CN111099838A

CN111099838A - Curved glass cover plate and preparation method and terminal thereof

Info

Publication number: CN111099838A
Application number: CN201911400227.4A
Authority: CN
Inventors: 刘冠男; 盛鲁英; 汪杰; 刘方成
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-05-05
Also published as: WO2021136079A1

Abstract

The application provides a curved surface glass apron, including the curved surface glass basement to and set up the inorganic rete on the curved surface glass basement, inorganic rete includes light-permeable colour rete and shading rete, and the material of light-permeable colour rete includes at least one in inorganic oxide and the metal simple substance, and light-permeable colour rete and shading rete are range upon range of to be set up in a side surface of curved surface glass basement or set up respectively in the relative both sides surface of curved surface glass basement. The inorganic film layer has uniform color and good decorative effect, and the preparation of the inorganic film layer is not limited by the bending angle and is green and environment-friendly. The application also provides a preparation method of the curved glass cover plate and a terminal comprising the curved glass cover plate.

Description

Curved glass cover plate and preparation method and terminal thereof

Technical Field

The application relates to the technical field of electronic products, in particular to a curved glass cover plate and a preparation method and a terminal thereof.

Background

Curved electronic products are popular among consumers due to their special structural design. To improve the aesthetic feeling, the industry usually prints ink on the curved cover plate of the curved electronic product for decoration. However, the problem of uneven inking on the curved surface is obvious, the color of the formed ink layer is uneven, the decorative effect is not good, and the product yield is influenced; and when the bending angle of the curved surface is larger, the ink is difficult to decorate, and when the bending angle of the curved surface is larger than 90 degrees, the decoration can not be basically realized. In addition, organic substances in the ink generate pungent odor in the curing process, which is not beneficial to environmental protection. Therefore, a curved cover plate decoration scheme which has a good decoration effect, is not limited by a bending angle and is environment-friendly is needed to be found.

Disclosure of Invention

In view of this, the application provides a curved surface glass apron decorates through setting up inorganic rete on the curved surface glass basement, and this inorganic rete color effect is even, not restricted by the angle of buckling, and green to solve current printing ink to decorate curved surface apron decorative effect not good, be restricted by the angle of buckling to a certain extent, and be unfavorable for the problem of environmental protection.

Specifically, the first aspect, this application provides a curved surface glass apron, including the curved surface glass basement, and set up inorganic rete on the curved surface glass basement, inorganic rete includes light-permeable colour rete and shading rete, the material of light-permeable colour rete includes at least one in inorganic oxide and the metal simple substance, light-permeable colour rete with shading film layer range upon range of set up in a side surface of curved surface glass basement or set up respectively in the relative both sides surface of curved surface glass basement.

In an embodiment of the present application, the inorganic oxide includes one or more of silicon dioxide, niobium pentoxide, titanium dioxide, zirconium dioxide, lanthanum trioxide, tantalum pentoxide, and magnesium oxide.

In an embodiment of the present application, the elemental metal includes one or more of aluminum, titanium, silver, and germanium.

In the embodiment of the application, the light-permeable color film layer comprises an inorganic oxide film layer and a metal elementary film layer which are sequentially stacked on the curved glass substrate. Wherein, inorganic oxide rete can reach the selective reflection to the light of different wavelengths through the design of piling up of rete thickness, consequently forms different color effects, and metal simple substance rete has special metallic luster and reflection effect, sets up the color expressive force that can strengthen light-permeable colour rete on inorganic oxide rete with it, promotes the outward appearance effect of curved surface glass apron.

In the embodiments of the present application, the light-permeable color film layer is a single-layer or multi-layer stacked structure.

In the embodiment of the present application, the visible light transmittance of the light-permeable color film layer is greater than 70%.

In an embodiment of the present invention, the material of the light-shielding film layer includes one or more of silicon, silicon carbide, titanium aluminum nitride, and hydrogen-containing diamond. Further, the optical density value of the shading film layer is 2-5.

In an embodiment of the present application, the light-shielding film layer is a single-layer or multi-layer stacked structure.

In an embodiment of the present application, the inorganic film layer has a heat distortion temperature greater than 500 ℃. In the application, the thermal deformation temperature of the inorganic film layer is high, which is beneficial to ensuring the structural integrity of the inorganic film layer and the binding force between the inorganic film layer and the glass substrate in the preparation process of the curved glass cover plate.

In an embodiment of the present application, the thickness of the inorganic film layer is 50nm to 2000 nm. The inorganic film layer with proper thickness can form stronger binding force with the curved glass substrate, can not fall off, and can ensure that the curved glass cover plate has better appearance effect.

In the embodiment of the application, the thickness ratio of the light-permeable color film layer to the light-shading film layer is 1 to (1-10). Furthermore, the thickness ratio of the light-permeable color film layer to the shading film layer is 1 to (1-9).

In the embodiment of the application, when the light-permeable color film layer and the light-shielding film layer are stacked and arranged on one side surface of the curved glass substrate, the light-permeable color film layer is located between the curved glass substrate and the light-shielding film layer, or the light-shielding film layer is located between the curved glass substrate and the light-permeable color film layer.

In the embodiment of the application, when the light-permeable color film layer is the outermost structure of the curved glass cover plate, the light-permeable color film layer is far away from one side surface of the curved glass substrate and is provided with the protective layer.

In the embodiment of the application, the thickness of the curved glass substrate is 0.1mm-10 mm.

In the embodiment of the application, the bending angle of the curved glass cover plate is 10-180 degrees. In the application, the inorganic film layer and the curved glass substrate have strong binding force, so that the curved glass cover plate with a larger bending angle can be manufactured, and the application range of the curved glass cover plate is expanded.

