A coated cover plate and electronic device comprising the same

Abstract

This utility model relates to a coated cover plate and an electronic device including the same. The cover plate includes: a glass substrate, which includes a first substrate and a second substrate, with a solid optical adhesive between the first substrate and the second substrate to connect them; a semi-transparent silver chromium layer is also disposed between the second substrate and the solid optical adhesive, and a serpentine groove is provided on the other side of the second substrate away from the silver chromium layer; a composite coating layer formed on the front side of the glass substrate, which sequentially includes: a chromium carbide transition layer in direct contact with the glass substrate; a potassium oxide intermediate layer; a nickel-aluminum surface layer; and a back functional layer group formed on the edge region of the back side of the glass substrate, which includes: a photosensitive color-changing ink layer; and an aluminum nitride protective layer. The materials of each layer of this cover plate complement each other, which not only greatly improves the physical properties and chemical stability of the cover plate, but also gives it unique visual characteristics, bringing a brand-new user experience to electronic products.

Description

Technical Field

[0001] This utility model relates to the field of cover plate technology, and more specifically, to a coated cover plate and an electronic device containing the same. Background Technology

[0002] With the increasing popularity of consumer electronics and consumers' high demands for product durability, aesthetics, and functionality, traditional glass covers are no longer sufficient to meet market needs in terms of hardness, abrasion resistance, chemical stability, and special visual effects. Therefore, developing a novel layered structure for the cover coating is particularly important. Utility Model Content

[0003] The purpose of this invention is to provide a coated cover plate and an electronic device containing the same, with the aim of improving the performance of the cover plate.

[0004] Specifically, the technical solution of this utility model is as follows: a coated cover plate is proposed, comprising: a glass substrate, the glass substrate including a first substrate and a second substrate, a solid optical adhesive is disposed between the first substrate and the second substrate to connect the first substrate and the second substrate; wherein, a semi-transparent silver chromium layer is disposed between the second substrate and the solid optical adhesive, and a serpentine groove is provided on the other side of the second substrate away from the silver chromium layer. The composite coating layer formed on the front side of the glass substrate comprises, in sequence: The chromium carbide transition layer in direct contact with the glass substrate has a thickness of 20-50 nm and a Vickers hardness of ≥2800 HV. The potassium oxide intermediate layer has a thickness of 10-20 nm and an oxygen-potassium atomic ratio of 1.5-2.2:1. The surface layer of nickel-aluminum alloy has a thickness of 5-15 nm, and the Ni3Al grain size is controlled at 5-20 nm. The back functional layer group formed on the edge region of the back side of the glass substrate includes: The photosensitive color-changing ink layer, with a thickness of 8-12μm, contains spiropyran-based photochromic materials; The aluminum nitride protective layer is 3-5 μm thick and has a columnar crystal structure with a grain aspect ratio ≥5:1. Among them, the surface roughness Ra of the front composite coating layer is ≤0.8nm, and the hardness is ≥9H.

[0005] As a preferred technical solution, the chromium carbide transition layer has a gradient structure, with the carbon content near the glass substrate side being 5-15 at% higher than that on the surface side. The potassium oxide intermediate layer is doped with rare earth elements, selected from at least one of Y, La, and Ce; the nickel-aluminum surface layer contains nanodiamond particles with a particle size distribution of 3-8 nm.

[0006] As a preferred technical solution, the color-changing response time of the photosensitive color-changing ink layer is ≤3 seconds, and it can achieve switching between at least two color states under ultraviolet light irradiation; The aluminum nitride protective layer has a light transmittance of ≥85% in the visible light band and a micron-level uneven structure on its surface with a height difference of 0.5-2μm.

[0007] As a preferred technical solution, a transition layer is provided between the back functional layer group and the glass substrate. The transition layer contains alternating stacked SiO2 and Al2O3 sublayers, each sublayer having a thickness of 10-30nm and a total thickness of 80-150nm.

[0008] As a preferred technical solution, the chromium carbide transition layer is prepared by magnetron sputtering, the potassium oxide intermediate layer is formed by atomic layer deposition, and the nickel-aluminum surface layer is prepared by ion beam assisted deposition.

[0009] As a preferred technical solution, the glass substrate is chemically strengthened glass with a surface compressive stress ≥600MPa and a compressive stress layer depth ≥30μm; An interface strengthening layer is provided between the front composite coating layer and the glass substrate. This interface strengthening layer includes: First sublayer: a 2-5 nm thick titanium metal layer; Second sublayer: TiN layer with a thickness of 3-8 nm; The third sublayer is an amorphous carbon layer with a thickness of 5-10 nm.

[0010] As a preferred technical solution, the photosensitive color-changing ink layer comprises: Matrix resin: selected from at least one of polyurethane acrylate and epoxy acrylate; Photochromic materials: Combinations of spiropyran compounds and diarylethylene compounds; Nanofillers: SiO2 or TiO2 core-shell particles with a particle size of 20-50 nm; Leveling agent: Organosilicon leveling agent.

