CN110372222B - Glass panel, preparation method thereof, display screen comprising glass panel and terminal - Google Patents

Glass panel, preparation method thereof, display screen comprising glass panel and terminal Download PDF

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Publication number
CN110372222B
CN110372222B CN201910583822.XA CN201910583822A CN110372222B CN 110372222 B CN110372222 B CN 110372222B CN 201910583822 A CN201910583822 A CN 201910583822A CN 110372222 B CN110372222 B CN 110372222B
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glass panel
panel body
film
fingerprint
terminal
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CN110372222A (en
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庞欢
黄义宏
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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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
    • C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
    • 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
    • C03C17/30—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with silicon-containing compounds
    • 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
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/42—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating of an organic material and at least one non-metal coating
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • 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
    • C03C2217/20—Materials for coating a single layer on glass
    • C03C2217/21—Oxides
    • C03C2217/213—SiO2
    • 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
    • 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
    • C03C2218/00—Methods for coating glass
    • C03C2218/10—Deposition methods
    • C03C2218/15—Deposition methods from the vapour phase
    • C03C2218/154—Deposition methods from the vapour phase by sputtering
    • C03C2218/156—Deposition methods from the vapour phase by sputtering by magnetron sputtering
    • 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
    • C03C2218/00—Methods for coating glass
    • C03C2218/10—Deposition methods
    • C03C2218/17—Deposition methods from a solid phase

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

The embodiment of the invention provides a glass panel, which comprises a glass panel body and an AF fingerprint prevention film arranged on one side surface of the glass panel body, wherein corrosion pits are arranged on one side surface, close to the AF fingerprint prevention film, of the glass panel body, the surface roughness Ra of one side, provided with the AF fingerprint prevention film, of the glass panel body is 8nm-50nm, and Rz is 20nm-100 nm. According to the glass panel, the corrosion pits are formed on the surface of the glass panel body, so that the surface roughness of the glass panel body is improved, and the surface roughness of the glass panel after AF coating is improved, thereby greatly inhibiting the generation of static electricity in film tearing operation. The embodiment of the invention also provides a preparation method of the glass panel, and a display screen and a terminal comprising the glass panel.

Description

Glass panel, preparation method thereof, display screen comprising glass panel and terminal
Technical Field
The embodiment of the invention relates to the technical field of touch screens, in particular to a glass panel, a preparation method of the glass panel, a display screen comprising the glass panel and a terminal.
Background
In the process of assembling and transporting electronic product touch screens such as mobile phones, in order to prevent a glass panel on the surface of the touch screen from being scratched, a protective film is required to protect the surface of the glass panel. In order to improve the Anti-smudging and smoothness of the glass panel, an Anti-Fingerprint (AF) film is usually formed on the surface of the glass panel, the AF film includes perfluoropolyether siloxane mainly containing carbon, oxygen, fluorine and silicon, wherein the fluorine atom has strong electron-withdrawing ability, and the impedance of the AF material is more than 1013Ω, and the charge transfer rate is low due to the insulating property. Therefore, when the AF film layer is provided with the protective film, a high static voltage is easily generated when the protective film is peeled off from the touch panel surface, and static charge is hard to dissipate in a short time. The film tearing operation is performed in the procedures of incoming material inspection, dispensing, pressing and the like of an electronic product assembly production line such as a smart phone. Static charge generated by the film tearing can be conducted from the surface of the glass to the pin end of the BTB (touch to touch) of the touch screen, and a discharge loop can be formed when the BTB pin touches a metal middle frame or other metal materials in the assembling process to generateThe current discharge may damage the IC chip, resulting in poor display of the touch screen, such as black screen, patterned screen, and electrostatic cross striations. Therefore, in order to avoid poor display caused by static electricity generated by the torn film during the assembly and production of the touch screen, it is urgently needed to develop a method for reducing the static electricity of the torn film of the glass panel of the touch screen.
Disclosure of Invention
In view of this, an embodiment of the present invention provides a glass panel, in which a corrosion pit is formed on a surface of a glass panel body through activation processing, so as to improve surface roughness of the glass panel after AF coating, and reduce static electricity generated in a film tearing process of the glass panel, so as to solve, to a certain extent, a problem of poor display such as a black screen, a patterned screen, and a static cross-striation caused by static electricity generated by film tearing in an assembly process of an electronic product such as a mobile phone.
