WO2014050798A1 - Verre de revêtement pour instrument électronique et procédé pour sa fabrication - Google Patents

Verre de revêtement pour instrument électronique et procédé pour sa fabrication Download PDF

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Publication number
WO2014050798A1
WO2014050798A1 PCT/JP2013/075667 JP2013075667W WO2014050798A1 WO 2014050798 A1 WO2014050798 A1 WO 2014050798A1 JP 2013075667 W JP2013075667 W JP 2013075667W WO 2014050798 A1 WO2014050798 A1 WO 2014050798A1
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Prior art keywords
cover glass
thickness
region
glass substrate
coating layer
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PCT/JP2013/075667
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English (en)
Japanese (ja)
Inventor
下川　貢一
Original Assignee
Hoya株式会社
ホーヤ ガラスディスク フィリピン インコーポレーテッド
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Application filed by Hoya株式会社, ホーヤ ガラスディスク フィリピン インコーポレーテッド filed Critical Hoya株式会社
Priority to CN201380044280.XA priority Critical patent/CN104582955B/zh
Priority to JP2014538483A priority patent/JP5913608B2/ja
Publication of WO2014050798A1 publication Critical patent/WO2014050798A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
    • C03C17/32—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with synthetic or natural resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10018—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising only one glass sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/285—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
    • C03C15/02—Surface treatment of glass, not in the form of fibres or filaments, by etching for making a smooth surface
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
    • C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
    • C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2203/00—Other substrates
    • B05D2203/30—Other inorganic substrates, e.g. ceramics, silicon
    • B05D2203/35—Glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2506/00—Halogenated polymers
    • B05D2506/10—Fluorinated polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2571/00—Protective equipment
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/70—Properties of coatings
    • C03C2217/76—Hydrophobic and oleophobic coatings

Definitions

  • the present invention relates to a cover glass for an electronic device used for protecting a display screen of a portable device such as a mobile phone, a portable game machine, a PDA (Personal Digital Assistant), a digital still camera, a video camera, or a slate PC (Personal Computer). And a manufacturing method thereof.
  • a portable device such as a mobile phone, a portable game machine, a PDA (Personal Digital Assistant), a digital still camera, a video camera, or a slate PC (Personal Computer). And a manufacturing method thereof.
  • Touch panel type mobile devices are operated by directly touching the display screen with a finger, so that fingerprints, sebum and other dirt are likely to adhere to the cover glass protecting the display screen. Therefore, it is desirable to prevent or suppress the dirt such as fingerprints from adhering to the cover glass, or to easily wipe off even if dirt such as fingerprints adheres. Therefore, an antifouling coating layer is usually formed on the surface of the cover glass.
  • Patent Document 1 describes that a fluorine-based surface layer is provided on the surface of a cover glass as an antifouling coating layer.
  • As the coating material alkoxysilyl perfluoropolyether is exemplified.
  • the coating treatment is described as being rinsed with a solvent in order to remove the unbonded coating after being applied by immersion, vapor deposition polymerization, spraying, roller and cured.
  • Patent Document 1 describes that by providing a fluorine-based surface layer, a cover glass having antifouling properties (hydrophobic and oleophobic, collectively referred to as both lyophobic) and damage resistance can be obtained. Has been.
  • the cover glass for a touch panel type electronic device is rubbed with a finger for operation, and thus the antifouling coating layer is required to have a slipperiness when touched with a finger.
  • mobile devices such as smartphones that have been widely used in recent years have a longer product life (use period) in terms of software than conventional touch panel portable devices such as PDAs, due to software update functions such as OS. Yes.
  • portable devices are also required to have improved durability during long-term use in terms of hardware.
  • the cover glass for electronic devices is incorporated into electronic devices with the surface exposed, the antifouling coating layer resists the friction of the user's fingers and contacts with various objects, and is antifouling and slippery. Durability is required for long-term performance.
  • the antifouling coating layer of the cover glass for electronic devices is required to have both slipperiness and durability.
  • Patent Document 1 discloses the antifouling property and the damage resistance of the antifouling coating layer, the slipping property is not considered, and the structure satisfying both the slipping property and the durability is also included. Not disclosed. Therefore, only the technique disclosed in Patent Document 1 cannot achieve desired characteristics as an antifouling coating layer.
  • an object of the present invention is to provide a cover glass for an electronic device that can exhibit both the slipperiness and durability of the antifouling coating layer and a method for producing the same.
  • the inventors have intensively studied to solve the above problems, and the inside of the antifouling coating layer of the cover glass for electronic devices is attached to the glass surface and affects the durability, and contributes to slipperiness.
  • the inventors have conceived that both the slipperiness and the durability are exhibited by appropriately forming these regions, and the present invention has been completed.
  • a typical configuration of the cover glass for an electronic device according to the present invention includes a glass substrate and an antifouling coating layer formed on the surface of the glass substrate, and the antifouling coating layer adheres to the surface of the glass substrate. It has an adhesion area and a flow area arranged on the surface of the adhesion area.
  • the adhesion region is a region that remains when immersed in a solvent (for example, immersed in HFE for 1 minute), and the flow region is a region that dissolves when immersed in a solvent.
  • the ratio of the thickness of the adhesion region to the thickness of the antifouling coating layer is preferably 20% to 80%, more preferably 40% to 70%. This is because if the thickness ratio of the adhesion region is less than 20%, the durability cannot be exhibited. Further, if the ratio of the thickness of the adhesion region is more than 80%, the slipping property cannot be exhibited.
