Asymmetric glass, mobile terminal and asymmetric glass manufacturing method

Abstract

The present application provides a kind of unequal thickness glass, mobile terminal and unequal thickness glass manufacturing method.The unequal thickness glass of the embodiment of the present application includes: first region and second region, the thickness of at least part of the second region is greater than the thickness of the first region, at least one of the junction of the first region and the second region, the position of the first region adjacent to the second region and the position of the second region adjacent to the first region is provided with expansion hole, the expansion hole extends from one end face to the other end face in the thickness direction of the unequal thickness glass.Therefore, the unequal thickness glass according to the present application has the advantages of less wrinkles after strengthening, high quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glass, in particular to a non-uniform thickness glass, a mobile terminal and a non-uniform thickness glass manufacturing method. BACKGROUND

[0002] In related art, after the non-uniform thickness glass is strengthened, different regions of the non-uniform thickness glass expand inconsistently, thereby wrinkles are generated on the surface of the product, and the quality of the product is reduced. SUMMARY

[0003] The present application aims to at least partially solve one of the technical problems in related art. To this end, embodiments of the present application propose a non-uniform thickness glass, a mobile terminal and a non-uniform thickness glass manufacturing method.

[0004] The non-uniform thickness glass of the embodiments of the present application comprises: a first region and a second region, at least part of the second region has a thickness greater than that of the first region, at least one of an intersection of the first region and the second region, a position adjacent to the second region of the first region and a position adjacent to the first region of the second region is provided with an expansion hole, and the expansion hole extends from one end face to the other end face in the thickness direction of the non-uniform thickness glass.

[0005] Therefore, the non-uniform thickness glass according to the embodiments of the present application has the advantages of less wrinkles after strengthening and high quality.

[0006] In some embodiments, the number of expansion holes is multiple, and the multiple expansion holes are arranged at intervals along the extension direction of the intersection of the first region and the second region.

[0007] In some embodiments, in the extension direction of the intersection of the first region and the second region, the distance between two adjacent expansion holes is greater than or equal to 10um and less than or equal to 100um.

[0008] In some embodiments, in the extension direction of the intersection of the first region and the second region, the minimum distance between the expansion hole and the end of the intersection of the first region and the second region is greater than or equal to 5mm, and the maximum distance between the expansion hole and the end of the intersection of the first region and the second region is less than or equal to 15mm.

[0009] In some embodiments, the first region and the second region are arranged side by side in the width direction of the non-uniform thickness glass, and the thickness of the second region decreases in the direction adjacent to the first region in the width direction of the non-uniform thickness glass.

[0010] In some embodiments, the first region has a first face and a second face opposite to each other in the thickness direction of the glass with unequal thickness, the second region has a third face and a fourth face, the fourth face is an inclined face, the first face is coplanar with the third face, the second face intersects with the fourth face, and the expansion hole is arranged at the intersection of the second face and the fourth face.

[0011] The glass with unequal thickness also comprises a third region, the thickness of the third region is greater than or equal to the thickness of the second region, the first region is located between two second regions in the width direction of the glass with unequal thickness, and the two second regions are located between two third regions.

[0012] In some embodiments, the expansion hole penetrates the glass with unequal thickness in the thickness direction of the glass with unequal thickness.

[0013] Alternatively, the ratio of the size of the expansion hole in the thickness direction of the glass with unequal thickness to the thickness of the first region is (0.25-0.5):1.

[0014] In some embodiments, the expansion hole is a circular hole, the diameter of the expansion hole is greater than or equal to 2 um and less than or equal to 50 um.

[0015] Alternatively, the expansion hole is an oblong hole, the length direction of the oblong hole is consistent with the extension direction of the intersection of the first region and the second region.

[0016] The application further provides a mobile terminal comprising the glass with unequal thickness.

[0017] The application further provides a method for manufacturing a glass with unequal thickness, comprising the following steps:

[0018] S1, performing thinning treatment on a first region 1 and a second region 2 of a glass substrate, so as to obtain a glass with unequal thickness, in which the thickness of at least part of the second region 2 is greater than the thickness of the first region 1;

[0019] S2, placing the glass with unequal thickness into a molten salt with a first preset temperature for strengthening;

[0020] S3, performing film plating on the end face of the glass with unequal thickness having a concave part in the thickness direction, so that both end faces of the glass with unequal thickness in the thickness direction are planar.

[0021] In some embodiments, in the step S1, an expansion hole 4 extending from one end face to the other end face in the thickness direction of the glass with unequal thickness is arranged at at least one of the following positions: the intersection of the first region 1 and the second region 2, the position adjacent to the second region 2 of the first region 1, and the position adjacent to the first region 1 of the second region 2.

