Glass cover plate with multi-layer composite protection structure

Abstract

The utility model relates to a glass cover plate with a multi-layer composite protection structure. The glass cover plate comprises a glass substrate; the composite coating is positioned on the front surface of the glass substrate and sequentially comprises a chromium carbide layer, a beryllium oxide layer and a nickel-3 aluminum layer from inside to outside; the composite structure layer is positioned in a frame area on the back surface of the glass substrate and sequentially comprises a photosensitive color-changing ink layer and an aluminum nitride layer from inside to outside. The thickness of the chromium carbide layer is 20-50nm, the thickness of the beryllium oxide layer is 10-20nm, and the thickness of the nickel-3 aluminum layer is 5-15nm. The Vickers hardness of the chromium carbide layer is larger than or equal to 2500 HV, and the surface roughness Ra is smaller than or equal to 0.05 micrometer. The refractive index of the beryllium oxide layer ranges from 1.65 to 1.72, and the chemical stability meets the requirement that the beryllium oxide layer is not corroded after being soaked in a 5% NaOH solution for 24 hours According to the layered structure of the coating layer of the cover plate provided by the utility model, various high-performance materials are ingeniously fused, and a composite protective layer is formed through layer-by-layer superposition. The material of each layer has a synergistic effect, so that not only is the physical performance of the cover plate optimized, but also the cover plate is endowed with unique visual characteristics and environment-friendly adaptability, and revolutionary improvement is brought to the appearance design and user experience of electronic products.

Description

TECHNICAL FIELD

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

[0002] With the popularity of electronic equipment and the improvement of consumer demand for quality, as the key component of intelligent equipment, the durability, aesthetic and functionality of glass cover plate become the focus of the industry. The traditional glass cover plate has defects in hardness, wear resistance, chemical stability and visual attraction, which is difficult to meet the needs of high-end market. Therefore, it is particularly important to develop a cover plate coating layer layered structure integrating high strength, high wear resistance, corrosion resistance and special visual effect. SUMMARY

[0003] The utility model discloses a glass cover plate with multilayer composite protection structure, which aims to develop a high-strength, high-wear-resistant and corrosion-resistant cover plate.

[0004] Specifically, the utility model discloses the technical scheme is as follows: a glass cover plate with multilayer composite protection structure, comprising:

[0005] Glass substrate;

[0006] The composite coating layer on the front of the glass substrate is composed of a chromium carbide layer, a beryllium oxide layer and a nickel-aluminum layer from inside to outside.

[0007] The composite structure layer on the back frame area of the glass substrate is composed of a photosensitive color-changing ink layer and an aluminum nitride layer from inside to outside.

[0008] As a preferred technical scheme, the thickness of the chromium carbide layer is 20-50nm, the thickness of the beryllium oxide layer is 10-20nm, and the thickness of the nickel-aluminum layer is 5-15nm.

[0009] As a preferred technical scheme, the Vickers hardness of the chromium carbide layer is ≥2500HV, and the surface roughness Ra is ≤0.05μm.

[0010] As a preferred technical scheme, the refractive index of the beryllium oxide layer is between 1.65-1.72, and the chemical stability meets the corrosion-free requirement of 5% NaOH solution immersion for 24 hours.

[0011] As a preferred technical scheme, the nickel-aluminum layer contains 30-35wt% aluminum element grains, and the grain size is controlled within the range of 50-100nm.

[0012] As a preferred technical scheme, the total thickness of the front composite coating layer is 35-85nm, and a transition gradient layer of 2-5nm is provided between each layer.

[0013] Preferably, the photosensitive color-changing ink layer has a thickness of 8-12 microns and comprises photochromic microcapsules and an ultraviolet-cured resin matrix.

[0014] Preferably, the aluminum nitride layer has a thickness of 3-5 microns and a thermal expansion coefficient matching error of less than or equal to 15% with the ink layer.

[0015] Preferably, the boundary of the back composite structure layer maintains a safety distance of 0.1-0.3 mm from the edge of the glass substrate.

[0016] Preferably, the glass substrate is a chemically strengthened glass with a surface compressive stress of greater than or equal to 600 MPa and a depth of layer of greater than or equal to 30 microns.

