Substrate and manufacturing method thereof

Abstract

The invention provides a substrate which comprises a first surface, and the first surface is provided with a first texture and a second texture; the first texture comprises a plurality of first pits extending along a first direction; wherein the first concave pit is arranged to be in a block shape; the second texture comprises a plurality of second pits extending in the first direction, and the second pits are arranged to be in a filiform shape. The surface of the substrate provided by the invention is provided with the blocky first pits and the filamentous second pits which are arranged at intervals, and the first textures and the second textures which are adjacent to each other or arranged at intervals are formed, so that compared with single blocky AG textures or single filamentous textures in the prior art, the damping sense and the roughness sense of the substrate can be improved, the appearance is attractive, the surface is silky, and the service life of the substrate is prolonged. The damping feeling is good. According to the substrate manufacturing method, a physical AG wire drawing method is adopted for manufacturing, the effects of wire drawing and AG overlapping on the surface of the substrate can be achieved at the same time, the machining cost is low, and environmental pollution is small.

Description

Technical Field

[0001] The present invention relates to the technical field of substrate products, and in particular to a substrate and a manufacturing method thereof. Background Art

[0002] Most of the existing substrate products are processed by chemical AG on the substrate, and the damping and touch of the products are single, the types are not rich enough, and they cannot meet the needs of all consumers. Common substrates include glass, ceramics, sapphire, etc. Chemical AG is a matte rough surface formed by chemical erosion of the outer surface of the substrate. However, the AG surface obtained above is a concave and convex up and down structure, the surface damping is strong, the touch is sharp, and there is no silky feeling. Therefore, the art needs a substrate product with beautiful appearance, silky surface, and good damping. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a substrate with beautiful appearance, smooth surface and good damping feeling and a manufacturing method thereof.

[0004] The present invention provides a substrate, including a first surface, having a first texture and a second texture on the first surface; the first texture includes a plurality of first pits extending along a first direction; wherein the first pits are arranged in a block shape; the second texture includes a plurality of second pits extending along the first direction, wherein the second pits are arranged in a filament shape.

[0005] Further, the plurality of first pits on the same first texture are connected to each other through the second pits; and / or the plurality of first pits on the same first texture are spaced apart from each other; and / or the plurality of second pits on the same second texture are connected to each other; and / or the plurality of second pits on the same second texture are spaced apart from each other.

[0006] Furthermore, the ratio of the sum of the areas of all the first pits to the sum of the areas of all the second pits is in the range of (3.5-4.1):1.

[0007] Furthermore, the distance between the edges of two adjacent first pits is in the range of 0-5 um.

[0008] Furthermore, the distance between the edges of two adjacent second pits is in the range of 0.1-1 mm.

[0009] Further, the ratio of the maximum length of the second pit along the first direction to the maximum length of the first pit along the first direction is in a range of 40 to 120;

[0010] And / or, the percentage of the number of the first pits with a maximum length range of 42um to 75um along the first direction to the number of all the first pits is 85 to 96%; preferably, the maximum length range of the first pits along the first direction is 51um to 54um;

[0011] And / or, the percentage of the second pits whose maximum length range along the first direction is within the range of 3mm to 5mm accounts for 82% to 98% of the total number of the second pits; preferably, the maximum length range of the second pits along the first direction is 4.0mm to 4.5mm.

[0012] Further, the ratio of the maximum width of the first pit along the direction perpendicular to the first direction to the maximum width of the second pit along the direction perpendicular to the first direction is in a range of 2 to 72;

[0013] And / or, the percentage of the number of the first pits with a maximum width range of 6.7um to 12.3um along the direction perpendicular to the first direction to the number of all the first pits is 82 to 98%; preferably, the maximum width range of the first pits along the direction perpendicular to the first direction is 9um to 11um;

[0014] And / or, the percentage of the second pits whose maximum width ranges from 0.17um to 3.3um along the first direction perpendicular to the first direction accounts for 88% to 97% of the total number of the second pits; preferably, the maximum width range of the second pits along the first direction perpendicular to the first direction is 1.6um to 2.4um.

[0015] Further, the ratio of the maximum depth of the first pit to the maximum depth of the second pit is in the range of 2 to 8;

[0016] And / or, the percentage of the number of the first pits with a maximum depth ranging from 0.7um to 2.2um to the number of all the first pits is 85-93%; preferably, the maximum depth of the first pits ranges from 1.0um to 1.3um;

[0017] And / or, the percentage of the number of the second pits with a maximum depth ranging from 0.25um to 0.4um to the number of all the second pits is 85-95%; preferably, the maximum depth of the second pits ranges from 0.28um to 0.32um.

[0018] Furthermore, the surface roughness of the substrate is 0.42 um to 0.48 um, the haze is 60% to 72%, and the visible light transmittance is 75% to 80%.