[0022] In some embodiments, in the step S1, the expansion hole 4 is opened by laser, and the uneven thickness glass with the expansion hole 4 is put into an etching solution so that the etching solution can corrode the uneven thickness glass.

[0023] In some embodiments, in the step S1, the expansion hole is etched by an etching solution.

[0024] In some embodiments, after the step S1 is completed, the uneven thickness glass is pretreated in an environment with a second preset temperature and a preset air humidity.

[0025] In some embodiments, the second preset temperature is greater than or equal to 80℃ and less than or equal to 90℃, the preset air humidity is greater than or equal to 80% and less than or equal to 90%, and the pretreatment time is greater than or equal to 3 hours and less than or equal to 10 hours.

[0026] In some embodiments, the step S2 comprises:

[0027] S21, preheating the uneven thickness glass;

[0028] S22, putting the preheated uneven thickness glass into a molten salt with the first preset temperature for strengthening;

[0029] S23, annealing the strengthened uneven thickness glass.

[0030] In some embodiments, in the step S21, the preheating time of the uneven thickness glass is greater than or equal to 20 minutes and less than or equal to 60 minutes, and the preheating temperature is 320℃.

[0031] In the step S23, the annealing time of the uneven thickness glass is greater than or equal to 30 minutes and less than or equal to 60 minutes, and the annealing temperature is greater than or equal to 240℃ and less than or equal to 320℃.

[0032] In some embodiments, in the step S22, the first preset temperature is greater than or equal to 350℃ and less than or equal to 430℃, the uneven thickness glass is strengthened in the molten salt for a time greater than or equal to 5 minutes and less than or equal to 60 minutes, and the molten salt comprises potassium nitrate with a mass ratio of 50%-100% and sodium nitrate with a mass ratio of 0%-50%.

[0033] In some embodiments, the step S2 is implemented twice so as to strengthen the uneven thickness glass twice.

[0034] In some embodiments, when the step S22 is implemented for the first time, the first preset temperature is greater than or equal to 340℃ and less than or equal to 370℃, the time for strengthening the glass with uneven thickness in the molten salt is greater than or equal to 20 minutes and less than or equal to 50 minutes, and the molten salt comprises potassium nitrate with a mass ratio of 10%-65% and sodium nitrate with a mass ratio of 35%-90%;

[0035] When the step S22 is implemented for the second time, the first preset temperature is greater than or equal to 340℃ and less than or equal to 370℃, the time for strengthening the glass with uneven thickness in the molten salt is greater than or equal to 3 minutes and less than or equal to 20 minutes, and the molten salt comprises potassium nitrate with a mass ratio of 65%-95%, sodium nitrate with a mass ratio of 5%-35% and aluminum oxide with a mass ratio of 0.1%-2%. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a top view of the glass with uneven thickness according to an embodiment of the present application.

[0037] Figure 2 is a side view of the glass with uneven thickness according to an embodiment of the present application.

[0038] REFERENCE NUMERALS:

[0039] Glass with uneven thickness 100

[0040] First region 1, first face 11, second face 12;

[0041] Second region 2, third face 21, fourth face 22;

[0042] Third region 3;

[0043] Expansion hole 4. DETAILED DESCRIPTION

[0044] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0045] The glass with uneven thickness 100 according to an embodiment of the present application is described below with reference to the accompanying drawings. As shown in Figure 1 and Figure 2 The glass with uneven thickness 100 according to an embodiment of the present application comprises a first region 1 and a second region 2.

[0046] The thickness of at least part of the second region 2 is greater than the thickness of the first region 1, and at least one of the joint of the first region 1 and the second region 2, the position adjacent to the second region 2 of the first region 1, and the position adjacent to the first region 1 of the second region 2 is provided with an expansion hole 4. The expansion hole 4 extends from one end face to the other end face in the thickness direction of the non-uniform thickness glass 100.

[0047] The non-uniform thickness glass 100 according to the embodiment of the present application can make the joint of the first region 1 and the second region 2 or the position adjacent to the joint of the first region 1 and the second region 2 provided with an expansion space (expansion hole 4) by providing the expansion hole 4 at least one of the joint of the first region 1 and the second region 2, the position adjacent to the second region 2 of the first region 1, and the position adjacent to the first region 1 of the second region 2. Due to the different thicknesses, the first region 1 and the second region 2 which expand inconsistently are prone to be extruded and wrinkle at the joint and the position adjacent to the joint, and the provision of the expansion space (expansion hole 4) at the joint or the position adjacent to the joint can make at least part of the first region 1 and the second region 2 which expand inconsistently due to the different thicknesses be extruded and occupy a part of the expansion space (expansion hole 4) when the non-uniform thickness glass 100 is strengthened, that is, the expansion hole 4 provides the expansion space for at least part of the first region 1 and the second region 2, thereby preventing the joint of the first region 1 and the second region 2 from being extruded due to expansion, and further preventing the non-uniform thickness glass 100 from being wrinkled, so as to improve the product quality of the non-uniform thickness glass 100.