Specifically, a first aspect of the embodiments of the present invention provides a glass panel, including a glass panel body and an AF anti-fingerprint film disposed on one side surface of the glass panel body, where a side surface of the glass panel body close to the AF anti-fingerprint film has an etch pit, and a side surface of the glass panel provided with the AF anti-fingerprint film has a surface roughness Ra of 8nm to 50nm and an Rz of 20nm to 100 nm.
In the embodiment of the invention, the surface roughness Ra of one side of the glass panel, which is provided with the AF fingerprint preventing film, is 10nm to 30nm, and Rz is 20nm to 60 nm.
In the embodiment of the invention, the roughness Ra of one side surface of the glass panel body with the etch pits is 5nm-100nm, and Rz is 10nm-500 nm.
In the embodiment of the invention, the molar content of the hydroxyl hydrophilic group on the surface of one side of the glass panel body, which is provided with the corrosion pits, is 0.001-0.1%. The hydroxyl group [ OH ]]The content is calculated by [ OH ]]＝{[10-2·(1/d)·lg(T3845/T3500)·MOH]100% of the glass panel, wherein d is the thickness of the glass panel body, T3845And T3500Are respectively 3845cm of the glass panel body-1And 3500cm-1Infrared transmittance of (2), MOHIs the molar mass of hydroxyl groups, rho is the density of the glass panel body, and epsilon is 3500cm of the glass panel body-1The extinction coefficient of (d).
In the embodiment of the invention, the resistivity of one side surface of the glass panel body with the corrosion pits is 1.0 multiplied by 109Ω-9.9×1012Ω。
In the embodiment of the invention, a silicon dioxide layer is arranged between the glass panel body and the AF fingerprint preventing film.
In an embodiment of the present invention, the thickness of the silicon dioxide layer is in the range of 0.1nm to 500 nm.
According to the glass panel provided by the first aspect of the embodiment of the invention, the surface roughness of the glass panel body is improved and the surface resistivity of the glass panel is reduced by performing surface activation treatment on the glass panel body, so that static electricity generated in the film tearing process of the glass panel is greatly reduced. Specifically, on one hand, due to the formation of the corrosion pits on the surface of the glass panel body, the surface roughness of the glass panel body is improved, the roughness of the surface of the glass panel after AF coating is also improved, when the protection film covers the surface of the AF film layer, the microcosmic contact area of the AF film layer and the glue layer of the protection film of the glass panel can be reduced, the interaction force between the AF film layer and the glue layer of the protection film is weakened, the electron transfer amount between the glass panel and the glue layer of the protection film is reduced in the film tearing process, and the generation of static electricity of the torn film is greatly inhibited; on the other hand, the surface of the glass panel body is subjected to surface activation treatment, the surface layer of the glass panel body is corroded by the activating solution, the crystal skeleton structure of the surface oxide becomes loose, hydroxyl hydrophilic groups on the surface layer of the glass panel body are increased, and the surface resistivity is reduced, so that the electrostatic conductivity of the glass panel is improved.
In a second aspect, an embodiment of the present invention further provides a method for manufacturing a glass panel, including:
after the glass panel body is chemically strengthened, carrying out surface activation by adopting a chemical etching method to form corrosion pits on the surface of the glass panel body, wherein the surface roughness Ra of the glass panel body is controlled within the range of 5nm-100nm, and the Rz is controlled within the range of 10nm-500 nm;
and preparing an AF anti-fingerprint film on the surface of the activated glass panel body with the etch pits, wherein the surface roughness Ra of the glass panel after the AF anti-fingerprint film is prepared is 8-50 nm, and the Rz is 20-100 nm.
In the embodiment of the invention, the chemical etching method comprises alkali etching and/or acid etching, the etching temperature is 23-99 ℃, and the etching time is 1min-24 h.
In the embodiment of the invention, the alkali etching is performed by soaking in an alkaline activating solution, wherein the alkaline activating solution comprises alkali metal hydroxide and/or alkali metal weak acid salt, water and/or an organic solvent, and the pH value of the alkaline activating solution is 8-14.
In the embodiment of the invention, the acid etching is performed by soaking in an acidic activating solution, the acidic activating solution comprises hydrofluoric acid or ammonium fluoride modified solvent, and the pH value of the acidic activating solution is 1-6.
In the embodiment of the invention, the AF anti-fingerprint film is prepared by adopting a thermal evaporation mode.
In an embodiment of the present invention, the preparation method further includes, before preparing the AF anti-fingerprint film, preparing a silica layer on the surface of the glass panel.
In an embodiment of the present invention, the thickness of the silicon dioxide layer is in the range of 0.1nm to 500 nm.