[0017] The cover plate film coating layer of the present application has a layered structure that ingeniously combines multiple high-performance materials to form a composite protective layer through layer-by-layer stacking.

[0018] The front film coating layer has a three-layer structure of chromium carbide, beryllium oxide, and nickel aluminum, which utilizes the high hardness, wear resistance, and chemical stability of these materials to form an indestructible protective barrier that effectively resists scratches, wear, and chemical corrosion, significantly improving the durability of the glass cover plate.

[0019] The back frame area innovatively incorporates a photosensitive color-changing ink layer and an aluminum nitride protective layer, with the former exhibiting a multi-color effect according to changes in light to enhance the product's interest and individuality, and the latter providing reliable protection for the ink layer due to its excellent hardness and wear resistance, ensuring the durability of the visual effect.

[0020] The overall structure is designed with precision, and the synergistic effect of the various layers of materials not only optimizes the physical properties of the cover plate but also endows it with unique visual characteristics and environmental adaptability, revolutionarily improving the appearance design and user experience of electronic products. BRIEF DESCRIPTION OF DRAWINGS

[0021] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0022] Figure 1 The structure of the present application is a glass cover plate structure with a multi-layer composite protective structure.

[0023] Marked: glass substrate 1; chromium carbide layer 21; beryllium oxide layer 22; nickel aluminum layer 23; photosensitive color-changing ink layer 31; aluminum nitride layer 32. DETAILED DESCRIPTION

[0024] Example implementations are now described in greater detail with reference to the figures. Like reference numerals can be used to refer to like elements throughout. The example implementations can be implemented in numerous ways, and are not limited to the examples described herein; instead, examples are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example implementations to those skilled in the art.

[0025] Furthermore, 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

[0026] The block diagrams in the drawings show only the functionality of the examples and do not imply any particular physical or architectural arrangement of the examples. For example, functions shown as discrete blocks in the block diagrams, can be provided in one or more modules, components, or integrated circuits. Similarly, the functions shown as single functions can be implemented by one or multiple functional entities.

[0027] The flow diagrams depicted herein are examples of sequences of operations that can be performed, for example, by a computing device. The depicted examples can not be exhaustive, and additional operations can be performed, or the depicted examples can not be performed in the depicted order. For example, one or more of the operations shown and described can be omitted or combined, and additional operations can be added, in accordance with the particular implementation.

[0028] It should be noted that "a plurality" is intended to refer to two or more.

[0029] Embodiments

[0030] As Figure 1 shown in the drawings, a glass cover plate with a multi-layer composite protective structure proposed in the present embodiment comprises:

[0031] a glass substrate 1;

[0032] a composite coating layer on the front surface of the glass substrate 1, which comprises, from inside to outside, a chromium carbide layer 21, a beryllium oxide layer 22, and a nickel-aluminum layer 23;

[0033] a composite structure layer on the back surface frame area of the glass substrate 1, which comprises, from inside to outside, a photosensitive color-changing ink layer 31 and an aluminum nitride layer 32.

[0034] Preferably, the chromium carbide layer 21 has a thickness of 20-50 nm, the beryllium oxide layer 22 has a thickness of 10-20 nm, and the nickel-aluminum layer 23 has a thickness of 5-15 nm. Chromium carbide has extremely high hardness and wear resistance, which can effectively resist scratches and wear, and protect the surface of the glass cover plate. The beryllium oxide layer 22 not only has high hardness, but also has good chemical stability, which can further enhance the corrosion resistance and protection performance of the cover plate. The nickel-aluminum layer 23 provides additional protection for the cover plate with its high hardness, wear resistance and good oxidation resistance, while maintaining the smoothness of the surface.

[0035] Preferably, the chromium carbide layer 21 has a Vickers hardness ≥2500HV and a surface roughness Ra≤0.05μm.

[0036] Preferably, the beryllium oxide layer 22 has a refractive index of 1.65-1.72 and a chemical stability that meets the requirement of no corrosion after being immersed in 5% NaOH solution for 24 hours.

[0037] Preferably, the nickel-aluminum layer 23 contains 30-35wt% aluminum elements and has a grain size controlled within the range of 50-100nm.

[0038] Preferably, the total thickness of the front composite coating layer is 35-85nm, and a transition gradient layer of 2-5nm is provided between each layer.