  • the thickness of the antifouling coating layer is preferably 3 nm to 30 nm. This is because when the thickness of the antifouling coating layer is less than 3 nm, durability cannot be exhibited. Further, when the thickness of the antifouling coating layer is more than 30 nm, the uniformity of the film thickness cannot be maintained, or the transparency is lowered, so that it does not comply with the request of the portable device.
  • the static friction coefficient of the surface of the flow region is 0.2 to 0.4, the dynamic friction coefficient is 0.1 to 0.3, and the contact angle of water is 100 degrees to 120 degrees. If it is the said range, comfortable slipperiness and antifouling property can be acquired.
  • the antifouling coating layer preferably contains a perfluoropolyether compound having a hydroxyl group at the terminal group. Thereby, it can bond
  • the typical structure of the manufacturing method of the cover glass for electronic devices concerning this invention is a manufacturing method of the cover glass for electronic devices, Comprising: Coating which has antifouling property with respect to a glass substrate creation process and a glass substrate An antifouling coat layer forming step, wherein the antifouling coat layer forming step forms an adhesion region that adheres to the surface of the glass substrate and a flow region that is disposed on the surface of the adhesion region. To do.
  • the thickness of the adhesion region can be set to a desired ratio.
  • the ratio of the thickness of the adhered region to the thickness of the antifouling coating layer is preferably 20% to 80%, more preferably 40% to 70%.
  • the region thickness adjusting step it is preferable to adjust the thickness of the fluidized region by baking, ultraviolet irradiation, or vacuum adjustment by decompression.
  • the thickness of the antifouling coating layer is preferably 3 nm to 30 nm.
  • Another representative configuration of the cover glass for an electronic device according to the present invention is that the surface of the glass substrate is coated with a coating material containing a perfluoropolyether compound having a hydroxyl group as a terminal group on the surface of the glass substrate.
  • An antifouling coating layer having an adhesion area that adheres to the surface and a flow area that is disposed on the surface of the adhesion area is formed.
  • the electronic device cover glass is an external electronic device cover glass that is detachable so as to cover a part of the exterior of the electronic device, the first main surface being a back surface with respect to the first main surface.
  • the part may be provided with a recessed part that is recessed from the end face toward the inside in the surface direction of the second main surface.
  • a glass substrate having the first main surface, the second main surface, and the end surface, and the second main surface, and at least a part of the outer peripheral end of the second main surface is more than the end surface. It is good to provide the sticking part for making a hollow part arrange
  • the depth from the end face of the recess is preferably in the range of 0.1 mm to 0.3 mm. According to the said structure, coexistence of peelability and aesthetics can be aimed at. That is, when the depth from the end face is 0.1 mm or more, the peelability can be further exhibited. When the depth from the end surface exceeds 0.3 mm, dust or the like accumulates in the recessed portion with the passage of time, which may impair the beauty.
  • the glass substrate having the first main surface, the second main surface, and the end surface is provided, and an interposed surface forming at least a part of the recess is formed between the end surface and the second main surface.
  • a part of hollow part can be formed with the structure of a glass substrate. This configuration also makes it easier for the user to hook a nail or the like into this gap, so that the peelability of the electronic device cover glass can be improved.
  • the end face is preferably an inclined face that is inclined so as to taper from the second main surface side toward the first main surface side and forms a straight line or a curve in a sectional view. According to the said structure, a user's finger
  • the electronic device cover glass may be detachable so as to cover the main surface of the exterior cover glass that forms part of the exterior of the electronic device. According to the said structure, it can prevent that a damage
  • the antifouling coating layer forming step it is preferable to perform glass surface modification treatment comprising both planar plasma processing and downstream plasma processing. Thereby, the adhesion stability of the antifouling coating material to the glass substrate can be improved, and the durability of the antifouling coating surface can be remarkably improved.
  • both the slipperiness and durability of the antifouling coating layer can be exhibited.
  • FIG. 11 It is a figure which shows the layer structure of the cover glass for electronic devices of FIG. It is a figure shown about the procedure which forms the cover glass for electronic devices of FIG. It is explanatory drawing about the range which forms the hollow part of FIG. It is a figure which shows the outer peripheral part of the cover glass for electronic devices concerning 3rd Embodiment. It is a figure which shows the other example of the cover glass for electronic devices concerning 3rd Embodiment. It is a figure which illustrates the processing method of the outer peripheral part of the glass substrate of FIG. 11, FIG.
  • a cover glass incorporated in a housing so as to form a part of the exterior of an electronic device will be described as an example of the cover glass for an electronic device.
  • FIG. 1 is a schematic cross-sectional view showing an embodiment of a cover glass for electronic equipment according to the present invention, and shows only a part near the surface in an enlarged manner.
  • the electronic device cover glass 1 according to the present embodiment includes a flat glass substrate 10.
  • An antifouling coating layer 20 is formed on the main surface 12 of the glass substrate 10.
  • the antifouling coating layer 20 has an adhesion region 22 that adheres to the surface of the glass substrate 10 and a flow region 24 that is disposed on the surface of the adhesion region 22.
  • the adhesion region 22 is a region where molecules of the coating material are firmly bonded to a functional group such as a hydroxyl group or a carboxyl group on the surface of the glass substrate.
  • the flow region 24 is a region where the molecular chains of the coating materials are intertwined to maintain the state.
  • the adhesion region 22 and the flow region 24 have the same composition, and there is no difference in appearance by a micrograph or the like. However, the flow region 24 is easily dissolved in the solvent, and the adhesion region 22 is not easily dissolved in the solvent. Therefore, the adhesion region 22 is a region that remains when immersed in a solvent (for example, immersed in HFE for 1 minute), and the flow region 24 can be identified as a region that dissolves when immersed in a solvent.