[0019] The present invention also provides a method for manufacturing a substrate, comprising: grinding the substrate surface by means of planetary wheel processing, using a grinding pad with diamond abrasives and a coarse grinding liquid containing fine diamond powder particles at the same time.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The surface of the substrate provided by the present invention has first block-shaped pits and second filament-shaped pits arranged at intervals, and forms first textures and second textures that are adjacent to or arranged at intervals. Compared with the single block AG texture or single filamentary texture in the prior art, the damping and roughness of the substrate can be improved, and the appearance is beautiful, the surface is silky, and the damping is good.

[0022] The substrate manufacturing method provided by the present invention adopts a physical AG wiredrawing method. In this method, a planetary wheel is used for processing, and a grinding pad with diamond abrasives and a coarse grinding liquid containing fine diamond powder particles are used to grind the surface of the substrate. The substrate surface can achieve the effects of wiredrawing and AG superposition at the same time, and the processing cost is low and the environmental pollution is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the surface structure of a substrate according to an embodiment of the present invention;

[0025] Figure 2 A surface structure diagram of a substrate according to an embodiment of the present invention;

[0026] Figure 3 A cross-sectional structural diagram of a substrate according to an embodiment of the present invention;

[0027] Figure 4 This is the surface structure diagram of the back cover of the Chemical AG mobile phone;

[0028] Figure 5 This is the horizontal cross-sectional structure diagram of the back cover of the Chemical AG mobile phone;

[0029] Figure 6 To verify the surface structure of the substrate obtained in Example 1;

[0030] Figure 7 To verify the surface structure of the substrate obtained in Example 2;

[0031] Figure 8 To verify the surface structure of the substrate obtained in Example 3;

[0032] Fig. 9 To verify the surface structure of the substrate obtained in Example 4;

[0033] Fig.10 This is a surface structure diagram of the substrate obtained in Comparative Example 1;

[0034] Fig.11 A normal distribution histogram and a fitting curve of the length size range of the first pit in the substrate in the embodiment of the present application;

[0035] Fig.12 A normal distribution histogram and a fitting curve of the length size range of the second pits in the substrate in the embodiment of the present application;

[0036] Fig.13 A normal distribution histogram and a fitting curve of the width size range of the first pit in the substrate in the embodiment of the present application;

[0037] Fig.14 A normal distribution histogram and a fitting curve of the width size range of the second pits in the substrate in the embodiment of the present application;

[0038] Fig.15 A normal distribution histogram and a fitting curve of the depth size range of the first pit in the substrate in the embodiment of the present application;

[0039] Fig.16 A normal distribution histogram and a fitting curve of the depth size range of the second pits in the substrate in the embodiment of the present application;

[0040] Figures 17 to 19 The picture shows that the glass surface in the prior art only has a brushed texture.

[0041] The accompanying drawings are marked as:

[0042] 1: first pit; 2: second pit. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In addition, the terms "first" and "second" 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 as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the field of consumer electronics, common substrates include glass, ceramics, sapphire, etc., and the substrates can be processed into products. In specific applications, the substrates can be used in the back cover of mobile phones. In order to make the back cover of the mobile phone meet the needs of consumers, the substrates are usually processed by surface treatment (AG processing).

[0047] like Figure 1 As shown, an embodiment of the present invention provides a substrate, including a first surface, having a first texture and a second texture on the first surface; the first texture includes a plurality of first pits 1 extending along a first direction. The first pits 1 are configured in a block shape; the second texture includes a plurality of second pits 2 extending along the first direction, and the second pits 2 are configured in a filament shape. In this solution, the first texture and the second texture are arranged in a naturally formed interval, which is a component formed by AG and wire drawing, and can enhance the hand feel and damping. The setting of the block-shaped first pits 1 and the filament-shaped second pits 2 is conducive to increasing the roughness of the substrate and improving the damping and roughness of the back cover of the mobile phone.

[0048] Among them, Figure 1As described, the first plurality of pits 1 on the same first texture are connected to each other through the second pits 2, and the second plurality of pits 2 on the same second texture are arranged at intervals. The first texture and the second texture are closely arranged, which mainly plays the role of making the surface rough with a damping effect. It can be understood that in other embodiments, the first plurality of pits 1 on the same first texture can also be arranged at intervals, and the second plurality of pits 2 on the same second texture can also be connected to each other. The above first texture and second texture can be combined in pairs to achieve the same technical effect.

[0049] In the technical solution of the embodiment of the present application, the ratio of the sum of the areas of all the first pits 1 to the sum of the areas of all the second pits 2 is in the range of (3.5-4.1):1. When the area ratio of the first pits to the second pits on the first surface of the substrate is in this range, the distribution area of ​​the filamentary pits and the blocky pits on the first surface of the substrate is reasonable, so that the density of the filamentary texture on the appearance of the first surface is moderate, and the texture is arranged in an orderly manner; it feels delicate and has a matte texture.