[0048] Therefore, the non-uniform thickness glass 100 according to the embodiment of the present application has the advantages of less wrinkles and high quality after strengthening.

[0049] As shown in Figure 1 and Figure 2 , the non-uniform thickness glass 100 according to the embodiment of the present application comprises a first region 1, a second region 2, and a third region 3.

[0050] The first region 1, the second region 2, and the third region 3 are arranged side by side in the width direction of the non-uniform thickness glass 100, the thickness of at least part of the second region 2 is greater than the thickness of the first region 1, and the thickness of the third region 3 is greater than or equal to the thickness of the second region 2. In the width direction of the non-uniform thickness glass 100, the first region 1 is located between two second regions 2, and the two second regions 2 are located between two third regions 3. Specifically, in the width direction of the non-uniform thickness glass 100, the third region 3, the second region 2, the first region 1, the second region 2, and the third region 3 are sequentially arranged. The width direction of the non-uniform thickness glass 100 can be the left-right direction, and the thickness direction of the non-uniform thickness glass 100 can be the up-down direction, the left-right direction being indicated by arrows in Figure 1 and Figure 2 , and the up-down direction being indicated by arrows in Figure 2The first region 1 is a plastic region, the second region 2 is a slope region, and the third region 3 is a display region.

[0051] As shown in FIG. 1, in some embodiments, the second region 2 has a thickness decreasing in a direction adjacent to the first region 1 in a width direction of the non-uniform thickness glass 100, and the thickness of either of the first region 1 and the third region 3 is unchanged. For example, in a size in a vertical direction, the second region 2 has a thickness decreasing in a left-right direction adjacent to the first region 1, and either of the first region 1 and the third region 3 is unchanged. Figure 2 As shown in FIG. 1, in some embodiments, the second region 2 has a thickness decreasing in a direction adjacent to the first region 1 in a width direction of the non-uniform thickness glass 100, and the thickness of either of the first region 1 and the third region 3 is unchanged. For example, in a size in a vertical direction, the second region 2 has a thickness decreasing in a left-right direction adjacent to the first region 1, and either of the first region 1 and the third region 3 is unchanged.

[0052] As shown in FIG. 1, in some embodiments, the second region 2 has a thickness decreasing in a direction adjacent to the first region 1 in a width direction of the non-uniform thickness glass 100, and the thickness of either of the first region 1 and the third region 3 is unchanged. For example, in a size in a vertical direction, the second region 2 has a thickness decreasing in a left-right direction adjacent to the first region 1, and either of the first region 1 and the third region 3 is unchanged. Figure 2 As shown in FIG. 1, in some embodiments, the second region 2 has a thickness decreasing in a direction adjacent to the first region 1 in a width direction of the non-uniform thickness glass 100, and the thickness of either of the first region 1 and the third region 3 is unchanged. For example, in a size in a vertical direction, the second region 2 has a thickness decreasing in a left-right direction adjacent to the first region 1, and either of the first region 1 and the third region 3 is unchanged. Figure 1 As shown in FIG. 1, in some embodiments, the second region 2 has a thickness decreasing in a direction adjacent to the first region 1 in a width direction of the non-uniform thickness glass 100, and the thickness of either of the first region 1 and the third region 3 is unchanged. For example, in a size in a vertical direction, the second region 2 has a thickness decreasing in a left-right direction adjacent to the first region 1, and either of the first region 1 and the third region 3 is unchanged.

[0053] As shown in FIG. 1, in some embodiments, the second region 2 has a thickness decreasing in a direction adjacent to the first region 1 in a width direction of the non-uniform thickness glass 100, and the thickness of either of the first region 1 and the third region 3 is unchanged. For example, in a size in a vertical direction, the second region 2 has a thickness decreasing in a left-right direction adjacent to the first region 1, and either of the first region 1 and the third region 3 is unchanged. Figure 1 As shown in FIG. 1, in some embodiments, the second region 2 has a thickness decreasing in a direction adjacent to the first region 1 in a width direction of the non-uniform thickness glass 100, and the thickness of either of the first region 1 and the third region 3 is unchanged. For example, in a size in a vertical direction, the second region 2 has a thickness decreasing in a left-right direction adjacent to the first region 1, and either of the first region 1 and the third region 3 is unchanged. Figure 2 As shown in FIG. 1, in some embodiments, the second region 2 has a thickness decreasing in a direction adjacent to the first region 1 in a width direction of the non-uniform thickness glass 100, and the thickness of either of the first region 1 and the third region 3 is unchanged. For example, in a size in a vertical direction, the second region 2 has a thickness decreasing in a left-right direction adjacent to the first region 1, and either of the first region 1 and the third region 3 is unchanged.