The preparation method provided by the second aspect of the embodiment of the invention has simple process and is suitable for industrial production.
The third aspect of the embodiment of the invention provides a display screen, which comprises a display screen module and a glass panel covered on the display screen module, wherein the glass panel is the glass panel in the first aspect of the embodiment of the invention.
The embodiment of the invention also provides a terminal, which comprises a shell assembled at the outer side of the terminal and a circuit board positioned in the shell, wherein the shell comprises a display screen assembled at the front side, the display screen comprises a glass panel and a display module arranged at the inner side of the glass panel, the glass panel comprises a glass panel body and an AF fingerprint preventing film arranged on the surface of one side, facing the outer side of the terminal, of the glass panel body, the surface of one side, close to the AF fingerprint preventing film, of the glass panel body is provided with an etching pit, the surface roughness Ra of one side, provided with the AF fingerprint preventing film, of the glass panel is 8nm-50nm, and Rz is 20nm-100 nm.
In the embodiment of the invention, the surface roughness Ra of one side of the glass panel, which is provided with the AF fingerprint preventing film, is 10nm to 30nm, and Rz is 20nm to 60 nm.
In the embodiment of the invention, the roughness Ra of one side surface of the glass panel body with the etch pits is 5nm-100nm, and Rz is 10nm-500 nm.
In the embodiment of the invention, the mole content of the hydroxyl hydrophilic group on the surface of one side of the glass panel body, which is provided with the corrosion pits, is 0.001-0.1%.
In the embodiment of the invention, the resistivity of one side surface of the glass panel body with the corrosion pits is 1.0 multiplied by 109Ω-9.9×1012Ω。
In the embodiment of the invention, a silicon dioxide layer is arranged between the glass panel body and the AF fingerprint preventing film.
In an embodiment of the present invention, the thickness of the silicon dioxide layer is in the range of 0.1nm to 500 nm.
According to the terminal provided by the embodiment of the invention, as the used glass panel has higher surface roughness, the static electricity generated by the glass panel in the film tearing process can be reduced, so that the problem of poor display such as black screen, patterned screen and static transverse striation caused by the static electricity generated by film tearing in the assembling process of electronic products such as mobile phones in the prior art is solved to a certain extent.
Drawings
Fig. 1 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a glass panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a glass panel according to another embodiment of the present invention;
FIG. 4 is an atomic force microscope image of the front surface of the glass panel of the touch screen of the mobile phone according to the first embodiment of the present invention;
fig. 5 is an atomic force microscope photograph of the front side of a cell phone touch screen glass panel of a comparative example without surface activation.
Detailed Description
The embodiments of the present invention will be described with reference to the drawings.
Referring to fig. 1, an embodiment of the present invention provides a terminal 200, where the terminal 200 may be a mobile phone, or an electronic product such as a tablet computer, a smart wearable product, and the like, and the terminal 200 includes a housing assembled outside the terminal, and a circuit board located inside the housing, where the housing may include a display screen assembled on a front side of the terminal and a rear cover assembled on a rear side of the terminal. The display screen may include a glass panel 100 and a display module disposed inside the glass panel 100. In the embodiment of the present invention, the display screen may be a touch display screen. In some embodiments of the present invention, the terminal 100 may further include a middle frame connected between the display screen and the rear cover, which are stacked, and the display screen, the middle frame and the rear cover are collectively arranged to form an enclosure space, and the battery, the circuit board and other components are arranged in the enclosure space. The specific arrangement of the middle frame is not limited, and the middle frame may be integrated with the rear cover, or may be placed inside the terminal 100 and accommodated in a space defined by the display screen and the rear cover.
As shown in fig. 2 and 3, the glass panel 100 includes a glass panel body 10 and an AF fingerprint-proof film 11 disposed on one side surface of the glass panel body 10, the side surface of the glass panel body 10 close to the AF fingerprint-proof film 11 has an etch pit, and the AF fingerprint-proof film 11 completely covers one side surface of the glass panel body 10 and covers the surface of the etch pit. Generally, the AF anti-fingerprint layer is disposed on a side surface of the glass panel body 10 facing the outside of the terminal, i.e., a side surface accessible to a user. In other application scenarios of the present invention, AF anti-fingerprint layers may be disposed on both side surfaces of the glass panel body 10 according to practical application requirements.
