Glass cover plate and its preparation method, glass etching solution and electronic equipment

Abstract

This application provides a glass cover plate, its preparation method, a glass etching solution, and an electronic device. The glass cover plate of this application includes a plurality of glass protrusions located on the surface of the glass cover plate, wherein the width s of the glass protrusions ranges from 20 nm to 80 nm. The glass cover plate provided in this application has low reflectivity and high transmittance.

Description

Technical Field

[0001] This application relates to the field of electronics, specifically to a glass cover plate and its preparation method, a glass etching solution, and an electronic device. Background Technology

[0002] To improve the impact resistance of electronic device displays, protective glass covers are usually installed on the displays. However, existing protective glass covers have excessively high reflectivity and low transmittance, which affects the display effect of electronic device displays. Summary of the Invention

[0003] This application provides a glass cover plate with low reflectivity and high transmittance.

[0004] A first aspect of this application provides a glass cover plate, the glass cover plate including a plurality of glass protrusions located on the surface of the glass cover plate, the width s of the glass protrusions being in the range of 20nm≤s≤80nm.

[0005] A second aspect of this application provides a glass etching solution, which comprises, by mass fraction, 1.3% to 1.7% aluminum salt, inorganic acid, and the balance being water, and the pH value of the glass etching solution is in the range of 3 to 6.

[0006] A third aspect of this application provides a method for preparing a glass cover plate, comprising:

[0007] Provide glass substrates; and

[0008] The glass substrate is wet-etched using a glass etching solution to obtain the glass cover plate, wherein the glass cover plate includes a plurality of glass protrusions located on the surface of the glass cover plate, and the width s of the glass protrusions is in the range of 20nm≤s≤80nm.

[0009] A fourth aspect of this application provides an electronic device comprising:

[0010] Display screen;

[0011] The glass cover plate described in the embodiments of this application or the glass cover plate prepared by the method described in the embodiments of this application; and

[0012] A processor, electrically connected to the display screen, is used to control the display screen to perform a display.

[0013] The glass cover plate of this application embodiment includes a plurality of glass protrusions, the width of which ranges from 20nm to 80nm. This reduces the reflectivity of the glass cover plate surface to light and increases the light transmittance of the glass cover plate. Furthermore, it does not increase the haze of the glass cover plate. When the glass cover plate is used as a protective cover for the display screen of an electronic device, it enables the display screen to have a better display effect. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a glass cover plate according to an embodiment of this application.

[0016] Figure 2 This application describes a glass cover plate along... Figure 1 A schematic diagram of the cross-sectional structure along the AA direction.

[0017] Figure 3 This is another embodiment of the glass cover plate along the edge of the present application. Figure 1 A schematic diagram of the cross-sectional structure along the AA direction.

[0018] Figure 4 This is a schematic flowchart illustrating a method for preparing a glass cover plate according to an embodiment of this application.

[0019] Figure 5 This is a transmission electron microscope (TEM) image of the surface of a glass cover plate having a glass protrusion according to an embodiment of this application.

[0020] Figure 6 These are the transmittance curves of the glass covers obtained in Example 1, Comparative Example 2, and Comparative Example 3 at different wavelengths.

[0021] Figure 7 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application.

[0022] Figure 8 This is a partial exploded structural diagram of an electronic device according to an embodiment of this application.

[0023] Figure 9 This is a circuit block diagram of an electronic device according to an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100-Glass cover, 10-Glass protrusion, 200-Electronic device, 210-Display, 220-Mid-frame, 230-Processor, 240-Housing, 241-Light-transmitting part, 250-Memory, 270-Camera module. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0027] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0028] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0029] It should be noted that, for ease of explanation, the same reference numerals denote the same components in the embodiments of this application, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments.

[0030] Glass, with its high light transmittance, high hardness, high wear resistance, and good thermal and chemical stability, has become a primary material for electronic devices such as mobile phones. However, glass itself has limited transmittance, which affects some of the display's performance when used as a cover glass for a display screen. Forming a three-dimensional or linear network structure of nano-silica sol on glass using the sol-gel method can achieve a certain anti-reflective and light-reflective effect. However, the bond between this sol layer and the glass is not strong and it is prone to detachment, thus negating the anti-reflective and light-reflective effects.

[0031] Please see Figures 1 to 3 This application provides a glass cover plate 100, which includes a plurality of glass protrusions 10 located on the surface of the glass cover plate 100, wherein the width s of the glass protrusions 10 is in the range of 20nm≤s≤80nm.

[0032] In this application, the term "multiple" means two or more, or at least two.

[0033] The cover plate of this application embodiment can be applied to portable electronic devices such as mobile phones, tablets, laptops, desktop computers, smart bracelets, smartwatches, e-readers, and game consoles. The glass cover plate 100 can serve as the front cover or rear cover of the electronic device.

[0034] It should be noted that the glass protrusions 10 may be distributed on one or more surfaces of the glass cover plate 100, or on part or all of the surfaces of one surface of the glass cover plate 100. The specific distribution can be determined according to the actual application scenario. In the schematic diagram of this application, the glass protrusions 10 are distributed on one surface of the glass cover plate 100 as an example. This should not be construed as a limitation on the glass cover plate 100 provided in the embodiments of this application.

[0035] "Glass protrusion 10" refers to the structure formed by fitting a plane with the lowest point of the gap between all adjacent glass protrusions 10, and using the fitted plane as the reference plane. The protrusions that protrude from the reference plane are called glass protrusions 10.

[0036] Optionally, the plurality of glass protrusions 10 can be arranged closely together or spaced apart. It is understood that the plurality of glass protrusions 10 can be arranged non-periodically or periodically, and this application does not specifically limit this arrangement.

[0037] Optionally, the glass protrusion 10 may be in the form of a parabola, a hemispherical shape, or other shapes.

