Glass product and electronic device

Abstract

The present disclosure provides a glass product (200) and an electronic device. The glass product comprises a glass substrate (10), the glass substrate (10) has a first surface (101) and a second surface (102) which are arranged opposite to each other, a superhard film (20) is arranged on the first surface (101), and a brightness enhancement film (50) is arranged on the second surface (102), wherein the reflectivity of the brightness enhancement film (50) is greater than or equal to 25%, and the light transmittance of the superhard film (20) is greater than or equal to 50%.

Description

Glass product and electronic device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 28, 2023, with application number 202323667790.2 and application name “A Glass Product and Electronic Device”, the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0002] The present disclosure relates to the technical field of decorative glass, and in particular to a glass product and an electronic device. Background Art

[0003] Glass is a common material for the back covers of electronic devices such as mobile phones. In order to enhance the aesthetics of the back covers, various coatings and decorations are applied to the glass substrate. The most common method is to make an ultra-hard film on one side of the glass substrate (usually the outer side) to increase the decorative effect while also improving the hardness of the back cover and increasing its wear resistance. However, after the ultra-hard film is coated on one side of the glass substrate, its strength is severely reduced compared to the uncoated glass substrate, and the percentage of reduction is usually more than 30%, which in turn affects the drop resistance of the electronic device. In addition, when the existing glass products with ultra-hard film coated on one side reach a higher brightness, the thickness of the ultra-hard film will be too thick, which increases the production cost and results in poor color adjustability of the glass products.

[0004] Summary of the Invention

[0005] In light of this, the present disclosure provides a glass product and electronic device. By applying a superhard coating and a brightness-enhancing film on opposite sides of a glass substrate, the glass product achieves excellent wear resistance while maintaining a significant strength loss and a wide color adjustment range thanks to the synergistic effect of the brightness-enhancing film and the superhard coating.

[0006] Specifically, the first aspect of the present disclosure provides a glass product, which includes a glass substrate having a first surface and a second surface arranged opposite to each other, a superhard film provided on the first surface, and a brightness enhancing film provided on the second surface; wherein the reflectivity of the brightness enhancing film is greater than or equal to 25%, and the transmittance of the superhard film is greater than or equal to 50%.

[0007] In the embodiment of the present disclosure, the thickness d1 of the brightness enhancement film and the thickness d2 of the superhard film satisfy the following relationship: 0.4d2≤d1<d2.

[0008] In an embodiment of the present disclosure, the thickness of the superhard film is greater than or equal to 600 nm.

[0009] In an embodiment of the present disclosure, the pencil hardness of the brightness enhancement film is above 5H.

[0010] In the embodiment of the present disclosure, the pencil hardness of the superhard film is 9H; the Mohs hardness of the superhard film reaches 7 or above.

[0011] In an embodiment of the present disclosure, the brightness enhancing film includes a laminated structure formed by alternating stacking of a first high refractive index material layer and a first low refractive index material layer; wherein the refractive index of the first high refractive index material layer is greater than or equal to 2.0, and the refractive index of the first low refractive index material layer is less than or equal to 1.55.

[0012] In an embodiment of the present disclosure, the first high refractive index material layer includes one of a niobium pentoxide layer, a titanium dioxide layer, a titanium pentoxide layer, a niobium nitride layer or a titanium boride layer; the first low refractive index material layer includes one of a silicon dioxide layer, an aluminum oxide layer or a magnesium fluoride layer.

[0013] In the embodiment of the present disclosure, the first high refractive index material layer is a niobium pentoxide layer, and the first low refractive index material layer is a silicon dioxide layer.

[0014] In an embodiment of the present disclosure, the brightness enhancement film further includes an indium layer, and the indium layer is located between any adjacent first high-refractive-index material layer and first low-refractive-index material layer.

[0015] In an embodiment of the present disclosure, the superhard film includes a laminated structure formed by alternating stacking of a first superhard high-refractive index material layer and a second low-refractive index material layer; wherein the refractive index of the first superhard high-refractive index material layer is greater than or equal to 1.65, and the refractive index of the second low-refractive index material layer is less than or equal to 1.55.

[0016] In an embodiment of the present disclosure, the first ultra-hard high refractive index material layer includes one of a silicon nitride layer, a zirconium dioxide layer, an aluminum nitride layer, a silicon oxynitride layer, or an aluminum oxynitride layer; the second low refractive index material layer includes a silicon dioxide layer or an aluminum oxide layer.

[0017] In an embodiment of the present disclosure, the first ultra-hard high-refractive-index material layer is a silicon nitride layer, and the second low-refractive-index material layer is a silicon dioxide layer.

[0018] In the embodiment of the present disclosure, an anti-fingerprint layer is further provided on the side of the superhard film facing away from the glass substrate; and an ink layer is further provided on the side of the brightness enhancement film facing away from the glass substrate.

[0019] In an embodiment of the present disclosure, the glass product further includes a supporting film; wherein the supporting film is located between the brightness enhancing film and the ink layer, or between the glass substrate and the brightness enhancing film.

[0020] In the embodiment of the present disclosure, the bending strength of the glass product measured by a four-point bending test method is reduced by less than 20% compared to the bending strength of the glass substrate.

[0021] In the embodiment of the present disclosure, the bending strength of the glass product measured by a four-point bending test method is reduced by less than 15% compared to the bending strength of the glass substrate.

[0022] In the embodiment of the present disclosure, the bending strength of the glass product is above 510 MPa.

[0023] In an embodiment of the present disclosure, a simulated prototype consisting of the glass product and a 200g counterweight is placed in a vibration wear tester filled with abrasives, and more than half of the body of the simulated prototype is kept immersed in the abrasives. The wear test is carried out at a vibration frequency of 5050±0.5HZ for more than 120min, and there is no obvious wear and scratches on the surface of the glass product.

[0024] In the embodiment of the present disclosure, the thickness of the glass product is 0.05 mm-0.2 mm, and the bending radius of the glass product is ≤5 mm.

[0025] In an embodiment of the present disclosure, based on a four-point bending test method, when a bending load ≥ 300 N is applied to the glass article, the glass article does not break.

