Novel multi-layer coated glass cover plate with super-strong adhesive force and surface hardness

Abstract

The utility model discloses a novel multilayer coated glass cover plate with superstrong adhesive force and surface hardness, which comprises a glass cover plate base material, a titanium oxide bottom layer is arranged at the top of the glass cover plate base material, and a first coating layer and a second coating layer are respectively arranged at the top of the titanium oxide bottom layer. The first coating layer comprises a first silicon nitride layer, a second silicon nitride layer, a third silicon nitride layer and a fourth silicon nitride layer, and the second coating layer comprises a first aluminum oxide layer, a second aluminum oxide layer, a third aluminum oxide layer and a fourth aluminum oxide layer; a multi-layer coating technology is adopted, different materials are coated on the surface of the glass cover plate base material according to a specific sequence and thickness, the scratch resistance of the glass cover plate base material can be remarkably improved, the service life of a product is prolonged, the durability of a film layer in daily use is ensured due to super-strong adhesive force, and through the optimal design of the overall film layer thickness, the service life of the product is prolonged. The glass cover plate substrate keeps high transmittance, and the use experience of the touch screen is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of coated glass cover plates, in particular to a novel multi-layer coated glass cover plate with super strong adhesion and surface hardness. Background Art

[0002] With the development of modern technology, the functional requirements for touch screen glass cover plates of electronic products such as smartphones and tablets are getting higher and higher. These devices are often subject to friction and scratches during use, so higher requirements are placed on the surface hardness and scratch resistance of the cover glass. At the same time, in order not to affect the sensitivity of the touch screen, the cover glass needs to maintain a high transmittance, which poses a challenge to the design of the film structure.

[0003] Existing coating technologies often find it difficult to simultaneously meet the requirements of high hardness, strong adhesion, and high transmittance. Therefore, developing a new film layer structure to improve the performance of cover glass has become an urgent issue to be addressed in the industry. Utility Model Content

[0004] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel multi-layer coated glass cover with super strong adhesion and surface hardness, comprising a glass cover substrate, a titanium oxide bottom layer is arranged on the top of the glass cover substrate, and a coating layer 1 and a coating layer 2 are respectively arranged on the top of the titanium oxide bottom layer; the coating layer 1 includes a silicon nitride layer 1, a silicon nitride layer 2, a silicon nitride layer 3 and a silicon nitride layer 4; the coating layer 2 includes an aluminum oxide layer 1, an aluminum oxide layer 2, an aluminum oxide layer 3 and an aluminum oxide layer 4; the silicon nitride layer 1, the silicon nitride layer 2, the silicon nitride layer 3, the silicon nitride layer 4, the aluminum oxide layer 1, the aluminum oxide layer 2, the aluminum oxide layer 3 and the aluminum oxide layer 4 are arranged at intervals on the titanium oxide bottom layer.

[0006] As a further solution of the utility model: the titanium oxide bottom layer is plated on the top of the glass cover substrate by physical vapor deposition technology, and the thickness of the titanium oxide bottom layer is 50 nanometers to 60 nanometers.

[0007] As a further solution of the utility model: the silicon nitride layer 1 is plated on the top of the titanium oxide bottom layer by magnetron sputtering technology, and the aluminum oxide layer 1 is plated on the top of the silicon nitride layer 1 by magnetron sputtering technology.

[0008] As a further solution of the utility model: the second silicon nitride layer is plated on the top of the first aluminum oxide layer by magnetron sputtering technology, and the second aluminum oxide layer is plated on the top of the second silicon nitride layer by magnetron sputtering technology.

[0009] As a further solution of the utility model: the silicon nitride layer three is plated on the top of the aluminum oxide layer two by magnetron sputtering technology, and the aluminum oxide layer three is plated on the top of the silicon nitride layer three by magnetron sputtering technology.

[0010] As a further solution of the utility model: the silicon nitride layer four is plated on the top of the silicon nitride layer four by magnetron sputtering technology, and the aluminum oxide layer four is plated on the top of the silicon nitride layer four by magnetron sputtering technology.

[0011] As a further solution of the utility model: the thickness of the aluminum oxide layer 1, the aluminum oxide layer 2, the aluminum oxide layer 3 and the aluminum oxide layer 4 is 30 nanometers to 40 nanometers.