  • the material of the antifouling coating layer 20 will be described.
  • the display screen is directly touched with a finger to operate, and thus a fingerprint or the like is likely to adhere to the display screen. Therefore, it is desirable to prevent or suppress the fingerprints and the like from adhering to the display screen, or to easily wipe off even if the fingerprints and the like are attached.
  • a material of the antifouling coating layer 20 even if it is directly touched (pressed) with a finger, it prevents or suppresses fingerprints and the like from being attached or makes it easy to wipe off even if fingerprints and other items are attached. It is preferable to select a material having antifouling properties. It is also important to have excellent transparency.
  • a material having a good antifouling property and excellent in transparency a material that lowers the surface energy such as a fluorine resin material (for example, a perfluoropolyether compound) is preferably cited. It is done.
  • a fluorine resin material for example, a perfluoropolyether compound
  • the contact angle of water on the surface of the antifouling coating layer 20 is 100 to 120 degrees, and the contact angle of oil such as hexadecane is preferably 60 to 70 degrees. .
  • the contact angle is a value measured in an atmosphere of 22 ⁇ 2 ° C.
  • the contact angle with water or oil is within the above range, even if it is directly touched (pressed) with a finger, it prevents or suppresses fingerprints and other dirt from being deposited, or fingerprints and other dirt are adhered. Demonstrates good antifouling property that facilitates wiping.
  • the above contact angle is an initial contact angle after the antifouling coating layer is formed, but even if a durability test by sliding steel wool described in the examples below is performed, the decrease in the contact angle is small. Good antifouling property can be maintained.
  • the static friction coefficient on the surface of the antifouling coating layer 20 formed on the main surface 12 of the glass substrate is 0.2 to 0.4, and the dynamic friction coefficient is 0. It is preferably 1 to 0.3. Since the static friction coefficient or the dynamic friction coefficient of the surface of the antifouling coating layer 20 is within the above range, the antifouling coating surface is slippery and has a good feeling when touched with a finger. In the portable device provided with the cover glass, the operability of the touch panel, for example, by the user is good.
  • the glass constituting the glass substrate 10 is preferably amorphous aluminosilicate glass.
  • a glass substrate made of such an aluminosilicate glass has high strength after chemical strengthening and is suitable for a cover glass for electronic devices.
  • an aluminosilicate glass for example, aluminosilicate containing 58 to 75% by weight of SiO2, 4 to 20% by weight of Al2O3, 0 to 10% by weight of Li2O, and 4 to 20% by weight of Na2O as main components. Glass can be used.
  • the thickness of the glass substrate 10 is preferably in the range of, for example, about 0.3 mm to 1.5 mm, and more preferably 0.5 mm to 0 mm, from the viewpoint of meeting the recent market needs for thinner and lighter portable devices.
  • the range is about 7 mm.
  • FIG. 2 is a flowchart of a method for manufacturing a cover glass for electronic equipment according to the present invention
  • FIG. 3 is a plan view showing an example of the shape of a glass substrate
  • FIG. 4 shows the method for manufacturing a cover glass for electronic equipment according to the present invention in order of steps. It is a schematic sectional drawing shown.
  • step S100 First, a large-sized plate glass is cut into a predetermined size by machining or the like to produce a glass substrate 10 for cover glass.
  • a large number (for example, about several tens) of sheet glass having a thickness of, for example, about 0.5 mm manufactured by the downdraw method or the float method is laminated (laminated), and a predetermined size is obtained using a glass cutter. Cut into small pieces. As described above, if the laminated state is cut at a time, the laminated pieces can be shaped at the same time in the next shape processing step, which is advantageous in production.
  • the size of the small piece is determined in consideration of the size of the cover glass of the product plus the margin necessary for the outer shape processing.
  • sheet-like glass materials may be processed one by one.
  • an etching method may be applied to the outer shape processing as a means other than machining.
  • the glass substrate 10 has an outer peripheral end face 10a, a notch 10b, an ear hole 10c, and a key operation hole 10d.
  • Such drilling and outer peripheral shape processing may be machined by sandblasting or the like, or these drilling processing and outer peripheral shape processing may be collectively performed by etching.
  • etching is advantageous for complex shape processing.
  • the sheet-like glass material may be made into small pieces by appropriately setting the dissolution pattern at the time of etching, and the pieces may be made into the shape of the glass substrate 10 shown in FIG. .
  • a chemical strengthening process is performed on the glass substrate 10 after the shape processing.
  • the chemical strengthening treatment method for example, a low-temperature ion exchange method in which ion exchange is performed in a temperature range not exceeding the glass transition temperature, for example, a temperature of 300 to 500 degrees Celsius is preferable.
  • the chemical strengthening treatment is a process in which a molten chemical strengthening salt is brought into contact with a glass substrate, whereby an alkali metal element having a relatively large atomic radius in the chemical strengthening salt and a relatively small atomic radius in the glass substrate.
  • alkali metal nitric acid such as potassium nitrate or sodium nitrate can be preferably used.
  • a chemically strengthened glass substrate is improved in strength and excellent in impact resistance, and thus is suitable for a cover glass used for a portable device that requires impact and pressure and requires high strength.
  • step S102 a glass surface modification treatment is performed on the glass substrate 10 produced as described above.
  • the main surface 12 exposed to the opposite side of the printing surface, that is, the outside of the portable device. Glass surface modification treatment.