In the embodiment of the present invention, the etch pits on the surface of the glass panel body 10 are formed by performing chemical activation treatment on the surface of the glass panel body 10, and the formation of the etch pits improves the surface roughness of the glass panel body 10. The corrosion pit refers to a concave-convex structure formed on the surface of the glass through chemical activation corrosion, and the roughness of the concave-convex structure can be characterized through an atomic force microscope and cannot be seen by naked eyes. In the embodiment of the present invention, the surface roughness Ra of the glass panel body 10 is controlled to be 5nm to 100nm, and Rz is controlled to be 10nm to 500 nm. Due to the existence of the corrosion pits, pit structures are still reserved at the positions of the corrosion pits after the AF fingerprint-proof film is covered, so that the surface of the glass panel still has the nano-scale pits, and the surface is uneven. The surface roughness Ra and Rz of the glass panel 100 covered with the AF anti-fingerprint film are controlled to be 8-50 nm and 20-100 nm, so that when the surface of the glass panel is covered with the protective film, the glue layer of the protective film cannot be in contact with the AF film layer in the corrosion pit, the microcosmic contact area of the AF anti-fingerprint film and the glue layer of the protective film is reduced, the interaction force between the AF anti-fingerprint film and the glue layer of the protective film is weakened, the electron transfer amount between the glass panel and the glue layer of the protective film is reduced in the film tearing process, and the generation of static electricity of the film tearing is greatly inhibited. In the embodiment of the invention, the optical performance of the glass can be influenced by the excessively high roughness of the glass panel, and in order to better control the film tearing voltage and the optical performance of the glass panel, Ra can be controlled to be 10nm-30nm, Rz can be controlled to be 20nm-60nm, concretely, Ra can be 10nm, 15nm, 20nm, 25nm and 30nm, and Rz can be 20nm, 30nm, 40nm, 50nm and 60 nm. In the embodiment of the invention, Ra is the arithmetic mean deviation of the profile, namely the arithmetic mean of the absolute values of the profile offset within the sampling length; rz is the maximum height of the profile, i.e. the distance between the peak and valley lines of the profile.
In the embodiment of the present invention, the glass panel body 10 has a surface with etch pits, and the silica crystal skeleton structure is loose and is rich in hydroxyl hydrophilic groups. Specifically, when the glass panel body 10 is chemically activated, the silica skeleton on the surface of the glass is corroded by the chemical activation solution, the oxide crystal skeleton structure in the glass structure becomes loose, and K is2O and Na2O is first reacted with a chemical activating solution, Li2And the O reacts with the chemical activation solution, so that hydrophilic groups (hydroxyl) on the surface of the glass are increased, the surface resistivity of the glass is reduced, and the electrostatic conductivity is increased, thereby reducing the static electricity of the touch screen tear film. In the embodiment of the present invention, the molar content of the hydroxyl hydrophilic group on the surface of the glass panel body 10 having the etch pits is 0.001 to 0.1%, and further, the molar content of the hydroxyl hydrophilic group is 00.01 to 0.1 percent. In the present embodiment, the surface resistivity of the surface of the glass panel body 10 having the etching pits is 1.0 × 109Ω-9.9×1012Ω, and further, the surface resistivity may be 1.0 × 109Ω-9.9×1010In the range of Ω. In the embodiment of the present invention, for convenience of the etching process, when the AF anti-fingerprint film is disposed on only one side surface of the glass panel body 10, an etch pit may also be formed on the opposite side surface of the glass panel body 10.
In the embodiment of the present invention, a large number of corrosion pits are distributed on one or both sides of the surface of the glass panel body 10, and most of the corrosion pits are irregular or regular in shape, and the corrosion pits may be uniformly or non-uniformly distributed, and the specific size and distribution are determined by the composition of the glass panel body 10, the type of the chemical activation solution, the activation time, and other factors.
As shown in fig. 2, in the embodiment of the present invention, a silicon dioxide layer 12 is further included between the glass panel body 10 and the AF anti-fingerprint film 11. In some embodiments of the present invention, the thickness of the silicon dioxide layer 12 may be set in the range of 0.1nm to 500nm, and further, the thickness may be in the range of 1nm to 300 nm. The arrangement of the silicon dioxide layer 12 can improve the grafting rate of the perfluoropolyether siloxane on the glass surface and improve the adhesion of the AF fingerprint preventing film 11 on the surface of the glass panel.
In the present embodiment, the glass panel body 10 may be made of conventional glass materials, including but not limited to chemically strengthened aluminosilicate glass panels. The AF anti-fingerprint film 11 is an existing conventional film layer, the film layer contains perfluoropolyether siloxane, the thickness of the film layer can be 5nm-50nm, and the specific thickness can be 5nm, 15nm, 20nm, 30nm, 40nm and 50 nm.
