
  • the decorative part 60 is provided to the vicinity of the side surface 22c of the unit base member 22 and the wall surface 25c of the through hole 25.
  • the design effect can be produced in the vicinity of the side surface 22c of the unit base member 22 and the region in the vicinity of the wall surface 25c of the through hole 25. For this reason, the difficulty required for the process of providing the decorating part 60 can be reduced.
  • the cover glass 20 includes the touch panel sensor unit 40 but may not include the decorating unit 60.
  • the cover glass 20 includes the decorating unit 60 but may not include the touch panel sensor unit 40.
  • the color of the side reinforcing part 26 and the hole reinforcing part 28 is the same as the color of the decorative part 60.
  • the present invention is not limited to this, and the side reinforcing part The part 26 and the hole reinforcing part 28 may be configured to exhibit a color different from that of the decorative part 60.
  • the side reinforcement part 26 and the hole reinforcement part 28 may be configured to exhibit a predetermined color. In this case, even if the decorative portion 60 is not provided, the side face reinforcing portion 26 and the hole reinforcing portion 28 can improve design such as prevention of light leakage.
  • a transparent conductive material having translucency is used as a material constituting the sensor electrodes 41 and 42 of the touch panel sensor unit 40 .
  • a so-called mesh sensor type composed of fine metal wires in which an impermeable conductive material such as a silver alloy or copper is arranged in a mesh shape may be employed.
  • the through hole 25 of the unit base member 22 is sealed in a state where it is sealed by the second protective film 82 or the sealing member 85 on the second surface 22b side.
  • the coating liquid 27 is applied in the space.
  • the present invention is not limited to this, and as long as the coating liquid 27 can remain on the wall surface 25c of the through hole 25 until the coating liquid 27 is cured, the through hole 25 is firmly sealed on the second surface 22b side. There is no need to be.
  • the coating liquid 27 applied from the first surface 22a side may leak from the second surface 22b side through the through hole 25.
  • the through hole 25 is firmly sealed on the second surface 22b side.
  • the first protective film 81 and the second protective film 82 are formed after the resin material processing step for forming the through hole 23 by processing the hole reinforcing portion 28 is performed.
  • the present invention is not limited to this, and the first protective film 81 and the second protective film 82 may be removed before the resin material processing step is performed.
  • the resin material It can be said that it is preferable to remove the first protective film 81 and the second protective film 82 after performing the processing steps.
  • the side reinforcing portion 26 and the hole reinforcing portion 28 may be configured to suppress the cover glass 20 from being charged.
  • the side reinforcing part 26 and the hole reinforcing part 28 may contain conductive particles. Thereby, it can suppress that the side reinforcement part 26, the hole reinforcement part 28, and the unit base material 22 are charged, and it can suppress that electrostatic breakdown arises by this.
  • the conductive particles added to the side reinforcing portion 26 and the hole reinforcing portion 28 include 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 ⁇ / ⁇ .
  • a filler may be added to the resin material contained in the coating liquid 27 in order to reduce shrinkage when the coating liquid 27 is cured. Since the filler has a smaller degree of shrinkage due to heat than the resin material, by adding the filler, the coating liquid 27 is cured to form the entire side reinforcing portion 26 or hole reinforcing portion 28. The degree of shrinkage can be reduced. Examples of the filler include carbon black particles. If a filler is added, the light is blocked by the filler, which hinders the polymerization reaction of the photocurable resin, and it is considered that the curing does not proceed sufficiently. In consideration of such problems, a thermosetting resin may be further added to the resin material included in the coating liquid 27.
  • the protective films 81 and 82 are configured by sticking a biaxially stretched polypropylene sheet or an unstretched polypropylene sheet to the base material 30 through the adhesive layer are shown.
  • the method for forming the protective films 81 and 82 is not particularly limited.
  • a photosensitive resist film is bonded to each of the first surface 30a and the second surface 30b of the substrate 30, and then the photosensitive resist film is irradiated with ultraviolet rays or the like according to a desired shape using a photomask or the like.
  • the protective films 81 and 82 can be provided on the substrate 30 by irradiating light and patterning with a developing solution such as an acidic solution, an alkaline solution, or an organic solvent.
  • Example 1 The reinforcing portion 26 was formed on the side surface 22c of the unit base material 22 using the method shown in FIGS. 7A to 7D described above.
  • a material for constituting the reinforcing portion 26 three kinds of materials such as an acrylic resin, an epoxy resin, and a polyene-polythiol resin were used.
  • UV-3300 manufactured by Toagosei Co., Ltd. was used as the acrylic resin.
  • TB3114 manufactured by ThreeBond Co., Ltd. was used.
  • the polyene-polythiol resin Photorec A-784 manufactured by Sekisui Chemical Co., Ltd. was used.
  • three unit base materials 22 provided with the first protective film 81 and the second protective film 82 were prepared.
  • the unit base material 22 a surface of 0.7 mm thick aluminosilicate glass provided with a 24 ⁇ m thick compressive stress layer by chemical strengthening was used.