  • the planar plasma treatment is a form in which two discharge electrodes are provided at a certain interval, a substrate to be processed is mounted within the interval, and plasma is generated to perform the treatment.
  • a gas used for plasma generation for example, He, Ar, N2 or the like is used as a gas used for plasma generation.
  • a voltage necessary for plasma generation is applied between the two electrodes, and ions ionized in the plasma space are accelerated in this space and collide with the surface of the substrate to be processed.
  • the glass substrate surface is modified so that the skewness (Rsk: skewness) of the contour curve on the glass substrate surface approaches 0, and the unevenness of the uneven shape on the glass substrate surface is reduced.
  • Rsk is preferably in the range of 0 ⁇ 0.3, more preferably in the range of 0 ⁇ 0.15.
  • the downstream type plasma processing means that a voltage required for plasma generation is applied between two electrodes arranged opposite to each other so as to sandwich a gas supply path to a substrate to be processed, and the plasmaized gas is processed.
  • the substrate is irradiated and supplied for processing.
  • a functional group such as a hydroxyl group or a carboxyl group is formed on the substrate surface, and the substrate surface is modified. It can also be used to remove organic contaminants on the substrate surface.
  • a gas used in this case for example, a mixed gas of N 2 and O 2 or air is used.
  • the adhesion stability of the antifouling coating material to the glass substrate is higher than that of a conventional antifouling coating layer formed by the dip method without particularly performing a surface treatment or the like on the glass substrate.
  • the durability of the antifouling coating surface can be remarkably improved.
  • a fluorine resin material is preferably used as the antifouling coating material applied to the glass surface.
  • this fluororesin material is applied to a glass substrate by a dip method, the adhesion stability to the glass substrate is particularly bad.
  • the reaction gas used is preferably He, Ar or N2, and more preferably He.
  • the power consumption varies slightly depending on the type of reaction gas used, the power used is preferably in the range of 200 to 500 W, more preferably 300 to 400 W.
  • the treatment time is preferably in the range of 10 to 250 seconds, more preferably 30 to 90 seconds.
  • the reaction gas to be used is preferably a mixed gas of an inert gas and air or O2, and more preferably a mixed gas of N2 and air.
  • the electric power used varies slightly depending on the type of reaction gas used, the power used is preferably in the range of 400 to 1200 W, more preferably in the range of 600 to 1000 W.
  • the processing time is preferably 5 to 60 seconds, and more preferably 10 to 15 seconds.
  • the planar plasma processing is first performed, and then the downstream plasma processing is performed. This is preferable because the glass surface shape is changed and a functional group is generated on the glass surface.
  • the antifouling coating layer 20 is formed on the main surface 12.
  • the antifouling coating layer 20 is formed as shown in FIG. 4B from the state of only the glass substrate 10 as shown in FIG.
  • the coating material is preferably a perfluoropolyether compound (fluorine resin) having a hydroxyl group at the terminal group. Thereby, it can bond
  • the antifouling coating layer 20 can be applied and formed by, for example, a dip method.
  • the dipping method is performed by immersing the entire glass substrate 10 in a coating solution containing a coating material in an appropriate solvent, and taking out and drying the glass substrate 10.
  • the antifouling coating layer 20 having a uniform film thickness can be formed on the entire surface of the glass substrate 10 without using a vacuum film forming apparatus.
  • the film formation method is not limited to the dip method, and there are a spin coating method in which a film is formed using centrifugal force, a spray method in which a target substance is sprayed using a spray gun, and a vapor deposition method.
  • the lubricating layer 128 may be formed by these methods.
  • the coating thickness of the antifouling coating layer 20 is not particularly limited, but is preferably in the range of 3 nm to 30 nm, for example.
  • the film thickness is less than 3 nm, the durability is insufficient, and the antifouling function may not be sufficiently exhibited during long-term use.
  • the film thickness exceeds 30 nm, the uniformity of the thickness of the antifouling coating layer 20 cannot be maintained, or the transparency is lowered, so that it does not comply with the demand for portable devices.
  • the mechanical strength of a cover glass can be improved. That is, the mechanical strength as the cover glass can be further improved by forming the antifouling coating layer on the chemically strengthened glass substrate.
  • Step S106 As the antifouling coating layer 20 formed as described above is cured (the solvent evaporates), an adhesion region 22 and a flow region 24 are formed therein.
  • the adhesion region 22 is a region that is adhered to the main surface 12 and affects durability.
  • the flow region 24 is a region that contributes to slipperiness. Therefore, in the present invention, the region thickness adjustment step is performed next to adjust the ratio of the thickness of the adhesion region 22 to the thickness of the antifouling coating layer 20.
  • the region thickness adjustment step is a step of indirectly adjusting the ratio of the thickness of the adhesion region 22 to the antifouling coating layer 20.
  • the region thickness adjustment step no significant decrease in thickness is observed in the adhesion region 22 as compared with the flow region 24. This is presumably because the molecules of the coating material constituting the adhesion region 22 are firmly bonded to functional groups such as hydroxyl groups and carboxyl groups on the surface of the glass substrate.
  • the ratio of the thickness of the adhesion region to the thickness of the antifouling coating layer is preferably 20% to 80%, more preferably 40% to 70%. This is because if the thickness ratio of the adhesion region is less than 20%, the durability cannot be exhibited. Further, if the ratio of the thickness of the adhesion region is more than 80%, the slipping property cannot be exhibited. Furthermore, if it is 40% to 70%, durability and slipperiness can be exhibited better.