In the embodiment of the invention, the method for evaluating the film tearing voltage of the glass panel of the touch screen comprises the steps of testing the surface electrostatic voltage peak value of the torn glass panel by adopting a Trek520 electrostatic voltage tester at the temperature of 20-25 ℃ and the humidity of 40-50% RH, requiring a tester to wear electric gloves and wrist straps, holding the glass panel by hand to tear the film, wherein the distance between the glass panel and a desktop is more than 30cm, and the peeling speed of the torn film is more than 20 cm/s. According to the glass panel disclosed by the embodiment of the invention, before the AF anti-fingerprint film is coated, the surface of the glass panel is subjected to surface activation treatment to form the nanoscale corrosion pits, and after the AF anti-fingerprint film is coated, the surface of the glass panel still presents unevenness, so that the microcosmic contact area of the AF anti-fingerprint film and the protective film adhesive layer is reduced, the interaction force between the AF anti-fingerprint film and the protective film adhesive layer is weakened, the electron transfer quantity of the glass panel and the protective film adhesive layer is reduced in the film tearing process, and the generation of static electricity of the torn film is greatly inhibited. Therefore, compared with the existing touch screen glass panel with the glass panel body without the corrosion pit, under the same test condition, the glass panel provided by the embodiment of the invention has lower film tearing voltage, so that the problem of poor display of black screen, patterned screen, static cross striation and the like caused by static electricity generated by film tearing in the assembly process of electronic products such as mobile phones and the like can be effectively solved.
In addition, the embodiment of the invention also provides a preparation method of the glass panel, which comprises the following steps:
s10, chemically strengthening the glass panel body, and performing surface activation through a chemical etching method to form etch pits on the surface of the glass panel body, wherein the surface roughness Ra of the glass panel body is controlled within the range of 5nm-100nm, and the Rz is controlled within the range of 10nm-500 nm;
s20, printing ink on one side surface of the glass panel body with the activated surface, and preparing an AF anti-fingerprint film on the other side surface with the etch pits, wherein the surface roughness Ra of the glass panel after the AF anti-fingerprint film is prepared is 8nm-50nm, and the Rz is 20nm-100 nm.
In the embodiment of the invention, the chemical etching method comprises alkali etching and/or acid etching, the etching temperature can be 23-99 ℃, and the etching time can be 1min-24 h. In some embodiments of the present invention, the surface of the glass panel body may be surface-activated by alkali etching, and the alkali etching process may specifically be performed by soaking in an alkali activating solution, where the alkali activating solution may include an alkali metal hydroxide and/or an alkali metal salt of a weak acid, and water and/or an organic solvent, and the pH of the alkali activating solution may range from 8 to 14, and further, the pH of the alkali activating solution may range from 12 to 14. In other embodiments of the present invention, the surface of the glass panel body may also be activated by acid etching, the specific operation of the acid etching process may be soaking in an acidic activation solution, the acidic activation solution may include a hydrofluoric acid or ammonium fluoride modified solvent, the ammonium fluoride modified solvent includes ammonium fluoride and a modified additive, and specifically may be a mixed solution of ammonium fluoride, oxalic acid, ammonium sulfate, barium sulfate, water and glycerol, the pH of the acidic activation solution ranges from 1 to 6, and further the pH of the acidic activation solution ranges from 1 to 3.
In the embodiment of the invention, after the surface activation, the corrosion pits are formed on the surface of the glass panel body, the formation of the corrosion pits improves the surface roughness of the glass panel body, and the surface roughness of the glass panel body can be regulated and controlled by controlling the concentration, pH, activation temperature, activation time and the like of chemical activation liquid (including acidic activation liquid and alkaline activation liquid). According to the embodiment of the invention, the surface roughness Ra of the glass panel body is controlled within the range of 5nm-100nm, and the Rz is controlled within the range of 10nm-500nm, so that after the AF fingerprint-proof film is plated, the surface roughness Ra of the glass panel can be kept within the range of 8nm-50nm, and the Rz is kept within the range of 20nm-100nm, therefore, when the surface of the glass panel is covered with the protection film, the glue layer of the protection film cannot be contacted with the AF fingerprint-proof film in the nanoscale corrosion pit, the microcosmic contact area of the AF fingerprint-proof film and the glue layer of the protection film is reduced, the interaction force between the AF fingerprint-proof film and the glue layer of the protection film is weakened, the electron transfer quantity of the glass panel and the glue layer of the protection film is reduced in the film tearing process, and the generation of static electricity of the torn film is greatly inhibited. Meanwhile, during chemical activation, the silicon dioxide skeleton on the surface of the glass can be corroded by chemical activation liquid, the oxide crystal skeleton structure in the glass structure becomes loose, and K2O and Na2O reacts with chemical activating solution first, Li2And the O reacts with the chemical activation solution, so that hydrophilic groups (hydroxyl) on the surface of the glass are increased, the surface resistivity of the glass is reduced, and the electrostatic conductivity is increased, thereby reducing the static electricity of the touch screen tear film. In the embodiment of the invention, the molar content of the hydroxyl hydrophilic group on the surface of the glass panel body with the corrosion pits is 0.001-0.1%, and further the molar content of the hydroxyl hydrophilic group is 0.01-0.1%. In the present embodiment, the surface resistivity of the surface of the glass panel body 10 having the etching pits is 1.0 × 109Ω-9.9×1012Omega, further, the surface resistivity may be in the range of 1.0X 109Ω-9.9×1010In the range of Ω.