In the embodiment of the application, the optical density value of the curved glass cover plate is 2-5.

In the embodiment of the application, the curved glass substrate is a curved toughened glass substrate, so that the hardness and the impact resistance of the curved glass cover plate are further improved.

The curved surface glass apron that this application first aspect provided, decorate through setting up inorganic rete on curved surface glass basement, inorganic rete includes light-permeable colour rete and shading rete, wherein light-permeable colour rete colour is even, color effect is good, light-permeable colour rete and shading rete can well combine with curved surface glass basement, do not receive the angle of bending restriction, be favorable to the preparation of the curved surface glass apron of multiple angle of buckling, and inorganic rete has avoided organic substance's use, green.

In a second aspect, the present application provides a method of making a curved glass cover plate, comprising:

providing a plane glass substrate, and depositing a light-permeable color film layer and a light-shielding film layer on the plane glass substrate to obtain a plane glass cover plate, wherein the light-permeable color film layer and the light-shielding film layer are laminated on one side surface of the plane glass substrate or respectively deposited on the opposite two side surfaces of the plane glass substrate, and the light-permeable color film layer is made of at least one of inorganic oxide and metal elementary substances;

and carrying out hot bending on the plane glass cover plate to obtain a curved surface glass cover plate.

In an embodiment of the present application, the hot bending includes:

and fixing the flat glass cover plate in a hot bending forming die, and keeping the flat glass cover plate for 30-200 s at 500-900 ℃ and 0.05-0.8 MPa, wherein the hot bending forming die comprises a female die and a male die.

In the embodiment of the application, in the hot bending process, a pressure of 0.05MPa-0.8MPa is applied to the male die.

In the embodiment of the application, in the hot bending process, 0.01MPa-0.2MPa of pressure is applied to the male die, and 0.04MPa-0.6MPa of vacuum adsorption pressure is applied to the female die. The two sides of the plane glass cover plate are pressed, so that the two sides are pressed, the pressure applied to the two sides is smaller than that applied to a single side, the stress is more dispersed, and the protection of the integral structure of the glass and the inorganic film layer is facilitated. And the pressure is applied to the two sides, so that the glass cover plate can achieve the required bending effect at relatively low temperature, and the protection film layer structure is more favorable.

In an embodiment of the present application, the preparation method further comprises: and after the hot bending treatment, tempering the curved glass cover plate.

In the embodiment of the application, the toughening treatment comprises the step of placing the curved glass cover plate in molten salt liquid at 300-500 ℃ for treatment for 0.5-10 h. This application is decorated the glass substrate through selecting the inorganic rete of specific material, and controlling the membrane thickness simultaneously can realize the tempering after the hot-bending is handled in suitable scope, makes the glass top layer form the pressure stress layer, promotes glass intensity.

In the embodiment of the application, when the thickness difference of the film layers on the two sides of the curved glass substrate is less than 500nm, the toughening treatment time is controlled to be 0.5h-5 h; when the thickness difference of the film layers on the two sides of the curved glass substrate is 500nm-1000nm, controlling the toughening treatment time to be 2h-8 h; and when the thickness difference of the film layers on the two sides of the curved glass substrate is more than 1000nm, controlling the toughening treatment time to be 4-10 h.

The preparation method of curved surface glass apron that this application second aspect provided carries out the hot bending operation again behind deposit light-permeable colour rete and shading rete, and the rete deposit is not restricted by the angle of bending, and the rete homogeneity of making is good, and is strong with the cohesion of plane glass substrate, and the heat resistance is good, can not appear droing or the condition of fracture when hot bending, realizes decorative effect through only setting up inorganic rete simultaneously, has avoided organic substance's use, green.

In a third aspect, the present application further provides a terminal comprising the curved glass cover plate manufactured by the manufacturing method of the first aspect or the second aspect of the present application.

In the embodiment of the application, the curved glass cover plate can be used as any one or more of a front cover, a rear cover and a middle frame of the terminal, so that the terminal can obtain a curved effect and rich color appearance, and the appearance expressive force of the terminal is improved.

Drawings

Fig. 1 is a schematic structural view of a curved glass cover plate according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of a curved glass cover plate according to another embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a curved glass cover plate according to another embodiment of the present disclosure;

FIG. 4 is a flow chart illustrating a process for manufacturing a curved glass cover plate according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

The technical solution of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

Referring to fig. 1, which is a schematic structural view of a curved glass cover plate according to an embodiment of the present disclosure, a curved glass cover plate 100 includes a curved glass substrate 10 and an inorganic film layer 20 disposed on the curved glass substrate 10, the inorganic film layer 20 includes a light-permeable color film layer 21 and a light-shielding film layer 22, and the light-permeable color film layer 21 is made of at least one of an inorganic oxide and a metal simple substance. The curved glass cover plate can be applied to a terminal, and the curved glass substrate comprises an appearance surface and an inner side surface which are oppositely arranged, wherein the appearance surface refers to one side surface facing the outside of the terminal, and the inner side surface refers to one side surface facing the inside of the terminal.

In the present embodiment, the light permeable color film layer 21 and the light blocking film layer 22 may be stacked on one surface of the curved glass substrate 10, or may be disposed on two opposite surfaces of the curved glass substrate 10.

