Mobile phone backboard

Abstract

The utility model discloses a mobile phone backboard, and belongs to the technical field of electronic products. The mobile phone backboard provided by the utility model comprises a substrate layer and a pattern layer electroplated on one surface of the substrate layer. A first material layer, a second material layer and a third material layer are sequentially electroplated on the substrate layer along the direction far away from the substrate layer; the first material layer, the second material layer and the third material layer form a laminated structure; the pattern layer is formed by chemical etching on the laminated structure according to a preset LOGO pattern; the first material layer and the third material layer are made of Cr, and the second material layer is made of Al2O3; by controlling the thickness of each material layer, the laminated structure presents different colors under illumination. The LOGO pattern prepared by the scheme shows an expected color with metallic luster under illumination, the problems that a colored LOGO prepared by a traditional mode lacks metallic luster and is easy to fade are solved, and the scheme is low in cost and easy for mass production.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic products, in particular to a mobile phone back panel. Background Art

[0002] Currently, mobile phone back panels on the market often feature product logos. These logos can be in the form of graphics, text, or a combination of graphics and text. They are typically printed or filled with colored inks to achieve various color effects. However, in actual use, colored inks lack a metallic luster and are prone to fading, which affects the product's appearance. Therefore, a new technical solution is urgently needed to address these existing issues and improve product durability and aesthetics. Utility Model Content

[0003] In view of the above problems in the prior art, the utility model provides a mobile phone back panel to solve the problem that the colored ink of the product LOGO on the mobile phone back panel in the prior art lacks metallic luster and is easy to fade.

[0004] The mobile phone back panel provided by the utility model comprises a base layer and a pattern layer electroplated on one surface of the base layer;

[0005] A first material layer, a second material layer, and a third material layer are electroplated in sequence on one surface of the base layer in a direction away from the base layer; the first material layer, the second material layer, and the third material layer form a stacked structure;

[0006] The pattern layer is formed on the laminated structure by chemical etching according to a preset LOGO pattern;

[0007] The materials of the first material layer and the third material layer are both Cr, and the material of the second material layer is Al2O3; by controlling the thickness of the first material layer, the second material layer, and the third material layer, the laminated structure exhibits different colors under light; the base layer is an ultra-thin brittle material with a thickness of less than 1 mm; the total thickness of the laminated structure is less than 200 nm.

[0008] Preferably, the base layer is made of glass.

[0009] Preferably, the base layer is made of ceramic.

[0010] Preferably, the preset LOGO pattern is a graphic.

[0011] Preferably, the preset LOGO pattern is text.

[0012] Preferably, the preset LOGO pattern is a combination of graphics and text.

[0013] The present invention has the following beneficial effects: the mobile phone back panel provided by the present invention comprises a base layer and a pattern layer electroplated on one surface of the base layer; the base layer is electroplated with a first material layer, a second material layer, and a third material layer in a direction away from the base layer; the first material layer, the second material layer, and the third material layer form a laminated structure; the pattern layer is formed on the laminated structure by chemical etching according to a preset logo pattern; the first material layer and the third material layer are both made of Cr, and the second material layer is made of Al2O3; by controlling the thickness of the first material layer, the second material layer, and the third material layer, the laminated structure exhibits different colors under light; the base layer is an ultra-thin brittle material with a thickness of less than 1 mm; and the total thickness of the laminated structure is less than 200 nm. The solution of the present invention achieves different color effects by controlling the thickness of each electroplated layer, and then produces the logo pattern by chemical etching. The logo pattern produced by the present invention exhibits the expected color under light and has a good metallic luster, solving the problem that color logos produced by traditional methods lack metallic luster and are easy to fade. Moreover, the present invention is low-cost and easy to mass-produce. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of a mobile phone back panel provided by an embodiment of the utility model.

[0015] Figure 2 This is a comparison chart of the Lab values ​​of the laminated structures of Example 1 and Example 2 of the present invention.

[0016] Figure 3 This is a comparison chart of the ring-to-ring strength test results of the mobile phone back panels of Example 1 and Example 2 of the present utility model.

[0017] Figure 4 This is a comparison chart of the ball drop test results on the mobile phone back panels of Example 1 and Example 2 of the present utility model.