[0054] Any one of the following is provided: a. the intersection of the first region 1 and the second region 2 is provided with the expansion hole 4; b. the position adjacent to the first region 1 of the second region 2 is provided with the expansion hole 4; c. the position adjacent to the second region 2 of the first region 1 is provided with the expansion hole 4.

[0055] In some embodiments, the expansion hole 4 is provided at the intersection of the second face 12 and the fourth face 22, thereby facilitating the reduction of the wrinkles of the uneven thickness glass 100.

[0056] As shown in FIG. 1, the expansion hole 4 is provided at the position adjacent to the first region 1 of the second region 2, thereby facilitating the provision of the expansion hole 4 and reducing the difficulty of the opening. Figure 1 As shown in FIG. 1, the expansion hole 4 is provided at the position adjacent to the first region 1 of the second region 2, thereby facilitating the provision of the expansion hole 4 and reducing the difficulty of the opening.

[0057] Figure 2 As shown in FIG. 1, in some embodiments, the expansion hole 4 extends from one end face to another end face in the thickness direction of the uneven thickness glass 100. The extension direction of the expansion hole 4 can be consistent with the thickness direction of the uneven thickness glass 100, or can be provided obliquely to the thickness direction of the thickness direction of the uneven thickness glass 100. For example, the expansion hole 4 extends from the upper end face to the lower end face of the uneven thickness glass 100.

[0058] In some embodiments, the extension direction of the expansion hole 4 is consistent with the thickness direction of the uneven thickness glass 100. For example, the expansion hole 4 extends in the up-down direction.

[0059] As shown in FIG. 1, in some embodiments, the expansion hole 4 is provided at the intersection of the first region 1 and the second region 2, thereby facilitating the provision of the expansion hole 4 and reducing the difficulty of the opening. Figure 1 As shown in FIG. 1, in some embodiments, the expansion hole 4 is provided at the intersection of the first region 1 and the second region 2, thereby facilitating the provision of the expansion hole 4 and reducing the difficulty of the opening.

[0060] As shown in FIG. 1, in some embodiments, the expansion hole 4 is provided at the intersection of the first region 1 and the second region 2, thereby facilitating the provision of the expansion hole 4 and reducing the difficulty of the opening. Figure 1 As shown in FIG. 1, in some embodiments, the expansion hole 4 is provided at the intersection of the first region 1 and the second region 2, thereby facilitating the provision of the expansion hole 4 and reducing the difficulty of the opening.

[0061] ​In some embodiments, the minimum distance between the expansion hole 4 and the end of the intersection of the first region 1 and the second region 2 in the extending direction of the intersection of the first region 1 and the second region 2 is greater than or equal to 5 mm, and the maximum distance between the expansion hole 4 and the end of the intersection of the first region 1 and the second region 2 in the extending direction of the intersection of the first region 1 and the second region 2 is less than or equal to 15 mm. That is, the distance between the expansion hole group (the expansion holes 4 at both ends) formed by the plurality of expansion holes 4 arranged in the extending direction of the intersection of the first region 1 and the second region 2 and the (corresponding) end of the intersection of the first region 1 and the second region 2 is greater than or equal to 5 mm and less than or equal to 15 mm, so that the expansion hole 4 can provide an expansion space for the uneven thickness glass 100, and the influence of the expansion hole 4 on the strength of the uneven thickness glass 100 can be reduced, and the end of the intersection of the first region 1 and the second region 2 can be prevented from being broken. For example, the distance between the frontmost expansion hole 4 of each expansion hole group arranged in the front-back direction and the front end (the front edge of the second surface 12 and the fourth surface 22) of the intersection of the first region 1 and the second region 2 is 10 mm, and the distance between the rearmost expansion hole 4 of each expansion hole group arranged in the front-back direction and the rear end (the rear edge of the second surface 12 and the fourth surface 22) of the intersection of the first region 1 and the second region 2 is 10 mm.

[0062] In some embodiments, the expansion hole 4 penetrates the uneven thickness glass 100 in the thickness direction of the uneven thickness glass 100.