In the embodiment of the present invention, in the surface activation process, the entire surface of the glass panel body may be activated to form etching pits on both surfaces of the glass panel body, or etching pits may be formed only on one side where the AF anti-fingerprint film is prepared.
In some embodiments of the present invention, the AF anti-fingerprint film may be prepared by thermal evaporation. Specifically, the AF film material pill is heated to enable AF molecules to be evaporated on the glass panel body, and the chemical component of the AF film material is perfluoropolyether siloxane with the molecular weight of 300g/mol-8000 g/mol. In other embodiments of the invention, the AF anti-fingerprint film can also be prepared in a spraying manner. The thickness of the AF fingerprint preventing film can be controlled within the range of 5nm-50nm, and further, the thickness can be controlled within the range of 10nm-25 nm.
In the embodiment of the invention, before the AF anti-fingerprint film is prepared, the silicon dioxide layer may be prepared on the surface of the glass panel body. In some embodiments of the invention, the silicon dioxide layer may be prepared by thermal evaporation, in particular by heating with an electron gun to evaporate SiO with a purity of 95-99.99 wt%2And (4) crystals. In other embodiments of the present invention, the silicon dioxide layer may also be prepared by magnetron sputtering, specifically, by magnetron sputtering oxidation of a silicon target (elemental silicon content is 90-99.99 wt%).
In some embodiments of the present invention, the thickness of the silicon dioxide layer may be set in a range of 0.1nm to 500nm, and further, the thickness may be set in a range of 1nm to 300 nm.
In the embodiment of the present invention, the operation of chemical strengthening may be conventional operation, and may be one-step ion exchange or two-step ion exchange. Specifically, in some embodiments of the present invention, the glass panel body may be placed on the NaNO3With KNO3The molten salt of (2) is subjected to chemical strengthening treatment.
In the embodiment of the present invention, the glass panel body may include a step of cleaning with water and/or detergent after the chemical strengthening and the ink printing.
The preparation method provided by the embodiment of the invention is simple in process and suitable for industrial production.
The following further describes embodiments of the present invention with reference to a plurality of embodiments by taking the preparation of a glass panel of a touch screen of a mobile phone as an example.
Example one
A preparation method of a glass panel of a touch screen of a mobile phone comprises the following steps:
(1) according to the size and the outline of the mobile phone touch screen panel, selecting an aluminum-silicon glass substrate, cutting the substrate into glass panels with corresponding sizes, scanning, grinding, hot bending or CNC (computer numerical control) molding the glass panels with corresponding outlines, and placing the glass panels on NaNO (NaNO indium tin oxide)3With KNO3Carrying out chemical strengthening treatment in molten salt, cleaning and drying to obtain a chemically strengthened glass panel body;
(2) placing the chemically strengthened glass panel body in a profiling inserting frame for fixing, then soaking the inserting frame in a KOH aqueous solution with the pH value of 11.8, heating the KOH aqueous solution to 40.1 ℃, soaking for 25min, then cleaning by clear water and drying to obtain an activated glass panel body; printing ink on the back surface (namely the surface facing the inside of the mobile phone) of the glass panel body by a silk-screen printing, transfer printing or yellow light process, putting the glass panel into a vacuum cavity of a vacuum coating machine, coating a silicon dioxide layer on the front surface (namely the surface facing the outside of the mobile phone) of the glass panel body by thermal evaporation, and coating an AF fingerprint-proof film on the silicon dioxide layer to obtain the mobile phone touch screen glass panel.