[0012] As a further solution of the utility model: the thickness of the silicon nitride layer 1, the silicon nitride layer 2, the silicon nitride layer 3 and the silicon nitride layer 4 is 30 nanometers to 50 nanometers.

[0013] As a further solution of the utility model: a micro-protrusion is integrally formed at a position near the edge of the top of the glass cover substrate, and the micro-protrusion has the same shape as the glass cover substrate.

[0014] As a further solution of the utility model: the width and length of the coating layer 1, the coating layer 2 and the titanium oxide bottom layer are the same as the width and length of the glass cover substrate.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] In the present application, a titanium oxide base layer, a coating layer one and a coating layer two are designed, and the coating layer one and the coating layer two each include a four-layer structure, and the coating layer one and the coating layer two are spaced apart from each other. A multi-layer coating technology is used to coat different materials on the surface of the glass cover substrate in a specific order and thickness. The multi-layer nano-film structure utilizes the excellent physical properties of titanium oxide, silicon nitride and aluminum oxide, including high hardness and good optical properties. By controlling the thickness of each layer, super strong adhesion and surface hardness are achieved, while ensuring high transmittance. This design can significantly improve the scratch resistance of the glass cover substrate and extend the service life of the product. The super strong adhesion ensures the durability of the film layer in daily use. Through the optimized design of the overall film layer thickness, the glass cover substrate maintains a high transmittance without affecting the user experience of the touch screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall side view structure of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the glass cover substrate of the utility model.

[0019] The reference numerals and names in the figures are as follows:

[0020] 1. Glass cover substrate; 101. Micro protrusions; 2. Titanium oxide bottom layer; 3. Coating layer one; 301. Silicon nitride layer one; 302. Silicon nitride layer two; 303. Silicon nitride layer three; 304. Silicon nitride layer four; 4. Coating layer two; 401. Aluminum oxide layer one; 402. Aluminum oxide layer two; 403. Aluminum oxide layer three; 404. Aluminum oxide layer four. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-2 A novel multi-layer coated glass cover with super strong adhesion and surface hardness comprises a glass cover substrate 1, a titanium oxide bottom layer 2 is arranged on the top of the glass cover substrate 1, and a coating layer 1 3 and a coating layer 2 4 are arranged on the top of the titanium oxide bottom layer 2; the coating layer 1 3 comprises a silicon nitride layer 1 301, a silicon nitride layer 2 302, a silicon nitride layer 3 303 and a silicon nitride layer 4 304; the coating layer 2 4 comprises an aluminum oxide layer 1 401, an aluminum oxide layer 2 402, an aluminum oxide layer 3 403 and an aluminum oxide layer 404; the silicon nitride layer 1 301, the silicon nitride layer 2 302, the silicon nitride layer 3 303, the silicon nitride layer 4 304, the aluminum oxide layer 1 401, the aluminum oxide layer 2 402, the aluminum oxide layer 3 403 and the aluminum oxide layer 404 are arranged on the titanium oxide bottom layer 2 at intervals.

[0023] Specifically, the present application optimizes the film structure and thickness, improves the film adhesion and the scratch resistance of the glass cover substrate 1, while maintaining high transmittance to meet the specific optical parameters and physical properties requirements of the surface cover of various application products, and has broad market application prospects.

[0024] See also Figure 1 In this embodiment, the titanium oxide bottom layer 2 is plated on the top of the glass cover substrate 1 by physical vapor deposition technology, and the thickness of the titanium oxide bottom layer 2 is 50 nanometers to 60 nanometers.

[0025] Specifically, the titanium oxide bottom layer 2 as the bottom layer is thicker than other layers, and can form a uniform and dense bottom layer on the glass cover substrate 1, thereby enhancing the adhesion between subsequent film layers and the glass.

[0026] See also Figure 1In the present embodiment, silicon nitride layer 1 301 is plated on the top of titanium oxide bottom layer 2 by magnetron sputtering technology, and aluminum oxide layer 1 401 is plated on the top of silicon nitride layer 1 301 by magnetron sputtering technology; silicon nitride layer 2 302 is plated on the top of aluminum oxide layer 1 401 by magnetron sputtering technology, and aluminum oxide layer 2 402 is plated on the top of silicon nitride layer 2 302 by magnetron sputtering technology; silicon nitride layer 303 is plated on the top of aluminum oxide layer 2 402 by magnetron sputtering technology, and aluminum oxide layer 3 403 is plated on the top of silicon nitride layer 3 303 by magnetron sputtering technology; silicon nitride layer 4 304 is plated on the top of silicon nitride layer 4 304 by magnetron sputtering technology, and aluminum oxide layer 4 404 is plated on the top of silicon nitride layer 4 304 by magnetron sputtering technology.