[0063] In some embodiments, the size of the expansion hole 4 in the thickness direction of the uneven thickness glass 100 is (0.25-0.5): 1 compared with the thickness of the first region 1. That is, the expansion hole 4 does not penetrate the uneven thickness glass 100, and the expansion hole 4 is formed on the end surface in the thickness direction of the uneven thickness glass 100. For example, the expansion hole 4 is formed on the upper surface (at least one of the second surface 12 and the fourth surface 22) of the uneven thickness glass 100, and the size of the expansion hole 4 in the up-down direction is 0.4: 1 compared with the thickness of the first region 1.

[0064] Optionally, the size of the expansion hole 4 in the thickness direction of the uneven thickness glass 100 is greater than or equal to 5 um and less than or equal to 20 um.

[0065] The expansion hole 4 can be a circular hole, a polygonal hole, and an irregular hole. For example, the expansion hole 4 is a circular hole, and the diameter of the expansion hole 4 is greater than or equal to 2 um and less than or equal to 50 um.

[0066] Optionally, the diameter of the expansion hole 4 is equal to 10 um.

[0067] In some embodiments, the expansion hole 4 is an oblong hole, and the length direction of the oblong hole is consistent with the extension direction of the joint of the first region 1 and the second region 2. Specifically, when the expansion hole 4 is an oblong hole, the number of the expansion hole 4 can be one. For example, the length direction of the oblong hole is the front-back direction, and the minimum distance between the joint end of the oblong hole and the first region 1 and the second region 2 is greater than or equal to 5 mm and less than or equal to 15 mm.

[0068] The present application also provides a mobile terminal comprising the unequal thickness glass 100 according to the embodiments of the present application. Therefore, the mobile terminal according to the embodiments of the present application has the advantages of less wrinkles and high quality of the unequal thickness glass 100.

[0069] The present application also provides a method for manufacturing the unequal thickness glass 100, comprising the following steps:

[0070] S1, performing a thinning treatment on the first region 1 and the second region 2 of the glass substrate, so as to obtain the unequal thickness glass 100 with the thickness of at least part of the second region 2 being greater than the thickness of the first region 1.

[0071] S2, placing the unequal thickness glass 100 into a molten salt with a first preset temperature for strengthening.

[0072] S3, coating the end surface of the unequal thickness glass 100 with the concave part in the thickness direction, so that both end surfaces of the unequal thickness glass 100 in the thickness direction are flat surfaces.

[0073] The method for manufacturing the unequal thickness glass 100 according to the embodiments of the present application coats the part with the concave part of the unequal thickness glass 100, so that both end surfaces of the unequal thickness glass 100 in the thickness direction are flat surfaces. In this way, the strengthened unequal thickness glass 100 is less likely to have wrinkles. Specifically, after the strengthening of the unequal thickness glass 100, the first region 1 and the second region 2 with different thicknesses are prone to be extruded and have wrinkles at the joint and the position adjacent to the joint due to the inconsistent expansion. The coating layer can fill the part with the concave part of the unequal thickness glass 100, so that the part with the thinner thickness of the unequal thickness glass 100 after coating has the support of the coating layer, and thus the expansion of the second region 2 can be blocked by the coating layer, thereby reducing the occurrence of wrinkles of the unequal thickness glass.

[0074] The unequal thickness glass 100 can be the unequal thickness glass 100 according to the embodiments of the present application. The method for manufacturing the unequal thickness glass 100 according to the embodiments of the present application will be specifically described below in combination with the unequal thickness glass 100 according to the embodiments of the present application.

[0075] In step S1, the first region 1 and the second region 2 of the glass substrate are subjected to a thinning treatment so as to obtain an uneven thickness glass 100 in which the thickness of at least part of the second region 2 is greater than the thickness of the first region 1. Specifically, the uneven thickness glass is obtained by subjecting the glass substrate to a large piece thinning, laser cutting, lamination, CNC, edge treatment, special-shaped thinning, and the like. For example, the first region 1 and the second region 2 of the uneven thickness glass 100 obtained by the thinning treatment form a concave portion in the uneven thickness glass 100.

[0076] In some embodiments, in step S1, an expansion hole 4 extending from one end face to the other end face in the thickness direction of the uneven thickness glass 100 is formed at at least one of the joint between the first region 1 and the second region 2, the position adjacent to the second region 2 of the first region 1, and the position adjacent to the first region 1 of the second region 2. The expansion hole 4 provides an expansion space for at least part of the first region 1 and the second region 2, thereby preventing the joint between the first region 1 and the second region 2 from being pressed against each other due to expansion, and further preventing the uneven thickness glass 100 from being wrinkled, so as to further improve the product quality of the uneven thickness glass 100.