In one embodiment of the present application, as shown in fig. 1, the light-permeable color film layer 21 and the light-shielding film layer 22 are stacked and disposed on the same side surface of the curved glass substrate 10, specifically, the light-permeable color film layer 21 is disposed on the inner side surface of the curved glass substrate 10, and the light-shielding film layer 22 is disposed on the surface of the light-permeable color film layer 21. At this time, the color of the light-permeable color film layer 21 appearing through the glass substrate 10 can be seen from the outer surface side of the curved glass substrate 10, and the color of the light-permeable color film layer 21 is more prominent due to the shielding effect of the light-shielding film layer 22. In this embodiment, the inorganic film layer 20 is located on the inner side of the glass substrate 10, and can be protected from the external environment, external force, and the like.

In another embodiment of the present application, as shown in fig. 2, the light permeable color film layer 21 and the light shielding film layer 22 are disposed on the same side surface of the curved glass substrate 10, specifically, the light shielding film layer 22 is disposed on the outer surface of the curved glass substrate 10, and the light permeable color film layer 21 is disposed on the light shielding film layer 22.

In another embodiment of the present application, as shown in fig. 3, the light permeable color film layer 21 and the light blocking film layer 22 are respectively disposed on two opposite side surfaces of the curved glass substrate 10, specifically, the light permeable color film layer 21 is disposed on the outer surface of the glass substrate 10, and the light blocking film layer is disposed on the inner surface of the glass substrate 10. At this time, the color of the light-permeable color film 21 is seen from the side of the appearance surface, and the color of the light-permeable color film 21 is more prominent due to the shielding effect of the light-shielding film 22.

According to the curved glass cover plate 100, the inorganic film layer 20 is arranged on the curved glass substrate 10 for decoration, wherein the light-permeable color film layer 21 can be uniform in color and good in appearance effect, and the shading film layer 22 can play a role in shading the internal structure of the terminal, so that the appearance effect of the curved glass cover plate 100 is improved; the inorganic film layer 20 is not limited by the bending angle of the glass, and is well combined with the curved glass substrate 10, so that the curved glass cover plate 100 with various bending angles can be prepared; meanwhile, the decoration is carried out by only adopting the inorganic film layer 20, so that the use of organic substances is avoided, and the environment is protected.

In the embodiment of the present application, the material of the light-permeable color film layer 21 may include one or more of inorganic oxide and metal simple substance. Specifically, the material of the light-permeable color film 21 may be, but not limited to, one or more of silicon dioxide, niobium pentoxide, titanium dioxide, zirconium dioxide, lanthanum trioxide, tantalum pentoxide, magnesium oxide, aluminum, titanium, silver, and germanium. The material of the transparent color film layer 21 is selected from colored inorganic substances, so that the transparent color film layer 21 is colored, and has a decorative effect on the curved glass cover plate 100.

In the present embodiment, the light-permeable color film layer 21 may have a single-layer structure or a multi-layer stacked structure. When the light-permeable color film layer 21 is of a multi-layer stacked structure, the material and thickness of each layer in the light-permeable color film layer 21 may be the same or different, and the material and thickness are specifically selected according to actual needs, so that the light-permeable color film layer 21 of the multi-layer stacked structure can realize rich color changes, and the appearance expressive force of the curved glass cover plate 100 is improved; the selection of material when light-permeable colour rete 21 is individual layer structure to and the selection of every layer of material can be one when light-permeable colour rete 21 is multilayer stacked structure, makes light-permeable colour rete 21 present a colour, also can be the mixture of multiple material, makes light-permeable colour rete 21 present different colours in different positions department, realizes dazzling light, can also be different regions and adopt different materials, realizes colliding the look, improves curved surface glass apron 100's outward appearance expressive force.

In the embodiment of the present application, the visible light transmittance of the light-permeable color film layer 21 is greater than 70%, which is beneficial to the color superposition of the light-permeable color film layer 21 with the multi-layer stacked structure, and enriches the color of the light-permeable color film layer 21. Further, the visible light transmittance of the light-permeable color film layer 21 is greater than 75%. Further, the visible light transmittance of the light-permeable color film layer 21 is greater than 80%. Specifically, the visible light transmittance of the light-permeable color film layer 21 may be, but is not limited to, 78%, 82%, 85%, 90%, and the like.

In some embodiments of the present application, the light-permeable color film layer 21 includes an inorganic oxide film layer and a metal simple substance film layer sequentially stacked on the curved glass substrate 10. Wherein, inorganic oxide rete can reach the selective reflection to the light of different wavelengths through the design of piling up of rete thickness, consequently forms different color effects, and metal simple substance rete has special metallic luster and reflection effect, sets up the color expressive force that can strengthen light-permeable colour rete 21 on inorganic oxide rete with it, promotes curved surface glass apron 100's outward appearance effect.

In the embodiment of the present application, the material of the inorganic oxide film layer may be, but is not limited to, one or more of silicon dioxide, niobium pentoxide, titanium dioxide, zirconium dioxide, lanthanum trioxide, tantalum pentoxide, and magnesium oxide. Further, the material of the inorganic oxide film layer may be one or more of silicon dioxide, lanthanum oxide and magnesium oxide.

In the embodiment of the present application, the material of the elemental metal film layer includes one or more of aluminum, titanium, silver, and germanium. When the thickness of the metal simple substance film layer is too large, the metal simple substance film layer and the inorganic oxide film layer are superposed to present a single mirror surface appearance, so that the thickness of the metal simple substance film layer is controlled to be relatively small, the reflectivity is relatively reduced, and the rich appearance effect is favorably generated. When the thickness of the metal simple substance film layer is less than 50nm, the metal simple substance film layer which is not conductive can be obtained, and therefore electromagnetic shielding generated when the curved surface glass cover plate 100 is used for electronic equipment is reduced.