[0026] The glass substrate is coated with an ultra-hard coating on one side and a brightness-enhancing coating on the other. This combination of coatings mitigates the effect of stress from the ultra-hard coating on one side on the glass's strength, preventing a significant decrease in strength after coating. This improves impact resistance while maintaining excellent wear resistance. Furthermore, the inclusion of the highly reflective brightness-enhancing coating increases the brightness of the glass product, significantly reducing the thickness of the ultra-hard coating, lowering production costs, and broadening the color tunability of the glass product. This glass product is particularly suitable for use in the back covers of electronic devices.

[0027] A second aspect of the present disclosure provides an electronic device comprising a housing assembled outside the electronic device and a circuit board located within the housing, wherein the housing comprises the glass product described in the first aspect of the present disclosure. The housing comprising the glass product may be a back cover of the electronic device or a camera protection cover.

[0028] In the embodiment of the present disclosure, the housing includes a back cover assembled on the back side of the electronic device, and the back cover is made of the glass product.

[0029] In an embodiment of the present disclosure, the electronic device further includes a camera assembly located inside the housing, the housing includes a camera protection cover, the camera protection cover is covered on the camera assembly, and the camera protection cover is made of the glass product.

[0030] The housing of the electronic device comprises the above-mentioned glass product, which has good wear resistance, drop resistance and color-adjustable appearance. The electronic device includes but is not limited to mobile phones, tablet computers, laptop computers, smart watches, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a schematic structural diagram of a glass product commonly used in mobile phone back covers.

[0032] FIG2 is a schematic structural diagram of a glass product provided in one embodiment of the present disclosure.

[0033] FIG3 is a schematic structural diagram of a glass product provided by another embodiment of the present disclosure.

[0034] FIG4 is a schematic structural diagram of a glass product provided in yet another embodiment of the present disclosure.

[0035] FIG5 is a schematic structural diagram of a glass product provided in another embodiment of the present disclosure.

[0036] FIG6A is a schematic diagram of the three-dimensional structure of an electronic device provided in an embodiment of the present disclosure.

[0037] FIG6B is a schematic diagram of the rear structure of the electronic device in FIG6A .

[0038] FIG. 7 is a schematic diagram of testing glass strength based on a four-point bending test method.

[0039] FIG8A is a reflection curve of the glass product of Comparative Example 2. ...

[0040] FIG8B is a reflection curve of the glass product according to Example 1 of the present disclosure. DETAILED DESCRIPTION

[0041] The embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0042] Currently, the back covers of electronic devices such as mobile phones typically utilize glass products with a superhard coating on one side. The structure is shown in Figure 1 . The glass product 100 comprises a glass substrate 10 with a superhard coating 20 applied to one side (specifically, the outer side facing the exterior of the electronic device). Because the glass product 100 has a high-hardness coating layer on only one side, while the other side lacks a high-hardness coating layer to balance the strength, the strength of the glass product 100 is significantly reduced compared to the strength of the glass substrate 10, with the strength reduction percentage exceeding 30%, severely degrading the impact resistance of the glass product 100 (e.g., poor drop resistance). Furthermore, to achieve high brightness, the superhard coating 20 is typically thick, exceeding 1 μm, resulting in high production costs. Furthermore, excessively thick, high-gloss superhard coatings 20 narrow the color range of decorative colors, resulting in poor color tunability of the glass product 100. To address the aforementioned issues with existing glass products, the presently disclosed embodiments provide a glass product that combines excellent wear resistance with high strength, low thickness, and wide color tunability.

[0043] Referring to Figure 2, Figure 2 is a schematic structural diagram of a glass product provided in one embodiment of the present disclosure. The glass product 200 provided in this embodiment of the present disclosure includes a glass substrate 10 having a first surface 101 and a second surface 102 disposed opposite each other. An ultrahard film 20 is disposed on the first surface 101, and a brightness enhancement film 50 is disposed on the second surface 102. The brightness enhancement film 50 has a reflectivity greater than or equal to 25%, while the ultrahard film 20 has a transmittance greater than or equal to 50%. Clearly, the brightness enhancement film 50 and the ultrahard film 20 function differently. In addition to its higher hardness, the ultrahard film 20 also has a higher transmittance, while the brightness enhancement film 50 has a higher reflectivity but poorer light transmittance.

[0044] When the glass article 200 is used as a housing for an electronic device, such as a back cover, the first surface 101 faces the exterior of the electronic device ("exterior" specifically refers to the portion directly accessible or visible to the user), while the second surface 102 faces the interior of the electronic device. Therefore, the first surface 101 can be referred to as the "exterior surface" and the second surface 102 as the "interior surface." Accordingly, the superhard film 20 faces the exterior of the electronic device, while the brightness enhancement film 50 faces the interior.

[0045] The present invention provides an ultra-hard film 20 on the outer surface of a glass substrate 10 and a brightness enhancement film 50 on the inner surface. On the one hand, by virtue of the coordination of the brightness enhancement film 50 and the brightness enhancement film 50 on both sides of the glass substrate, while ensuring that the wear resistance of the glass product 200 remains high, the effect of the stress of the ultra-hard film on one side on the glass strength can be reduced, thereby "balancing" the stress on both sides of the glass substrate, thereby making the glass product 200 relatively strong and ensuring its good impact resistance. On the other hand, the introduction of the brightness enhancement film 50 with high reflectivity can significantly increase the brightness of the glass product 200. Specifically, when light enters the glass product 200 from the outside, after passing through the ultra-hard film 20 with high transmittance and the glass substrate 10, and then being reflected by the brightness enhancement film 50 with high reflectivity, more light will pass through the glass substrate 10 and the ultra-hard film 20 to enter the human eye, resulting in a higher brightness of the glass product 200 as seen by the human eye. While the glass product 200 of the present embodiment achieves the same brightness as the conventional glass product 100, the thickness of the ultra-hard film 20 in the glass product 200 of the present embodiment is significantly lower than that of the conventional glass product 100. This reduces the production cost of the ultra-hard film 20 in the glass product 200 of the present embodiment, and the thinner ultra-hard film 20 is less prone to warping, thereby increasing film stability. Furthermore, the reduced thickness of the ultra-hard film 20 results in a smoother reflection curve and better color stability during film system design, making it easier to manipulate the color of the glass product 200 and expanding the color adjustment range of the glass product 200. Furthermore, the reduced thickness of the ultra-hard film 20 also facilitates a moderately lower overall thickness of the glass product 200 compared to the glass product 100, further facilitating the production of thinner and lighter electronic device casings.