  • a bake treatment, an ultraviolet irradiation treatment, and a vacuum degree adjustment treatment by reduced pressure can be performed.
  • the antifouling coating layer 20 can be dried by heating at a temperature equal to or higher than the evaporation temperature of the solvent in a thermostatic oven.
  • the heating temperature is preferably 120 ° C to 180 ° C.
  • the heating time is preferably 30 minutes to 1 hour.
  • the thickness of the flow region 24 can be reduced.
  • the bonding between the molecules of the coating material constituting the adhesion region 22 and the surface of the glass substrate is promoted by heat, and the adhesion region 22 can be enlarged.
  • ultraviolet rays having a wavelength of 150 to 400 nanometers are preferable as the ultraviolet rays.
  • the ultraviolet light source for example, a low-pressure mercury lamp, a high-pressure mercury lamp, or an ultrahigh-pressure mercury lamp can be used.
  • the illuminance of the ultraviolet light source can be about 300 [cmW / cm 2].
  • the thickness of the flow region 24 can be reduced as the illuminance of the ultraviolet light is increased and the irradiation time is lengthened.
  • the atmospheric temperature may be adjusted and the heat treatment may be performed simultaneously. Thereby, the adhesion area
  • the solvent can be evaporated by adjusting the degree of vacuum so that the pressure is lower than the vapor pressure of the solvent.
  • the atmospheric temperature may be adjusted and the heat treatment may be performed simultaneously. Thereby, the adhesion area
  • the cover glass is incorporated into the portable device.
  • a glass substrate for a cover glass was produced by cutting out a predetermined size from a 0.5 mm thick plate glass made of an aluminosilicate glass produced by a downdraw method or a float method.
  • aluminosilicate glass chemically strengthened glass containing SiO2: 58 to 75% by weight, Al2O3: 4 to 20% by weight, Li2O: 3 to 10% by weight, Na2O: 4 to 13% by weight was used.
  • a hole was made in the glass substrate using a grindstone (for small opening diameter processing) or the like, and shape processing of the outer peripheral end face as shown in FIG. 3 was performed, for example.
  • the glass substrate that had undergone the shape processing was chemically strengthened, and immersed in each of washing tanks of sulfuric acid, neutral detergent, pure water, pure water, IPA, and IPA (steam drying) in order, ultrasonically cleaned, and dried.
  • a glass substrate was prepared.
  • Antifouling coating layer forming step Glass is formed by a dipping method using a coating solution (liquid temperature 25 ° C.) in which a fluororesin (manufactured by Shin-Etsu Chemical Co., Ltd. (trade name) KY100 series) is adjusted to an appropriate concentration with a solvent.
  • a fluororesin manufactured by Shin-Etsu Chemical Co., Ltd. (trade name) KY100 series
  • An antifouling coating layer made of a fluororesin was applied to the entire surface of the substrate.
  • the coating thickness of the antifouling coating layer was 10 nm.
  • Region thickness adjusting step hot air drying was performed for 30 minutes.
  • a plurality of samples were manufactured at different drying temperatures as shown in Table 1.
  • HFE HFE as a solvent for 1 minute to remove the flow region 24, and the thickness of the adhesion region 22 was measured.
  • Table 1 shows the ratio of the thickness of the adhesion region 22 to the antifouling coating layer 20 thus obtained.
  • the film thickness is a value measured with an ellipsometer MARY-102 manufactured by FiveLab.
  • the steel wool (# 0000) was slid against the surface of the antifouling coat layer of each sample with a load of 1 kg, and the static friction coefficient, the dynamic friction coefficient, and the variation of the contact angle with water on the antifouling coat layer surface were examined.
  • the measurement results are shown in Tables 2 to 4.
  • the initial values of the static friction coefficient and the dynamic friction coefficient were 0.35 for the static friction coefficient and 0.21 for the dynamic friction coefficient.
  • the friction coefficient was measured using a slider having a load of 50 gf, a sliding speed of 50 mm / second, a sliding distance of 50 mm, a tip surface material of polyethylene, and a tip having a curved shape.
  • the initial value of the water contact angle was 115 degrees.
  • the contact angle of water was measured using a contact angle meter DM-501 manufactured by Kyowa Interface Science according to JIS R3257.
  • Table 2 the evaluation was made based on whether or not the static friction coefficient on the surface of the flow region was 0.2 to 0.4. In Table 3, the evaluation was made based on whether or not the dynamic friction coefficient was 0.1 to 0.3. In Table 4, the evaluation was made based on whether or not the contact angle of water was 100 degrees to 120 degrees.
  • the thickness ratio of the adhesion region is 20% to 80%. Furthermore, in Tables 2 and 3, in samples 4 to 7, the friction coefficient hardly changed even after sliding 2000 times. From this, it can be seen that the ratio of the thickness of the adhered region is more preferably 40% to 70%.
  • the contact angle of water has hardly decreased. This is considered to be because the contact angle of water was maintained because the adhesion region 22 remained even after 2000 times of sliding.
  • the antifouling property (which can be evaluated by a contact angle) has durability, but the slipperiness (which can be evaluated by a friction coefficient) It turns out that it has no durability.
  • the ratio of the thickness of the adhesion region to the thickness of the antifouling coating layer 20% to 80% as in the present invention both the slipperiness and durability of the antifouling coating layer can be exhibited. You can see that
  • FIG. 5 is a diagram showing a state in which a cover glass for an electronic device according to the second embodiment (hereinafter referred to as a protective cover glass 100) is attached to the electronic device.
  • the protective cover glass 100 is an external protective cover glass that is detachably attached so as to cover a part of the exterior of the electronic device.