[0050] If the ratio of the total area of ​​the first dimples to the total area of ​​the second dimples is greater than 4.1, the number of filamentary textures on the first surface is relatively sparse, and the filamentary texture effect is relatively unsatisfactory when viewed from the outside; the hand feel is relatively rough, and the silky feel is poor. If the ratio of the total area of ​​the first dimples to the second dimples is less than 3.5, the number of filamentary textures on the first surface is relatively dense, and the filamentary texture effect is also relatively unsatisfactory when viewed from the outside; the hand feel is relatively silky, and the roughness is relatively low.

[0051] Exemplarily, the length and width dimensions of the first surface of the substrate are: 150mm*70mm; the area of ​​one of the first pits is 0.0008856mm2; there are approximately 10,000,000 first pits evenly distributed on the first surface; the sum of the areas of all the first pits accounts for approximately 80% to 84.34% of the area of ​​the first surface; the area of ​​one of the second pits is 0.0165mm2, and there are approximately 96,000 second pits evenly distributed on the first surface; the sum of the areas of all the second pits accounts for approximately 15.66% to 20% of the area of ​​the second surface.

[0052] In the technical solution of the embodiment of the present application, the spacing between the edges of two adjacent first pits 1 ranges from 0 to 5um; the first pits 1 are irregularly distributed as a whole. If the spacing between the edges of two adjacent first pits 1 is too large, it will affect the roughness, haze and transmittance of the first surface.

[0053] In the technical solution of the embodiment of the present application, the spacing between the edges of two adjacent second pits 2 is in the range of 0.1-1 mm, ensuring a smooth and delicate wire drawing effect.

[0054] In the technical solution of the embodiment of the present application, the ratio of the maximum length of the second pit 2 along the first direction to the maximum length of the first pit 1 along the first direction is in the range of 40 to 120, which can ensure the beautiful appearance and comfortable feel of the first surface. Along the first direction, when the maximum length ratio between the second pit 2 and the first pit 1 is less than 40, the length difference between the first pit 1 and the second pit 1 is small, the roughness of the first surface will be low, the damping feeling of the first surface will be reduced, the feel will be smoother, and the haze will also be reduced, and the corresponding transmittance will be high. Along the first direction, when the maximum length ratio between the second pit 2 and the first pit 1 is greater than 120, the length difference between the first pit 1 and the second pit 2 is large, the roughness of the first surface will be large, the damping feeling of the first surface will be high, the feel will be rougher, and the haze will also increase, and the corresponding transmittance will be low.

[0055] For example, when the substrate of the present application is applied to the back cover of a mobile phone, in order to ensure that the back cover of the mobile phone has a beautiful appearance and a comfortable feel, in this embodiment, reference Fig.11 The percentage of first pits 1 with a maximum length range of 42um to 75um along the first direction accounts for 85% to 96% of all first pits 1. The number of first pits 1 with a maximum length outside the range of 42um to 75um along the first direction is small, and the impact on the surface effect is very small and can be almost ignored.

[0056] If the maximum length of the first pits 1 along the first direction is less than 42 μm, the surface roughness and damping will be reduced. If the maximum length of the first pits along the first direction is greater than 75 μm, the surface roughness and the feel will be rough.

[0057] It should be noted that Fig.11 The figure shows the proportion of the first pits 1 with a maximum length dimension along the first direction ranging from 42 um to 75 um, and the proportion of the first pits with a maximum length dimension along the first direction less than 42 um and greater than 75 um is not shown.

[0058] In a specific embodiment, reference Fig.11, the maximum length size range of the first pit 1 along the first direction is 50um~62um, accounting for a large proportion, about 71%~75%. This length interval data is an important distribution range of the roughness, haze, and transmittance parameters, achieving a good delicate feel and silky damping effect. Among them, 51um~54um is the most preferred length size range, accounting for about 30%~32%. In addition, the maximum length size range of the first pit 1 along the first direction is 42um~50um, accounting for about 4%~8%. This length interval data is the distribution range of the auxiliary component parameters, making the roughness slightly lower, the haze slightly lower, the transmittance slightly higher, the feel more delicate, and the damping feel more silky. The maximum length size range of the first pit 1 along the first direction is 62um~72um, accounting for about 10%~13%. This length interval data is the distribution range of the auxiliary component parameters, with slightly higher roughness, slightly higher haze, and slightly lower transmittance, and a more delicate feel and a more silky damping feel.

[0059] When the substrate of the present application is applied to the back cover of a mobile phone, in order to ensure that the back cover of the mobile phone has a beautiful appearance and a comfortable feel, in this embodiment, reference Fig.12 The percentage of the first pits 1 with a maximum length in the range of 3 mm to 5 mm along the first direction to all the second pits 2 is 82 to 98%.

[0060] The number of the second pits 2 with a maximum length outside the range of 3 mm to 5 mm along the first direction is relatively small, and the influence on the surface effect is very small and can be almost ignored.