[0038] Understandably, the maximum width s of the orthographic projection of the glass protrusion 10 along the extension plane of the glass cover plate 100 is in the range of 20nm ≤ s ≤ 80nm. Specifically, the maximum width s of the orthographic projection of the glass protrusion 10 along the extension plane of the glass cover plate 100 can be, but is not limited to, 20nm, 25nm, 30nm, 35nm, 40nm, 45nm, 50nm, 55nm, 60nm, 65nm, 70nm, 75nm, 80nm, etc. If the size of the glass protrusion 10 is too large, the glass cover plate 100 is prone to whitening, increasing the haze of the glass cover plate 100. When the glass cover plate 100 is used as a protective cover for the display screen of an electronic device, it affects the display effect of the display screen. If the size of the glass protrusion 10 is too small, the anti-reflective effect of the glass cover plate 100 is reduced, or even non-existent, which is not conducive to improving the light transmittance of the glass cover plate 100.

[0039] Furthermore, the width s of the glass protrusion 10 is in the range of 30nm ≤ s ≤ 70nm. This allows the glass cover 100 to have lower haze while having lower reflectivity and higher light transmittance compared to the glass substrate used to prepare the glass cover 100.

[0040] Unless otherwise specified, the term "transmittance" in this application refers to visible light transmittance. The term "reflectance" unless otherwise specified refers to visible light reflectance.

[0041] It should be noted that the widths of the multiple glass protrusions 10 may be the same or different.

[0042] Understandably, the glass protrusion 10 is obtained by etching a glass substrate.

[0043] The glass cover 100 of this application embodiment includes a plurality of glass protrusions 10, the width of which ranges from 20nm to 80nm. This reduces the reflectivity of the surface of the glass cover 100 to light and increases the light transmittance of the glass cover 100. Furthermore, it does not increase the haze of the glass cover 100. When the glass cover 100 is used as a protective cover for the display screen of an electronic device, it enables the display screen to have a better display effect.

[0044] Furthermore, in this embodiment, the glass cover 100 has multiple glass protrusions 10 directly formed on the glass substrate, forming a single integrated structure. This ensures that it will not delaminate even after prolonged use, resulting in a longer service life. Moreover, the glass cover 100 of this application has better hydrophobicity than flat glass, thus providing better fingerprint and stain resistance. Furthermore, the glass cover 100 also exhibits higher wear resistance compared to flat glass.

[0045] In some embodiments, the distance d between two adjacent glass protrusions 10 ranges from 0 to 150 nm. Understandably, the distance between the bottoms of two adjacent glass protrusions 10 ranges from 0 to 150 nm. Specifically, the distance d between two adjacent glass protrusions 10 can be, but is not limited to, 0, 3 nm, 5 nm, 8 nm, 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 90 nm, 100 nm, 110 nm, 120 nm, 130 nm, 140 nm, 150 nm, etc. If the distance between two adjacent glass protrusions 10 is too large, it increases the reflectivity of the glass cover 100 and reduces its light transmittance. When applied as a protective cover for a display screen, this affects the display effect.

[0046] Furthermore, the distance d between two adjacent glass protrusions 10 is in the range of 0 ≤ d ≤ 130 nm. This allows the glass cover 100 to have lower reflectivity and higher light transmittance, as well as better fingerprint and stain resistance.

[0047] Furthermore, the distance d between two adjacent glass protrusions 10 is in the range of 0 ≤ d ≤ 100 nm. This allows the glass cover 100 to have lower reflectivity and higher light transmittance, as well as better fingerprint and stain resistance.

[0048] It should be noted that the spacing between two adjacent glass protrusions 10 can be the same or different.

[0049] In some embodiments, the height h of the glass protrusion 10 is in the range of 10nm ≤ h ≤ 18nm. Specifically, the height h of the glass protrusion 10 can be, but is not limited to, 10nm, 11nm, 12nm, 13nm, 14nm, 15nm, 16nm, 17nm, 18nm, etc. If the height of the glass protrusion 10 is too high, the glass cover plate 100 requires a longer etching or reaction time during preparation, making the resulting glass cover plate 100 prone to color interference, causing the glass cover plate 100 to appear yellow or even purple, which affects the display effect when applied to a display screen. If the height of the glass protrusion 10 is too low, the anti-reflection effect of the glass cover plate 100 is reduced, which is not conducive to improving the light transmittance of the glass cover plate 100.

[0050] It should be noted that the heights of the plurality of glass protrusions 10 may be the same or different.

[0051] Furthermore, the height h of the glass protrusion 10 is in the range of 13nm ≤ h ≤ 17nm. This allows the glass cover 100 to have high light transmittance without causing color interference, and also provides good anti-fingerprint and anti-smudge effects.

[0052] In some embodiments, the surface roughness Ra of the glass cover plate 100 having the plurality of glass protrusions 10 ranges from 5nm ≤ Ra ≤ 14nm. Specifically, the surface roughness Ra of the glass cover plate 100 having the plurality of glass protrusions 10 can be, but is not limited to, 5nm, 6nm, 7nm, 8nm, 9nm, 10nm, 11nm, 12nm, 13nm, and 14nm. If the surface roughness Ra of the glass cover plate 100 having the plurality of glass protrusions 10 is too large, the glass cover plate 100 is prone to whitening, increasing the haze of the glass cover plate 100, which affects the display effect of the display screen when the glass cover plate 100 is used as a protective cover for the display screen of an electronic device; if the surface roughness Ra of the glass cover plate 100 having the plurality of glass protrusions 10 is too small, the anti-reflection effect of the glass cover plate 100 is reduced, or even non-existent, which is not conducive to improving the light transmittance of the glass cover plate 100.

[0053] Furthermore, the surface roughness Ra of the glass cover plate 100 having the plurality of glass protrusions 10 is in the range of 6nm ≤ Ra ≤ 13nm. This allows the glass cover plate 100 to have low haze while having high light transmittance.