[0011] As a preferred technical solution, the surface of the aluminum nitride protective layer is treated with plasma, and the treatment gas is a CF4 / O2 mixture.

[0012] As a preferred technical solution, the thickness of the glass substrate is 0.3-1.2mm, and the visible light transmittance is ≥90%.

[0013] On the other hand, an electronic device is also proposed, including the coated cover plate as described above, and the smart terminal device includes smartphones, tablets, and wearable devices.

[0014] The beneficial effects of this utility model are as follows: This technical solution is based on the latest research results in materials science, and achieves a perfect combination of multi-layer materials through a precise coating process. The front coating layer adopts a three-layer structure of chromium carbide, potassium oxide, and nickel-aluminum alloy, which are sequentially stacked on the glass substrate. Each layer of material performs its own function, together forming an indestructible protective barrier. The chromium carbide transition layer, with its excellent hardness and wear resistance, effectively resists external scratches and wear; the potassium oxide intermediate layer, with its good chemical stability and hardness, further enhances the corrosion resistance and protective performance of the cover plate; the nickel-aluminum alloy surface layer, with its high hardness, wear resistance, and oxidation resistance, provides additional protection for the cover plate and maintains the surface smoothness.

[0015] The back bezel area innovatively incorporates a photosensitive color-changing ink layer and an aluminum nitride protective layer. The former gives the cover a unique visual effect, while the latter protects the ink layer from scratches with its high hardness and wear resistance, ensuring the durability of the visual effect.

[0016] A second substrate with a thermally conductive serpentine decorative layer serves both thermal conductivity and heat dissipation purposes. A 50-nanometer semi-transparent silver chrome layer is then deposited on top of this, making it subtly visible and adding a decorative element. Finally, solid optical adhesive is used to fully bond it to the original first substrate, achieving both thermal conductivity and decorative effects, making it suitable for decorative cover plates.

[0017] The overall structural design is scientific and reasonable, with each layer of materials complementing each other. This not only greatly improves the physical properties and chemical stability of the cover plate, but also gives it unique visual characteristics, bringing a brand-new user experience to electronic products. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the stacking structure of a coated cover plate according to an embodiment of the present utility model; Figure 2 Another schematic diagram of a stacked structure of a coated cover plate according to an embodiment of this utility model; Figure 3 This is a schematic diagram of the front structure of a coated cover plate according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the front structure of the second substrate proposed in an embodiment of the present invention; Figure 5This is a schematic diagram of the back structure of the second substrate proposed in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures: First substrate 1; Composite coating layer 2; Chromium carbide transition layer 21; Potassium oxide intermediate layer 22; Nickel-aluminum surface layer 23; Photosensitive color-changing ink layer 3; Aluminum nitride protective layer 4; Transition layer 5; Interface strengthening layer 6; Silver chromium layer 7; Serpentine groove 8; Second substrate 9; Solid optical adhesive 10; Phase change material 11. Detailed Implementation

[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0022] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0023] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0024] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0025] It should be noted that "multiple" as mentioned in this article refers to two or more. Example

[0026] like Figure 1-3 As shown, a coated cover plate proposed in this embodiment includes: a glass substrate, the glass substrate including a first substrate 1 and a second substrate 9, a solid optical adhesive 10 is disposed between the first substrate 1 and the second substrate 9 to connect the first substrate 1 and the second substrate 9.

[0027] Among them, such as Figure 4-5 As shown, a semi-transparent silver chromium layer 7 is also disposed between the second substrate 9 and the solid optical adhesive 10, and a serpentine groove 8 is provided on the other side of the second substrate 9 away from the silver chromium layer 7. The serpentine groove 8 can serve as a heat dissipation and heat conduction function. Furthermore, a phase change material 11 can be added into the groove, which can have the effect of decorative glass.

[0028] The composite coating layer 2 formed on the front side of the glass substrate comprises, in sequence: The chromium carbide transition layer 521, which is in direct contact with the glass substrate, has a thickness of 20-50 nm and a Vickers hardness ≥2800 HV. The potassium oxide intermediate layer 22 has a thickness of 10-20 nm and an oxygen-potassium atomic ratio of 1.5-2.2:1. The surface layer of nickel-aluminum alloy is 23, with a thickness of 5-15nm, and the grain size of Ni3Al is controlled at 5-20nm. The back functional layer group formed on the edge region of the back side of the glass substrate includes: Photochromic ink layer 3, with a thickness of 8-12μm, contains spiropyran-based photochromic materials; The aluminum nitride protective layer 4 has a thickness of 3-5 μm and a columnar crystal structure with a grain aspect ratio ≥5:1. Among them, the surface roughness Ra of the front composite coating layer 2 is ≤0.8nm, and the hardness is ≥9H.

[0029] Preferably, the chromium carbide transition layer has a gradient structure, with the carbon content near the glass substrate side being 5-15 at% higher than that on the surface side. The potassium oxide intermediate layer is doped with rare earth elements, selected from at least one of Y, La, and Ce; the nickel-aluminum surface layer contains nanodiamond particles with a particle size distribution of 3-8 nm.

