Pyramid-structure glass mobile phone rear cover and manufacturing process thereof

Abstract

The invention relates to the technical field of mobile phone rear cover manufacturing, and particularly provides a pyramid-shaped structure glass mobile phone rear cover manufacturing process which comprises the following steps: coating a layer of photosensitive material with uniform thickness on the surface of glass by using a mask, and forming a high-precision texture pattern on the surface of a glass substrate through exposure and development; the used etching liquid is acid liquid containing fluorine ions, and the parts which do not need to be etched are protected through the mask, so that the glass with fine textures is obtained; according to the characteristics of the photosensitive material, acid, alkali or other organic solvents are used for removing the residual photosensitive material on the surface of a product after the glass substrate is etched; and performing post-processing to obtain the mobile phone rear cover of which the surface is provided with a plurality of concave-convex texture structures. According to the manufacturing method, the mobile phone rear cover with the adjustable texture height and the pyramid-shaped microstructure is manufactured through the high-precision yellow light photoetching technology and the acid etching technology, the texture effect is guaranteed, and meanwhile the smooth hand feeling effect similar to AG products is achieved.

Description

Technical Field

[0001] The invention mainly relates to the technical field of mobile phone back cover manufacturing, and in particular to a pyramid-shaped structured glass mobile phone back cover and a manufacturing process thereof. Background Art

[0002] With the advent of the 5G era, people generally have higher requirements for electronic devices, which are not only reflected in the performance of use, but also pay more attention to the appearance and decorative performance. As an important part of electronic consumer products, the aesthetics of back cover products are increasingly valued by consumers. Plastic products are highly homogenized and have poor durability. Metal materials shield and interfere with 5G electromagnetic signals. Ceramic materials are expensive and difficult to process. Glass cover plates have high hardness, strong scratch resistance, and strong processability, and are favored by a large number of suppliers and consumers.

[0003] Existing mobile phone back cover products mainly achieve specific effects through film coating or sandblasting. The effect is single and increases the thickness of the product to a certain extent, which is not conducive to the concept of lightweight and thin consumer products. At the same time, this process is cumbersome, costly, and the product has poor wear resistance, and has gradually failed to meet consumers' pursuit of personalization. On this basis, the present invention aims to provide a pyramid-shaped glass mobile phone back cover technology through simple yellow light etching that can achieve high-precision complex graphics, and produce products within specifications according to specific required thickness. This technology increases the durability and aesthetics of the product shell through unique material selection and process, and presents a variety of effects such as pattern, vision, and touch. Summary of the invention

[0004] 1. Technical problem to be solved by the invention: The present invention provides a pyramid-shaped structured glass mobile phone back cover and a manufacturing process thereof, so as to solve the technical problems existing in the above-mentioned background technology.

[0005] 2. Technical solution: In order to achieve the above object, the technical solution of the present invention is as follows: A manufacturing process for a pyramid-shaped glass mobile phone back cover comprises the following steps: Yellow light, using a mask to coat a layer of photosensitive material with uniform thickness on the glass surface, and then forming a high-precision texture pattern on the surface of the glass substrate through exposure and development; Etching, using an acid solution containing fluoride ions as an etching solution, and using a mask to protect the parts that do not need to be etched, thereby obtaining glass with fine textures; Cleaning: According to the characteristics of photosensitive materials, use acid, alkali or other organic solvents to remove the photosensitive materials remaining on the surface of the product after etching the glass substrate; After processing, the product morphology, size and structure are further adjusted according to product requirements to obtain a mobile phone back cover with a plurality of concave and convex texture structures, i.e. a micro-pyramid structure, formed on the surface.

[0006] A further improvement is that the acid solution containing fluorine ions in the etching process is HF or NH4HF2.

[0007] A further improvement is that the acid in the cleaning process is HF or NH4HF2, and the base is KOH or NaOH A further improvement is that the gap design range of the texture pattern is 50 to 80 μm.

[0008] A further improvement is that the design range of the texture height is 5 to 20 μm.

[0009] A further improvement is that the mask pattern used is composed of a plurality of small rectangular blocks, and the arrangement and gaps of the small rectangular blocks are adjusted to achieve various pattern effects.

[0010] A further improvement is that each block has a width of 5 to 10 μm and a length of 50 to 80 μm.

[0011] The invention also discloses a pyramid-shaped glass mobile phone back cover, which is made by the above-mentioned pyramid-shaped glass mobile phone back cover manufacturing process. The surface of the mobile phone back cover is etched with a plurality of concave-convex textures to form a microscopic pyramid structure.

[0012] A further improvement is that the gap design range of the texture pattern is 50 to 80 μm.

[0013] A further improvement is that the design range of the texture height is 5 to 20 μm.