[0054] In some embodiments, the glass cover 100 comprises aluminum ions (Al). 3+ From the surface of the glass cover 100 towards the center, the concentration of aluminum ions in the glass cover 100 gradually decreases. The glass cover 100 of this application is obtained by etching a glass substrate with a glass etching solution. The glass etching solution containing aluminum ions replaces sodium and potassium ions in the glass substrate, thereby forming multiple glass protrusions 10 on the surface of the glass cover 100. This results in a gradual decrease in the concentration of aluminum ions from the surface towards the center of the glass cover 100. By controlling the etching depth and ensuring a gradual decrease in the concentration of aluminum ions from the surface to the center, the resulting glass cover 100 can have an anti-reflective effect, thus achieving high light transmittance without increasing haze.

[0055] In some embodiments, the glass cover 100 includes sodium ions (Na+). +From the surface of the glass cover 100 towards the center, the concentration of sodium ions in the glass cover 100 gradually increases. The glass cover 100 of this application is obtained by etching a glass substrate with a glass etching solution. The glass etching solution containing aluminum ions replaces sodium and potassium ions in the glass substrate, thereby forming multiple glass protrusions 10 on the surface of the glass cover 100. This results in a gradual increase in the concentration of sodium ions from the surface towards the center of the glass cover 100. By controlling the etching depth and ensuring a gradual increase in sodium ion concentration from the surface to the center, the resulting glass cover 100 can have an anti-reflective effect, thus achieving high light transmittance without increasing haze.

[0056] In some embodiments, the glass cover 100 includes potassium ions (K ions). + From the surface of the glass cover 100 towards the center, the concentration of potassium ions in the glass cover 100 gradually increases. The glass cover 100 of this application is obtained by etching a glass substrate with a glass etching solution. The glass etching solution containing aluminum ions replaces sodium and potassium ions in the glass substrate, thereby forming multiple glass protrusions 10 on the surface of the glass cover 100. This results in a gradual increase in the concentration of potassium ions from the surface towards the center of the glass cover 100. By controlling the etching depth and ensuring a gradual increase in potassium ion concentration from the surface to the center, the resulting glass cover 100 can have an anti-reflective effect, thus achieving high light transmittance without increasing haze.

[0057] In some embodiments, the mass fraction of aluminum ions in the glass cover 100 gradually decreases from 32% to 27% in the direction from the surface of the glass cover 100 towards the center of the glass cover 100. It can be understood that the mass fraction of aluminum ions in the glass cover 100 can gradually decrease within any two values ​​between 27% and 32% in the direction from the surface to the center of the glass cover 100. Specifically, the mass fraction of aluminum ions in the glass cover 100 can be any two values ​​from 27%, 28%, 29%, 30%, 31%, 32%, etc. The glass cover 100 of this application uses a glass etching solution containing aluminum ions to replace sodium and potassium ions in the glass substrate, thereby forming multiple glass protrusions 10 on the surface of the glass cover 100. The mass fraction of aluminum ions in the glass cover 100 gradually decreases from 32% to 27% from the surface to the center. By controlling the etching depth and the range of aluminum ion concentration, the obtained glass cover 100 can have an anti-reflection effect, thereby having high light transmittance and no increase in haze.

[0058] In the embodiments of this application, when the numerical range a to b is involved, unless otherwise specified, the numerical value can be any value between a and b, including the endpoint value a and the endpoint value b.

[0059] Unless otherwise specified, the terms "content", "concentration", and "percentage" used in this application refer to mass fraction.

[0060] In some embodiments, from the surface of the glass cover 100 towards the center of the glass cover 100, the mass fraction of sodium ions in the glass cover 100 gradually increases from 4.8% to 9.2%. The glass cover 100 of this application uses a glass etching solution containing sodium ions to replace sodium and potassium ions in the glass substrate, thereby forming multiple glass protrusions 10 on the surface of the glass cover 100. This results in the mass fraction of sodium ions in the glass cover 100 gradually increasing from 4.8% to 9.2% from the surface towards the center. By controlling the etching depth and the range of sodium ion concentration variation, the resulting glass cover 100 can have an anti-reflective effect, thereby achieving high light transmittance without increasing haze.

[0061] In some embodiments, the mass fraction of potassium ions in the glass cover 100 gradually increases from 0.02% to 1% in the direction from the surface of the glass cover 100 towards the center of the glass cover 100. The glass cover 100 of this application uses a glass etching solution containing potassium ions to replace potassium ions and potassium ions in the glass substrate, thereby forming multiple glass protrusions 10 on the surface of the glass cover 100. This results in the mass fraction of potassium ions in the glass cover 100 gradually increasing from 0.02% to 1% in the direction from the surface to the center of the glass cover 100. By controlling the etching depth and the range of potassium ion concentration variation, the resulting glass cover 100 can have an anti-reflective effect, thereby achieving high light transmittance without increasing haze.

[0062] In some embodiments, the glass cover 100 of this application embodiment, by providing a plurality of glass protrusions 10, can increase the light transmittance of the glass cover 100 compared to the glass substrate on which it is made, without increasing the haze, and also makes the glass cover 100 have a higher water droplet angle (i.e., water contact angle) and abrasion resistance compared to the glass substrate on which it is made. For example, the light transmittance is increased from 92% to 95% to 96%, but the haze remains the same as that of the glass substrate, at approximately 0.1%; the water droplet angle is increased from 101° to 117.26°.

[0063] Optionally, the haze of the glass cover 100 in this embodiment is less than or equal to 0.1%, and the water droplet angle is greater than or equal to 115°.

[0064] This application embodiment also provides a glass etching solution, which comprises, by mass fraction: 1.3% to 1.7% aluminum salt, inorganic acid, and the balance being water, and the pH value of the glass etching solution is in the range of 3 to 6.