In the embodiment of the present application, the material of the light-shielding film 22 includes one or more of silicon, silicon carbide, titanium aluminum nitride, and hydrogen-containing diamond, and the films formed by these materials have a good light-shielding effect. Specifically, the optical density of the light-shielding film 22 can be controlled to be 2-5 by controlling the material and the film thickness, so that the light-shielding film 22 has an excellent shielding effect. The Optical Density (OD) value is a parameter for evaluating the light shielding ability of the coating, and represents the logarithm of the ratio of incident light to transmitted light or the logarithm of the reciprocal of the light transmittance, and the calculation formula is OD ═ lg (incident light/transmitted light) or OD ═ lg (1/light transmittance). In the embodiment of the present application, the light-shielding film layer 22 may have a single-layer structure or a multi-layer stacked structure.

In the present embodiment, the thickness of the inorganic film layer 20 may be 50nm to 2000 nm. The inorganic film layer 20 with a suitable thickness can form a strong bonding force with the curved glass substrate 10, and does not fall off, and the curved glass cover plate 100 can obtain a good appearance effect. Further, the thickness of the inorganic film layer 20 is 100nm to 1800 nm. Further, the thickness of the inorganic film layer 20 is 150nm to 1600 nm. Specifically, the thickness of the inorganic film layer 20 may be, but not limited to, 80nm, 200nm, 350nm, 500nm, 750nm, 1000nm, 1200nm, 1500nm, and the like.

In the present embodiment, the thickness ratio of the light transmissible color film layer 21 and the light blocking film layer 22 may be 1: (1-10). The light-permeable color film layer 21 presents colors through a single-layer or multi-layer stacked structure design, the thickness is relatively small, the small thickness is beneficial to preventing the problem that the single mirror surface appearance is generated due to the fact that the reflectivity of the film layer is too large due to the large thickness, and meanwhile, the cost control is facilitated; the light-shielding film layer 22 is relatively thick, which is beneficial to achieving good light-shielding effect. Furthermore, the thickness ratio of the light-permeable color film layer 21 to the shading film layer 22 is 1: 1-9. Furthermore, the thickness ratio of the light-permeable color film layer 21 to the shading film layer 22 is 1 to (1-8). Specifically, the thickness ratio of the light-permeable color film layer 21 and the light-shielding film layer 22 can be, but not limited to, 1: 1, 1: 2, 1: 3, 1: 4.5, 1: 5, 1: 6, 1: 7, etc. In one embodiment of the present application, the thickness of the light-permeable color film 21 is 5nm to 1000nm, and the thickness of the light-shielding film 22 is 25nm to 1800 nm.

In the present embodiment, the heat distortion temperature of the inorganic film layer 20 is greater than 500 ℃. The inorganic film layer 20 has a high thermal deformation temperature, which is beneficial to ensuring the structural integrity of the inorganic film layer 20 and the bonding force with the glass substrate in the preparation process of the curved glass cover plate 100. Meanwhile, the inorganic film layer 20 is subjected to hot bending after being prepared, the higher the thermal deformation temperature of the inorganic film layer 20 is, the smaller the deformation risk during hot bending is, the curved glass cover plate 100 with a larger bending angle can be prepared, and the integrity and the appearance effect of the inorganic film layer 20 before and after hot bending are not affected. Further, the heat distortion temperature of the inorganic film layer 20 may be higher by 5 ℃ or more, and further, may be higher by 10 ℃ or more than the temperature of the heat bending treatment.

In some embodiments of the present application, when the light-permeable color film layer 21 is the outermost structure of the curved glass cover plate 100, especially when the light-permeable color film layer 21 is disposed on the outer surface of the curved glass substrate 10, the surface of the light-permeable color film layer 21 away from the curved glass substrate 10 is provided with a protective layer. The protective layer can effectively protect the light-permeable color film layer 21, prevent the light-permeable color film layer from being oxidized, abraded, scratched and the like, and prolong the service life of the curved glass cover plate 100. Specifically, the protective layer may be, but is not limited to, a hardened layer, a finishing coat layer, an anti-fingerprint layer, and the like. When the light-permeable color film layer 21 is arranged on the outer surface of the curved glass substrate 10, the protective layer is a transparent protective layer.

In the present embodiment, the light-permeable color film layer 21 may partially cover the curved glass substrate 10 (i.e., cover a partial area of the curved glass substrate 10), or may completely cover the curved glass substrate 10. When the light-permeable color film layer 21 completely covers the curved glass substrate 10, the curved glass cover plate 100 can be entirely colored by the light-permeable color film layer 21. When the light-permeable color film layer 21 partially covers the curved glass substrate 10, the light-permeable color film layer 21 may be a patterned structure, so that the curved glass cover plate 100 can simultaneously exhibit the appearance effects of colors and patterns.

In the present embodiment, the light-shielding film layer 22 may also partially cover the curved glass substrate 10, or completely cover the curved glass substrate 10. The coverage area of the light-blocking film layer 22 can be selected according to the coverage area of the light-permeable color film layer 21, so as to generate different appearance effects. In one embodiment, the coverage area of the light-shielding film layer 22 on the curved glass substrate 10 completely coincides with the coverage area of the light-permeable color film layer 21, and completely covers the curved glass substrate 10. In another embodiment, the coverage area of the light-shielding film layer 22 on the curved glass substrate 10 completely coincides with the coverage area of the light-permeable color film layer 21, and both the coverage areas cover a partial area of the curved glass substrate 10, so that the curved glass cover plate 100 has a color pattern area and also has a transparent area, and the appearance effect is rich. In another embodiment, the coverage area of the light-permeable color film layer 21 on the curved glass substrate 10 is not overlapped with the coverage area of the light-shielding film layer 22 on the curved glass substrate 10, so that the curved glass cover plate 100 has a color impact effect and the light-permeable performance of different areas has a difference. In other embodiments, the coverage area of the light-permeable color film layer 21 on the curved glass substrate 10 may partially overlap with the coverage area of the light-shielding film layer 22 on the curved glass substrate 10, and may not partially overlap with the coverage area.