[0046] Therefore, the glass product 200 provided in the embodiment of the present disclosure can combine many advantages such as high hardness (which can reflect good wear resistance), high strength, low thickness, and wide color adjustability. The glass product 200 is suitable for manufacturing electronic devices with good mechanical properties and high aesthetics.

[0047] In the present disclosure, the reflectivity of the brightness enhancing film 50 is controlled to be greater than or equal to 25% to ensure the brightening effect of the brightness enhancing film 50 on the color, and to avoid the brightness enhancing effect being weakened due to the low reflectivity of the brightness enhancing film 50. In addition, the transmittance of the superhard film 20 (specifically, the transmittance of visible light) is controlled to be greater than or equal to 50% to ensure that the loss of light passing through the superhard film 20 is not too low, and to avoid the brightness enhancement effect of light reflected from the brightness enhancing film 50 being reduced after passing through the superhard film 20. In some embodiments of the present disclosure, the reflectivity of the brightness enhancing film 50 is greater than 30%, and can further be greater than 40%, or greater than 50%, or greater than 60%, or greater than 70%, etc. The visible light transmittance of the superhard film 20 is greater than 55%, or greater than 60%, or greater than 70%, or greater than 80%, or greater than 90%, etc. In addition, the visible light transmittance of the brightness enhancing film 50 is less than 50%.

[0048] In the disclosed embodiment, the pencil hardness of the brightness enhancement film 50 is above 5H. This high hardness, when applied to the opposite side of the glass substrate from the superhard film 20, effectively offsets the effect of the stress of the single-sided superhard film on the glass strength. The term "pencil hardness" refers to scratch hardness measured using the pencil hardness test method.

[0049] In the present disclosure, under the same hardness comparison standard, the hardness of the superhard film 20 is greater than the hardness of the brightening film 50. In the embodiment of the present disclosure, the pencil hardness of the superhard film 20 can be 9H; the Mohs hardness of the superhard film 20 can reach 7 or more. The hardness of the superhard film 20 located on the outside of the glass substrate is relatively high, which is convenient for ensuring that the glass product 200 has excellent wear resistance. Among them, the term "Mohs hardness" is also called scratch hardness, which is a relative hardness. It uses 10 natural minerals as standards. The order of hardness does not indicate the decisive size of the hardness value of the object to be tested, but only indicates that minerals with a high hardness order can scratch minerals with a low hardness order. The hardness of other minerals is determined by comparing them with the standard minerals. In the present disclosure, the Mohs hardness is measured by scratching the surface of the object to be tested with a pyramidal diamond needle of known hardness using the scratching method.

[0050] In the disclosed embodiments, the flexural strength of the glass article 100, as measured by a four-point bending test, is reduced by less than 20% compared to the flexural strength of the glass substrate 10 without the brightness enhancement film 50 and the ultra-hard coating 20. For example, if the flexural strength of the glass article 100 is a MPa and the flexural strength of the glass substrate 10 alone is b MPa, and the aforementioned reduction percentage is k, then k = (b a) / b × 100%. In some embodiments, this reduction percentage is less than 15%, and can further be less than 12%, less than 11%, or less than 10%.

[0051] In the embodiment of the present disclosure, the bending strength of the glass product 100 measured based on the four-point bending test method can be greater than 490 MPa, and can further be greater than 510 MPa, or greater than 530 MPa, or greater than 535 MPa, or greater than 540 MPa, etc.

[0052] In the embodiment of the present disclosure, based on the four-point bending test method, when the bending load applied to the glass article is ≥300 N, the glass article does not break, which indicates that the glass article has high mechanical strength.

[0053] In some embodiments of the present disclosure, the thickness d1 of the brightness enhancement film 50 and the thickness d2 of the superhard film 20 satisfy the following relationship: 0.4d2≤d1<d2. d1 and d2 are measured in the same unit. Placing the brightness enhancement film 50 whose thickness satisfies this relationship on the other side of the glass substrate opposite to the superhard film 20 can better offset the effect of the stress of the single-sided superhard film on the strength of the glass. In this case, the percentage decrease in the bending strength of the glass product 100 compared to the bending strength of the glass substrate 10 measured by the four-point bending test method is less than 15%. The bending strength of the glass product 100 can be above 510 MPa, and further above 530 MPa. In some embodiments, d1 / d2 can be in the range of 0.5-0.95, for example, specifically 0.55, 0.60, 0.65, 0.68, 0.70, 0.72, 0.75, 0.80 or 0.90, etc.

[0054] In the embodiment of the present disclosure, to ensure that the ultra-hard film 20 has a high hardness and good wear resistance, the thickness d2 of the ultra-hard film 20 can be greater than or equal to 600nm. In some embodiments, the thickness d2 of the ultra-hard film 20 can be in the range of 600nm-950nm. The ultra-hard film 20 of appropriate thickness can increase the brightness of the glass product 200 and increase the color adjustable range in combination with the aforementioned brightness enhancement film 50 while ensuring the high hardness and stable film structure of the glass product 200. For example, d2 can be 620nm, 640nm, 660nm, 680nm, 700nm, 720nm, 750nm, 800nm, 820nm, 850nm, 900nm, 950nm, etc. In some embodiments, d2 can be in the range of 600-900nm, and further in the range of 600-860nm.

[0055] In some embodiments of the present disclosure, the thickness d1 of the brightness enhancement film 50 can be in the range of 240-600 nm. A brightness enhancement film 50 of appropriate thickness can ensure the brightness of the glass product 100 while better offsetting the stress generated by the super-hard coating on one side, thereby enhancing the strength of the glass product.

[0056] In the embodiment of the present disclosure, the brightness enhancement film 50 includes a laminated structure formed by alternating layers of a first high refractive index material layer and a first low refractive index material layer. In other words, the brightness enhancement film 50 includes at least one first high refractive index material layer (abbreviated as A layer) and at least one first low refractive index material layer (abbreviated as B layer), and the A layer and the B layer are alternately stacked. It can be understood that the refractive index of the A layer is greater than the refractive index of the B layer. In the direction from the glass substrate 10 to the brightness enhancement film 50, the laminated structure of the brightness enhancement film 50 can be (AB) n , or (BA) n , or (AB) n -A, or (BA)n -B arrangement (n is an integer greater than or equal to 1). The thickness of each A layer can be the same or different. The thickness of each B layer can be the same or different.