[0014] 3. Beneficial effects: Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention provides a glass mobile phone back cover with a pyramid structure. The glass back cover takes the design of texture arrangement and morphology as the starting point, places special requirements on the glass material selection and thickness, and manufactures a mobile phone back cover with adjustable texture height and pyramid-shaped microscopic morphology through high-precision yellow light photolithography and acid etching processes. The graphic of this structure not only ensures the texture effect but also has the effect of smooth hand feeling similar to AG products. At the same time, the high-precision yellow light process further ensures the diversity of texture effects, while satisfying consumers' pursuit of the appearance and texture of mobile phone back covers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1Schematic diagram of the cross-sectional microstructure of the glass mobile phone back cover after acid etching (upper part) and the cross-sectional microstructure after post-processing (lower part) provided by the present invention; Figure 2 Product appearance pictures of different texture effects of the mobile phone back cover provided by the present invention; Figure 3 Schematic diagrams of four implementation modes of the mobile phone back cover provided by the present invention; Figure 4 This is a texture effect diagram of the mask graphic design provided by the present invention. DETAILED DESCRIPTION

[0016] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0017] This embodiment provides a process for manufacturing a pyramid-shaped glass mobile phone back cover, comprising the following steps: Yellow light, use a mask to coat a layer of photosensitive material with uniform thickness on the glass surface, and then form a high-precision texture pattern on the surface of the glass substrate through exposure and development; Etching, using an acid solution containing fluoride ions as an etching solution, and using a mask to protect the parts that do not need to be etched, thereby obtaining glass with fine textures; Cleaning: According to the characteristics of photosensitive materials, use acid, alkali or other organic solvents to remove the photosensitive materials remaining on the surface of the product after etching the glass substrate; After post-processing, the product morphology, size and structure are further adjusted according to product requirements to obtain a mobile phone back cover with a microscopic pyramid-shaped structure on the surface. The mask plate has graphic design information on it, and the graphic information is transferred to the photosensitive material on the glass surface during the yellow light process.

[0018] The above manufacturing process is used to produce four types of mobile phone back covers as shown in Figures A, B, C, and D, which are specifically analyzed below.

[0019] The glass mobile phone back cover provided in this embodiment has outstanding performance in terms of concave-convex ratio. Figure 3 As shown in Figure 1, its standard pyramid structure (Figure A) has an optimized concave-convex ratio design, which makes the hand feel and various performances reach the best state. Specifically, the concave and convex in Figure A each account for half, with a ratio of 50%. This design not only provides the best hand feel experience, but also performs well in terms of durability, anti-slip and aesthetics.

[0020] Compared with Figure A, the structure of Figure D is closer to Figure A in terms of the concave-convex ratio, with the central convex structure accounting for 40% to 60% of the unit area. This design also performs well in terms of performance and feel, but it is slightly inferior to the standard pyramid structure of Figure A.

[0021] The wavy structure shown in Figure B has a convex structure that accounts for less than 40% of the unit area. Due to the low convex proportion, the wavy structure feels slightly rough. The dome-shaped structure shown in Figure C has a convex part that accounts for more than 60% of the unit area, but due to the high convex proportion, its surface smoothness is low and its anti-slip property is poor. In addition, a high proportion of concave-convex structures is prone to reflection under light, making the visual effect inferior to the pyramid-shaped structure in Figure A.

[0022] The glass mobile phone back cover provided in this embodiment has significant advantages in texture pattern design. The gap design range of the texture pattern is 50-80 μm, which can be adjusted according to specific needs. This design not only ensures durability, but also takes into account the beauty and feel. The etching height design range is 5-20 μm, which is also adjustable. This height design can provide sufficient surface friction and enhance the anti-slip performance without negatively affecting the overall structural strength.

[0023] The surface of the glass mobile phone back cover provided in this embodiment is specially etched to form a microscopic pyramid structure, which can effectively prevent the residue of fingerprints. Compared with traditional smooth glass or other surface treatments, the glass back cover of the present invention reduces the adhesion of fingerprints, so that the back cover of the mobile phone remains clean and beautiful during use. In addition, the special top structure design allows the fingers to feel the smooth effect when touching the back cover. Compared with the wavy structure and the dome structure, the pyramid structure provides a more delicate touch. The microstructure can disperse the pressure applied by the fingers, provide a soft touch experience, and still maintain a good grip even when the fingers are sweating. The wavy and dome structures may become slippery when the fingers are wet. This special surface treatment not only improves the practicality of the product, but also increases the user experience. The user will feel more comfortable when touching the phone. Whether it is one-handed operation or two-handed grip, it can provide a stable and pleasant use experience.

[0024] The wave-shaped structure shown in Figure B has an inward-concave rising hypotenuse, and the whole structure presents a continuous wave shape, although it feels rough to the touch. The surface of the structure in Figure C is relatively smooth, and it has a greater damping feeling when touched by the skin. It becomes very slippery after contact with water, and lacks the textured touch effect. The structure shown in Figure D has a certain anti-slip effect and fine touch. However, compared with the standard pyramid structure in Figure A, it is still slightly inferior in anti-fingerprint effect and smoothness of touch.