  • the coating liquid 27 containing any one of the above-described three types of resins was applied to the side surface 22c of the unit base material 22, respectively. Thereafter, the coating liquid 27 was cured by irradiating light to the coating liquid 27, thereby obtaining the reinforcing portion 26.
  • the viscosity of the coating liquid 27 and the conditions for curing the coating liquid 27 the conditions recommended by the material manufacturer that provides the resin material contained in the coating liquid 27 were adopted.
  • the side face 26c of the obtained reinforcing part 26 was touched with a hand to evaluate whether or not it was sticky. As a result, no stickiness was felt with respect to the reinforcing portion 26 composed of the epoxy resin and the polyene-polythiol resin. On the other hand, stickiness was felt with respect to the reinforcing portion 26 made of acrylic resin.
  • the side surface 26c of the reinforcing portion 26 is a portion that is exposed to an external environment such as the atmosphere when cured. Therefore, when the acrylic resin is used, it is considered that the polymerization reaction is inhibited by oxygen, and as a result, the side surface 26c of the reinforcing portion 26 remains uncured. On the other hand, the degree to which the polymerization reaction of the polyene-polythiol resin is inhibited by oxygen is smaller than that of the acrylic resin. For this reason, it is considered that the reinforcing portion 26 made of the polyene-polythiol resin could prevent the side surface 26c from sticking.
  • Example 2 The printability of the above-mentioned three types of resins used in Example 1 was evaluated. Specifically, first, as shown in FIG. 36A, a glass plate 90 was prepared. Next, as shown in FIG. 36 (b), a coating liquid containing any of the above-mentioned three types of resins is applied on the glass plate 90, and then the coating liquid is cured, whereby the glass plate 90 is coated. A resin layer 91 was formed. Next, as shown in FIG. 36 (c), printing patterns 92a to 92f are provided on the resin layer 91 by printing a plurality of types of ink set to have different surface tensions on the resin layer 91. .
  • the printing patterns 92a to 92f are respectively constituted by ink having a surface tension of 32, 34, 36, 38, 40, and 42 mN / m.
  • a set of # 32, 34, 36, 38, 40, 42 of “JUMBO SURFACE TENSION TEST PENS” manufactured by Corona Supplies Ltd. was used as a means for printing such an ink on the resin layer 91.
  • the number after # represents the surface tension (unit: mN / m) of the ink contained in the pen.
  • FIG. 36D shows an example of the state of the print patterns 92a to 92f after one hour has elapsed.
  • the ink is repelled from the base (here, the resin layer 91), and as a result, the printing pattern is likely to be disturbed. That is, in the print patterns 92a to 92f shown in FIG. 36, the pattern located on the right side, that is, the pattern on the print pattern 92f side, is easily repelled from the resin layer 91 and disturbed.
  • the resin layer 91 has printability for the print patterns 92a to 92d (pattern with a surface tension of 32 to 38 mN / m), but the print patterns 92e and 92f (surface tension) Is 40, 42 mN / m pattern).
  • Table 1 shows the evaluation results of printability.
  • ⁇ means that the printing pattern made of ink was not disturbed (ink repelling)
  • x means that ink repelling occurred.
  • the resin layer 91 composed of an acrylic resin and a polyene-polythiol resin had printability for ink having a surface tension of 32 to 42 mN / m.
  • the resin layer 91 made of an epoxy resin has printability for ink having a surface tension of 32 mN / m, but has printability for ink having a surface tension of 34 to 42 mN / m. It wasn't.
  • the polyene-polythiol-based resin prevents the pattern from being disturbed by repelling the coating liquid even when the surface tension of the coating liquid such as ink applied thereon is large. Can do. Therefore, when a component such as the second decorative portion 62 is provided on the first surface 26a of the reinforcing portion 26, it can be said that the reinforcing portion 26 is preferably configured using a polyene-polythiol resin.
  • Example 3 The impact resistance of epoxy resins and polyene-polythiol resins was evaluated. Specifically, first, in the same manner as in Example 1, cover glasses 20 each having a reinforcing portion 26 made of an epoxy resin and a polyene-polythiol resin were produced. For comparison, a cover glass 20 without the reinforcing portion 26 was produced. Next, as shown in FIG. 37, impact was applied to the side surface 20 c of the cover glass 20 using the striking means 94. When the reinforcing portion 26 is provided, the side surface 20 c of the cover glass 20 is configured by the side surface 26 c of the reinforcing portion 26.
  • a round bar made of stainless steel (SUS) having a length of 35 cm and having a predetermined diameter was used.
  • tests were performed using SUS round bars having diameters of 0.50, 0, 75, 1.00, and 1.25 cm, respectively.
  • SUS stainless steel
  • the cover glass 20 and the striking means 94 supported by the supporting means 95 are placed on the placing table 97.
  • the cover glass 20 is placed so that the side surface 20c faces upward.