  • the smartphone 300 is exemplified as the electronic device.
  • the electronic device is not limited to this, and other mobile phones, portable game machines, PDAs (Personal Digital Assistants), digital still cameras, video cameras, Alternatively, a slate PC (Personal Computer) or the like may be used.
  • the smartphone 300 includes a touch panel display 302 and an exterior cover glass (an electronic device cover glass) 304 that covers the surface of the touch panel display 302.
  • the exterior cover glass 304 is attached to the inside of the bezel of the housing 306 so as to form a part of the exterior of the smartphone 300.
  • the protective cover glass 100 includes a glass substrate 102.
  • the protective cover glass 100 is attached by the user of the smartphone 300 so as to cover the outer main surface of the exterior cover glass 304 in order to protect the exterior cover glass 304.
  • FIG. 6 is a schematic cross-sectional view after the protective cover glass 100 of FIG. 5 is attached to an electronic device (smartphone 300).
  • the exterior cover glass 304 is illustrated for the smartphone 300, and components other than the exterior cover glass 304 are schematically illustrated as the smartphone body 300 ⁇ / b> A.
  • the protective cover glass 100 is provided on the back side of the glass substrate 102 for protecting the electronic device (for example, the smart phone 300) and the glass substrate 102.
  • the glass substrate 102 is used as the electronic device (the smart phone 300).
  • An attaching portion (attachment layer) 104 for attaching in a detachable manner is included.
  • the glass substrate 102 includes a front surface 102B (first main surface), a back surface 102C (second main surface) for placement toward the exterior of the electronic device, and an end surface 102A that connects the front surface 102B and the back surface 102C. Have.
  • the thickness of the glass substrate 102 is 0.2 to 0.5 mm. Further, as shown in FIG.
  • an opening is formed in the glass substrate 102 so as to correspond to a position of a microphone, a speaker, a button, or the like of the electronic device.
  • the affixing portion 104 is formed over the entire surface other than the opening portion and the outer peripheral portion of the back surface 102C of the glass substrate 102 in plan view.
  • FIG. 7 is an enlarged view of a range X in FIG.
  • the protective cover glass 100 has, as an overall structure, a recess 106 that is recessed toward the inside in the surface direction on the back surface side of the outer peripheral portion thereof.
  • the recess 106 is arranged such that the outer peripheral edge 104A of the sticking part 104 is arranged on the inner side in the plane direction (left and right direction in FIG. 7) with respect to the back surface 102C from the end surface 102A of the glass substrate 102.
  • the protective cover glass 100 When the protective cover glass 100 is affixed to the smartphone 300 by forming the recess 106 as described above, a gap is generated between the protective cover glass 100 and the smartphone 300 by the recess 106. Therefore, the user can detach the protective cover glass 100 by hooking a nail or the like into the gap. Therefore, the protective cover glass 100 made of glass with good peelability can be realized.
  • the recess 106 can be easily formed without processing the glass with high hardness. Can do.
  • FIG. 8 is a diagram showing a layer structure of the protective cover glass 100 of FIG. 5
  • FIG. 9 is a diagram showing a procedure for forming the protective cover glass 100 of FIG.
  • the protective cover glass 100 includes (1) glass substrate forming step S400, (2) chemical strengthening step S402, (4) glass surface modification treatment S404, and (4) antifouling coat layer forming step S406. (5) Manufactured through the pasting part forming step S410.
  • a glass substrate 102 having a desired shape is formed by machining or etching.
  • an alumina silicate glass containing SiO2: 58 to 75 wt%, Al2O3: 4 to 20 wt%, Li2O: 3 to 10 wt%, Na2O: 4 to 13 wt%, Not only this but soda lime glass etc. may be used.
  • the glass substrate 102 obtained in step S400 is chemically strengthened.
  • a glass substrate 102 is brought into contact with a molten chemical strengthened salt, whereby alkali metal ions having a relatively large atomic radius in the chemically strengthened salt and relatively small atomic radii in the glass substrate 102 are used.
  • This is a process of exchanging the alkali metal ions with the alkali metal ions to infiltrate the surface layer of the glass substrate 102 with alkali metal ions having a large ion radius, thereby generating a compressive stress.
  • alkali metal nitrates such as potassium nitrate and sodium nitrate are preferably used.
  • a low temperature ion exchange method in which ion exchange is performed in a temperature range not exceeding the glass transition temperature, for example, a temperature of 300 to 500 degrees Celsius is preferable. Since the chemically strengthened glass substrate 102 is improved in strength and excellent in impact resistance, the glass substrate 102 for the cover glass 100 exhibits a sufficient effect as a cover glass even with a thickness of about 0.3 mm, for example. it can.
  • the surface of the glass substrate 102 is subjected to glass surface modification treatment comprising both planar plasma processing and downstream plasma processing. Thereby, the adhesion stability of the antifouling coating layer to the glass substrate can be sufficiently increased, and the durability of the antifouling coating surface can be improved.
  • the details of the glass surface modification treatment S404 are the same as step S102 shown in the first embodiment.
  • the antifouling coating layer 110 is formed on the glass substrate 102 chemically strengthened in step S402.
  • the antifouling coating layer 110 is applied and formed on the surface of the glass substrate 102 by, for example, a spray method, a dip method, a vapor deposition method, or a brush coating method.
  • the coating material is preferably a perfluoropolyether compound (fluorine resin) having a hydroxyl group at the terminal group. Thereby, it can couple
  • by forming the antifouling coating layer 110 it is possible to suppress the adhesion of dirt such as fingerprints, and to easily wipe off even if dirt such as fingerprints adheres.