[0057] In the embodiment of the present disclosure, the refractive index of layer A may be greater than or equal to 2.0, and the refractive index of layer B may be less than or equal to 1.55. Layer A may include one of a niobium pentoxide layer (i.e., a Nb2O5 layer), a titanium dioxide layer (i.e., a TiO2 layer), a titanium pentoxide layer (i.e., a Ti3O5 layer), a niobium nitride layer (e.g., a NbN layer), or a titanium boride layer (e.g., a TiB layer). Layer B may include one of a silicon dioxide layer (i.e., a SiO2 layer), an aluminum oxide layer (i.e., an Al2O3 layer), or a magnesium fluoride layer (i.e., a MgF2 layer).

[0058] In some embodiments of the present disclosure, layer A is a niobium pentoxide layer, and layer B is a silicon dioxide layer. The high-refractive-index material in the brightness enhancement film 50 is Nb2O5, which has a relatively high refractive index, typically around 2.3. Its refractive index is not easily volatile, resulting in stable performance and a low absorption coefficient, ensuring that the brightness enhancement film 50 meets optical design requirements. The low-refractive-index material in the brightness enhancement film 50 is SiO2, which has a relatively low refractive index, approximately 1.45, and is relatively inexpensive to manufacture.

[0059] In some embodiments of the present disclosure, the brightness enhancing film 50 further includes an indium layer (i.e., an In layer). The presence of the indium layer can enhance the reflective effect of the brightness enhancing film 50. The indium layer is located between any adjacent first high refractive index material layer (A layer) and the first low refractive index material layer (B layer). For example, in some embodiments, the brightness enhancing film 50 includes two A layers and two B layers, and the A layers and the B layers are alternately stacked, and the A layer is in contact with the glass substrate 10. Then, from the glass substrate 10 toward the brightness enhancing film 50, the indium layer can be located between the first A layer and the first B layer, or between the first B layer and the second A layer, or between the second A layer and the second B layer. If the indium layer is recorded as the C layer, then, from the glass substrate 10 toward the brightness enhancing film 50, the brightness enhancing film 50 can specifically be arranged in the form of ACBAB, ABCAB, or ABACB.

[0060] In the embodiment of the present disclosure, the superhard film 20 includes a laminated structure formed by alternating a first superhard high refractive index material layer (abbreviated as D layer) and a second low refractive index material layer (abbreviated as E layer). It is understood that the refractive index of the D layer is greater than that of the E layer. In other words, the superhard film 20 includes at least one D layer and at least one E layer, and the D layer and the E layer are alternately stacked, and the refractive index of the D layer is greater than that of the E layer. Among them, the laminated structure of the superhard film 20 can be (DE) from the direction of the glass substrate 10 to the superhard film 20. n , or (ED)n , or (DE) n -D, or (ED) n -E arrangement (n is an integer greater than or equal to 1). The thickness of each D layer can be the same or different. The thickness of each E layer can be the same or different.

[0061] In the embodiment of the present disclosure, the refractive index of the D layer may be greater than or equal to 1.65, and the refractive index of the E layer may be less than or equal to 1.55. The E layer may include a silicon dioxide layer (i.e., SiO2 layer) or an aluminum oxide layer (i.e., Al2O3 layer). The D layer may include a silicon nitride layer (SiN x layer), zirconium dioxide layer (ie, ZrO2 layer), aluminum nitride layer (AlN x The silicon nitride layer, the aluminum nitride layer, and the zirconium dioxide layer may each comprise a silicon nitride oxide layer (SiON layer), a silicon oxynitride layer (SiON layer), or an aluminum oxynitride layer (AlON layer). The refractive index of the silicon nitride layer and the aluminum oxynitride layer may be greater than or equal to 1.65; the refractive index of the silicon nitride layer, the zirconium dioxide layer, and the aluminum nitride layer may be greater than or equal to 1.85.

[0062] In some embodiments of the present disclosure, the D layer is a silicon nitride layer, and the E layer is a silicon dioxide layer. The high-refractive-index superhard material in the superhard film 20 is silicon nitride (generally with a refractive index of approximately 1.95), which has high hardness, excellent wear resistance, and stable chemical properties, effectively increasing the hardness and wear resistance of the superhard film 20. The low-refractive-index material in the brightness enhancement film 50 is SiO2, which has a relatively low refractive index of approximately 1.45 and is relatively inexpensive to manufacture.

[0063] Among them, the above-mentioned A layer, B layer, D layer, and E layer can be independently plated by chemical vapor deposition or physical vapor deposition, wherein chemical vapor deposition includes but is not limited to hot wire chemical vapor deposition, or plasma enhanced chemical vapor deposition. Physical vapor deposition includes but is not limited to magnetron sputtering, vacuum evaporation, ion plating (such as arc ion plating, radio frequency ion plating), etc. In some embodiments of the present disclosure, the A layer, B layer, D layer, and E layer are all plated by magnetron sputtering. An exemplary plating process is as follows: the reaction gas and sputtering protection gas used to form the film layer can be filled into the vacuum deposition chamber and ionized. Under the action of a strong magnetic field, the ionization can bombard the surface of the sputtering target to deposit and form a corresponding film layer on the surface of the substrate to be plated. In addition, in the magnetron sputtering process, ICP (Inductively Coupled Plasma) can be used for auxiliary coating to improve the bonding strength of the film layer. Among them, adjusting parameters such as the pressure in the deposition chamber, the temperature of the substrate to be plated, the rate of magnetron sputtering, the target power, the flow rate of the reaction gas and sputtering gas, and the power of ICP can control the thickness and performance of the film layer.

[0064] In the disclosed embodiments, the thickness of the glass substrate 10 can be in the range of 0.4 mm to 1.0 mm, for example, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, etc. The glass substrate 10 serves as the substrate for the glass product 200 and supports the ultra-hard film 20, the brightness enhancement film 50, etc. The glass substrate 10 can be made of silicate glass, borate glass, phosphate glass, etc. Furthermore, these glass substrates can be chemically strengthened to enhance the protective properties of electronic device housings.

[0065] In some embodiments of the present disclosure, as shown in Figure 3, an anti-fingerprint layer (AF) 30 is also provided on the side of the ultra-hard film 20 facing away from the glass substrate 10. Specifically, the ultra-hard film 20 and the AF layer 30 are sequentially stacked on the first surface 101. The AF layer 30 is primarily used to reduce fingerprints formed on the glass article 200 when a user touches it, thereby minimizing the appearance of the glass article 200. The thickness of the AF layer 30 can range from 5 nm to 30 nm.