[0065] The inorganic acid in the glass etching solution of this application is used to provide hydrogen ions (H+). + Aluminum salts are used to provide aluminum ions, and this glass etching solution is used to etch the glass substrate. During etching, hydrogen ions (H+) dissociate from the glass etching solution. + ) undergoes ion exchange with the silicon-oxygen network in the glass substrate, supplemented by alkali metal cations or alkaline earth metal cations (chemical reaction formula: ΞSi-O-Na+H) + —>ΞSi-OH+Na + This results in an uneven structure being formed on the surface of the glass substrate due to the presence of Al in the glass etching solution. 3+ The presence of Al, combined with the reaction product OH-, promotes the reaction to proceed continuously to the right. 3+ The presence of this ensures that the pH of the solution is not too high, thus preventing damage to the silicon-oxygen network, while also allowing Al to be absorbed. 3+ By introducing non-bridging oxygen into the glass, aluminum-oxygen tetrahedra are formed, making the glass network skeleton firmly bonded and the structure compact.

[0066] Specifically, the mass fraction of aluminum salt in the glass etching solution can be, but is not limited to, 1.3%, 1.35%, 1.4%, 1.45%, 1.5%, 1.55%, 1.6%, 1.65%, 1.7%, etc. If the mass fraction of aluminum salt is too low, the etching speed will be too slow when using this glass etching solution to etch the glass substrate, affecting production efficiency, and the etching depth will be insufficient, making it difficult for the glass cover 100 to have an anti-reflective and anti-reflective effect compared to the glass substrate, without affecting the haze of the glass cover 100. If the mass fraction of aluminum salt is too high, the etching speed will be too fast when using this glass etching solution to etch the glass substrate, the reaction will be too violent, easily producing step-like textures, and the resulting glass cover 100 will easily produce interference colors, easily turning yellow or even purple, affecting the display effect when used as a protective cover for the display screen of electronic devices.

[0067] Specifically, the pH value of the glass etching solution can be, but is not limited to, 3, 4, 5, 6, etc. If the pH value is too high, when the glass substrate is etched with the glass etching solution, the Si-O-Si chains that play a role in the skeletal network in the glass substrate will be decomposed and broken by hydroxide ions, which will destroy the structure of the formed glass protrusion 10, and the resulting glass cover plate 100 will not have the effect of anti-reflection and anti-reflection. If the pH value of the glass etching solution is too low, the reaction speed between the glass etching solution and the glass substrate will be too fast, and it will be impossible to produce an uneven structure, so it will be impossible to obtain a glass cover plate 100 with anti-reflection and anti-reflection effect and unchanged haze.

[0068] The glass etching solution of this application can be used to etch a glass substrate to obtain a glass cover plate 100 with multiple glass protrusions 10 on the surface, and the obtained glass cover plate 100 has an anti-reflection and anti-transparency effect compared with the glass substrate, and the haze is almost unchanged. In addition, the obtained glass cover plate 100 can also have a higher water droplet angle and higher wear resistance.

[0069] In some embodiments, the aluminum salt is a water-soluble aluminum salt. The aluminum salt includes at least one of aluminum chloride and aluminum nitrate. These aluminum salts are readily soluble in water, inexpensive, and provide a better supply of free aluminum ions.

[0070] In some embodiments, the glass etching solution further includes a pH buffer. The pH buffer can buffer the pH of the glass etching solution, maintaining the pH value between 3 and 6, thereby greatly improving the duration of the efficacy of the glass etching solution.

[0071] Optionally, the mass fraction of the pH buffer is 3.99% to 4.62%. Specifically, the mass fraction of the pH buffer in the glass etching solution can be, but is not limited to, 3.99%, 4.0%, 4.1%, 4.2%, 4.3%, 4.4%, 4.5%, 4.55%, 4.62%, etc. If the mass fraction of the pH buffer in the glass etching solution is too low, the pH buffering capacity is insufficient, reducing the effectiveness time of the glass etching solution; if the mass fraction of the pH buffer in the glass etching solution is too high, the pH value of the glass etching solution is too low, the reaction rate between the glass etching solution and the glass substrate is too fast, and the uneven structure cannot be generated, thus failing to obtain a glass cover plate 100 with anti-reflection and anti-reflection effects and unchanged haze.

[0072] Optionally, the pH buffer includes at least one of sodium acetate, sodium oxalate, sodium citrate, and disodium ethylenediaminetetraacetate (EDTA disodium). Using these pH buffers can better maintain the pH value of the glass etching solution, thereby increasing the effectiveness time and service life of the glass etching solution.

[0073] In one specific embodiment, the pH buffer is sodium acetate, sodium oxalate, and sodium citrate.

[0074] In some embodiments, the inorganic acid includes at least one selected from phosphoric acid, nitric acid, sulfuric acid, and hydrochloric acid. These inorganic acids can provide free hydrogen ions (H+). + It can better exchange ions with alkali metal cations or alkaline earth metal cations in the glass substrate, and better form the glass protrusion 10.

[0075] In one specific embodiment, the inorganic acid is 85% phosphoric acid and 68% nitric acid.

[0076] Optionally, the mass fraction of the inorganic acid in the glass etching solution ranges from 0.172% to 0.233%. Specifically, the mass fraction of the inorganic acid in the glass etching solution can be, but is not limited to, 0.172%, 0.176%, 0.18%, 0.19%, 0.20%, 0.21%, 0.22%, 0.23%, 0.233%, etc. If the mass fraction of the inorganic acid is too small, the pH value will be too high, and the Si-O-Si chains that play a skeletal network role in the glass substrate will be decomposed and broken by hydroxide ions. If the mass fraction of the inorganic acid is too small, the pH value of the glass etching solution will be too low, and the reaction rate between the glass etching solution and the glass substrate will be too fast, making it impossible to produce an uneven structure, thus failing to obtain a glass cover plate 100 with anti-reflection and anti-reflection effects and unchanged haze.

[0077] In some embodiments, the glass etching solution comprises, by mass fraction: 1.3% to 1.7% aluminum salt, 3.6% to 4% sodium acetate, 0.23% to 0.4% sodium oxalate, 0.16% to 0.22% sodium citrate, 0.076% to 0.13% phosphoric acid, 0.095% to 0.18% nitric acid, with the balance being water. When using the glass etching solution of this embodiment to etch a glass substrate to prepare a glass cover plate 100, the surface of the resulting glass cover plate 100 can have multiple glass protrusions 10, the width of which ranges from 20 nm to 80 nm. This reduces the surface reflectivity of the glass cover plate 100 and increases its light transmittance. Furthermore, it does not increase the haze of the glass cover plate 100. When the glass cover plate 100 is used as a protective cover for the display screen of an electronic device, it results in a better display effect.

