Cover plate with composite coating structure

Abstract

The utility model relates to a cover plate with a composite coating structure, which comprises a glass substrate serving as a support foundation of an integral structure; the coating layer group is arranged on the front surface of the glass substrate and sequentially comprises a Cu-Zr alloy layer, a Cu-Cr-Zr alloy layer and a copper-nickel alloy layer from inside to outside; the ink layer is arranged in a frame area on the back of the glass substrate, and the copper-silver alloy layer is located below the ink layer. And the total thickness of each layer of the coating layer group and the copper-silver alloy layer does not exceed 200nm. According to the technical scheme, the hardness and wear resistance of the glass surface are improved; the hardness and the corrosion resistance are further enhanced through the Cu-Cr-Zr alloy layer; and the copper-nickel alloy layer is used as the outermost layer, so that external scratch and corrosion are effectively resisted, and the inner-layer coating film is protected. Meanwhile, due to the application of the photochromic ink layer, the cover plate can show rich color changes according to the change of light or temperature, and the interestingness and attractiveness of the product are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cover plate, specifically, relate to a kind of cover plate with composite plating structure. BACKGROUND

[0002] With the popularity and function upgrade of consumer electronics, the requirements for cover plate materials are increasingly stringent. Although traditional glass cover plate has basic optical transparency and structural strength, it has deficiencies in hardness, wear resistance, corrosion resistance and aesthetics. In particular in the field of high-end intelligent devices, users expect the cover plate to resist scratches and wear during daily use and have unique aesthetic effects. Therefore, it is particularly important to develop a cover plate plating layer technology that integrates high strength, high wear resistance, corrosion resistance and aesthetics. SUMMARY

[0003] The utility model discloses a kind of cover plate with composite plating structure, which can integrate high strength, high wear resistance, corrosion resistance and aesthetics.

[0004] Specifically, the utility model discloses the following technical scheme: a kind of cover plate with composite plating structure, comprising: glass substrate, as the support basis of overall structure;Plating layer group is arranged on the front of glass substrate, and plating layer group includes Cu-Zr alloy layer, Cu-Cr-Zr alloy layer and copper-nickel alloy layer from inside to outside in sequence;Ink layer is arranged in the frame area of the back of glass substrate, and copper-silver alloy layer is located below ink layer;The thickness sum of each layer of plating layer group and copper-silver alloy layer is not more than 200nm.

[0005] As a preferred technical scheme, the thickness of Cu-Zr alloy layer is 20-30nm, and the Vickers hardness of Cu-Zr alloy layer is ≥650HV, and the visible light band transmittance is ≥85%.

[0006] As a preferred technical scheme, the thickness of Cu-Cr-Zr alloy layer is 30-50nm, and the salt mist corrosion resistance time of Cu-Cr-Zr alloy layer is ≥120h.

[0007] As a preferred technical scheme, the thickness of copper-nickel alloy layer is 50-80nm, and the surface roughness Ra of copper-nickel alloy layer is ≤0.15 μm.

[0008] As a preferred technical scheme, each layer in plating layer group is prepared by magnetron sputtering process, and sputtering gas pressure is controlled at 0.3-0.8Pa;Gradient transition structure is formed at the interface of Cu-Zr alloy layer and Cu-Cr-Zr alloy layer, and the width of transition zone is 5-8nm.

[0009] Preferably, the ink layer is made of photosensitive color-changing ink, and the thickness of the ink layer is 10-12 microns; the photosensitive color-changing ink has a wavelength response range of 300-450 nm, and the color change response time is less than or equal to 3 seconds.

[0010] Preferably, a transition layer is arranged between the ink layer and the copper-silver alloy layer, and the transition layer is a composite layer of SiO2 and Cu-Ag nanoparticles; the thickness of the transition layer is 5-8 nm, the particle size of the Cu-Ag nanoparticles is 10-30 nm, and the volume fraction of the Cu-Ag nanoparticles is 15-25%.

[0011] Preferably, the thickness of the copper-silver alloy layer is 20-50 nm, and the surface resistivity of the copper-silver alloy layer is less than or equal to 0.5 ohm*cm.

[0012] Preferably, the total thickness of the film layer group is 100-160 nm, and the average light transmittance in the wavelength range of 380-780 nm is greater than or equal to 90%; a hydrophobic coating layer is further arranged on the outer surface of the copper-nickel alloy layer, the contact angle of the hydrophobic coating layer is greater than or equal to 110 degrees, and the thickness of the hydrophobic coating layer is 2-5 nm.

[0013] Preferably, the glass substrate is made of chemically strengthened soda-lime glass, and the thickness of the glass substrate is 0.5-1.2 mm; a anti-reflection layer is arranged between the film layer group and the glass substrate, and the anti-reflection layer has an alternating layer structure of SiO2 / TiO2, the total thickness of the anti-reflection layer is 80-120 nm, and the refractive index gradient is 1.46-2.35.