[0066] In some embodiments of the present disclosure, as shown in FIG3 , an ink layer 40 is further provided on the side of the brightness enhancement film 50 facing away from the glass substrate 10 . The ink layer 40 primarily serves a covering function, for example, to conceal a wiring structure subsequently installed on the inner side of the glass article 200 , thereby enhancing the visual effect of the glass article 200 . The ink layer 40 can be applied by screen printing or inkjet printing, and can be a complete film layer or an array of film layers. Furthermore, the color of the ink layer 40 can include, but is not limited to, red, orange, yellow, green, cyan, blue, purple, and black. Any color can be selected to meet different usage requirements. In some specific embodiments, the color of the ink layer 40 is black. The location, thickness, and color of the ink layer 40 can be adjusted based on the desired visual effect of the glass article 200 . For example, the thickness of the ink layer 40 can be in the range of 10 μm to 50 μm.

[0067] Referring to FIG4 , which is a schematic structural diagram of a glass product according to another embodiment of the present disclosure, the glass product shown in FIG4 differs from the glass product shown in FIG3 in that the glass product 200 in FIG4 further includes a support film 60 positioned between the brightness enhancement film 50 and the ink layer 40 .

[0068] Among them, the support film 60 can be specifically used to support the ink layer 40. For example, the ink layer 40 can be first formed on one side of the support film 60, and then the other side of the support film 60 is bonded to the glass substrate 10 with the super hard film 20 and the brightness enhancement film 50 on the opposite sides respectively. In the embodiment of the present disclosure, the material of the support film 60 may include polyethylene terephthalate (PET) or polyimide (PI). In addition, in order to facilitate the firm bonding between the support film 60 and the glass substrate 10 with the super hard film 20 and the brightness enhancement film 50 on the opposite sides respectively, the surface of the support film 60 may be provided with an adhesive layer, such as OCA (Optically Clear Adhesive) optical glue or pressure-sensitive adhesive. Among them, the thickness of the support film 60 can be in the range of 0.1mm-0.5mm.

[0069] In the glass product 200 shown in Figure 4 , the superhard coating 20 and the brightness-enhancing film 50 are disposed on opposite sides of the glass substrate 10, achieving similar effects as the glass product shown in Figure 2 . Specifically, by coating the glass substrate 10 with the superhard coating on the outside and the brightness-enhancing film on the inside, the brightness-enhancing film 50 can offset the stress caused by the superhard coating on one side of the glass substrate, ensuring that the strength of the glass product 200 does not significantly decrease compared to an uncoated glass substrate. Furthermore, the thickness of the superhard coating can be reduced, increasing the color tunability of the glass product 200. For details regarding the superhard coating 20, anti-fingerprint layer 30, brightness-enhancing film 50, and ink layer 40, please refer to the previous description of this disclosure.

[0070] Referring to Figure 5 , which is a schematic structural diagram of a glass product according to another embodiment of the present disclosure, Figure 5 differs from the glass product shown in Figure 3 in that the glass product 200 in Figure 5 further includes a support film 60 positioned between the glass substrate 10 and the brightness enhancement film 50 .

[0071] The support film 60 in Figure 5 can be used to support the brightness enhancement film 50 and the ink layer 40. For example, the brightness enhancement film 50 can be first plated on the first side of the support film 60, followed by printing to form the ink layer 40. The second side of the support film 60 (opposite to the first side) is then bonded to a glass substrate 10 having a superhard film 20 formed on one side, with the superhard film 20 and the support film 60 positioned on opposite sides of the glass substrate 10. Similarly, to facilitate secure bonding between the support film 60 and the glass substrate 10, the surface of the support film 60 can be provided with an adhesive layer, such as OCA adhesive or pressure-sensitive adhesive.

[0072] In the glass product 200 shown in FIG5 , the superhard film 20 and the brightness enhancement film 50 are disposed on opposite sides of the glass substrate 10, achieving similar effects as the glass product shown in FIG2 . For details regarding the superhard film 20, anti-fingerprint layer 30, brightness enhancement film 50, and ink layer 40, please refer to the description above in this disclosure.

[0073] In this disclosure, simulated prototypes consisting of the aforementioned glass products and a 200g counterweight were placed in a vibrating abrasion tester filled with abrasive particles, with more than half of the simulated prototype immersed in the particles. The abrasion test was conducted at a vibration frequency of 5050±0.5Hz for over 120 minutes. The surfaces of the glass products showed no noticeable wear or scratches. This demonstrates the glass products' excellent wear resistance and promising application prospects. In the preparation of the simulated prototypes using the glass products, the 200g counterweight was placed on one side of the brightness-enhancing film.

[0074] In some embodiments of the present disclosure, the thickness of each of the above-mentioned glass products 100 may be in the range of 0.05mm-0.2mm. In this case, the bending radius of the glass product may still be less than or equal to 5mm. This shows that the thinner glass product with the above-mentioned super-hard film 20 and the brightness enhancement film 50 can still have good bending properties and can be used to make ultra-thin flexible glass (UTG) for foldable electronic devices. Moreover, the film layers of the glass product are free of cracks, breakage, and falling off. Specifically, the thickness of the above-mentioned glass product 100 may be 0.06mm, 0.08mm, 0.1mm, 0.12mm, 0.15mm, or 0.2mm, etc. Furthermore, in this case, based on the four-point bending test method, when a bending load ≥300N is applied to such a glass product, it does not break.

[0075] The present disclosure also provides an electronic device, the housing of which may include the above-mentioned glass product of the present disclosure embodiment. Please refer to Figures 6A and 6B, Figure 6A is a schematic diagram of the three-dimensional structure of the electronic device 300 provided in an embodiment of the present disclosure, and Figure 6B is a schematic diagram of the rear structure of the electronic device in Figure 6A. The electronic device 300 can be a mobile phone, a tablet computer, a laptop computer, a wearable device (such as a smart watch, a smart bracelet, etc.), an augmented reality (AR) device, a virtual reality (VR) device, a vehicle-mounted device, etc., and the present disclosure does not limit this. This embodiment is described by taking the electronic device 300 as a mobile phone as an example.