In the embodiment of the present application, the bonding force between the inorganic film layer 20 and the curved glass substrate 10 is strong, and the inorganic film layer 20 is prepared first and then hot-bent, so that the preparation of the inorganic film layer 20 and the bending angle of the curved glass cover plate 100 do not affect each other, and therefore, the curved glass cover plate 100 with any bending angle, especially a large bending angle, can be manufactured. Specifically, the bending angle of the curved glass cover plate 100 may be 10 ° to 180 °. More specifically, for example, 10 °, 25 °, 30 °, 50 °, 80 °, 100 °, 130 °, 150 °, 180 °. In the present application, the curved glass cover plate 100 includes an inner concave surface and an outer convex surface, which are oppositely disposed, wherein the inner concave surface may be used as the outer surface of the curved glass cover plate 100, and the outer convex surface may also be used as the outer surface of the curved glass cover plate 100. The outer convex surface is used as the appearance surface of the curved glass cover plate 100, so that the curved glass cover plate can be better matched with other electronic equipment to form an accommodating space.

In the present embodiment, the curved glass substrate 10 has a thickness of 0.1mm to 10 mm. Further, the thickness of the curved glass substrate 10 is 0.5mm to 8 mm. Specifically, the thickness of the curved glass substrate 10 may be, but is not limited to, 0.3mm, 1mm, 2mm, 4mm, 6.5mm, 8mm, 9.5 mm. In the embodiment of the present application, the visible light transmittance of the curved glass substrate 10 may be greater than 85%. To improve the hardness and impact resistance of the curved glass cover plate 100, the curved glass substrate 10 may be a curved tempered glass substrate. In the present embodiment, the optical density of the curved glass cover plate 100 is 2 to 5, so that the curved glass cover plate 100 has a function of shielding the internal structure of the terminal.

The curved glass cover plate 100 provided by the application has the advantages that the inorganic film layer 20 is adopted to endow the curved glass substrate 10 with decorative appearance, the color is uniform, the visual effect is good, the preparation of the inorganic film layer 20 is not limited by the bending angle of the curved glass cover plate 100, organic substances are not needed, and the application of the curved glass cover plate 100 is facilitated.

Accordingly, referring to fig. 4, the present application further provides a method for manufacturing the curved glass cover plate 100, including:

s101: providing a plane glass substrate, and depositing a light-permeable color film layer and a light-shielding film layer on the plane glass substrate to obtain a plane glass cover plate, wherein the light-permeable color film layer and the light-shielding film layer are laminated on one side surface of the plane glass substrate or are respectively deposited on the opposite two side surfaces of the plane glass substrate, and the material of the light-permeable color film layer comprises at least one of inorganic oxide and metal elementary substances.

S102: and carrying out hot bending on the plane glass cover plate to obtain the curved surface glass cover plate.

In S101, providing a planar glass substrate may include, but is not limited to, providing glass, and cutting the glass to a desired size; edging by precision engraving such as computer digital control precision machining; then, the surface of the glass is smoother by carrying out the sweeping treatment; and finally, cleaning to obtain the flat glass substrate. Specifically, the cleaning operation may be, but not limited to, ion source cleaning for 1min to 10min at a vacuum value of 0.05Pa or less. Wherein, the thickness of the plane glass substrate can be selected according to actual needs. In one embodiment, the planar glass substrate has a thickness of 0.1mm to 10 mm. Specifically, the thickness of the flat glass substrate may be, but is not limited to, 0.3mm, 1mm, 2mm, 4mm, 6.5mm, 8mm, 9.5 mm. In one embodiment, the flat glass substrate has a visible light transmittance of greater than 85% to improve the application range of the curved glass cover plate.

In S101, the light-permeable color film layer and the shading film layer prepared by deposition have strong bonding force with the plane glass substrate and good heat resistance. In one embodiment, the light-permeable color film layer and the light-shielding film layer are deposited by physical vapor deposition. Specifically, the physical vapor deposition can be, but is not limited to, evaporation, sputtering, ion plating, and the like. In one embodiment, a mask plate may be disposed on a planar glass substrate during a deposition process to form a light-permeable color film layer and a light-shielding film layer having a target pattern. The shape of the mask plate can be selected according to actual needs.

In S101, the light-permeable color film layer and the light-shielding film layer are deposited on the planar glass substrate, specifically, the light-permeable color film layer is deposited on the planar glass substrate, and then the light-shielding film layer is deposited on the light-permeable color film layer, or the light-shielding film layer is deposited on the planar glass substrate, and then the light-permeable color film layer is deposited on the light-shielding film layer, or the light-permeable color film layer and the light-shielding film layer are deposited on the opposite two sides of the planar glass substrate, respectively. When the light-permeable color film layer is used as the outermost layer of the plane glass cover plate, the protective layer can be deposited on the surface of the light-permeable color film layer, the light-permeable color film layer and the curved surface glass cover plate are protected, oxidation, abrasion, scraping and the like are avoided, and the service life is prolonged. Specifically, the protective layer may be, but is not limited to, a hardened layer, a finishing coat layer, an anti-fingerprint layer, and the like.