  • the support means 95 rotates the striking means 94 over 90 ° about the other end 94b until the one end 94a of the striking means 94 changes from a state in which the one end 94a faces directly upward to a state in which the one end 94a of the striking means 94 is rotated.
  • the other end 94b of the striking means 94 is supported so as to collide with the side surface 20c of the cover glass 20. In this case, collision energy determined by the length and diameter of the striking means 94 can be accurately applied to the side surface 20 c of the cover glass 20.
  • the 1st surface 20a and the 2nd surface 20b of the cover glass 20 are hold
  • Means 96 may be provided.
  • the hardness of the epoxy resin is excessively high as the hardness of the material for constituting the reinforcing portion 26 of the cover glass 20 and is therefore brittle. For this reason, when an impact is applied to the side surface 20c of the cover glass 20 using the striking means 94, the reinforcing portion 26 is at least partially broken, and as a result, sufficient bending strength of the cover glass 20 can be maintained. It is thought that it was not possible.
  • the hardness of the polyene-polythiol resin is within an appropriate range, for example, within the range of D50 to D75 as described above. For this reason, the reinforcing portion 26 made of the polyene-polythiol resin can absorb the impact applied from the striking means 94 by elastic deformation. For this reason, it is thought that sufficient bending strength of the cover glass 20 could be maintained even after the impact was applied.
  • Example 4 The above three types of resins used in Example 1 were evaluated for moisture resistance. Specifically, first, in the same manner as in Example 1, the cover glasses 20 each including the reinforcing portion 26 made of the above-described three types of resins were produced. Next, each cover glass 20 was placed in a high temperature and high humidity environment at a temperature of 85 ° C. and a relative humidity of 85% for 240 hours. Thereafter, whether or not a change such as discoloration occurred in the appearance of each cover glass 20 was visually evaluated.
  • the reinforcing portion 26 is sufficiently in close contact with the side surface 22c of the unit base member 22 can be determined by holding the reinforcing portion 26 by hand, or the striking means used in the above-described fourth embodiment with respect to the reinforcing portion 26. Evaluation was performed by applying an impact using 94. 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 for any of the cover glasses 20 provided with the reinforcing portion 26 made of three types of resins.
  • Example 5 The light resistance of the above-mentioned three types of resins used in Example 1 was evaluated. Specifically, first, in the same manner as in Example 1, the cover glasses 20 each including the reinforcing portion 26 made of the above-described three types of resins were produced. Next, each cover glass 20 was irradiated with light using SUNTEST CPS + manufactured by Atlas Material Testing Technology. Thereafter, whether or not a change such as discoloration occurred in the appearance of each cover glass 20 was visually evaluated.
  • the reinforcing portion 26 is sufficiently in close contact with the side surface 22c of the unit base member 22 can be determined by holding the reinforcing portion 26 by hand, or the striking means used in the above-described fourth embodiment with respect to the reinforcing portion 26. Evaluation was performed by applying an impact using 94. 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 for any of the cover glasses 20 provided with the reinforcing portion 26 made of three types of resins.

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Abstract

La présente invention concerne un verre de protection comprenant une partie de renforcement qui présente un degré approprié de résistance et de ductilité. Le verre de protection comporte un substrat unitaire comprenant du verre, et une partie de renforcement qui est prévue sur une surface latérale du substrat unitaire et contient une matière de résine. La matière de résine constituant la partie de renforcement comporte une résine à base de polyène-polythiol qui contient un composé ène et un composé thiol.
PCT/JP2015/053814 2014-02-12 2015-02-12 Verre de protection, dispositif d'affichage comportant un verre de protection et procede de production du verre de protection WO2015122454A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2014024782A JP6260322B2 (ja) 2014-02-12 2014-02-12 カバーガラスの製造方法、カバーガラスおよびカバーガラス付き表示装置
JP2014-024782 2014-02-12
JP2014069994A JP6331127B2 (ja) 2014-03-28 2014-03-28 カバーガラスおよびカバーガラス付き表示装置
JP2014-069994 2014-03-28

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009167086A (ja) * 2007-12-18 2009-07-30 Hoya Corp 携帯端末用カバーガラス及びその製造方法、並びに携帯端末装置
WO2013154034A1 (fr) * 2012-04-10 2013-10-17 旭硝子株式会社 Article en verre renforcé et lamelle couvre-objet à capteur tactile intégré
JP5622133B1 (ja) * 2013-10-25 2014-11-12 大日本印刷株式会社 カバーガラスの製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009167086A (ja) * 2007-12-18 2009-07-30 Hoya Corp 携帯端末用カバーガラス及びその製造方法、並びに携帯端末装置
WO2013154034A1 (fr) * 2012-04-10 2013-10-17 旭硝子株式会社 Article en verre renforcé et lamelle couvre-objet à capteur tactile intégré
JP5622133B1 (ja) * 2013-10-25 2014-11-12 大日本印刷株式会社 カバーガラスの製造方法

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