[0077] In some embodiments, in step S1, the expansion hole 4 is formed by laser, and the uneven thickness glass 100 with the expansion hole 4 is placed in an etching solution so that the etching solution can corrode the uneven thickness glass 100. Specifically, the expansion hole 4 can be formed on the uneven thickness glass 100 by a laser drilling process. After laser drilling, the uneven thickness glass 100 is placed in the etching solution for overall thinning, and the expansion hole 4 is repaired by micro-cracks (the glass substrate forming the micro-cracks is corroded away) by acid corrosion. In this way, the hole wall, the hole bottom can be smoother, and the sharp corners of the hole opening can be rounded, thereby preventing the uneven thickness glass 100 from being damaged after strengthening. The time for placing the uneven thickness glass 100 with the expansion hole 4 in the etching solution is greater than or equal to 1 minute and less than or equal to 10 minutes. The etching solution includes at least one of hydrofluoric acid, sulfuric acid, and hydrochloric acid. In the etching solution, the concentration of hydrofluoric acid is less than or equal to 5%, the concentration of hydrochloric acid is less than or equal to 2%, and the concentration of sulfuric acid is less than or equal to 3%. For example, the time for placing the uneven thickness glass 100 with the expansion hole 4 in the etching solution is 5 minutes.

[0078] In some embodiments, in step S1, the expansion hole 4 is etched by using an etching solution. Specifically, acid-resistant ink is sprayed on the surface of the non-uniform thickness ultra-thin glass 100 after thinning, the thickness of the ink is about 10-20 um, the ink is cured in an oven at 150-230℃ for 10-20 minutes, and then the ink at the position of the expansion hole 4 is removed through processes such as exposure and development. After the surface without thinning is pasted with an acid-resistant film, the whole is placed in an etching solution so that the etching solution etches the expansion hole 4 at the position where the ink is removed. According to the opening depth, the etching time is reasonably adjusted. The longer the etching time, the deeper the opening depth. After the etching opening, the non-uniform thickness glass 100 is placed in a NAOH solution with a concentration of 25-50%, and after the film layer falls off, the product is cleaned in a cleaning machine.

[0079] In some embodiments, after step S1 is completed, the non-uniform thickness glass 100 is pretreated in an environment with a second preset temperature and a preset air humidity. Specifically, the second preset temperature is greater than or equal to 80℃ and less than or equal to 90℃, the preset air humidity is greater than or equal to 80% and less than or equal to 90%, and the pretreatment time is greater than or equal to 3 hours and less than or equal to 10 hours. In this way, the strength of the non-uniform thickness glass 100 can be increased. For example, the second preset temperature is 85℃, the preset air humidity is 84%, and the pretreatment time is 5 hours.

[0080] The step S2 includes a step S21, a step S22 and a step S23.

[0081] In step S21, the non-uniform thickness glass 100 is preheated. In step S21, the non-uniform thickness ultra-thin glass 100 is placed in a preheating furnace for preheating. The preheating time of the non-uniform thickness glass 100 is greater than or equal to 20 minutes and less than or equal to 60 minutes, and the preheating temperature is 320℃. In this way, the wrinkles during chemical strengthening of the glass can be reduced. For example, the preheating time of the non-uniform thickness glass 100 is 30 minutes.

[0082] In step S22, the preheated non-uniform thickness glass 100 is placed in a molten salt with a first preset temperature for strengthening. Specifically, the first preset temperature is greater than or equal to 350℃ and less than or equal to 430℃, and the non-uniform thickness glass 100 is strengthened in the molten salt for a time greater than or equal to 5 minutes and less than or equal to 60 minutes. The molten salt includes potassium nitrate with a mass fraction of 50-100% and sodium nitrate with a mass fraction of 0-50%. Compared with the non-uniform thickness glass without the expansion hole 4, the non-uniform thickness glass 100 with the expansion hole 4 is less prone to wrinkles after strengthening, so that the non-uniform thickness glass 100 with the expansion hole 4 can only be strengthened once for a long time, so that the strength of the non-uniform thickness glass 100 meets the requirements and the number of strengthening is reduced. For example, the first preset temperature is 350℃, and the non-uniform thickness glass 100 is strengthened in the molten salt for 60 minutes.

[0083] In step S23, the strengthened uneven thickness glass 100 is annealed. In step S23, the uneven thickness ultra-thin glass 100 is placed in an annealing furnace for annealing. The annealing time of the uneven thickness glass 100 is greater than or equal to 30 minutes and less than or equal to 60 minutes, and the annealing temperature is greater than or equal to 240°C and less than or equal to 320°C. Thus, the quality problem of the uneven thickness glass 100 caused by rapid cooling after strengthening can be prevented.