[0076] The electronic device 300 may include a housing 31 assembled on the outside of the electronic device, and a circuit board 310 located inside the housing 31. The electronic device 300 may also include a display module 32, which is connected to the housing 31. Specifically, the display module 32 may be mounted on the housing 31. The housing 31 includes a back cover 311 assembled on the back side of the electronic device 300. The back cover 311 may cover only the back side of the electronic device 300 (i.e., the side facing away from the display module 32), or may cover both the back side and the side frame of the electronic device 300. In the embodiment of the present disclosure, the back cover 311 may be made of the above-mentioned glass product 200 of the embodiment of the present disclosure, and may be made entirely of the above-mentioned glass product 200, or may be made only partially of the above-mentioned glass product 200. When the back cover 311 is made of the above-mentioned glass product 200, the ink layer 40 of the glass product 200 faces the display module 32, and the anti-fingerprint layer 30 faces away from the display module 32. A processor is provided on the circuit board 310 , and the processor is used to control the display module 32 to display images.

[0077] In some embodiments of the present disclosure, as shown in Figure 6B, the electronic device 300 also includes a camera assembly 33 located inside the housing 31. The housing may include a camera protection cover 312. The camera protection cover 312 is covered on the camera assembly 33 to protect the camera assembly 33. The camera protection cover 312 can be made of the above-mentioned glass product 200 in the embodiment of the present disclosure. Specifically, it can be made entirely of the above-mentioned glass product 200 or only partially of the above-mentioned glass product 200.

[0078] The back cover 311 of the electronic device 300 and / or the camera protection cover 312 can adopt the above-mentioned glass product 200 of the embodiment of the present disclosure, which can have good wear resistance, mechanical strength and a gorgeous appearance with color tones, thereby making the market competitiveness of the electronic device outstanding.

[0079] The technical solution of the present disclosure is described in detail below with reference to specific embodiments.

[0080] Example 1

[0081] A glass product, as shown in FIG2 , includes a glass substrate 10 having a thickness of 0.55 mm. A superhard film 20 having a total thickness d2 of 640 nm is disposed on a first surface 101 of the glass substrate 10. The superhard film 20 comprises six layers of alternating silicon nitride and SiO2 layers, wherein the silicon nitride and SiO2 layers each have three layers, and the SiO2 layers are directly attached to the glass substrate 10. A brightness enhancement film 50 having a total thickness d1 of 440 nm is disposed on a second surface 102 of the glass substrate 10. The superhard film 20 comprises four layers of alternating Nb2O5 and SiO2 layers, wherein the Nb2O5 and SiO2 layers each have two layers, and the Nb2O5 layers are directly attached to the glass substrate 10.

[0082] In addition, in Example 1, the visible light transmittance of the superhard film 20 is 62%, and the reflectivity of the brightness enhancement film 50 is 35%. d1 / d2=0.68.

[0083] Example 2

[0084] The glass product of Example 1 differs in that the ratio of the total thickness d1 of the brightness enhancement film 50 to the thickness d2 of the superhard film 20 is 0.4. In the glass product of Example 2, the total thickness d2 of the superhard film is 850 nm, while the total thickness d1 of the brightness enhancement film 50 is 340 nm. The number of layers and film structure of the two films are the same as those of Example 1.

[0085] Example 3

[0086] The glass product differs from Example 1 in that the ratio of the total thickness d1 of the brightness enhancement film 50 to the thickness d2 of the superhard film 20 is 0.9. In the glass product of Example 3, the total thickness d2 of the superhard film is 600 nm, and its film structure is the same as that of Example 1. The total thickness d1 of the brightness enhancement film 50 is 540 nm, and it comprises nine layers of alternating Nb2O5 and SiO2 layers, with four Nb2O5 layers and five SiO2 layers, with the SiO2 layers directly attached to the glass substrate 10.

[0087] Example 4

[0088] The glass product of Example 1 differs in that the ratio of the total thickness d1 of the brightness enhancement film to the thickness d2 of the superhard film is 0.29, less than 0.4. In the glass product of Example 4, the total thickness d1 of the brightness enhancement film 50 is 187 nm. The film comprises seven layers of alternating Nb2O5 and SiO2 layers, including three Nb2O5 layers and four SiO2 layers, with the SiO2 layers directly attached to the glass substrate 10.

[0089] Example 5

[0090] The difference between this glass product and Example 1 is that the brightness enhancement film 50 comprises four layers of alternating TiO layers and SiO layers, with two TiO layers and two SiO layers respectively. The TiO layers are directly attached to the glass substrate 10. The total thickness d1 of the brightness enhancement film 50 is 271 nm, with d1 / d2 = 0.42.

[0091] In order to highlight the beneficial effects of the present disclosure, the following comparative examples are provided.

[0092] Comparative Example 1

[0093] A glass product, specifically the glass substrate used in Example 1, has no film layer disposed on its surface.

[0094] Comparative Example 2

[0095] A glass product, as shown in FIG1 , comprises a glass substrate 10 (same as in Example 1) with an ultrahard film 20 applied to one side of the glass substrate 10. The ultrahard film 20 has a total thickness of 1100 nm and is comprised of ten alternating layers of silicon nitride and SiO₂, with five layers each. The SiO₂ layers are directly attached to the glass substrate 10. The ultrahard film has a visible light transmittance of 53%.

[0096] To demonstrate the beneficial effects of the present disclosure, the following performance tests were performed on the glass products of the above embodiments and comparative examples:

[0097] a. Hardness test: The surface of the glass product to be tested was scratched using a pyramidal diamond needle using a scratching method (for each embodiment and comparative example 2, specifically scratching its superhard film), and the depth of the scratch was measured. The depth of the scratch is the Mohs hardness.

[0098] The results show that the Mohs hardness of the superhard coating in the glass products of each embodiment and Comparative Example 2 can reach 8, while the Mohs hardness of the simple glass substrate (Comparative Example 1) is only 5.

[0099] b. Wear resistance test:

[0100] The test equipment is a vibration wear tester R180 / 530TE 30 (equipment frequency: 50±0.5 Hz, amplitude: 1.65±0.1 mm). 15 liters of mixed abrasive are used: 3 parts by volume of RKF 10K (yellow cylindrical abrasive) and 1 part by volume of RKK 15P (green conical abrasive).