[0014] The cover plate film layer technology provided by the utility model has the advantages that based on the latest research results of material science, through a precise film plating process, high-performance materials such as copper-zirconium alloy, copper-chromium-zirconium alloy, copper-nickel alloy and copper-silver alloy are sequentially plated on a glass substrate to form a film layer with excellent comprehensive performance. The Cu-Zr alloy layer as the bottom layer improves the hardness and wear resistance of the glass surface; the Cu-Cr-Zr alloy layer further enhances the hardness and corrosion resistance; the copper-nickel alloy layer as the outermost layer effectively resists scratches and corrosion from the outside and protects the inner film. Meanwhile, the application of the photosensitive color-changing ink layer enables the cover plate to exhibit rich color changes according to changes in light or temperature, increasing the interestingness and aesthetic appearance of the product. The copper-silver alloy layer serves as a protective barrier for the ink layer, preventing it from being scratched and endowing the cover plate with additional conductivity, thermal conductivity and antibacterial properties. This layered structure design not only solves the performance shortcomings of traditional cover plate materials, but also realizes the multifunctionalization of the cover plate through the innovative application of materials, providing a more high-quality cover plate solution for high-end intelligent devices. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0016] Figure 1 Structure diagram of the cover plate with the composite coating structure Figure 1 ;

[0017] Figure 2 Structure diagram of the cover plate with the composite coating structure Figure 2 .

[0018] Legend: glass substrate 1; Cu-Zr alloy layer 21; Cu-Cr-Zr alloy layer 22; copper-nickel alloy layer 23; ink layer 31; copper-silver alloy layer 32; transition layer 4; anti-reflection layer 5. DETAILED DESCRIPTION

[0019] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the inventive aspects of the example implementations to those skilled in the art. Like reference numerals may refer to like elements throughout the description of the figures.

[0020] Moreover, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, devices, implementations, and operations have not been shown or described in detail to avoid obscuring aspects of the application.

[0021] The block diagrams shown in the drawings are only functional entities, and do not necessarily have to correspond to physically independent entities. That is, these functional entities can be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0022] The flow chart shown in the drawing is only an exemplary illustration, not necessarily including all the contents and operations / steps, and not necessarily executed in the order as described. For example, some operations / steps can be further decomposed, and some operations / steps can be combined or partially combined, so the actual execution order can be changed according to the actual situation.

[0023] It should be noted that "a plurality of" herein refers to two or more.

[0024] Examples

[0025] As Figures 1-2 shown, a cover plate with a composite coating structure proposed in the embodiment includes: a glass substrate 1 as the support basis of the overall structure; a coating layer group provided on the front surface of the glass substrate 1, which comprises, from inside to outside, a Cu-Zr alloy layer 21, a Cu-Cr-Zr alloy layer 22, and a copper-nickel alloy layer 23; an ink layer 31 provided in the frame area on the back surface of the glass substrate 1, and a copper-silver alloy layer 32 located below the ink layer 31; the total thickness of each layer of the coating layer group and the copper-silver alloy layer 32 is not more than 200 nm.

[0026] The Cu-Zr alloy has excellent mechanical properties and thermal stability, which can effectively improve the hardness and wear resistance of the glass surface while maintaining high optical transparency.

[0027] The Cu-Cr-Zr alloy adds chromium element to the Cu-Zr alloy, further enhancing the hardness and corrosion resistance of the alloy, providing more comprehensive protection for the cover plate.

[0028] Preferably, the thickness of the Cu-Zr alloy layer 21 is 20-30 nm, and the Vickers hardness of the Cu-Zr alloy layer 21 is ≥650HV, and the visible light band transmittance is ≥85%.

[0029] Preferably, the thickness of the Cu-Cr-Zr alloy layer 22 is 30-50 nm, and the salt spray corrosion resistance time of the Cu-Cr-Zr alloy layer 22 is ≥120h.

[0030] Preferably, the thickness of the copper-nickel alloy layer 23 is 50-80 nm, and the surface roughness Ra of the copper-nickel alloy layer 23 is ≤0.15μm. Copper-nickel alloy is known for its high hardness, high wear resistance and good corrosion resistance, as the outermost layer, it can effectively resist external scratching and corrosion, and protect the inner coating from damage.

[0031] Preferably, each layer in the coating layer group is prepared by a magnetron sputtering process, and the sputtering gas pressure is controlled at 0.3-0.8Pa; a gradient transition structure is formed at the interface between the Cu-Zr alloy layer 21 and the Cu-Cr-Zr alloy layer 22, and the width of the transition zone is 5-8nm.

[0032] Preferably, the ink layer 31 adopts a photosensitive color-changing ink, and the thickness thereof is 10-12 μm; the photosensitive color-changing ink has a wavelength response range of 300-450 nm, and the color change response time is ≤3 seconds. Further preferably, a transition layer 4 is arranged between the ink layer 31 and the copper-silver alloy layer 32, and the transition layer 4 is a composite layer of SiO2 and Cu-Ag nanoparticles; the thickness of the transition layer 4 is 5-8 nm, the particle size of the Cu-Ag nanoparticles is 10-30 nm, and the volume ratio is 15-25%.