In the present application, the heat distortion temperature of the light permeable color film layer and the light-shielding film layer is not lower than the heat distortion temperature. Specifically, the heat distortion temperature of the light-permeable color film layer and the light-shielding film layer may be higher by 5 ℃ or more than the temperature of the heat bending treatment, and further, may be higher by 10 ℃ or more. In one embodiment, the heat distortion temperature of the light-permeable color film layer and the light-shielding film layer is greater than 500 ℃, so that the light-permeable color film layer and the light-shielding film layer are not deformed basically during the hot bending process of the flat glass cover plate, the flat glass cover plate is kept well combined with the flat glass substrate, and the flat glass cover plate is prevented from falling off or cracking. In the embodiment of the present application, the material of the light-permeable color film layer may be selected from one or more of silicon dioxide, niobium pentoxide, titanium dioxide, zirconium dioxide, lanthanum trioxide, tantalum pentoxide, magnesium oxide, aluminum, titanium, silver and germanium. Furthermore, the material of the light-permeable color film layer comprises one or more of silicon dioxide, lanthanum oxide, magnesium oxide, aluminum, titanium, silver and germanium. In the embodiment of the present application, the material of the light-shielding film layer includes one or more of silicon, silicon carbide, titanium aluminum nitride, and hydrogen-containing diamond.

In S102, hot bending includes fixing the flat glass cover plate in a hot bending mold, and maintaining at 500-900 deg.C and 0.05-0.8 MPa for 30-200S. The specific setting can be carried out according to the thickness of the glass, the bending angle, the specific hot bending process and the like. In the embodiment of the application, the temperature of the hot bending can be 550-860 ℃, also can be 550-800 ℃, also can be 580-750 ℃, the pressure of the hot bending can be 0.05-0.75 MPa, also can be 0.1-0.7 MPa, also can be 0.2-0.6 MPa, the time of the hot bending can be 30-180 s, also can be 50-160 s, also can be 65-150 s, so as to obtain the curved glass cover plate with different bending angles.

In the embodiment of the application, the hot bending forming die comprises a male die and a female die which are matched, and the inner concave surface and the outer convex surface of the formed curved glass cover plate are respectively consistent with the bending degree of the male die and the bending degree of the female die. In one embodiment of the present application, during the hot bending process, a pressure of 0.05MPa to 0.8MPa is applied to the male mold, and the male mold is maintained at 500 ℃ to 900 ℃ for 30s to 200 s. In another embodiment of the present application, during the hot bending process, a pressure of 0.01MPa to 0.2MPa is applied to the male mold, while a vacuum adsorption pressure of 0.04MPa to 0.6MPa is applied to the female mold, and the male mold is maintained at 500 ℃ to 900 ℃ for 30s to 200 s. The two sides of the plane glass cover plate are pressed, so that the two sides are pressed, the pressure applied to the two sides is smaller than that applied to a single side, the stress is more dispersed, and the protection of the integral structure of the glass and the inorganic film layer is facilitated. And the pressing on the two sides can ensure that the glass cover plate can achieve the required bending effect at relatively low temperature, such as 500-800 ℃, 500-750 ℃, 500-680 ℃ and the like, and is more beneficial to protecting the film layer structure, thereby ensuring the preparation yield of the curved glass cover plate.

In an embodiment of the present application, the method for manufacturing a curved glass cover plate may further include: after the hot bending treatment, the curved glass cover plate is subjected to toughening treatment, wherein the toughening treatment specifically comprises the step of placing the curved glass cover plate in molten salt liquid at the temperature of 300-500 ℃ for treatment for 0.5-10 h. Wherein the molten salt may include at least one of sodium nitrate and potassium nitrate. The thickness of light-permeable colour rete and shading rete is frivolous in this application, and the curved surface glass substrate can carry out normal ion exchange in the fused salt, makes the glass top layer form the compressive stress layer, promotes curved surface glass apron intensity, and wherein the stress value on compressive stress layer can be 500Mpa-800 Mpa. Due to the existence of the inorganic film layer, the thickness of the film layers on the two sides of the curved glass substrate can be different, and further the ion exchange rate is influenced. In order to ensure the stress of the glass substrate and the smoothness of the surface, when the thickness difference of film layers on two sides of the curved glass substrate is less than 500nm, the tempering time is controlled to be 0.5h-5 h; when the thickness difference of the film layers on the two sides of the curved glass substrate is 500nm-1000nm, controlling the toughening time to be 2h-8 h; when the thickness difference of the film layers on the two sides of the curved glass substrate is larger than 1000nm, the toughening time is controlled to be 4-10 h. When the light-permeable color film layer and the shading film layer are arranged on one side surface of the curved glass substrate, the thickness difference of the film layers on the two sides of the curved glass substrate is the thickness of the inorganic film layer. When the light-permeable color film layer and the shading film layer are arranged on the two opposite sides of the curved glass substrate, the thickness difference of the film layers on the two sides of the curved glass substrate is the thickness difference of the light-permeable color film layer and the shading film layer.

According to the preparation method of the curved glass cover plate, the film layer is deposited firstly and then the curved glass cover plate is bent, so that the complexity of a film coating process during film coating after hot bending is avoided, and the preparation process is simple and easy to operate; the transparent color film layer and the shading film layer are deposited on the plane glass substrate, so that the film layer is good in uniformity and good in appearance effect, the bonding force with the plane glass substrate is strong, the bending angle of glass is not limited in the hot bending process, the performance of the original film layer can be well maintained, and the decorative effect of the curved glass substrate is realized; meanwhile, the preparation process avoids the use of organic substances, and is green and environment-friendly.