  • an adhesion region 110a and a flow region 110b are formed therein.
  • the thickness of the flow region 110b is decreased and adjusted by adjusting the evaporation rate of the solvent and volatilizing the molecules having a small molecular weight.
  • the ratio of the thickness of the adhesion region 110a to the thickness of the antifouling coating layer 110 is 20% to 80%, and further 40% to 70%.
  • a baking process, an ultraviolet irradiation process, and a vacuum degree adjusting process using reduced pressure are performed as the region thickness adjusting step.
  • the pasting part 104 is formed on the glass substrate 102.
  • the affixing part 104 is formed of a silicon adhesive.
  • the affixing part 104 affixes the reinforcing film for reinforcing the glass substrate 102, the first adhesive layer for adhering the back surface 102C and the reinforcing film, and the reinforcing film to the cover glass 304 for exterior use.
  • the structure which has the 2nd contact bonding layer which consists of this silicon type adhesive agent (all of each layer is not shown in figure) may be sufficient. By providing such a reinforcing film, the glass substrate 102 can be reinforced from the back side.
  • the thickness of the sticking portion 104 is preferably in the range of 0.02 to 0.2 mm, more preferably 0.02 mm, from the viewpoint of achieving both exhibiting peelability and reducing the thickness of the protective cover glass 100. It is in the range of 05 to 0.1 mm.
  • the length L1 (the depth dimension from the end surface 102A of the recess 106) L1 that is recessed toward the inside of the recess 106 is 0.1 mm to 0.3 mm than the end surface 102A of the glass substrate 102. It is good to be in the range. Thereby, coexistence of peelability and aesthetics can be aimed at. That is, when length L1 is 0.1 mm or more, peelability can be exhibited more.
  • the length L1 exceeds 0.3 mm, dust, sebum, etc. accumulate in the hollow part 106 with the passage of time, and there is a possibility that the aesthetic appearance of the smartphone 300 may be impaired.
  • portable electronic devices such as a mobile phone including the smartphone 300 are often placed in a pocket of a user's clothes, and therefore, clothes fibers and the like tend to collect in the recess 106 as dust.
  • FIG. 10 is an explanatory diagram of a range where the recess 106 in FIG. 7 is formed.
  • FIG. 10A is a diagram showing a first example
  • FIG. 10B is a diagram showing a second example. 10A and 10B, the range of the depression 106 is indicated by a dotted line.
  • a recess 106 may be provided on the entire circumference on the back side of the outer peripheral portion of the protective cover glass 100.
  • the depression 106 is provided on one side of the pair of short sides of the smartphone 300 (the upper side of FIG. 10B).
  • the depression 106 may be provided in at least a part of the outer peripheral portion of the protective cover glass 100, such as providing a depression in the shape of a circular arc in plan view, or in a corner portion of the protective cover glass 100 in plan view. .
  • the hollow part 106 might be formed by the position of 104 A of outer peripheral ends of the sticking part 104, as for the protective cover glass 200 concerning 3rd Embodiment, the back surface side of the outer peripheral part of the glass substrate 202 is inside. It is different from the protective cover glass 100 according to the second embodiment in that it is recessed toward the surface and forms a part of the recessed portion 106.
  • FIG. 11 is a view showing an outer peripheral portion of the protective cover glass 200 according to the third embodiment
  • FIG. 12 is a view showing another example of the third embodiment. 11 and 12 are views corresponding to FIG. 7 of the second embodiment.
  • an interposition surface 202D that is inclined toward the inner side (the inner side in the surface direction of the back surface 202C) than the end surface 202A is formed.
  • the interposition surface 202 ⁇ / b> D may be formed on the entire outer periphery of the glass substrate 202, or may be formed only on a part of the outer periphery, a part of the outer periphery, or only a corner portion in plan view of the glass substrate 202. May be.
  • the interposed surface 202D constitutes a part of the contour of the recess 106.
  • a gap generated between the protective cover glass 200 and the smartphone 300 can be made larger than the thickness of the pasting portion 104. This makes it easier for the user to hook a nail or the like into the gap of the recess 106. Therefore, the peelability of the protective cover glass 200 can be enhanced as compared with the second embodiment.
  • the glass substrate 212 includes a front surface (first main surface) 212B, a back surface (second main surface) 212C, an end surface 212E that is an inclined surface that forms a curve in a cross-sectional view, and a back surface.
  • An interposition surface 212D is provided between 212C and the end surface 212E.
  • the end surface 212E is inclined so as to taper from the back surface 212C side to the front surface 212B side.
  • a boundary portion 212F between the surface 212B and the end surface 212E of the glass substrate 212 has a rounded shape.
  • the boundary portion 212A between the end surface 212E and the interposition surface 212D (the outermost peripheral portion of the end surface 212E) is also rounded.
  • the height of the end surface 212E is preferably higher than the height of the interposition surface 212D. This is because the smoothness when touched is more important than the ease of hooking during normal use (after completion of the pasting operation).
  • the end surface 212E is inclined so as to taper from the back surface 212C side to the front surface 212B side, it is possible to prevent the user's finger or the like from being caught when operating the user's electronic device. . Further, by rounding the boundary portion 212A between the surface 212B and the end surface 212E of the glass substrate 212, the tactile sensation when the user touches the boundary portion with a finger can be made smoother. Therefore, it is particularly effective in the case of the smartphone 300 having the touch panel display 302.