[0039] Preferably, the photosensitive color-changing ink layer 31 has a thickness of 8-12μm and contains photochromic microcapsules and ultraviolet-curable resin matrix. It changes color according to changes in light, providing a dynamic visual effect and increasing the interest and aesthetics of the product.

[0040] Preferably, the aluminum nitride layer 32 has a thickness of 3-5μm and a thermal expansion coefficient matching error with the ink layer ≤15%. The aluminum nitride layer 32, as a protective layer for the ink layer, effectively prevents the ink from being scratched or worn, ensuring the functionality and integrity of the ink layer, with its high hardness and wear resistance.

[0041] Preferably, the boundary of the back composite structure layer maintains a safety distance of 0.1-0.3mm from the edge of the glass substrate 1.

[0042] Preferably, the glass substrate 1 is a chemically strengthened glass with a surface compressive stress ≥600MPa and a layer depth ≥30μm.

[0043] To prepare the new cover plate, the preferred implementation is as follows: a sodium-calcium glass with a thickness of 0.5mm is used as the substrate, after ultrasonic cleaning, a front protection system is formed by magnetron sputtering to deposit a 20nm chromium carbide layer 21, a 15nm beryllium oxide layer 22 and a 10nm nickel-aluminum layer 23 in sequence. In the back frame area, a 10μm photosensitive color-changing ink layer 31 is first screen printed, and then a 4μm aluminum nitride protective layer is deposited by PVD.

[0044] The whole structure is designed precisely, and the layers of materials synergistically act, which not only optimizes the physical performance of the cover plate, but also gives it unique visual characteristics and environmental adaptability, and brings revolutionary improvement for the appearance design and user experience of electronic products.

[0045] The above-described specific embodiments explain the purpose, technical solutions and beneficial effects of the present application in further detail, and it should be understood that the above-described specific embodiments are merely specific embodiments of the present application and are 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 shall be included in the protection scope of the present application.

Claims

1. A glass cover plate having a multi-layered composite protective structure, characterized by, The application relates to a glass substrate and a composite coating layer on the front surface of the glass substrate. The composite coating layer on the front surface of the glass substrate comprises, from inside to outside, a chromium carbide layer, a beryllium oxide layer and a nickel-aluminum layer. The composite structure layer on the frame area of the back surface of the glass substrate comprises, from inside to outside, a photosensitive color-changing ink layer and an aluminum nitride layer. The thickness of the chromium carbide layer is 20-50 nm, the thickness of the beryllium oxide layer is 10-20 nm, and the thickness of the nickel-aluminum layer is 5-15 nm.

2. The glass cover sheet of claim 1, wherein, The Vickers hardness of the chromium carbide layer is greater than or equal to 2500 HV, and the surface roughness Ra is less than or equal to 0.05 mu m.

3. The glass cover sheet of claim 1, wherein, The refractive index of the beryllium oxide layer is between 1.65 and 1.72, and the chemical stability satisfies the corrosion-free condition of being soaked in 5% NaOH solution for 24 hours.

4. The glass cover sheet of claim 1, wherein, The nickel-aluminum layer contains aluminum element grains, and the grain size is controlled within the range of 50-100 nm.

5. The glass cover sheet of claim 1, wherein, The total thickness of the front composite coating layer is 35-85 nm, and a transition gradient layer with a thickness of 2-5 nm is arranged between each layer.

6. The glass cover sheet of claim 1, wherein, The thickness of the photosensitive color-changing ink layer is 8-12 mu m, and the photosensitive color-changing ink layer comprises photochromic microcapsules and ultraviolet curing resin matrix.

7. The glass cover sheet of claim 1, wherein, The thickness of the aluminum nitride layer is 3-5 mu m, and the matching error of the thermal expansion coefficient with the ink layer is less than or equal to 15%.

8. The glass cover sheet of claim 7, wherein, The boundary of the back composite structure layer keeps a safety distance of 0.1-0.3 mm from the edge of the glass substrate.

9. The glass cover sheet of claim 1, wherein, The glass substrate is a chemically strengthened glass, and the surface compressive stress is greater than or equal to 600 MPa, and the layer depth is greater than or equal to 30 mu m.

10. The glass cover sheet of any of claims 1-9, wherein, ​

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