The front surface of the glass panel of the mobile phone touch screen prepared in the first embodiment of the invention is observed by an atomic force microscope, and meanwhile, the glass panel of the mobile phone touch screen without surface activation is used as a comparative example. The other steps of the preparation of the glass panel of the touch screen of the mobile phone without surface activation are the same as those of the first embodiment. Fig. 4 is an afm image of the front surface of the glass panel of the touch screen of the mobile phone according to the first embodiment of the present invention. Fig. 5 is an atomic force microscope photograph of the front side of a cell phone touch screen glass panel of a comparative example without surface activation. As can be seen from fig. 4 and 5, the surface roughness Ra of the glass panel of the touch screen of the mobile phone without surface activation is 2nm after covering the AF anti-fingerprint film, while the surface roughness Ra of the glass panel with surface activation according to the embodiment of the present invention is 9nm after covering the AF anti-fingerprint film.
The resistivity of the glass panel before and after the AF coating in the first embodiment of the invention is tested to be 8.4 multiplied by 109Ω-3.1×1010Omega; the surface resistivity of the glass panel after AF coating was 8.4X 1012Ω-1.4×1013Ω。
The mobile phone touch screen glass panel in the first embodiment of the invention and the mobile phone touch screen glass panel without surface activation in the comparative example are respectively assembled into a touch display screen, and the same protective film tearing static test is carried out. The test method comprises the following steps: under the temperature of 20-25 ℃ and the humidity of 40-50% RH, a Trek520 electrostatic voltage tester is adopted to test the surface electrostatic voltage peak value of the torn glass panel, a tester is required to wear electric gloves and wrist bands and holds the glass panel to tear the film, the distance between the glass panel and a desktop is more than 30cm, the peeling speed of the torn film is more than 20cm/s, and the test result is shown in table 1.
TABLE 1
Figure BDA0002111876650000061
Figure BDA0002111876650000071
Table 1 shows that the tear film voltage of the non-surface-activated touch screen of the comparative example is 320V to 750V, while the tear film voltage of the surface-activated touch screen of the first embodiment of the present invention is 129V to 442V, and thus it can be seen that the tear film voltage of the surface-activated touch screen glass panel of the embodiment of the present invention is greatly reduced.
According to the glass panel of the mobile phone touch screen, only one step of surface activation treatment needs to be added in the processing process of the glass panel to improve the surface roughness of the glass panel and reduce the surface resistivity of the glass, so that the film tearing voltage of the mobile phone touch screen can be greatly reduced, the problems of poor display such as black screen, patterned screen and static cross striation caused by friction or film tearing static electricity in the mobile phone assembling process are effectively solved, the process is efficient and convenient, the cost is low, and the large-scale industrial production is facilitated.
Example two
The preparation process of the glass panel of the touch screen of the mobile phone in the embodiment is consistent with the embodiment, and the difference is only that:
the glass panel after chemical strengthening is placed in a glass inserting frame for fixing, then the inserting frame is soaked in a mixed solution of ammonium fluoride (24 wt%), ammonium sulfate (16 wt%), barium sulfate (24 wt%) water (18 wt%), oxalic acid (12 wt%) and glycerol (6 wt%) with the pH value of 1, and the activating solution is stabilized at 50 ℃ and soaked for 10 min. After the glass panel in the second embodiment is assembled into the touch display screen, the test tear film voltage is only 69V-254V, and phenomena such as tear film black screen, patterned screen and static transverse striation do not occur.
EXAMPLE III
The preparation process of the glass panel of the touch screen of the mobile phone in the embodiment is consistent with the embodiment, and the difference is only that:
and (3) placing the chemically strengthened glass panel into a glass inserting frame for fixing, soaking the inserting frame into a NaOH aqueous solution with the pH value of 14, heating the KOH aqueous solution to 25 ℃, and soaking for 120 min.
After the glass panel in the third embodiment is assembled into the touch display screen, the test tear film voltage is only 33V-145V, and phenomena such as tear film black screen, pattern screen, static transverse striation and the like do not exist.
In other embodiments of the present invention, the etching pits may be formed on the surface of the glass panel body by using a chemical activation solution with other compositions.