The application also provides a terminal, adopts foretell curved surface glass apron 100 to increase curved surface effect and decorative, promote terminal outward appearance expressive force, promote user experience. The terminal can be but not limited to a mobile phone, a tablet computer, an intelligent wearable device and the like. Referring to fig. 5, the terminal includes a housing and a main board, a battery, etc. disposed inside the housing. Wherein the housing may include a front cover 200, a rear cover 400, and a middle frame 300 disposed between the front cover 200 and the rear cover 400, wherein one or more of the front cover 200, the middle frame 300, and the rear cover 400 employs a curved glass cover plate 100. In some embodiments, the front cover 200 may be the curved glass cover plate 100 provided herein, in which the curved glass cover plate 100 has a visible region not covered by the light-permeable color film layer and the light-shielding film layer, and the display panel is disposed corresponding to the visible region. In other embodiments, the back cover 300 or the middle frame 400 for the terminal may be the curved glass cover plate 100 provided in the present application.

The technical solution of the present application is further illustrated by the following specific examples.

Example 1

A preparation method of a curved glass cover plate comprises the following steps:

(1) a flat glass substrate is provided with a thickness of 0.7 mm. The flat glass substrate is placed in an evaporation machine, a cabin door of the evaporation machine is closed, the vacuum is pumped to 0.003Pa, the surface of the flat glass substrate is cleaned for 3min by an ion source, then a first silicon dioxide layer with the thickness of 20nm, a titanium pentoxide layer with the thickness of 100nm and a second silicon dioxide layer with the thickness of 30nm are sequentially deposited on the surface of the flat glass substrate to form a light-permeable color film layer, and then silicon carbide is deposited on the surface of the second silicon dioxide layer to form a light-shielding film layer with the thickness of 300nm, so that the flat glass cover plate is obtained.

(2) And (2) putting the flat glass cover plate into a hot bending forming die (comprising a male die and a female die), putting the hot bending forming die into a hot bending machine, heating to 720 ℃, simultaneously applying 0.3Mpa pressure to the male die, maintaining the pressure for 90s, softening the flat glass cover plate, and forming to obtain the curved glass cover plate, wherein the bending angle is 89 degrees.

(3) And putting the prepared curved glass cover plate into potassium nitrate molten salt at 400 ℃, and performing ion exchange for 4 hours to obtain a toughened curved glass cover plate, wherein the surface stress value of the toughened curved glass cover plate is 700 MPa.

The color of the curved glass cover plate obtained in the embodiment 1 is bright yellow, and meanwhile, the light-permeable color film layer and the light-shielding film layer in the curved glass cover plate are well combined with the curved glass substrate, so that the curved glass cover plate does not fall off or crack.

Example 2

(1) a flat glass substrate is provided with a thickness of 0.1 mm. The flat glass substrate is placed in an ion plating film plating machine, and a mask plate is installed, so that the middle area of the flat glass substrate is shielded, and the area with a certain width at the edge is exposed. Closing the door of the film plating machine, vacuumizing to 0.05Pa, cleaning the surface of the planar glass substrate for 5min by using an ion source, then sequentially depositing an aluminum layer with the thickness of 5nm, a niobium pentoxide layer with the thickness of 10nm and a tantalum pentoxide layer with the thickness of 5nm on the surface of the planar glass substrate to form a light-permeable color film layer, and then sequentially depositing a silicon layer with the thickness of 20nm and an aluminum nitride titanium layer with the thickness of 10nm on the surface of the tantalum pentoxide layer to form a shading film layer, thereby preparing the planar glass cover plate.

(2) And (2) putting the flat glass cover plate into a hot bending forming die (comprising a male die and a female die), putting the hot bending forming die into a hot bending machine, heating to 600 ℃, simultaneously applying pressure of 0.8Mpa to the male die, maintaining the pressure for 200s, softening the flat glass cover plate, and forming to obtain a curved glass cover plate, wherein the bending angle is 180 degrees.

(3) And putting the prepared curved glass cover plate into molten salt mixed with potassium nitrate and sodium nitrate at the temperature of 300 ℃ (the mass ratio is 9:1), and performing ion exchange for 0.5h to obtain a toughened curved glass cover plate, wherein the surface stress value of the toughened curved glass cover plate is 500 MPa.

The color of the curved glass cover plate obtained in example 2 is light blue, and the light-permeable color film layer and the light-shielding film layer in the curved glass cover plate are well combined with the curved glass substrate.

Example 3

(1) a flat glass substrate is provided with a thickness of 10 mm. The plane glass substrate is placed in a sputtering machine, a cabin door of the sputtering machine is closed, the vacuumizing value is reduced to 0.03Pa, the surface of the plane glass substrate is cleaned for 1min by an ion source, and then zirconium dioxide serving as a plating material is sequentially deposited on the surface of the plane glass substrate to form a light-permeable color film layer of 200 nm. And sequentially depositing a 1000nm silicon carbide layer, a 500nm silicon layer and a 300nm hydrogen-containing diamond-like carbon layer to form a shading film layer, thereby preparing the plane glass cover plate.

(2) And (2) putting the flat glass cover plate into a hot bending forming die (comprising a male die and a female die), putting the hot bending forming die into a hot bending machine, heating to 900 ℃, simultaneously applying pressure of 0.05Mpa to the male die, maintaining the pressure for 30s, softening the flat glass cover plate, and forming to obtain a curved glass cover plate, wherein the bending angle is 10 degrees.

(3) And putting the prepared curved glass cover plate into sodium nitrate molten salt at 500 ℃, and performing ion exchange for 10 hours to obtain a toughened curved glass cover plate, wherein the surface stress value of the toughened curved glass cover plate is 800 MPa.