[0084] In some embodiments, step S2 is implemented twice to strengthen the uneven thickness glass 100 twice. Specifically, after steps S21, S22 and S23 are sequentially completed, the uneven thickness glass 100 after the first strengthening is cleaned to avoid contamination of the potassium nitrate molten salt in the second strengthening furnace, and then steps S21, S22 and S23 are sequentially implemented to strengthen the uneven thickness glass 100 twice. Strengthening twice can further increase the strength of the uneven thickness glass 100 and reduce the generation of wrinkles.

[0085] In some embodiments, when step S22 is implemented for the first time (first strengthening), the first preset temperature is greater than or equal to 340°C and less than or equal to 370°C, the uneven thickness glass 100 is strengthened in the molten salt for greater than or equal to 20 minutes and less than or equal to 50 minutes, and the molten salt includes 10%-65% potassium nitrate and 35%-90% sodium nitrate by mass. Thus, the uneven thickness glass 100 after the first strengthening has a preset strength.

[0086] When step S22 is implemented for the second time (second strengthening), the first preset temperature is greater than or equal to 340°C and less than or equal to 370°C, the uneven thickness glass 100 is strengthened in the molten salt for greater than or equal to 3 minutes and less than or equal to 20 minutes, and the molten salt includes 65%-95% potassium nitrate, 5%-35% sodium nitrate and 0.1%-2% aluminum oxide (Al2O3) by mass. Thus, the uneven thickness glass 100 after the second strengthening has a preset strength.

[0087] In step S3, the end face of the uneven thickness glass 100 having the concave portion in the thickness direction is coated so that both end faces of the uneven thickness glass 100 in the thickness direction are planar. Specifically, the concave portion (groove formed by the first region 1 and the second region 2) of the end face of the uneven thickness glass 100 can be coated; or the entire end face of the uneven thickness glass 100 having the concave portion can be coated. So that both end faces of the uneven thickness glass 100 in the thickness direction are planar, thereby reducing the wrinkling of the strengthened uneven thickness glass 100. For example, the flat face of the uneven thickness glass 100 is attached to a glass backing plate so as to be flat and untwisted, and a special resin film layer material is applied to the end face of the uneven thickness glass 100 having the concave portion by a spray coater to fill the groove. Then, the film layer is cured by heating in an oven at 180°C, and the cured film layer can fix the flat state of the uneven thickness glass 100, thereby obtaining the flat strengthened uneven thickness glass 100.

[0088] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0089] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0090] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected or can communicate with each other; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0091] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0092] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material or characteristic is included in at least one embodiment or example of the present application. Exemplary representations of the above terms in the specification are not necessarily directed to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples. In addition, different embodiments or examples described in the specification and features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0093] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary, and are not to be construed as limiting the present application, and any changes, modifications, replacements and variations of the above embodiments made by those skilled in the art are within the scope of the present application.

Claims

1. A type of glass with unequal thickness, characterized in that, include: A first region and a second region, wherein at least a portion of the thickness of the second region is greater than the thickness of the first region, and an expansion hole is provided at least one of the junction of the first region and the second region, the position of the first region adjacent to the second region, and the position of the second region adjacent to the first region, wherein the expansion hole extends from one end face toward the other end face in the thickness direction of the unequal thickness glass. The first region and the second region are arranged side by side in the width direction of the unequal thickness glass, and the thickness of the second region decreases in the width direction of the unequal thickness glass along the direction adjacent to the first region; In the thickness direction of the unequal thickness glass, the first region has a first surface and a second surface facing away from each other, the second region has a third surface and a fourth surface, the fourth surface is an inclined surface, the first surface and the third surface are coplanar, the second surface and the fourth surface intersect, and the expansion hole is opened at the intersection of the second surface and the fourth surface.

2. The unequal thickness glass according to claim 1, characterized in that, The number of expansion holes is multiple, and the multiple expansion holes are arranged at intervals along the extension direction of the junction of the first region and the second region.

3. The unequal thickness glass according to claim 2, characterized in that, In the extending direction at the junction of the first region and the second region, the distance between two adjacent expansion holes is greater than or equal to 10 μm and less than or equal to 100 μm.

4. The unequal thickness glass according to claim 3, characterized in that, In the extending direction at the junction of the first region and the second region, the minimum distance between the expansion hole and the end of the junction of the first region and the second region is greater than or equal to 5 mm, and the maximum distance between the expansion hole and the end of the junction of the first region and the second region is less than or equal to 15 mm.

5. The unequal thickness glass according to claim 1, characterized in that, It also includes a third region, the thickness of which is greater than or equal to the thickness of the second region. In the width direction of the unequal thickness glass, the first region is located between two second regions, and the two second regions are located between two third regions.