[0078] Further, the glass etching solution comprises, by mass fraction: 1.3% to 1.7% aluminum salt, 3.6% to 4% sodium acetate, 0.23% to 0.4% sodium oxalate, 0.16% to 0.22% sodium citrate, 0.09% to 0.13% phosphoric acid (85%), 0.095% to 0.18% nitric acid (68%), with the balance being water. When the glass etching solution formulated in this embodiment is used to etch a glass substrate to obtain a glass cover plate 100, it can have a better anti-reflective and anti-reflective effect, and the haze remains almost unchanged. In addition, it can also improve the water droplet angle and abrasion resistance of the glass cover plate 100.

[0079] The glass cover plate 100 of this application embodiment can be prepared by the method described in the following embodiments of this application. In addition, it can also be prepared by other methods. The preparation method of this application embodiment is only one or more preparation methods of the glass cover plate 100 of this application and should not be construed as a limitation on the glass cover plate 100 provided in the embodiments of this application.

[0080] Please see Figure 4 This application also provides a method for preparing a glass cover plate 100, which includes:

[0081] S201, providing a glass substrate; and

[0082] Optionally, the glass substrate may be, but is not limited to, high-alumina-silicon glass.

[0083] Optionally, the glass substrate can be 3D clear glass, which is obtained by using flat glass through processes such as cutting, opening, fine finishing, side polishing, 3D hot bending, and polishing.

[0084] In some embodiments, the glass substrate is also tempered and cleaned before wet etching.

[0085] S202, the glass substrate is wet-etched using a glass etching solution to obtain the glass cover plate 100, wherein the glass cover plate 100 includes a plurality of glass protrusions 10 located on the surface of the glass cover plate 100, and the width s of the glass protrusions 10 is in the range of 20nm≤s≤80nm.

[0086] In some embodiments, after wet etching, the method further includes spraying or vapor-depositing an anti-fingerprint film (AF film) on the glass cover plate 100.

[0087] Optionally, the glass substrate is immersed in a glass etching solution to perform wet etching on the glass substrate to obtain the glass cover plate 100.

[0088] Optionally, the immersion time (i.e., etching time) can be 5 to 10 minutes. Specifically, the immersion time of the glass substrate can be, but is not limited to, 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes, 10 minutes, etc. If the immersion time of the glass substrate is too short, the etching depth of the glass substrate will be shallow, and the anti-reflection and anti-reflection effects of the resulting glass cover 100 will not be obvious compared to the glass substrate. If the immersion time of the glass substrate is too long, interference colors may appear on the surface of the resulting glass cover 100, such as causing the glass cover 100 to turn yellow or purple, thereby affecting the display effect of the display screen when the glass cover 100 is applied to the display screen. In addition, if the immersion time is too long, the height of the resulting glass protrusion 10 will be too high, reducing the anti-reflection and anti-reflection effects of the glass cover 100, and reducing the light transmittance and wear resistance of the glass cover 100.

[0089] Optionally, the etching temperature (i.e., the temperature of the glass etching solution during immersion) ranges from 20° to 30°. Specifically, the etching temperature can be, but is not limited to, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, etc. If the etching temperature is too low, the reaction speed of the glass substrate is too slow, the etching depth is shallow, and the resulting glass cover 100 has an insignificant anti-reflection and anti-reflection effect compared to the glass substrate. If the etching temperature is too high, the etching speed is too fast, the reaction is too violent, and step-like textures are easily generated. Furthermore, the resulting glass cover 100 is prone to interference colors, easily turning yellow or even purple, which affects the display effect when used as a protective cover for the display screen of electronic devices.

[0090] For descriptions of the same features as those in the above embodiments, please refer to the descriptions of the corresponding parts in the above embodiments, which will not be repeated here.

[0091] The glass cover 100 prepared by the method of this application embodiment includes a plurality of glass protrusions 10, the width of which ranges from 20 nm to 80 nm. This results in the glass cover 100 having a lower reflectivity and higher transmittance than the glass substrate. In addition, the glass cover 100 maintains a haze comparable to that of the glass substrate. When the glass cover 100 is used as a protective cover for the display screen of an electronic device, the display screen has a better display effect.

[0092] Optionally, the glass etching solution comprises, by mass fraction: 1.3% to 1.7% aluminum salt, inorganic acid, and the balance being water, and the pH value of the glass etching solution is in the range of 3 to 6.

[0093] The glass etching solution of this embodiment is used to etch the glass substrate. During etching, hydrogen ions (H+) dissociate from the glass etching solution. + ) and the silicon-oxygen network in the glass substrate with the addition of alkali metal cations or alkaline earth metal cations (e.g., Na in the glass substrate). + K + Ba 2+ With aluminum ions (Al) in the glass etching solution 3+ Displacement occurs; ion exchange occurs (chemical reaction formula: ΞSi-O-Na+H) + —>ΞSi-OH+Na + This results in an uneven structure being formed on the surface of the glass substrate due to the presence of Al in the glass etching solution. 3+ The presence of Al, combined with the reaction product OH-, promotes the reaction to proceed continuously to the right. 3+ The presence of this ensures that the pH of the solution is not too high, thus preventing damage to the silicon-oxygen network, while also allowing Al to be absorbed. 3+The process involves introducing non-bridging oxygen into the glass interior to form aluminum-oxygen tetrahedra, resulting in a strong and compact glass network framework. Therefore, after etching with the glass etching solution, the sodium and potassium content within the glass cover 100 decreases, with the concentration gradually increasing from the surface inwards. The barium (Ba) content also decreases or even disappears, while the aluminum content increases. In this embodiment, the glass cover 100 is subjected to focused ion beam (FIB) cutting at the glass protrusion 10 (i.e., the immersion area). The surface structure of the glass cover 100 is observed using a transmission electron microscope. Figure 5 This is a transmission electron microscope (TEM) image of a glass cover plate 100 prepared according to an embodiment of this application.