[0061] If the maximum length of the second dimples 2 along the first direction is less than 3 mm, the surface roughness and damping will be reduced. If the maximum length of the second dimples 2 along the first direction is greater than 5 mm, the surface roughness will be increased and the hand feel will be rough.

[0062] It should be noted that Fig.12 The figure shows the proportion of the second pits 2 whose maximum length dimension along the first direction is in the range of 3 mm to 5 mm, and the proportion of the second pits 2 whose maximum length dimension along the first direction is less than 3 mm and greater than 5 mm is not shown.

[0063] For example, reference Fig.12, the maximum length size range of the second pit 2 along the first direction is 3.2mm~4.6mm, accounting for a large proportion, about 68%~75%. This length interval data is an important distribution range of the roughness, haze, and transmittance parameters, achieving a good delicate feel and silky damping effect. Among them, 4.0mm~4.5mm is the most preferred length range, and accounts for about 20%~27%. In addition, the maximum length size range of the second pit 2 along the first direction is 3mm~3.2mm, accounting for about 6%~10%. This length interval data is the distribution range of the auxiliary component parameters, making the roughness slightly lower, the haze slightly lower, the transmittance slightly higher, the feel more delicate, and the damping feel more silky. The maximum length size range of the second pit 2 along the first direction is 4.6mm~5mm, accounting for about 8%~13%. This length interval data is the distribution range of the auxiliary component parameters, with slightly higher roughness, slightly higher haze, and slightly lower transmittance, and the feel is more delicate and the damping feel is more silky.

[0064] In the technical solution of the embodiment of the present application, the ratio of the maximum width of the first pit 1 along the direction perpendicular to the first direction to the maximum width of the second pit 2 along the direction perpendicular to the first direction is in the range of 2 to 72. It can ensure that the appearance of the first surface is beautiful and the feel is comfortable. When the ratio of the maximum width of the second pit 2 to the first pit 1 along the direction perpendicular to the first direction is less than 2, the width difference between the first pit 1 and the second pit 1 is small, the roughness of the first surface will be low, the damping feeling of the first surface will be reduced, the feel is smoother, and the haze will also be reduced. At this time, the corresponding transmittance is high. When the ratio of the maximum width of the second pit 2 to the first pit 1 along the direction perpendicular to the first direction is greater than 72, the width difference between the first pit 1 and the second pit 2 is large, the roughness of the first surface will increase, the damping feeling of the first surface will be higher, the feel is rougher, and the haze will also increase. At this time, the corresponding transmittance is low.

[0065] In order to ensure the appearance and comfortable feel of the mobile phone back cover, in this embodiment, reference Fig.13 The number of first pits 1 with a maximum width dimension range of 6.7um to 12.3um along the first direction perpendicular to the first direction accounts for 82% to 98% of all first pits 1; the number of first pits 1 with a maximum width dimension range other than 6.7um to 12.3um along the first direction perpendicular to the first direction is small, and the impact on the surface effect is very small and can be almost ignored.

[0066] If the width of the first dimples 1 is less than 6.7 μm, the surface roughness and damping will be reduced. If the width of the first dimples 1 is greater than 12.3 μm, the surface roughness will be increased and the hand feeling will be rough.

[0067] It should be noted that Fig.13The figure shows the proportion of the first pits 1 with a maximum width ranging from 6.7 um to 12.3 um along the direction perpendicular to the first direction, and the proportion of the first pits 1 with a maximum width less than 6.7 um and greater than 12.3 um is not shown.

[0068] For example, in a specific embodiment, reference is made to Fig.13 , the maximum width size range of the first pit 1 along the perpendicular direction is 8.9um~11.5um, accounting for a large proportion, about 78%~88%. This width interval data is an important distribution range of the roughness, haze, and transmittance parameters, achieving a good delicate feel and silky damping effect. Among them, 9um~11um is the most preferred width size range, and accounts for about 57%~71%. In addition, the maximum width size range of the first pit 1 along the perpendicular direction is 6.7um~8.9um, accounting for about 2%~6%. This width interval data is the distribution range of the auxiliary component parameters: making the roughness slightly lower, the haze slightly lower, the transmittance slightly higher, the feel more delicate, and the damping feel more silky. The width size range of the first pit 1 is 11.5um~12.3um, accounting for about 2%~4%. This width interval data is the distribution range of the auxiliary component parameters, with slightly higher roughness, slightly higher haze, and slightly lower transmittance, and the feel is more delicate and the damping feel is more silky.

[0069] In order to ensure the appearance and comfortable feel of the mobile phone back cover, in this embodiment, reference Fig.14 The number of second pits 2 with a maximum width ranging from 0.17um to 3.3um along the direction perpendicular to the first direction accounts for 88% to 97% of all second pits 2.

[0070] The number of the second pits 2 with a maximum width outside the range of 0.17 um to 3.3 um along the direction perpendicular to the first direction is small, and the influence on the surface effect is very small and can be almost ignored.