6. The unequal thickness glass according to claim 1, characterized in that, The expansion hole penetrates the unequal-thickness glass along the thickness direction of the unequal-thickness glass; Alternatively, the ratio of the size of the expansion hole in the thickness direction of the unequal-thickness glass to the thickness of the first region is (0.25-0.5):

1.

7. The unequal thickness glass according to any one of claims 1-6, characterized in that, The expansion hole is a circular hole with a diameter greater than or equal to 2 μm and less than or equal to 50 μm. Alternatively, the expansion hole may be an oblong hole, the length of which is aligned with the extension direction of the junction between the first region and the second region.

8. A mobile terminal, characterized in that, Including the unequal thickness glass as described in any one of claims 1-7.

9. A method for manufacturing glass of unequal thickness, used to manufacture glass of unequal thickness as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Thinning process is performed on the first region and the second region of the glass substrate to obtain unequal thickness glass in which at least a portion of the thickness of the second region is greater than the thickness of the first region. S2. The glass of unequal thickness is placed in molten salt at a first preset temperature for strengthening. S3. Coating is performed on the end face with the concave portion in the thickness direction of the unequal thickness glass so that both end faces in the thickness direction of the unequal thickness glass are flat.

10. The method for manufacturing unequal thickness glass according to claim 9, characterized in that, In step S1, an expansion hole is formed at at least one of the following locations: the junction of the first region and the second region, the position of the first region adjacent to the second region, and the position of the second region adjacent to the first region. The expansion hole extends from one end face toward the other end face in the thickness direction of the unequal thickness glass.

11. The method for manufacturing unequal thickness glass according to claim 10, characterized in that, In step S1, the expansion holes are created using a laser, and the glass with the expansion holes is placed in the etching solution so that the etching solution can corrode the glass with the uneven thickness.

12. The method for manufacturing unequal thickness glass according to claim 10, characterized in that, In step S1, the expansion hole is etched using an etching solution.

13. The method for manufacturing glass of unequal thickness according to claim 9, characterized in that, After completing step S1, the glass of unequal thickness is pretreated in an environment with a second preset temperature and preset air humidity.

14. The method for manufacturing unequal-thickness glass according to claim 13, characterized in that, The second preset temperature is greater than or equal to 80°C and less than or equal to 90°C, the preset air humidity is greater than or equal to 80% and less than or equal to 90%, and the pretreatment time is greater than or equal to 3 hours and less than or equal to 10 hours.

15. The method for manufacturing glass of unequal thickness according to claim 9, characterized in that, Step S2 includes: S21. Preheat the glass of unequal thickness; S22. The preheated glass of unequal thickness is placed in molten salt with the first preset temperature for strengthening. S23. Anneal the strengthened glass of unequal thickness.

16. The method for manufacturing unequal-thickness glass according to claim 15, characterized in that, In step S21, the preheating time for the glass of unequal thickness is greater than or equal to 20 minutes and less than or equal to 60 minutes, and the preheating temperature is 320°C. In step S23, the annealing time for the glass of unequal thickness is greater than or equal to 30 minutes and less than or equal to 60 minutes, and the annealing temperature is greater than or equal to 240°C and less than or equal to 320°C.

17. The method for manufacturing unequal thickness glass according to claim 15, characterized in that, In step S22, the first preset temperature is greater than or equal to 350°C and less than or equal to 430°C, the time for strengthening the glass of unequal thickness in the molten salt is greater than or equal to 5 minutes and less than or equal to 60 minutes, and the molten salt includes potassium nitrate at a mass ratio of 50%-100% and sodium nitrate at a mass ratio of 0%-50%.

18. The method for manufacturing unequal-thickness glass according to claim 15, characterized in that, Step S2 is performed twice to strengthen the glass of unequal thickness twice.

19. The method for manufacturing unequal-thickness glass according to claim 18, characterized in that, When implementing step S22 for the first time, the first preset temperature is greater than or equal to 340°C and less than or equal to 370°C, the time for strengthening the glass of unequal thickness in the molten salt is greater than or equal to 20 minutes and less than or equal to 50 minutes, and the molten salt includes potassium nitrate with a mass ratio of 10%-65% and sodium nitrate with a mass ratio of 35%-90%. In the second implementation step S22, the first preset temperature is greater than or equal to 340°C and less than or equal to 370°C, the time for strengthening the glass of unequal thickness in the molten salt is greater than or equal to 3 minutes and less than or equal to 20 minutes, and the molten salt includes potassium nitrate with a mass ratio of 65%-95%, sodium nitrate with a mass ratio of 5%-35%, and alumina with a mass ratio of 0.1%-2%.

Images