The color of the curved glass cover plate obtained in example 3 is bright black, and the light-permeable color film layer and the light-shielding film layer in the curved glass cover plate are well combined with the curved glass substrate.

Comparative example 1

A flat glass substrate is provided with a thickness of 0.7 mm. Printing ink on the surface of a plane glass substrate in a silk screen mode, and baking for 30min at 150 ℃ to obtain an ink layer with the thickness of 25 mu m. And (2) putting the plane glass substrate with the ink layer into a hot bending forming die (comprising a male die and a female die), putting the hot bending forming die into a hot bending machine, heating to 720 ℃, simultaneously applying 0.1Mpa pressure to the male die, maintaining the pressure for 90s, softening the plane glass cover plate, and forming, wherein the bending angle is 89 degrees. After the glass is taken out, the ink layer is carbonized and falls off, and the subsequent process cannot be carried out.

Compared with the example 1, even if the hot bending is carried out under lower pressure, the plane glass substrate decorated by the ink layer still cannot form curved glass with decorative effect after the hot bending, and the application requirement cannot be met. The inorganic film layer in the curved glass cover plate prepared by the method is well combined with the curved glass substrate, and the phenomenon of falling or cracking does not occur, so that the application of the curved glass cover plate is facilitated.

The above description is the preferred embodiment of the present application, but should not be taken as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the principle of the present application, several improvements and modifications can be made, and these improvements and modifications are also considered to be within the scope of the present application.

Claims

1. The utility model provides a curved surface glass apron, its characterized in that includes the curved surface glass basement, and sets up inorganic rete on the curved surface glass basement, inorganic rete includes light-permeable colour rete and shading rete, the material of light-permeable colour rete includes at least one in inorganic oxide and the metal simple substance, light-permeable colour rete with the shading rete range upon range of set up in a side surface of curved surface glass basement or set up respectively in the relative both sides surface of curved surface glass basement.

2. The curved glass cover plate according to claim 1, wherein the inorganic oxide comprises one or more of silicon dioxide, niobium pentoxide, trititanium pentoxide, titanium dioxide, zirconium dioxide, lanthanum trioxide, tantalum pentoxide, and magnesium oxide.

3. The curved glass cover plate according to claim 1, wherein the elemental metal comprises one or more of aluminum, titanium, silver, and germanium.

4. The curved glass cover plate of any one of claims 1-3, wherein the light-transmissible color film layer comprises an inorganic oxide film layer and an elemental metal film layer sequentially stacked on the curved glass substrate.

5. The curved glass cover plate according to any one of claims 1 to 4, wherein the light-shielding film layer comprises one or more of silicon, silicon carbide, titanium aluminum nitride and hydrogen-containing diamond.

6. The curved glass cover plate according to any one of claims 1-5, wherein the inorganic film layer has a heat distortion temperature greater than 500 ℃.

7. The curved glass cover plate of any one of claims 1-6, wherein the inorganic film layer has a thickness of 50nm to 2000nm, and the light-transmissible color film layer and the light-blocking film layer have a thickness ratio of 1: 1 to 10.

8. The curved glass cover plate of any one of claims 1-7, wherein the light permeable color film layer is a single layer or a multi-layer stack structure and the light blocking film layer is a single layer or a multi-layer stack structure.

9. The curved glass cover plate of any one of claims 1-8, wherein the light permeable color film layer is disposed between the curved glass substrate and the light blocking film layer or the light blocking film layer is disposed between the curved glass substrate and the light permeable color film layer when the light permeable color film layer and the light blocking film layer are stacked on one side surface of the curved glass substrate.

10. The curved glass cover plate of any one of claims 1-9, wherein when the light-transmissible color film layer is the outermost structure of the curved glass cover plate, a surface of the light-transmissible color film layer on a side away from the curved glass substrate is provided with a protective layer.

11. The curved glass cover plate of any one of claims 1-10, wherein the curved glass substrate has a thickness of from 0.1mm to 10 mm.

12. The curved glass cover plate of any one of claims 1-11, wherein the curved glass cover plate is bent at an angle of from 10 ° to 180 °.

13. The curved glass cover plate of any one of claims 1-12, wherein the curved glass cover plate has an optical density value of from 2 to 5.

14. A method for preparing a curved glass cover plate is characterized by comprising the following steps:

15. The method of manufacturing of claim 14, wherein the hot bending comprises:

16. The production method according to claim 15, wherein a pressure of 0.05MPa to 0.8MPa is applied to the male die during the hot bending.

17. The manufacturing method according to claim 15, wherein a pressure of 0.01MPa to 0.2MPa is applied to the male mold while a vacuum adsorption pressure of 0.04MPa to 0.6MPa is applied to the female mold during the hot bending.

18. The method of any one of claims 14-17, further comprising: and after the hot bending treatment, tempering the curved glass cover plate.

19. The preparation method of claim 18, wherein the tempering treatment comprises placing the curved glass cover plate in a molten salt liquid at 300-500 ℃ for 0.5-10 h.

20. The preparation method of claim 19, wherein when the thickness difference of the film layers on the two sides of the curved glass substrate is less than 500nm, the tempering treatment time is controlled to be 0.5h-5 h; when the thickness difference of the film layers on the two sides of the curved glass substrate is 500nm-1000nm, controlling the toughening treatment time to be 2h-8 h; and when the thickness difference of the film layers on the two sides of the curved glass substrate is more than 1000nm, controlling the toughening treatment time to be 4-10 h.

21. A terminal comprising a curved glass cover plate according to any one of claims 1 to 13 or produced according to the production method of any one of claims 14 to 20.