[0071] If the maximum width of the second dimples 2 along the direction perpendicular to the first direction is less than 0.17 mm, the surface roughness and damping will be reduced. If the maximum width of the second dimples 2 along the direction perpendicular to the first direction is greater than 3.3 μm, the surface roughness and the feel will be rough.

[0072] For example, it should be noted that: Fig.14 The figure shows the proportion of the second pits 2 with the maximum width dimension ranging from 0.17 um to 3.3 um along the direction perpendicular to the first direction, and the proportion of the second pits 2 with the width dimension less than 0.17 mm and greater than 3.3 um is not shown.

[0073] refer to Fig.14, the maximum width size range of the second pit 2 along the perpendicular direction to the first direction is 1.0um~2.6um, accounting for a large proportion, about 70%~72%. This width interval data is an important distribution range of the roughness, haze, and transmittance parameters, achieving a good delicate feel and silky damping effect. Among them, the maximum width size range of the second pit 2 along the perpendicular direction to the first direction is 1.6um~2.4um, which is the most preferred width range, and accounts for about 40%~53%. In addition, the maximum width size range of the second pit 2 along the perpendicular direction to the first direction is 0.17um~1um, accounting for about 2%~7%. This width interval data is the distribution range of the auxiliary component parameters, making the roughness slightly lower, the haze slightly lower, the transmittance slightly higher, the feel more delicate, and the damping feel more silky. The maximum width of the second pit 2 along the direction perpendicular to the first direction is in the range of 2.6um to 3.3um, accounting for about 16% to 18%. The data in this width range is the distribution range of the auxiliary component parameters, with slightly higher roughness, slightly higher haze, slightly lower transmittance, a more delicate feel, and a smoother damping feel.

[0074] In the technical solution of the embodiment of the present application, the maximum depth ratio between the first pit 1 and the second pit 2 is 2 to 8. It can ensure that the first surface has a beautiful appearance and a comfortable feel. When the maximum depth ratio between the second pit 2 and the first pit 1 is less than 2, the depth difference between the first pit 1 and the second pit 1 is small, the roughness of the first surface will be low, the damping feeling of the first surface will be reduced, the feel will be smoother, and the haze will also be reduced. At this time, the corresponding transmittance is too high. When the maximum depth ratio between the second pit 2 and the first pit 1 is greater than 8, the depth difference between the first pit 1 and the second pit 2 is large, the roughness of the first surface will be high, the damping feeling of the first surface will be high, the feel will be rougher, and the haze will also increase. At this time, the corresponding transmittance is low.

[0075] When the substrate of the present application is applied to the back cover of a mobile phone, in order to ensure that the back cover of the mobile phone has a beautiful appearance and a comfortable feel, in this embodiment, reference Fig.15 The number of first pits 1 with a maximum depth size range of 0.7um to 2.2um accounts for 85% to 93% of all first pits 1; the number of first pits 1 with a maximum depth size outside the range of 0.7um to 2.2um is small, and the impact on the surface effect is very small and can be almost ignored.

[0076] If the maximum depth of the first dimples 1 is less than 0.7um, the surface roughness and damping will be reduced. If the depth of the first dimples is greater than 2.2um, the surface roughness and the feel will be rough.

[0077] It should be noted that Fig.15The figure shows the proportion of the first pits 1 with a maximum depth size ranging from 0.7 um to 2.2 um, and the proportion of the first pits 1 with a maximum depth size less than 0.7 um and greater than 2.2 um is not shown.

[0078] For example, reference Fig.15 , the maximum depth size range of the first pit 1 is 0.8um~1.3um, which accounts for a large proportion, about 79%~81%. This section of depth interval data is an important distribution range of the roughness, haze, and transmittance parameters, achieving a good delicate feel and silky damping effect. Among them, 1.0um~1.3um is the most preferred maximum depth range, and accounts for about 67%~75%. In addition, the maximum depth size range of the first pit 1 is 0.7um~0.8um, which accounts for about 2%~4%. This section of depth interval data is the distribution range of auxiliary component parameters, making the roughness slightly lower, the haze slightly lower, the transmittance slightly higher, the feel more delicate, and the damping feel more silky. The maximum depth size range of the first pit 1 is 1.3um~2.2um, which accounts for about 4%~8%. This section of depth interval data is the distribution range of auxiliary component parameters, with slightly higher roughness, slightly higher haze, and slightly lower transmittance, and the feel is more delicate and the damping feel is more silky.

[0079] When the substrate of the present application is applied to the back cover of a mobile phone, in order to ensure that the back cover of the mobile phone has a beautiful appearance and a comfortable feel, in this embodiment, reference Fig.16 The number of second pits 2 with a maximum depth size ranging from 0.25um to 0.4um accounts for 85% to 95% of all second pits 2.