Claims (18)

1. The glass panel is characterized by comprising a glass panel body and an AF anti-fingerprint film arranged on one side surface of the glass panel body, wherein the surface of one side, close to the AF anti-fingerprint film, of the glass panel body is provided with corrosion pits, the surface roughness Ra of one side, provided with the AF anti-fingerprint film, of the glass panel is 8nm-50nm, Rz is 20nm-100nm, and the glass panel is characterized by comprisingThe surface of the glass panel body having the etch pits had a resistivity of 1.0X 109Ω-9.9×1012Omega, the mole content of the hydroxyl hydrophilic group on the surface of one side of the glass panel body with the corrosion pits is 0.001-0.1%.
2. The glass panel according to claim 1, wherein the glass panel has a surface roughness Ra of 10nm to 30nm and Rz of 20nm to 60nm on the side provided with the AF anti-fingerprint film.
3. The glass panel according to claim 1, wherein the glass panel body has a surface on the side having the etch pits with a roughness Ra of 5nm to 100nm and an Rz of 10nm to 500 nm.
4. The glass panel according to claim 1, wherein a silica layer is provided between the glass panel body and the AF anti-fingerprint film.
5. The glass panel according to claim 4, wherein the thickness of the silicon dioxide layer is in the range of 0.1nm to 500 nm.
6. A method of making a glass panel, comprising:
after the glass panel body is chemically strengthened, carrying out surface activation by adopting a chemical etching method to form corrosion pits on the surface of the glass panel body, wherein the surface roughness Ra of the glass panel body is controlled within the range of 5nm-100nm, and the Rz is controlled within the range of 10nm-500 nm;
preparing an AF anti-fingerprint film on the surface of the activated glass panel body with the etch pits, wherein the surface roughness Ra of the glass panel after the AF anti-fingerprint film is prepared is 8-50 nm, Rz is 20-100 nm, and the resistivity of the surface of one side of the glass panel body with the etch pits is 1.0 multiplied by 109Ω-9.9×1012Omega, the mole content of the hydroxyl hydrophilic group on the surface of one side of the glass panel body with the corrosion pit is 0.001-0.1%.
7. The preparation method according to claim 6, wherein the chemical etching method comprises alkali etching and/or acid etching, the etching temperature is 23-99 ℃, and the etching time is 1min-24 h.
8. The method according to claim 7, wherein the alkali etching is performed by immersing in an alkali activating solution, the alkali activating solution comprises an alkali metal hydroxide and/or an alkali metal salt of a weak acid, and water and/or an organic solvent, and the pH of the alkali activating solution is in a range of 8 to 14.
9. The method according to claim 7, wherein the acid etching is performed by using an acidic activating solution, the acidic activating solution includes a hydrofluoric acid or ammonium fluoride modified solvent, and the pH of the acidic activating solution is in a range of 1 to 6.
10. The method according to claim 6, wherein the AF anti-fingerprint film is prepared by means of thermal evaporation or spray coating.
11. The method according to claim 6, further comprising forming a silica layer on the surface of the glass panel body before forming the AF anti-fingerprint film.
12. The method of claim 11, wherein the silicon dioxide layer has a thickness in a range of 0.1nm to 500 nm.
13. A display screen, which is characterized by comprising a display screen module and a glass panel covered on the display screen module, wherein the glass panel is the glass panel in any one of claims 1 to 5.
14. A terminal, comprising a housing assembled outside said terminal, and a circuit board inside said housingThe casing comprises a display screen assembled on the front side, the display screen comprises a glass panel and a display module arranged on the inner side of the glass panel, the glass panel comprises a glass panel body and an AF fingerprint-proof film arranged on the surface of one side, facing the outer side of the terminal, of the glass panel body, one side, close to the AF fingerprint-proof film, of the glass panel body is provided with corrosion pits, the surface roughness Ra of one side, provided with the AF fingerprint-proof film, of the glass panel body is 8-50 nm, Rz is 20-100 nm, and the resistivity of the surface of one side, provided with the corrosion pits, of the glass panel body is 1.0 x 109Ω-9.9×1012Omega, the mole content of the hydroxyl hydrophilic group on the surface of one side of the glass panel body with the corrosion pits is 0.001-0.1%.
15. The terminal according to claim 14, wherein the glass panel has a surface roughness Ra of 10nm to 30nm and Rz of 20nm to 60nm on the side provided with the AF anti-fingerprint film.
16. A terminal as in claim 14, wherein the glass panel body has a side surface with etch pits having a roughness Ra of 5nm to 100nm and an Rz of 10nm to 500 nm.
17. The terminal of claim 14, wherein a silicon dioxide layer is disposed between the glass panel body and the AF anti-fingerprint film.
18. The terminal of claim 17, wherein the silicon dioxide layer has a thickness in the range of 0.1nm to 500 nm.
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