[0030] Preferably, the color-changing response time of the photosensitive color-changing ink layer 3 is ≤3 seconds, and it can switch between at least two color states under ultraviolet light irradiation; The aluminum nitride protective layer 4 has a light transmittance of ≥85% in the visible light band and a micron-level uneven structure on its surface with a height difference of 0.5-2μm.

[0031] Preferably, a transition layer 5 is provided between the back functional layer group and the glass substrate. The transition layer 5 includes alternating stacked SiO2 and Al2O3 sublayers, each sublayer having a thickness of 10-30 nm and a total thickness of 80-150 nm.

[0032] Preferably, the chromium carbide transition layer is prepared by magnetron sputtering, the potassium oxide intermediate layer is formed by atomic layer deposition, and the nickel-aluminum surface layer is prepared by ion beam assisted deposition.

[0033] Preferably, the glass substrate is chemically strengthened glass with a surface compressive stress ≥600MPa and a compressive stress layer depth ≥30μm; Furthermore, such as Figure 2 As shown, an interface strengthening layer 6 is provided between the front composite coating layer 2 and the glass substrate. The interface strengthening layer 6 includes: First sublayer: a 2-5 nm thick titanium metal layer; Second sublayer: TiN layer with a thickness of 3-8 nm; The third sublayer is an amorphous carbon layer with a thickness of 5-10 nm.

[0034] As a preferred technical solution, the photosensitive color-changing ink layer 3 comprises: Matrix resin: selected from at least one of polyurethane acrylate and epoxy acrylate; Photochromic materials: Combinations of spiropyran compounds and diarylethylene compounds; Nanofillers: SiO2 or TiO2 core-shell particles with a particle size of 20-50 nm; Leveling agent: Organosilicon leveling agent.

[0035] Preferably, the surface of the aluminum nitride protective layer is treated with plasma, and the treatment gas is a CF4 / O2 mixture.

[0036] Preferably, the thickness of the glass substrate is 0.3-1.2 mm, and the visible light transmittance is ≥90%.

[0037] On the other hand, an electronic device is also proposed, including the coated cover plate as described above, and the smart terminal device includes smartphones, tablets, and wearable devices.

[0038] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A coated cover sheet, characterized by, include: A glass substrate, comprising a first substrate and a second substrate, wherein a solid optical adhesive is disposed between the first substrate and the second substrate to connect the first substrate and the second substrate; wherein a semi-transparent silver chromium layer is further disposed between the second substrate and the solid optical adhesive, and a serpentine groove is provided on the other side of the second substrate away from the silver chromium layer. The composite coating layer formed on the front side of the glass substrate comprises, in sequence: The chromium carbide transition layer in direct contact with the glass substrate has a thickness of 20-50 nm and a Vickers hardness of ≥2800 HV. The potassium oxide intermediate layer has a thickness of 10-20 nm and an oxygen-potassium atomic ratio of 1.5-2.2:

1. The surface layer of nickel-aluminum alloy has a thickness of 5-15 nm, and the Ni3Al grain size is controlled at 5-20 nm. The back-side functional layer group formed on the edge region of the back side of the glass substrate includes: The photosensitive color-changing ink layer, with a thickness of 8-12μm, contains spiropyran-based photochromic materials; The aluminum nitride protective layer is 3-5 μm thick and has a columnar crystal structure with a grain aspect ratio ≥5:

1. The surface roughness Ra of the front composite coating layer is ≤0.8nm, and the hardness is ≥9H.

2. The coated cover plate according to claim 1, characterized in that, The color-changing response time of the photosensitive color-changing ink layer is ≤3 seconds, and it can switch between at least two color states under ultraviolet light irradiation; The aluminum nitride protective layer has a light transmittance of ≥85% in the visible light band and a micron-level uneven structure on its surface with a height difference of 0.5-2μm.

3. The coated cover plate of claim 2, wherein, A transition layer is provided between the back functional layer group and the glass substrate. The transition layer contains alternating stacked SiO2 and Al2O3 sublayers, each sublayer having a thickness of 10-30 nm and a total thickness of 80-150 nm.

4. A coated cover plate according to claim 1, characterized in that, The glass substrate is chemically strengthened glass with a surface compressive stress ≥600MPa and a compressive stress layer depth ≥30μm. An interface strengthening layer is provided between the front composite coating layer and the glass substrate. This interface strengthening layer includes: First sublayer: a 2-5 nm thick titanium metal layer; Second sublayer: TiN layer with a thickness of 3-8 nm; The third sublayer is an amorphous carbon layer with a thickness of 5-10 nm.

5. The coated cover plate of any one of claims 1-4, wherein, The glass substrate has a thickness of 0.3-1.2 mm and a visible light transmittance of ≥90%.

6. An electronic device, comprising: The electronic device includes the coated cover plate as described in any one of claims 1-5, and includes smartphones, tablets, and wearable devices.

Images