[0080] The number of the second pits 2 with a maximum depth outside the range of 0.25um to 0.4um is small, and the influence on the surface effect is very small and can be almost ignored.

[0081] If the maximum depth of the second dimples 2 is less than 0.25 mm, the surface roughness and damping will be reduced. If the maximum depth of the second dimples 2 is greater than 0.4 μm, the surface roughness and the feel will be rough.

[0082] It should be noted that Fig.16 The figure shows the proportion of the second pits 2 with a maximum depth size ranging from 0.25 um to 0.4 um, and the proportion of the second pits 2 with a maximum depth size less than 0.25 um and greater than 0.4 um is not shown.

[0083] For example, reference Fig.16, the maximum depth size range of the second pit 2 is 0.25um~0.27um, accounting for about 12%~14%. This depth interval data is the distribution range of the auxiliary component parameters, which makes the roughness slightly lower, the haze slightly lower, the transmittance slightly higher, the feel more delicate, and the damping feel more silky. The maximum depth size range of the second pit 2 is 0.27um~0.37um, accounting for a large proportion, about 62%~68%. This depth interval data is an important distribution range of the composition roughness, haze, and transmittance parameters, achieving a good delicate feel and silky damping effect. Among them, 0.28um~0.32um is the most preferred depth range, and accounts for about 28%~36%. The depth size range of the second pit 2 is 0.37um~0.4um, accounting for about 11%~13%. This depth interval data is the distribution range of the auxiliary component parameters, with slightly higher roughness, slightly higher haze, and slightly lower transmittance, and a more delicate feel and a more silky damping feel.

[0084] It should be noted that the substrate structure in the present invention is obtained by pure physical processing and is in natural form AG, such as Figure 2 As shown, the microstructure is characterized by small irregular micro-pits distributed in clusters, and the microstructure is a first pit 1 and a second pit 2 arranged alternately.

[0085] The first pit 1 of the present invention produces a frosted effect, and the second pit 2 produces a brushed effect. This solution mechanically forms fine pits and a filamentary damage layer on the surface, and simultaneously produces an AG frosted effect and a brushed effect on the surface of the product. The second pit 2 is longer than the first pit 1, and its width and depth are both smaller than the first pit 1. And the transverse cross-section of the first pit 1 is Figure 3 The arc shown is compared to Figure 4 and Figure 5 The chemical AG on the sharp surface shown can achieve a silky smooth surface and good damping effect.

[0086] If the first surface of the substrate is entirely made up of first pits and no second pits are processed, such as Figure 4 As shown, the surface of the substrate feels rough and does not have a brushed effect or a delicate feel.

[0087] If the first surface of the substrate is entirely made up of second pits and no first pits are processed, the surface only has a brushed effect and feels silky. Figures 17 to 19 The microscopic picture shows that the glass surface in the prior art is all brushed texture.

[0088] In the embodiment of the present invention, the brushed texture and the frosted texture are interwoven, so that it has both a frosted feel and a brushed appearance effect; further, the surface roughness of the substrate structure is 0.42um to 0.48um. Roughness refers to the microscopic geometric shape characteristics of the processed surface composed of small spacing and peaks and valleys. The selection of roughness in this scheme can effectively prevent the damping feeling caused by the glass slipping, which can not only prevent the glass from slipping but also reflect the appearance texture of the glass. The haze of the substrate structure is 60% to 72%. Haze refers to the percentage of the intensity of the transmitted light that deviates from the incident light by more than 2.5 degrees. The lower the haze, the higher the transmittance, the lower the surface roughness, the sparser the arrangement of the surface pits, and the smaller the drop of the pits; the higher the haze, the lower the transmittance, the higher the surface roughness, the denser the arrangement of the surface pits, and the larger the drop of the pits. The haze of this case is set between 60% and 72%, which can see the cloudy or turbid appearance of the product and achieve a good appearance effect. The visible light transmittance of the substrate structure is 75% to 80%. Visible light transmittance refers to the ratio of the light that is projected and passes through the glass to the projected light during the process of incident light passing through the glass. The present invention not only has the characteristics of AG effect on the surface, but also can display the effect of the mobile phone elements on the back through AG on the surface to enhance the overall texture.

[0089] On the other hand, an embodiment of the present invention provides a method for manufacturing a substrate structure, comprising: grinding the surface of the substrate by means of a planetary wheel processing method, using a grinding pad with diamond abrasives and a coarse grinding liquid containing fine diamond powder particles at the same time. The planetary wheel processing method is conducive to ensuring that the trajectories of the first texture and the second texture extend in the same direction. In the prior art, if AG is performed first and then wire drawing, the surface roughness after AG is higher, the photoresist cannot be fully closed, and the light exposure is serious; if wire drawing is performed first and then AG, AG will destroy the wire drawing effect. The present invention uses a grinding pad with diamond abrasives and a coarse grinding liquid containing fine diamond powder particles to grind the surface of the back cover of the mobile phone at the same time, and simultaneously achieves the effect of wire drawing and AG superposition, and has low processing cost and low environmental pollution. The surface of the back cover of the mobile phone is ground by a planetary wheel coarse grinding method. The back cover of the mobile phone to be ground is fixed on the planetary wheel, and the back cover of the mobile phone is ground by a grinding pad. The grinding pad has a coarse grinding liquid filling port, and the coarse grinding liquid can be filled at the same time, thereby realizing the function of grinding the surface of the back cover of the mobile phone by using a grinding pad with diamond abrasives and a coarse grinding liquid containing fine diamond micro-powder particles at the same time.