[0027] Specifically, the multilayer nano-film structure composed of silicon nitride layer 1 301, silicon nitride layer 2 302, silicon nitride layer 303, silicon nitride layer 4 304, aluminum oxide layer 1 401, aluminum oxide layer 2 402, aluminum oxide layer 3 403 and aluminum oxide layer 4 404 utilizes the excellent physical properties of titanium oxide, silicon nitride and aluminum oxide, including high hardness and good optical properties, and achieves super strong adhesion and surface hardness by controlling the thickness of each layer, while ensuring high transmittance.

[0028] See also Figure 1 In this embodiment, the thickness of the aluminum oxide layer 1 401, the aluminum oxide layer 2 402, the aluminum oxide layer 3 403 and the aluminum oxide layer 404 is 30 nanometers to 40 nanometers.

[0029] Specifically, the thickness of the aluminum oxide layer 1 401, the aluminum oxide layer 2 402, the aluminum oxide layer 3 403 and the aluminum oxide layer 404 are the same and are precisely controlled between 30 nanometers and 40 nanometers, thereby achieving excellent passivation effect, uniformity and optical properties.

[0030] See also Figure 1 In the present embodiment, the thickness of the silicon nitride layer 1 301 , the silicon nitride layer 2 302 , the silicon nitride layer 303 and the silicon nitride layer 4 304 is 30 nanometers to 50 nanometers.

[0031] Specifically, the thicknesses of silicon nitride layer 1 301 , silicon nitride layer 2 302 , silicon nitride layer 3 303 and silicon nitride layer 4 304 are the same and are precisely controlled between 30 nanometers and 50 nanometers, thereby providing excellent passivation performance and mechanical strength.

[0032] See also Figure 1-2 In this embodiment, a micro protrusion 101 is integrally formed at a position near the edge of the top of the glass cover substrate 1 , and the micro protrusion 101 has the same shape as that of the glass cover substrate 1 .

[0033] Specifically, by providing the micro protrusions 101 on the glass cover substrate 1, the contact area with the titanium oxide bottom layer 2 can be increased, so that the adhesion of the titanium oxide bottom layer 2 on the glass cover substrate 1 can be stronger, thereby improving the stability.

[0034] See also Figure 1 In this embodiment, the width and length of the coating layer 1 3 , the coating layer 2 4 and the titanium oxide bottom layer 2 are the same as the width and length of the glass cover substrate 1 .

[0035] Specifically, the length and width of each layer are the same as the length and width of the glass cover substrate 1, so that the adhesion flatness between the layers can be guaranteed, thereby ensuring the normal use of the glass cover substrate 1 in the subsequent use.

[0036] This application adopts the following scheme:

[0037] A titanium oxide bottom layer 2 (TiO2) with a thickness of 50 to 60 nanometers is used as a bottom layer, and is first plated onto the front surface of the glass cover substrate 1 by physical vapor deposition (PVD) technology to form a uniform and dense bottom layer to enhance the adhesion of subsequent film layers to the glass;

[0038] On the titanium oxide bottom layer 2, a silicon nitride layer 301, an aluminum oxide layer 401, a silicon nitride layer 302, an aluminum oxide layer 402, a silicon nitride layer 303, an aluminum oxide layer 403, a silicon nitride layer 304 and an aluminum oxide layer 404 are alternately plated by magnetron sputtering technology, wherein the thickness of the aluminum oxide layer 401, the aluminum oxide layer 402, the aluminum oxide layer 303 and the aluminum oxide layer 404 is controlled in a range of 30 nanometers to 40 nanometers, and the thickness of the silicon nitride layer 301, the silicon nitride layer 302, the silicon nitride layer 303 and the silicon nitride layer 404 is controlled in a range of 30 nanometers to 50 nanometers;

[0039] Four layers of film are alternately coated, namely four layers of silicon nitride and four layers of aluminum oxide, plus the bottom layer of titanium oxide, for a total of nine layers of film structure;

[0040] This multi-layer nano-film structure utilizes the excellent physical properties of titanium oxide, silicon nitride and aluminum oxide, including high hardness and good optical properties. By precisely controlling the thickness of each layer, it achieves super strong adhesion and surface hardness while ensuring high transmittance.