  • FIG. 13 is a diagram illustrating a method for processing the outer peripheral portion of the glass substrates 202 and 212 of FIGS. 11 and 12.
  • FIG. 13A is a diagram for processing the glass substrate 202 by machining.
  • the machining for example, processing using the rotating grindstone 308 illustrated in FIG. 13A is effective. .
  • FIG. 13B is a diagram for processing the glass substrate 212 by etching.
  • the intervening surface 212D having a curved cross-sectional shape is formed like the glass substrate 212 of FIG. 12, processing by etching illustrated in FIG. 13B is effective.
  • the end surface 212E is formed in addition to the intervening surface 212D and the boundary portion 212F is rounded, it is advantageous because it can be formed at a time by etching.
  • the shapes of the boundary portions 212A and 212F can be suitably formed.
  • the configuration in which the protective cover glasses 100, 200, and 210 are attached to the exterior cover glass 304 of the smartphone 300 has been described.
  • the present invention is not limited to this, and for example, a configuration in which the smartphone 300 is attached to the back side of the housing 306 may be used.
  • Example 10 As an example, as shown in FIG. 7 of the second embodiment, only the outer peripheral end 104A of the sticking part 104 is arranged at a distance from the end face 102A to form the recessed part 106, and the length L1 of the recessed part 106 is changed. Then, testing and evaluation were performed.
  • the thickness of the glass substrate 102 was 0.3 mm, and the height of the recess 106 was 0.1 mm.
  • each of the protective cover glasses 100 having the length L1 of the hollow portion 106 of the samples 101 to 110 shown in Table 5 was prepared, and the following test was performed. That is, each protective cover glass of samples 101 to 110 was actually attached to the smartphone 300, and it was tested how many times the test subject could peel off the protective cover glass with a finger.
  • the criteria for evaluation are as follows. ⁇ ... Success in 1 time, ⁇ ... Success in 2 to 3 times, ⁇ ... Success in 4 to 5 times, ⁇ ... Success in 6 times or more
  • each protective cover glass of Samples 101 to 110 after each protective cover glass was attached to the smartphone 300, the state after 30 days of use was examined.
  • the smartphone 300 a smartphone whose outer periphery is covered with black paint is used.
  • L1 of the hollow portion 106 depth dimension from the end surface 102A of the hollow portion 106
  • L1 should be in the range of 0.1 mm to 0.3 mm.
  • the description has been made centering on the configuration in which the outer peripheral end of the pasting portion is arranged at a distance from the end surface of the glass substrate on the inner side in the surface direction of the back surface of the glass substrate.
  • a notch structure may be provided between the second main surface and the end surface of the glass substrate, and only this notch structure may be used as the depression.
  • the position of the outer peripheral edge of the sticking part and the position of the end face of the glass substrate may be matched, and the outer peripheral part of the sticking part may be configured to follow the inner surface of the notch structure of the glass substrate. Good.
  • a clearance gap is formed between the outer peripheral part of a sticking part and the exterior of an electronic device, and this clearance gap can be made into a hollow.
  • a process of reducing the adhesiveness of the outer peripheral portion of the pasting portion may be performed in advance.
  • the present invention relates to a cover glass for an electronic device used for protecting a display screen of a portable device such as a mobile phone, a portable game machine, a PDA (Personal Digital Assistant), a digital still camera, a video camera, or a slate PC (Personal Computer). And can be used as a manufacturing method thereof.
  • a portable device such as a mobile phone, a portable game machine, a PDA (Personal Digital Assistant), a digital still camera, a video camera, or a slate PC (Personal Computer).
  • a slate PC Personal Computer
  • SYMBOLS 1 Cover glass for electronic devices, 10 ... Glass substrate, 10a ... Outer peripheral surface, 10b ... Notch, 10c ... Ear hole, 10d ... Key operation hole, 12 ... Main surface, 20 ... Antifouling coating layer, 22 ... Adhesion area, 24 ... Flow region, 100, 200, 210 ... Protective cover glass, 102, 202, 212 ... Glass substrate, 102A, 202A ... End face, 102B, 202B, 212B ... Surface (first main surface), 102C, 202C, 212C ... back surface (second main surface), 202D, 212D ... intervening surface, 212E ...

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Abstract

L'invention vise à procurer un verre de revêtement pour un instrument électronique, apte à produire tout à la fois des performances de durée de vie et de glissement vis-à-vis de la couche de revêtement antisalissure, ainsi qu'un procédé pour sa fabrication. A cet effet, selon l'invention, une configuration typique de ce verre de revêtement (1) pour un instrument électronique est caractérisée en ce qu'elle comporte un substrat en verre (10) et une couche de revêtement antisalissure (20) formée sur la surface du substrat en verre, la couche de revêtement antisalissure (20) ayant une région d'adhérence (22) adhérant à la surface du substrat en verre et une région d'écoulement (24) disposée sur la surface de la région d'adhérence.
PCT/JP2013/075667 2012-09-28 2013-09-24 Verre de revêtement pour instrument électronique et procédé pour sa fabrication WO2014050798A1 (fr)

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JP2014538483A JP5913608B2 (ja) 2012-09-28 2013-09-24 電子機器用カバーガラス及びその製造方法

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US11524367B2 (en) 2017-02-21 2022-12-13 AGC Inc. Glass plate and manufacturing method of glass plate
US11535553B2 (en) 2016-08-31 2022-12-27 Corning Incorporated Articles of controllably bonded sheets and methods for making same
US11905201B2 (en) 2015-06-26 2024-02-20 Corning Incorporated Methods and articles including a sheet and a carrier
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