[0090] In one aspect of the embodiment of the present invention, the grinding pad is a diamond grinding pad, including diamond abrasives of various particle sizes, the grinding pad is bonded to the grinding disc on the machine, the diamond abrasives destroy the glass surface, and the product surface forms an oblate first pit 1. During the processing, the grinding pad can quickly destroy the spacing of the glass surface through mechanical friction with the glass surface and the spacing of the small cubes of the grinding pad, thereby forming irregular but ranged fine pit-shaped microscopic features.

[0091] In one aspect of the embodiment of the present invention, the rough grinding liquid contains fine diamond powder particles. During the mechanical rotation, the diamond liquid rubs against the glass surface, and a brushed elongated pit 2 is formed on the product surface. The diamond liquid is a liquid abrasive, which is generally mixed with a suspending agent. While the grinding pad and the glass surface are mechanically rubbed, the diamond liquid can form mechanical brushed lines on the glass surface. The lines are arc-shaped. Since the diamond liquid is too fine, it is difficult to see with the naked eye. Only through a special dark background film can the brushed lines be magnified to form a unique line effect.

[0092] The present application can obtain substrate surface parameters with a surface roughness of 0.42um to 0.48um, a haze of 60% to 72%, and a visible light transmittance of 75% to 80% by adjusting the grinding pad particle size, the coarse grinding liquid particle size, and the grinding pressure.

[0093] In Comparative Example 1, reference Fig.10 The surface parameters of the substrate obtained by direct grinding without adding rough grinding liquid are: roughness is 0.1um-0.35um, haze is 40%-60%, and transmittance is 60%-70%. The roughness, haze and transmittance are all low.

[0094] In the verification example 1, the particle size of the grinding pad is 9 um, the particle size of the coarse grinding liquid is 0.4 um, the pressure is 0.15 MPa, and the size of the first pit 1 is: length: 70 um, width: 6.7 um, depth: 0.7 um. The substrate surface obtained is as follows Figure 6 As shown, the surface parameters are: roughness 0.42, haze 60%, transmittance 79%. It meets the parameter requirements of the present invention. It has beautiful appearance, smooth surface and good damping feeling.

[0095] In Verification Example 2, the particle size of the grinding pad is 9 um, the particle size of the coarse grinding liquid is 0.4 um, and the pressure is 0.19 MPa. The dimensions of the first pit 1 obtained are: length: 42 um, width: 10.3 um, depth: 1.2 um. The substrate surface obtained is as follows Figure 7 As shown, the surface parameters are: roughness 0.46, haze 62%, transmittance 79%. It meets the parameter requirements of the present invention. It has beautiful appearance, smooth surface and good damping feeling.

[0096] In Verification Example 3, the particle size of the polishing pad is 9 um, the particle size of the coarse grinding liquid is 0.4 um, the pressure is 0.2 MPa, and the size of the first pit 1 obtained is: length: 58 um, width: 12.3 um, depth: 2.2 um. The substrate surface obtained is as follows Figure 8 As shown, the surface parameters are: roughness 0.48, haze 61%, transmittance 75%. It meets the parameter requirements of the present invention. It has beautiful appearance, smooth surface and good damping feeling.

[0097] In Verification Example 4, the particle size of the grinding pad is 9 um, the particle size of the coarse grinding liquid is 0.4 um, the pressure is 0.17 MPa, and the size of the first pit 1 is: length: 72 um, width: 11.1 um, depth: 1.9 um. The substrate surface obtained is as follows Fig. 9 As shown, the surface parameters are: roughness 0.48, haze 63%, transmittance 79%. It meets the parameter requirements of the present invention. It has beautiful appearance, smooth surface and good damping feeling.

[0098] It should be noted that the process selection can be made according to the requirements of the substrate to be manufactured through the planetary wheel processing method. For example, one of the processes selected can be 2D single-sided planetary wheel rough grinding process, 2D double-sided planetary wheel rough grinding and single-sided polishing process, 3D single-sided planetary wheel rough grinding process, 3D double-sided planetary wheel rough grinding and concave surface re-polishing process.

[0099] Among them, the solution of using 2D single-sided planetary wheel rough grinding process can quickly complete the 2D mechanical brushed AG effect, and the process flow is fast and the cost is low.