[0018] In the attached figure:

[0019] 10. Base layer; 20. Laminated structure; 21. First material layer; 22. Second material layer; 23. Third material layer. DETAILED DESCRIPTION

[0020] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a mobile phone back panel, which includes a base layer 10 and a pattern layer electroplated on one surface of the base layer 10;

[0022] A first material layer 21, a second material layer 22, and a third material layer 23 are electroplated in sequence on one surface of the base layer 10 in a direction away from the base layer 10; the first material layer 21, the second material layer 22, and the third material layer 23 constitute a laminated structure 20;

[0023] The pattern layer is formed by chemical etching on the laminated structure 20 according to a preset LOGO pattern;

[0024] The materials of the first material layer 21 and the third material layer 23 are both Cr, and the material of the second material layer 22 is Al2O3; by controlling the thickness of the first material layer 21, the second material layer 22, and the third material layer 23, the laminated structure 20 exhibits different colors under light; the base layer 10 is an ultra-thin brittle material with a thickness of less than 1 mm; the total thickness of the laminated structure 20 is less than 200 nm.

[0025] Due to factors such as the overall weight of the product and signal transmission performance, the base layer of the back panel of a mobile phone usually uses an ultra-thin brittle material, and the thickness of the ultra-thin brittle material is usually less than 1 mm. In some embodiments of the present invention, the material of the base layer is glass. Using ultra-thin glass as the base layer of the back panel of a mobile phone has the characteristics of light weight, high strength, good touch, good signal transmission performance, beautiful appearance, easy processing, environmental protection, good durability, waterproof, and low cost. In other embodiments of the present invention, the material of the base layer is ceramic. Using ceramic as the base layer of the back panel of a mobile phone has the characteristics of high strength, good wear resistance, good signal transmission performance, beautiful appearance, good durability, light weight, waterproof, good thermal conductivity, easy processing, chemical corrosion resistance, good acoustic performance, and enhanced brand image of the mobile phone.

[0026] If the laminated structure is too thick, it will affect the strength of the base layer 20, and in the subsequent chemical etching process, the side etching will be severe and the pattern will shrink. In order not to affect the strength of the base layer 20, ensure the effect of chemical etching and machinability, in the embodiment of the present invention, the laminated structure is a 3-layer structure, and the total thickness of the laminated structure 20 is less than 200nm.

[0027] In the embodiment of the present invention, the materials of the first material layer 21 and the third material layer 23 are both Cr, and the material of the second material layer 22 is Al2O3. By controlling the thickness of the first material layer 21, the second material layer 22, and the third material layer 23, the laminated structure 20 can be made to present different colors under light, such as the gold, black, blue, and gray commonly used in the LOGO pattern on the back panel of a mobile phone. The incident light is incident from the upper surface of the third material layer 23, part of the light is reflected on the upper surface of the third material layer 23, and part of the light is transmitted into the second material layer 22 and reaches the contact surface between the second material layer 22 and the first material layer 21. Part of the light is emitted from the upper surface of the first material layer 21, and part of the light is transmitted from the upper surface of the first material layer 21. The reflected light on the upper surface of the third material layer 23 interferes with the reflected light on the upper surface of the first material layer 21. By controlling the optical path difference between these two reflected light rays, the color of the laminated structure 20 can be controlled. In actual implementation, the thickness and material of each material layer are first set in professional rendering software or optical simulation software. After simulating the expected color, the corresponding thickness value of each material layer is then applied to actual production.

[0028] Because the LOGO pattern needs to be formed by chemical etching later, and the chemical etching technology of Cr is more mature and less expensive, in the embodiment of the present invention, the material of the first material layer 21 and the third material layer 23 is Cr. In other embodiments of the present invention, the material of the first material layer 21 and the third material layer 23 is Al or Cu.

[0029] In some embodiments of the present invention, the preset logo pattern is a graphic. In other embodiments of the present invention, the preset logo pattern is text. In still other embodiments of the present invention, the preset logo pattern is a combination of graphics and text. Currently, most mobile phone brands on the market have text logos on their back panels. With the solution of the present invention, a graphic logo, text logo, or a combination of graphics and text can be created on the back panel of the mobile phone in a variety of desired colors, enhancing visual impact and brand influence.

[0030] In an embodiment of the present invention, the first material layer, the second material layer, and the third material layer are electroplated by evaporation or sputtering.

[0031] The following two specific embodiments are used to illustrate the manufacturing process and color effects of the mobile phone back panel of the present invention.