[0094] The glass cover 100 is prepared by etching the glass substrate using the glass etching solution of this embodiment. The resulting glass cover 100 has a lower reflectivity and a higher transmittance than the glass substrate. In addition, the glass cover 100 maintains a haze comparable to that of the glass substrate. When the glass cover 100 is used as a protective cover for the display screen of an electronic device, the display screen has a better display effect.

[0095] In some embodiments, the aluminum salt is a water-soluble aluminum salt. The aluminum salt includes at least one of aluminum chloride and aluminum nitrate. These aluminum salts are readily soluble in water, inexpensive, and provide a better supply of free aluminum ions.

[0096] In some embodiments, the glass etching solution further includes a pH buffer. The pH buffer can buffer the pH of the glass etching solution, maintaining the pH value between 3 and 6, thereby greatly improving the duration of the efficacy of the glass etching solution.

[0097] Optionally, the mass fraction of the pH buffer is 3.99% to 4.62%. Specifically, the mass fraction of the pH buffer in the glass etching solution can be, but is not limited to, 3.99%, 4.0%, 4.1%, 4.2%, 4.3%, 4.4%, 4.5%, 4.55%, 4.62%, etc. If the mass fraction of the pH buffer in the glass etching solution is too low, the pH buffering capacity is insufficient, reducing the effectiveness time of the glass etching solution; if the mass fraction of the pH buffer in the glass etching solution is too high, the pH value of the glass etching solution is too low, the reaction rate between the glass etching solution and the glass substrate is too fast, and the uneven structure cannot be generated, thus failing to obtain a glass cover plate 100 with anti-reflection and anti-reflection effects and unchanged haze.

[0098] Optionally, the pH buffer includes at least one of sodium acetate, sodium oxalate, sodium citrate, and disodium ethylenediaminetetraacetate (EDTA disodium). Using these pH buffers can better maintain the pH value of the glass etching solution, thereby increasing the effectiveness time and service life of the glass etching solution.

[0099] In one specific embodiment, the pH buffer is sodium acetate, sodium oxalate, and sodium citrate.

[0100] In some embodiments, the inorganic acid includes at least one selected from phosphoric acid, nitric acid, sulfuric acid, and hydrochloric acid. These inorganic acids can provide free hydrogen ions (H+), which can better exchange ions with alkali metal cations or alkaline earth metal cations in the glass substrate, thus better forming the glass protrusion 10.

[0101] In one specific embodiment, the inorganic acid is 85% phosphoric acid and 68% nitric acid.

[0102] Optionally, the mass fraction of the inorganic acid in the glass etching solution ranges from 0.172% to 0.233%. Specifically, the mass fraction of the inorganic acid in the glass etching solution can be, but is not limited to, 0.172%, 0.176%, 0.18%, 0.19%, 0.20%, 0.21%, 0.22%, 0.23%, 0.233%, etc. If the mass fraction of the inorganic acid is too small, the pH value will be too high, and the Si-O-Si chains that play a skeletal network role in the glass substrate will be decomposed and broken by hydroxide ions. If the mass fraction of the inorganic acid is too small, the pH value of the glass etching solution will be too low, and the reaction rate between the glass etching solution and the glass substrate will be too fast, making it impossible to produce an uneven structure, thus failing to obtain a glass cover plate 100 with anti-reflection and anti-reflection effects and unchanged haze.

[0103] In one specific embodiment, the glass etching solution comprises, by mass fraction: 1.3% to 1.7% aluminum salt, 3.6% to 4% sodium acetate, 0.23% to 0.4% sodium oxalate, 0.16% to 0.22% sodium citrate, 0.09% to 0.13% phosphoric acid (85%), 0.095% to 0.18% nitric acid (68%), with the balance being water. When the glass etching solution of this embodiment is used to etch a glass substrate to obtain a glass cover plate 100, it can have better anti-reflective and anti-reflective effects, and the haze remains almost unchanged. In addition, it can also improve the water droplet angle and abrasion resistance of the glass cover plate 100.

[0104] In some embodiments, the distance d between two adjacent glass protrusions 10 is in the range of 0 ≤ d ≤ 150 nm. If the distance between two adjacent glass protrusions 10 is too large, it increases the reflectivity of the glass cover 100 and reduces the light transmittance of the glass cover 100. When applied as a protective cover for a display screen, this affects the display effect of the display screen.

[0105] In some embodiments, the height h of the glass protrusion 10 is in the range of 10nm ≤ h ≤ 18nm. If the height of the glass protrusion 10 is too high, the glass cover 100 requires a longer etching or reaction time during fabrication, making the resulting glass cover 100 prone to color interference, causing the glass cover 100 to appear yellow or even purple, which affects the display effect when applied to a display screen. If the height of the glass protrusion 10 is too low, the anti-reflection effect of the glass cover 100 is reduced, which is not conducive to improving the light transmittance of the glass cover 100.

[0106] In some embodiments, the surface roughness Ra of the glass cover 100 having the plurality of glass protrusions 10 ranges from 5nm ≤ Ra ≤ 14nm. If the surface roughness Ra of the glass cover 100 having the plurality of glass protrusions 10 is too large, the glass cover 100 is prone to whitening, increasing the haze of the glass cover 100, which affects the display effect when the glass cover 100 is used as a protective cover for the display screen of an electronic device; if the surface roughness Ra of the glass cover 100 having the plurality of glass protrusions 10 is too small, the anti-reflection effect of the glass cover 100 is reduced, or even non-existent, which is not conducive to improving the light transmittance of the glass cover 100.

[0107] In some embodiments, the glass cover 100 includes aluminum ions (Al3+). From the surface of the glass cover 100 toward the center of the glass cover 100, the concentration of aluminum ions in the glass cover 100 gradually decreases, the concentration of sodium ions in the glass cover 100 gradually increases, and the concentration of potassium ions in the glass cover 100 gradually increases.