[0033] The ink layer 31 changes color according to the change of light or temperature, thereby increasing the interestingness and aesthetic appearance of the product.

[0034] Preferably, the thickness of the copper-silver alloy layer 32 is 20-50 nm, and the surface resistivity of the copper-silver alloy layer 32 is ≤0.5 Ω·cm. The main function of the copper-silver alloy layer 32 is to prevent the ink layer 31 from being scratched, and meanwhile, the copper-silver alloy layer 32 provides additional added value for the cover plate by virtue of its good electrical conductivity, thermal conductivity and antibacterial performance.

[0035] Further, the total thickness of the film-coated layer group is 100-160 nm, and the average light transmittance in the 380-780 nm wavelength range is ≥90%; the outer surface of the copper-nickel alloy layer 23 is further provided with a hydrophobic coating layer, and the contact angle of the hydrophobic coating layer is ≥110°, and the thickness thereof is 2-5 nm.

[0036] Preferably, the glass substrate 1 adopts chemically strengthened soda-lime glass, and the thickness thereof is 0.5-1.2 mm; a transparent layer 5 is arranged between the film-coated layer group and the glass substrate 1, and the transparent layer 5 has an SiO2 / TiO2 alternating layer structure, the total thickness thereof is 80-120 nm, and the refractive index gradient is 1.46-2.35.

[0037] The above detailed description is further used to explain the purpose, technical scheme and beneficial effects of the present application, and it should be understood that the above description is only a specific embodiment of the present application, and is not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cover plate with a composite coating structure, characterized in that, include: The glass substrate serves as the supporting foundation for the overall structure. A coating layer group is disposed on the front side of the glass substrate, the coating layer group comprising, from the inside out, a Cu-Zr alloy layer, a Cu-Cr-Zr alloy layer and a copper-nickel alloy layer; an ink layer disposed on the back edge region of the glass substrate, and a copper-silver alloy layer located below the ink layer; the total thickness of each layer of the coating layer group and the copper-silver alloy layer does not exceed 200 nm.

2. The cover plate with a composite coating structure according to claim 1, characterized in that, The thickness of the Cu-Zr alloy layer is 20-30 nm, the Vickers hardness of the Cu-Zr alloy layer is ≥650 HV, and the transmittance in the visible light band is ≥85%.

3. A cover plate with a composite coating structure according to claim 2, characterized in that, The thickness of the Cu-Cr-Zr alloy layer is 30-50 nm, and the salt spray corrosion resistance time of the Cu-Cr-Zr alloy layer is ≥120 h.

4. A cover plate with a composite coating structure according to claim 3, characterized in that, The thickness of the copper-nickel alloy layer is 50-80 nm, and the surface roughness Ra of the copper-nickel alloy layer is ≤0.15 μm.

5. A cover plate with a composite coating structure according to claim 1, characterized in that, Each layer in the coating layer group is prepared by magnetron sputtering, and the sputtering pressure is controlled at 0.3-0.8 Pa; a gradient transition structure is formed at the interface between the Cu-Zr alloy layer and the Cu-Cr-Zr alloy layer, and the width of the transition region is 5-8 nm.

6. A cover plate with a composite coating structure according to claim 1, characterized in that, The ink layer is made of photosensitive color-changing ink with a thickness of 10-12μm; the photosensitive color-changing ink has a response wavelength range of 300-450nm and a color change response time of ≤3 seconds.

7. A cover plate with a composite coating structure according to claim 1, characterized in that, A transition layer is provided between the ink layer and the copper-silver alloy layer. The transition layer is a composite material layer of SiO2 and Cu-Ag nanoparticles. The thickness of the transition layer is 5-8 nm, wherein the Cu-Ag nanoparticles have a particle size of 10-30 nm and a volume percentage of 15-25%.

8. A cover plate with a composite coating structure according to claim 1, characterized in that, The thickness of the copper-silver alloy layer is 20-50 nm, and the surface resistivity of the copper-silver alloy layer is ≤0.5 Ω·cm.

9. A cover plate with a composite coating structure according to any one of claims 1-8, characterized in that, The total thickness of the coating layer group is 100-160nm, and the average transmittance in the 380-780nm wavelength band is ≥90%; the outer surface of the copper-nickel alloy layer is also provided with a hydrophobic coating, the contact angle of the hydrophobic coating is ≥110°, and the thickness is 2-5nm.

10. A cover plate with a composite coating structure according to claim 9, characterized in that, The glass substrate is made of chemically strengthened soda-lime glass with a thickness of 0.5-1.2 mm. An anti-reflective layer is provided between the coating layer and the glass substrate. The anti-reflective layer is a SiO2 / TiO2 alternating layer structure with a total thickness of 80-120 nm and a refractive index gradient of 1.46-2.35.

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