[0101] Test Sample Preparation: The glass products from each Example and Comparative Example were secured together with a 200g counterweight (for each Example and Comparative Example 2, the counterweight was placed on the side of the glass substrate facing away from the superhard coating) to form a simulated prototype. This prototype was then placed in a vibration abrasion tester for testing. A maximum of two simulated prototypes were placed in each vibration abrasion tester to prevent collisions.

[0102] The test process is as follows: (1) Pour 1L of water evenly into the vibration tank of the vibration wear-resistant instrument containing the above-mentioned abrasive to keep the abrasive wet, and then evenly pour 200mL of detergent (the detergent is a commercially available German (2) The test sample is numbered and placed in a vibration tank filled with mixed abrasives, with the simulated sample uniformly inserted into the abrasive with its head facing upwards, ensuring that at least half of the simulated sample is immersed in the abrasive particles; the vibration wear instrument is started, which serves as the timing zero. After 30 minutes, the test sample is taken out, cleaned, and the appearance of the sample is inspected, and photographed and recorded; (3) About 500 mL of water is evenly poured into the vibration tank to ensure that the abrasive remains moist. Step (2) is repeated, and the sample is taken out at 60 minutes, 90 minutes, 90 minutes, and 120 minutes for observation and photographic recording.

[0103] The results showed that after 120 minutes (i.e., 2 hours) of wear resistance testing, the large surfaces and corners of the glass products of each embodiment and comparative example 2 had no obvious wear and bruises, and the film layer did not fall off or leak. This shows that the ultra-hard film in the glass product has good wear resistance, while the surface of the glass product of comparative example 1 showed more serious scratches and damage.

[0104] c. Glass strength test:

[0105] The glass strength is tested based on the four-point bending test method, as shown in Figure 7. The test method includes the following steps:

[0106] ① Process each glass product into a 3D curved surface sample and inspect the appearance of each glass sample before testing to ensure that the product has no cracks, gaps or other defects that affect strength;

[0107] ② Check and clean the support (located below the lower support roller) and the upper pressure roller of the strength tester, and ensure that the upper and lower rollers are clean and there are no serious scratches on the surface;

[0108] ③ Fix the test sample with a four-point bending test fixture, positioning it between the upper pressure roller and the lower support roller, and in the middle of the two lower support rollers (as shown in Figure 7). The measurement direction of the test sample and the selection of upper and lower rollers are as follows: 3D curved products: Measure in the Y-axis direction (the length direction of the product). The diameter of the lower support roller and the upper pressure roller are both 6mm.

[0109] ④ Set the preload, generally set to 1-2N, to ensure that the test sample is in contact with the upper and lower rollers;

[0110] ⑤Set the pressing speed of the load: 10mm / min;

[0111] ⑥ Start the test instrument and begin applying the bending load. Continue applying the bending load at a downward speed of 10 mm / min until the test sample breaks. Record the maximum load value applied during the test, which is the maximum load F corresponding to the moment the sample breaks.

[0112] ⑦Calculate the bending strength according to the following formula:

[0113] σ=3F×(Ls-Lb) / (2B×H 2 )

[0114] Wherein, σ represents the bending strength of the test sample, in MPa;

[0115] F represents the maximum load corresponding to the rupture of the test sample, in N;

[0116] Ls represents the distance between the center lines of the two lower support rollers, in mm; in this disclosure, Ls is 40 mm;

[0117] Lb represents the distance between the center lines of the two upper pressing rollers, in mm; in this disclosure, Lb is 20 mm;

[0118] B represents the width of the test sample (parallel to the extension direction of each roller), in mm;

[0119] H represents the thickness of the test sample in mm.

[0120] ⑧ Five parallel samples were tested in each group, and the average value of the five measured bending strengths was taken. The test results are shown in Table 1 below.

[0121] Table 1

[0122] As can be seen from Table 1, the bending strength of the glass product of Comparative Example 2, in which an ultra-hard film is provided on one side of the glass substrate, is severely reduced, by about 30.1%, compared to the glass substrate (Comparative Example 1). However, after the embodiment of the present disclosure provides an ultra-hard film on one side of the glass substrate and a brightness enhancement film on the opposite side, the bending strength of the resulting glass product is still relatively high, and its bending strength is only reduced by less than 20% compared to the bending strength of the glass substrate. Among them, the bending strength of the glass products of Examples 1-5 is reduced by 8.48%, 11.17%, 5.81%, 19.09%, and 9.69% respectively compared to the bending strength of the glass substrate. From the comparison between Examples 1-4, it can be seen that when the ratio of the thickness d1 of the brightness enhancement film to the thickness d2 of the ultra-hard film in the glass product is less than 0.4 (such as the ratio is 0.29 in Example 4), the percentage reduction in the strength of the glass product compared to the glass substrate will be relatively high.

[0123] In addition, the glass products of Example 2 and Example 1 were also subjected to reflectivity tests. Specifically, white light was irradiated from the side of the super-hard film, and the angle between the incident angle of the white light and the normal direction of the super-hard film was controlled to be 10°. The measured reflection curves are shown in Figures 8A and 8B, respectively.

[0124] As can be seen from Figures 8A and 8B, the glass product of Comparative Example 2 with a single-sided super-hard film and the glass product of Example 1 with an external super-hard film and an internal brightening film can achieve substantially the same Lab chromaticity coordinate values ​​(in the Lab chromaticity coordinates of Comparative Example 2, the a value is 12.18, the b value is 28.37, and the L value is 69.47; in the Lab chromaticity coordinates of Example 1, the a value is 12.18, the b value is 28.40, and the L value is 69.47), and the reflection curve of the glass product of Example 1 is smoother, which reflects that its color stability is better. It should be noted that when the two achieve similar color effects, the thickness of the super-hard film itself in Comparative Example 2 is 1100nm, while the thickness of the super-hard film in Example 1 of the present disclosure is only 640nm, and the total thickness of the super-hard film and the brightening film is 1080nm. It can be seen that while the glass product in the comparative example with a single-sided super-hard film achieves the same brightness / color as the glass product in the embodiment of the present disclosure, the thickness of the super-hard film in the embodiment of the present disclosure is significantly lower, which is more conducive to color adjustment.

[0125] In addition, the glass products of Examples 2-5 also have substantially the same color effects as that of Example 1, and their reflection curves are similar.

[0126] According to the above results, the glass product provided by the embodiment of the present invention has a super-hard film on one side and a brightness-enhancing film on the other side of the opposite sides. The glass product can have good wear resistance without a significant reduction in strength and still has excellent mechanical properties. At the same time, the thickness of the super-hard film in the glass product is relatively low, which is convenient for adjusting the appearance color of the glass product.