[0108] In some embodiments, from the surface of the glass cover 100 to the center of the glass cover 100, the mass fraction of aluminum ions in the glass cover 100 gradually decreases from 32% to 27%, the mass fraction of sodium ions in the glass cover 100 gradually increases from 4.8% to 9.2%, and the mass fraction of potassium ions in the glass cover 100 gradually increases from 0.02% to 1%.

[0109] For descriptions of the same features as those in the above embodiments, please refer to the descriptions of the corresponding parts in the above embodiments, which will not be repeated here.

[0110] The glass cover plate 100 of this application embodiment will be further described below through specific embodiments.

[0111] Example 1

[0112] The glass cover plate 100 in this embodiment is prepared by the following steps:

[0113] 1) Provides a glass substrate and a glass etching solution, wherein the glass etching solution comprises, by mass fraction, 1.5% aluminum salt, 3.8% sodium acetate, 0.3% sodium oxalate, 0.2% sodium citrate, 0.1% phosphoric acid, 0.13% nitric acid, and the balance being water; and

[0114] 2) The glass substrate is immersed in the glass etching solution at a temperature of 25°C for 8 minutes to obtain the glass cover plate 100. The parameters of the obtained glass cover plate 100 are shown in Table 1 below.

[0115] Comparative Example 1

[0116] The same glass substrate as in Example 1 was used as a comparative example.

[0117] Comparative Example 2 and Comparative Example 3

[0118] The glass cover plates 100 of each comparative example were prepared by the following steps:

[0119] 1) Provides a glass substrate and a glass etching solution, wherein the glass etching solution comprises, by mass fraction, 1.5% aluminum salt, 3.8% sodium acetate, 0.3% sodium oxalate, 0.2% sodium citrate, 0.1% phosphoric acid, 0.13% nitric acid, and the balance being water; and

[0120] 2) The glass substrate was immersed in the glass etching solution at a temperature of 25°C for etching to obtain the glass cover plate 100. The etching time of Comparative Example 2 was 25 min, and the etching time of Comparative Example 3 was 40 min. The parameters of the glass cover plates 100 obtained by Comparative Example 2 and Comparative Example 3 are shown in Table 1 below.

[0121] Various performance tests were conducted on the glass cover plate 100 of the embodiment and the glass substrates of each comparative example. The test results are shown in Table 1 below.

[0122] 1) Abrasion resistance test: Using 0000# steel wool, with a load of 1Kg, rub the glass cover plate 100 or glass substrate (size 2cm×2cm) back and forth, and measure the water droplet angle of the glass cover plate 100 or glass substrate after 10,000 rubs.

[0123] 2) Transmittance Measurement: Transmittance was measured using a transmittance meter. The transmittance curves of the glass cover plates 100 of Examples 1, 2, and 3 for different wavelengths of light are shown below. Figure 6As shown, the horizontal axis represents the wavelength of the light, and the vertical axis represents the transmittance of the light.

[0124] 3) Haze measurement: Haze is measured using a haze meter or haze gauge.

[0125] 4) Measurement of the dimensions of the glass protrusions: Measurements were performed using a transmission electron microscope.

[0126] Table 1 Performance parameters of each embodiment and comparative example

[0127]

[0128] As can be seen from the data of Example 1 and Comparative Example 1 in Table 1, when the glass substrate is etched using the glass etching solution of this application, the resulting glass cover plate 100 has a higher light transmittance than the glass substrate, and the haze remains basically unchanged. In addition, after 10,000 rubs, it has a higher water droplet angle, indicating that the glass cover plate 100 of this application embodiment has higher wear resistance than the glass substrate.

[0129] The test data from Examples 1, 2, and 3 show that when the etching time of the glass substrate is too long, the width and height of the glass protrusions in the resulting glass cover 100 are both too large, causing the glass cover 100 to appear yellow or purple. The light transmittance, water droplet angle, and abrasion resistance of the glass cover 100 will all decrease. Figure 6 It can be seen that the glass cover plate of Example 1 has a higher light transmittance in the visible light region compared with the glass cover plates of Comparative Example 1 and Comparative Example 2.

[0130] Please see Figures 7 to 9 This application also provides an electronic device 200, which includes a display screen 210, a glass cover plate 100 as described in the above embodiments of this application, and a processor 230. The processor 230 is electrically connected to the display screen 210 and is used to control the display screen 210 to display.

[0131] The electronic device 200 in this application embodiment can be, but is not limited to, a mobile phone, tablet computer, laptop computer, desktop computer, smart bracelet, smartwatch, e-reader, game console, or other portable electronic device 200.

[0132] Optionally, the glass cover 100 can be used as a protective cover for the display screen 210 or as a back cover for the electronic device 200. This application does not make specific limitations. In the embodiments and schematic diagrams of this application, the glass cover 100 is used as a protective cover for the display screen 210 as an example for illustration. It should not be construed as a limitation on the glass cover 100 in the embodiments of this application.

[0133] For a detailed description of the glass cover 100, please refer to the description of the corresponding part of the above embodiment, which will not be repeated here.

[0134] Optionally, the display screen 210 may be, but is not limited to, one or more of the following: liquid crystal display screen, light-emitting diode display screen (LED display screen), micro light-emitting diode display screen (Micro LED display screen), mini LED display screen, organic light-emitting diode display screen (OLED display screen).

[0135] Optionally, processor 230 includes one or more general-purpose processors, wherein the general-purpose processor can be any type of device capable of processing electronic instructions, including a central processing unit (CPU), microprocessor, microcontroller, main processor, controller, and ASIC, etc. Processor 230 is used to execute various types of digital storage instructions, such as software or firmware programs stored in memory, which enables the computing device to provide a wide range of services.

[0136] Optionally, the electronic device 200 of this application further includes a memory 250. The memory 250 is electrically connected to the processor 230 and is used to store the program code required for the processor 230 to run, the program code required to control the display screen 210, the display content of the display screen 210, etc.