[0100] The solution of 2D double-sided planetary wheel rough grinding and single-sided polishing can quickly achieve 2D mechanical brushed AG effect. By re-polishing one side, the poor appearance of one side can be abandoned, and the yield of mechanical brushed AG effect can be improved by retaining the other side. By single-sided polishing + four-sided polishing, the strength of the four sides and the entire surface of mechanical brushed AG can be improved.

[0101] The 3D single-sided planetary wheel rough grinding process can quickly achieve the 3D mechanical brushed AG effect, and the process is fast, low-cost and has diversified application directions.

[0102] The 3D double-sided planetary wheel rough grinding and concave surface re-polishing process can quickly achieve the 3D mechanical brushed AG effect. At the same time, through single-sided re-polishing, the poor appearance of one side can be abandoned, and the other side can be retained to improve the yield of the mechanical brushed AG effect. Through single-sided polishing, the flatness of the entire surface can be improved, and the effect of mechanical drawing AG caused by local mold damage during hot bending can be improved, while the poor appearance of 3D products can be improved. Through the concave surface re-grinding solution, the stress strength of the 3D curved surface can be improved, and the application scope of mechanical brushed AG products (such as automotive, smart panels, etc.) can be improved as a whole.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A substrate, characterized in that: The invention comprises a first surface, wherein the first surface has a first texture and a second texture; the first texture comprises a plurality of first pits (1) extending along a first direction; wherein the first pits (1) are arranged in a block shape; and the second texture comprises a plurality of second pits (2) extending along the first direction, wherein the second pits (2) are arranged in a filament shape.

2. The substrate according to claim 1, characterized in that The plurality of first pits (1) on the same first texture are connected to each other via the second pits (2); and / or the plurality of first pits (1) on the same first texture are spaced apart from each other; And / or a plurality of the second pits (2) on the same second texture are connected to each other; and / or a plurality of the second pits (2) on the same second texture are spaced apart from each other.

3. The substrate according to claim 1, characterized in that The ratio of the sum of the areas of all the first pits (1) to the sum of the areas of all the second pits (2) is in the range of (3.5-4.1):

1.

4. The substrate according to claim 1, characterized in that The distance between the edges of two adjacent first pits (1) is in the range of 0-5 um.

5. The substrate according to claim 1, characterized in that The distance between the edges of two adjacent second pits (2) is in the range of 0.1-1 mm.

6. The substrate according to claim 1, characterized in that The ratio of the maximum length of the second pit (2) along the first direction to the maximum length of the first pit (1) along the first direction is in the range of 40 to 120; And / or, the percentage of the number of the first pits (1) with a maximum length range of 42um to 75um along the first direction to the number of all the first pits (1) is 85 to 96%; preferably, the maximum length range of the first pits (1) along the first direction is 51um to 54um; And / or, the percentage of the number of the second pits (2) with a maximum length range of 3mm to 5mm along the first direction to the number of all the second pits (2) is 82% to 98%; preferably, the maximum length range of the second pits (2) along the first direction is 4.0mm to 4.5mm.

7. The substrate according to claim 1, characterized in that The ratio of the maximum width of the first pit (1) along the direction perpendicular to the first direction to the maximum width of the second pit (2) along the direction perpendicular to the first direction is in the range of 2 to 72; And / or, the percentage of the number of the first pits (1) with a maximum width in the range of 6.7um to 12.3um along the direction perpendicular to the first direction to the number of all the first pits (1) is 82 to 98%; preferably, the maximum width of the first pits (1) in the range of 9um to 11um along the direction perpendicular to the first direction; And / or, the percentage of the number of the second pits (2) with a maximum width range of 0.17um to 3.3um along the first direction perpendicular to the first direction to the number of all the second pits (2) is 88% to 97%; preferably, the maximum width range of the second pits (2) along the first direction perpendicular to the first direction is 1.6um to 2.4um.

8. The substrate according to claim 1, characterized in that The ratio of the maximum depth of the first pit (1) to the maximum depth of the second pit (2) is in the range of 2 to 8; And / or, the percentage of the number of the first pits (1) with a maximum depth in the range of 0.7um to 2.2um to the number of all the first pits (1) is 85 to 93%; preferably, the maximum depth of the first pits (1) is in the range of 1.0um to 1.3um; And / or, the percentage of the number of the second pits (2) with a maximum depth range of 0.25um to 0.4um to the number of all the second pits (2) is 85 to 95%; preferably, the maximum depth range of the second pits (2) is 0.28um to 0.32um.

9. The substrate according to any one of claims 1 to 8, characterized in that The surface roughness of the substrate is 0.42um-0.48um, the haze is 60%-72%, and the visible light transmittance is 75%-80%.

10. A method for manufacturing a substrate, characterized in that: include: The substrate surface is ground by means of planetary wheel processing, using a grinding pad with diamond abrasives and a coarse grinding liquid containing fine diamond powder particles.

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