[0032] The manufacturing process of the mobile phone back panel of this embodiment is as follows:

[0033] (1) Prepare a glass substrate and load it into a sputtering machine.

[0034] (2) Load the sputtering agent into the sputtering machine, set the program, control the thickness of the first material layer, the second material layer, and the third material layer through the crystal oscillator, and start the sputtering operation.

[0035] (3) The glass substrate is taken out of the furnace and the Lab color value of the laminated structure is measured.

[0036] In Example 1 and Example 2, the thickness of each material layer and the color value of the laminated structure are shown in Table 1 below. Figure 2 Shown is a comparison chart of the Lab values ​​of the laminated structures of Example 1 and Example 2.

[0037] Table 1 Parameter comparison between Example 1 and Example 2

[0038]

[0039] (4) Applying a LOGO pattern on the upper surface of the third material layer and performing de-plating using a de-plating solution. Specifically, the LOGO pattern can be applied using ink by methods such as silk screen printing, pad printing, and spraying.

[0040] Both Example 1 and Example 2 were stripped for 1 minute, and the stripping was successful, showing the LOGO pattern without obvious side corrosion.

[0041] (5) Perform a bending strength test on the glass substrate with the LOGO pattern etched on it.

[0042] The ring-to-ring strength test and ball drop test were carried out on Example 1 and Example 2. The test results are as follows: Figure 3 、 Figure 4 As shown, the test results of the two embodiments both meet the standards, and the glass substrate and the LOGO pattern are not damaged after the test.

[0043] In the above embodiment, the expected metallic luster color is achieved by controlling the thickness of the first material layer 21, the second material layer 22, and the third material layer 23, and the LOGO pattern has no obvious side erosion and the glass substrate strength meets the standard.

[0044] The present invention has the following beneficial effects: the mobile phone back panel provided by the present invention comprises a base layer and a pattern layer electroplated on one surface of the base layer; the base layer is electroplated with a first material layer, a second material layer, and a third material layer in a direction away from the base layer; the first material layer, the second material layer, and the third material layer form a laminated structure; the pattern layer is formed on the laminated structure by chemical etching according to a preset logo pattern; the first material layer and the third material layer are both made of Cr, and the second material layer is made of Al2O3; by controlling the thickness of the first material layer, the second material layer, and the third material layer, the laminated structure exhibits different colors under light; the base layer is an ultra-thin brittle material with a thickness of less than 1 mm; and the total thickness of the laminated structure is less than 200 nm. The solution of the present invention achieves different color effects by controlling the thickness of each electroplated layer, and then produces the logo pattern by chemical etching. The logo pattern produced by the present invention exhibits the expected color under light and has a good metallic luster, solving the problem that color logos produced by traditional methods lack metallic luster and are easy to fade. Moreover, the present invention is low-cost and easy to mass-produce.

[0045] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms of deformation without departing from the scope of protection of the purpose of the present invention and the claims, which are all within the protection of the present invention.

Claims

1. A mobile phone back panel, characterized in that: The mobile phone back panel comprises a base layer (10) and a pattern layer electroplated on one surface of the base layer (10); A first material layer (21), a second material layer (22), and a third material layer (23) are electroplated in sequence on one surface of the base layer (10) in a direction away from the base layer (10); the first material layer (21), the second material layer (22), and the third material layer (23) constitute a laminated structure (20); The pattern layer is formed on the laminated structure (20) by chemical etching according to a preset LOGO pattern; The materials of the first material layer (21) and the third material layer (23) are both Cr, and the material of the second material layer (22) is Al2O3; by controlling the thickness of the first material layer (21), the second material layer (22), and the third material layer (23), the laminated structure (20) exhibits different colors under light; the base layer (10) is an ultra-thin brittle material with a thickness of less than 1 mm; and the total thickness of the laminated structure (20) is less than 200 nm.

2. The mobile phone back panel according to claim 1, characterized in that: The base layer (10) is made of glass.

3. The mobile phone back panel according to claim 1, characterized in that: The base layer (10) is made of ceramic.

4. The mobile phone back panel according to claim 1, characterized in that: The preset LOGO pattern is a graphic.

5. The mobile phone back panel according to claim 1, characterized in that: The preset LOGO pattern is text.

6. The mobile phone back panel according to claim 1, characterized in that: The preset LOGO pattern is a combination of graphics and text.

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