[0137] Optionally, memory 250 may include volatile memory, such as random access memory (RAM); memory 250 may also include non-volatile memory (NVM), such as read-only memory (ROM), flash memory (FM), hard disk drive (HDD), or solid-state drive (SSD). Memory 250 may also include combinations of the above types of memory.

[0138] In some embodiments, the electronic device 200 of this application further includes a mid-frame 220, a housing 240, and a camera module 270. The mid-frame 220 is disposed on the side of the display screen 210 opposite to the glass cover plate 100, and the housing 240 is disposed on the side of the mid-frame opposite to the display screen (in other words, the glass cover plate 100, display screen 210, mid-frame 220, and housing 240 are stacked sequentially), and the side of the mid-frame 220 is exposed between the housing 240 and the display screen 210. The mid-frame 220 and the housing 240 enclose an accommodating space (not shown), which is used to accommodate the processor 230, the memory 250, and the camera module 270. The camera module 270 is electrically connected to the processor 230 and is used to take pictures under the control of the processor 230.

[0139] Optionally, the housing 240 has a light-transmitting portion 241, through which the camera module 270 can capture images. That is, in this embodiment, the camera module 270 is a rear-facing camera module. It is understood that in other embodiments, the light-transmitting portion 241 may be disposed on the display screen 210, i.e., the camera module 270 is a front-facing camera module 270. In the schematic diagram of this embodiment, the light-transmitting portion 241 is shown as an opening. In other embodiments, the light-transmitting portion 241 may not be an opening, but may be made of a light-transmitting material, such as plastic or glass.

[0140] It is understood that the electronic device 200 described in this embodiment is merely one form of the electronic device 200 used on the glass cover plate 100, and should not be construed as a limitation on the electronic device 200 provided in this application, nor should it be construed as a limitation on the glass cover plate 100 provided in various embodiments of this application.

[0141] In this application, the terms "embodiment" and "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of these phrases in various locations throughout the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described in this application can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the various embodiments of this application can be arbitrarily combined to form yet another embodiment that does not depart from the spirit and scope of the technical solution of this application, provided there is no contradiction between them.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A glass cover plate, characterized in that, The glass cover includes a plurality of glass protrusions located on the surface of the glass cover, wherein the width s of the glass protrusions is in the range of 20nm≤s≤80nm; the height h of the glass protrusions is in the range of 10nm≤h≤18nm; and the water droplet angle of the surface of the glass cover having the glass protrusions is greater than or equal to 115°. The glass cover plate contains aluminum ions, sodium ions, and potassium ions. From the surface of the glass cover plate towards the center of the glass cover plate, the concentration of aluminum ions gradually decreases, the concentration of sodium ions gradually increases, and the concentration of potassium ions gradually increases. The haze of the glass cover plate is less than or equal to 0.1%.

2. The glass cover plate according to claim 1, characterized in that, The distance d between two adjacent glass protrusions is in the range of 0 ≤ d ≤ 150 nm.

3. The glass cover plate according to claim 1, characterized in that, The surface roughness Ra of the glass cover plate having the plurality of glass protrusions ranges from 5 nm to Ra to 14 nm.

4. The glass cover plate according to any one of claims 1-3, characterized in that, From the surface of the glass cover plate towards the center of the glass cover plate: the mass fraction of aluminum ions in the glass cover plate gradually decreases from 32% to 27%, the mass fraction of sodium ions in the glass cover plate gradually increases from 4.8% to 9.2%, and the mass fraction of potassium ions in the glass cover plate gradually increases from 0.02% to 1%.

5. The glass cover plate according to any one of claims 1-3, characterized in that, The glass cover is obtained by etching a glass substrate with a glass etching solution; the glass etching solution comprises, by mass fraction, 1.3% to 1.7% aluminum salt, inorganic acid, and the balance being water, and the pH value of the glass etching solution is in the range of 3 to 6; the inorganic acid includes at least one of phosphoric acid, nitric acid, sulfuric acid, and hydrochloric acid, and the mass fraction of the inorganic acid in the glass etching solution is in the range of 0.172% to 0.233%.

6. The glass cover plate according to claim 5, characterized in that, The aluminum salt includes at least one of aluminum chloride and aluminum nitrate.

7. The glass cover plate according to claim 5, characterized in that, The glass etching solution further includes a pH buffer, the pH buffer having a mass fraction of 3.99% to 4.62%; the pH buffer includes at least one of sodium acetate, sodium oxalate, sodium citrate, and disodium EDTA.

8. The glass cover plate according to claim 5, characterized in that, The glass etching solution comprises, by mass fraction: 1.3% to 1.7% aluminum salt, 3.6% to 4% sodium acetate, 0.23% to 0.4% sodium oxalate, 0.16% to 0.22% sodium citrate, 0.076% to 0.13% phosphoric acid, 0.095% to 0.18% nitric acid, with the balance being water.

9. A method for preparing a glass cover plate, characterized in that, include: Provide glass substrates; as well as The glass substrate is wet-etched using a glass etching solution to obtain the glass cover plate. The glass cover plate includes a plurality of glass protrusions located on its surface. The width s of the glass protrusions ranges from 20 nm to 80 nm; the height h of the glass protrusions ranges from 10 nm to 18 nm; and the water droplet angle of the surface of the glass cover plate having the glass protrusions is greater than or equal to 115°. The glass cover plate contains aluminum ions, sodium ions, and potassium ions. From the surface of the glass cover plate towards the center of the glass cover plate, the concentration of aluminum ions gradually decreases, the concentration of sodium ions gradually increases, and the concentration of potassium ions gradually increases. The haze of the glass cover plate is less than or equal to 0.1%.

10. An electronic device, characterized in that, include: Display screen; The glass cover plate according to any one of claims 1-4 or the glass cover plate according to claim 9 is prepared by the method thereof; as well as A processor, electrically connected to the display screen, is used to control the display screen to perform a display.

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