[0127] The above is an exemplary embodiment of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made thereto without departing from the principles of the present disclosure. These improvements and modifications are also considered to be within the scope of protection of the present disclosure.

[0128] It should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" in this disclosure should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; they can refer to mechanical connection; they can refer to direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances.

[0129] The directional terms mentioned in the present disclosure, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only used to refer to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present disclosure, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present disclosure.

[0130] In addition, in the description of this disclosure, unless otherwise specified, "plurality" means two or more. Furthermore, numerical ranges expressed as "to" in this specification are ranges that include the values ​​before and after "to" as the minimum and maximum values, respectively. In the drawings, elements with similar or identical structures are denoted by the same reference numerals.

Claims

1. A glass article (200), characterized in that, The glass article (200) includes a glass substrate (10) having a first surface (101) and a second surface (102) disposed opposite to each other. Among them, a super hard film (20) is disposed on the first surface (101), and a brightness enhancement film (50) is disposed on the second surface (102); the reflectivity of the brightness enhancement film (50) is greater than or equal to 25%, and the light transmittance of the super hard film (20) is greater than or equal to 50%.

2. The glass article (200) according to claim 1, wherein, The thickness d1 of the brightness enhancement film (50) and the thickness d2 of the super hard film (20) satisfy the following relationship: 0.4d2 ≤ d1 < d2.

3. The glass article according to claim 1 or 2, wherein, The thickness of the super hard film (20) is greater than or equal to 600 nm.

4. The glass article (200) according to any one of claims 1 to 3, characterized in that, The pencil hardness of the brightness enhancement film (50) is above 5H.

5. The glass article (200) according to any one of claims 1 to 4, characterized in that, The pencil hardness of the super hard film (20) is 9H; the Mohs hardness of the super hard film (20) reaches above 7.

6. The glass article (200) according to any one of claims 1 to 5, characterized in that, The brightness enhancement film (50) includes a stacked structure formed by alternately stacking a first high refractive index material layer and a first low refractive index material layer; among them, the refractive index of the first high refractive index material layer is greater than or equal to 2.0, and the refractive index of the first low refractive index material layer is less than or equal to 1.

55.

7. The glass article (200) according to claim 6, characterized in that, The first high refractive index material layer includes one of a niobium pentoxide layer, a titanium dioxide layer, a titanium trioxide layer, a niobium nitride layer, or a titanium boride layer; the first low refractive index material layer includes one of a silicon dioxide layer, an aluminum oxide layer, or a magnesium fluoride layer.

8. The glass article (200) according to claim 7, characterized in that, The first high refractive index material layer is a niobium pentoxide layer, and the first low refractive index material layer is a silicon dioxide layer.

9. The glass article (200) according to claim 6 or 7, characterized in that, The brightness enhancement film (50) further includes an indium layer, and the indium layer is located between any adjacent first high refractive index material layer and the first low refractive index material layer.

10. The glass article (200) according to any one of claims 1 to 9, characterized in that, The super hard film (20) includes a stacked structure formed by alternately stacking a first super hard high refractive index material layer and a second low refractive index material layer; among them, the refractive index of the first super hard high refractive index material layer is greater than or equal to 1.65, and the refractive index of the second low refractive index material layer is less than or equal to 1.

55.

11. The glass article (200) according to claim 10, wherein, The first super hard high refractive index material layer includes one of a silicon nitride layer, a zirconium dioxide layer, an aluminum nitride layer, a silicon oxynitride layer, or an aluminum oxynitride layer; the second low refractive index material layer includes a silicon dioxide layer or an aluminum oxide layer.

12. The glass article (200) according to claim 11, wherein, The first super hard high refractive index material layer is a silicon nitride layer, and the second low refractive index material layer is a silicon dioxide layer.

13. The glass article (200) according to any one of claims 1-12, characterized in that, On the side of the super hard film (20) facing away from the glass substrate (10), an anti-fingerprint layer (30) is further provided; on the side of the brightness enhancement film (50) facing away from the glass substrate (10), an ink layer (40) is further provided.

14. The glass article (200) according to claim 13, wherein, The glass article (200) further includes a support film (60); among them, the support film (60) is located between the brightness enhancement film (50) and the ink layer (40), or between the glass substrate (10) and the brightness enhancement film (50).

15. The glass article (200) according to any one of claims 1 to 14, characterized in that, Based on the four-point bending test method, the percentage decrease in the bending strength of the glass article (200) compared to the bending strength of the glass substrate (10) is below 20%.

16. The glass article (200) according to any one of claims 2 to 14, characterized in that, Based on the four-point bending test method, the percentage decrease in the bending strength of the glass article (200) compared to the bending strength of the glass substrate (10) is below 15%.

17. The glass article (200) according to claim 16, characterized in that, The bending strength of the glass article (200) is above 510 MPa.

18. The glass article according to any one of claims 1 to 17, characterized in that, A simulation prototype composed of the glass article and a 200 g counterweight is placed in a vibration wear tester containing abrasive grains, and more than half of the body of the simulation prototype is kept immersed in the abrasive grains. Wear resistance testing is carried out for more than 120 min at a vibration frequency of 5050 ± 0.5 HZ, and there is no obvious wear or damage on the surface of the glass article.

19. The glass article according to any one of claims 1 to 18, characterized in that, The thickness of the glass article is 0.05 mm - 0.2 mm, and the bending radius of the glass article ≤ 5 mm.

20. The glass article according to claim 19, wherein Based on the four-point bending test method, when the bending load applied to the glass article ≥ 300 N, the glass article does not break.

21. An electronic device (300), characterized in that, It includes a housing (31) assembled outside the electronic device (300), and a circuit board (310) located inside the housing (31). The housing (31) includes the glass article (200) according to any one of claims 1 - 20.

22. The electronic device (300) according to claim 21, wherein, The housing (31) includes a rear cover (311) assembled at the rear side of the electronic device (300), and the rear cover (311) is made of the glass article (200).

23. The electronic device (300) according to claim 22, wherein The electronic device (300) further includes a camera assembly (33) located inside the housing (31). The housing (31) includes a camera protection cover plate (312), and the camera protection cover plate (312) is covered on the camera assembly (33). The camera protection cover plate (312) is made of the glass article (200).

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