[0025] The glass mobile phone back cover provided by the present embodiment has outstanding visual effects. The pyramid structure can maximize the transmittance of light, making the mobile phone back cover look more transparent and crystal clear. The back cover surface has obvious three-dimensional sense and layering. This high transmittance enables the back cover to show clear and bright visual effects under various lighting conditions. In addition, under light irradiation, the pyramid structure can reflect strong light and produce obvious shining effect. This shine makes the mobile phone back cover show dazzling brilliance and visual appeal at different angles and lighting conditions. In addition, the delicate touch and excellent optical performance of the pyramid structure make the mobile phone back cover visually present a high-end and luxurious texture. This high-end texture not only improves the overall grade of the product, but also increases the user's satisfaction.

[0026] In contrast, the transmittance and brilliance of the structure in Figure B are low, and the visual effect is relatively ordinary. Although the structure in Figure C performs well in terms of smoothness, it lacks a sense of three-dimensionality and layering, and is relatively bland visually. Although the structure in Figure D combines the characteristics of the wave shape and the pyramid shape to a certain extent, its visual effect is still inferior to the high transmittance and significant brilliance of the standard pyramid structure (Figure a).

[0027] The glass mobile phone back cover provided in this embodiment has outstanding performance in graphic effects and can realize diversified designs. By adopting a variety of designable mask graphics, the surface of the back cover can present rich pattern effects, such as feathers, rocks, diamonds, etc. These patterns are not only visually beautiful, but also provide excellent touch through unique texture design.

[0028] The mask pattern used is composed of many small rectangular blocks, each of which is 5 to 10 μm wide and 50 to 80 μm long. Figure 4 The texture effect of the mask is shown, and it can be seen that these small rectangular blocks form a complex and orderly pattern. This design has obvious advantages. First, by adjusting the arrangement and gaps of the small rectangular blocks, a variety of different pattern effects can be achieved. This makes the glass phone back cover highly customizable and can meet the aesthetic needs of different users. The diverse pattern design makes the glass phone back cover show a unique light and shadow effect under the light, increasing the visual appeal of the product. Whether it is the softness of feathers, the ruggedness of rocks, or the brilliance of diamonds, they can all leave a deep impression on people visually.

[0029] In summary, the present invention provides a pyramid-shaped glass mobile phone back cover, which takes the design of texture arrangement and morphology as the starting point, and makes special requirements on the selection of glass materials and thickness. Through high-precision yellow light photolithography and acid etching processes, a mobile phone back cover with adjustable texture height and pyramid-shaped microscopic morphology is produced. The graphics of this structure not only ensure the texture effect but also have the effect of smooth feel similar to AG products. At the same time, the high-precision yellow light process further ensures the diversity of texture effects, while satisfying consumers' pursuit of the appearance and texture of mobile phone back covers.

[0030] The above-described embodiments only express a certain implementation mode of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A manufacturing process for a pyramid-shaped glass mobile phone back cover, characterized in that: The following steps are involved: Yellow light, using a mask to coat a layer of photosensitive material with uniform thickness on the glass surface, and then forming a high-precision texture pattern on the surface of the glass substrate through exposure and development; Etching, using an acid solution containing fluoride ions as an etching solution, and using a mask to protect the parts that do not need to be etched, thereby obtaining glass with fine textures; Cleaning: According to the characteristics of photosensitive materials, use acid, alkali or other organic solvents to remove the photosensitive materials remaining on the surface of the product after etching the glass substrate; After processing, the product morphology, size and structure are further adjusted according to product requirements to obtain a mobile phone back cover with a plurality of concave and convex texture structures on the surface.

2. The manufacturing process of a pyramid-shaped glass mobile phone back cover according to claim 1, characterized in that: The acid solution containing fluoride ions in the etching process is HF or NH4HF2.

3. The manufacturing process of a pyramid-shaped glass mobile phone back cover according to claim 1, characterized in that: In the cleaning process, the acid is HF or NH4HF2, and the base is KOH or NaOH.

4. The manufacturing process of a pyramid-shaped glass mobile phone back cover according to claim 1, characterized in that: The gap design range of the texture pattern is 50 to 80 μm.

5. The manufacturing process of a pyramid-shaped glass mobile phone back cover according to claim 1, characterized in that: The design range of texture height is 5 to 20 μm.

6. The pyramid-shaped glass mobile phone back cover according to claim 1, characterized in that: The mask pattern used is composed of many small rectangular blocks. By adjusting the arrangement and gaps of the small rectangular blocks, various pattern effects can be achieved.

7. The pyramid-shaped glass mobile phone back cover according to claim 6, characterized in that: The width of each square is 5 to 10 μm and the length is 50 to 80 μm.

8. A pyramid-shaped glass mobile phone back cover, characterized in that: A plurality of concave-convex textures are etched on the surface of the mobile phone back cover.

9. The pyramid-shaped glass mobile phone back cover according to claim 8, characterized in that: The design range of texture height is 5 to 20 μm.

10. The pyramid-shaped glass mobile phone back cover according to claim 8, characterized in that: The gap design range of the texture pattern is 50 to 80 μm.

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