[0041] It should be noted that the thickness of the coating will affect its hardness and wear resistance. Thicker film layers usually provide better protection because they can more effectively disperse external forces and reduce the possibility of damage. The durability of the coating layer is directly related to its thickness, but it is also necessary to consider multiple factors such as the mechanical properties, stress accumulation, optical properties and material properties of the film layer. Therefore, this application optimizes the film layer structure and thickness, improves the film layer adhesion, the scratch resistance of the glass cover substrate 1, and maintains high transmittance to meet the specific optical parameters and physical properties of the surface cover of various application products. The performance requirements have broad market application prospects. The silicon nitride film layer (coating layer 1 3) formed by the silicon nitride layer 1 301, the silicon nitride layer 2 302, the silicon nitride layer 303, and the silicon nitride layer 4 304 mainly provides excellent passivation performance and mechanical strength (embodied in surface hardness), while the aluminum oxide film layer (coating layer 2 4) formed by the aluminum oxide layer 1 401, the aluminum oxide layer 2 402, the aluminum oxide layer 3 403, and the aluminum oxide layer 404 performs well in passivation effect, uniformity and optical properties. The combination of the two can effectively improve product performance and durability.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A new type of multi-layer coated glass cover with super strong adhesion and surface hardness, characterized in that: It comprises a glass cover substrate (1), a titanium oxide bottom layer (2) is arranged on the top of the glass cover substrate (1), and a coating layer 1 (3) and a coating layer 2 (4) are respectively arranged on the top of the titanium oxide bottom layer (2); The coating layer one (3) includes a silicon nitride layer one (301), a silicon nitride layer two (302), a silicon nitride layer three (303) and a silicon nitride layer four (304); The coating layer 2 (4) includes an aluminum oxide layer 1 (401), an aluminum oxide layer 2 (402), an aluminum oxide layer 3 (403) and an aluminum oxide layer 4 (404); The silicon nitride layer 1 (301), silicon nitride layer 2 (302), silicon nitride layer 3 (303), silicon nitride layer 4 (304), aluminum oxide layer 1 (401), aluminum oxide layer 2 (402), aluminum oxide layer 3 (403) and aluminum oxide layer 4 (404) are arranged at intervals on the titanium oxide bottom layer (2).

2. The novel multi-layer coated glass cover plate with super strong adhesion and surface hardness according to claim 1, characterized in that: The titanium oxide bottom layer (2) is plated on the top of the glass cover substrate (1) by physical vapor deposition technology, and the thickness of the titanium oxide bottom layer (2) is 50 nanometers to 60 nanometers.

3. The novel multi-layer coated glass cover plate with super strong adhesion and surface hardness according to claim 1, characterized in that: The silicon nitride layer 1 (301) is plated on the top of the titanium oxide bottom layer (2) by magnetron sputtering technology, and the aluminum oxide layer 1 (401) is plated on the top of the silicon nitride layer 1 (301) by magnetron sputtering technology.

4. The novel multi-layer coated glass cover plate with super strong adhesion and surface hardness according to claim 1, characterized in that: The second silicon nitride layer (302) is plated on the top of the first aluminum oxide layer (401) by magnetron sputtering technology, and the second aluminum oxide layer (402) is plated on the top of the second silicon nitride layer (302) by magnetron sputtering technology.

5. The novel multi-layer coated glass cover plate with super strong adhesion and surface hardness according to claim 1, characterized in that: The silicon nitride layer three (303) is plated on the top of the aluminum oxide layer two (402) by magnetron sputtering technology, and the aluminum oxide layer three (403) is plated on the top of the silicon nitride layer three (303) by magnetron sputtering technology.

6. The novel multi-layer coated glass cover plate with super strong adhesion and surface hardness according to claim 1, characterized in that: The silicon nitride layer four (304) is deposited on the top of the silicon nitride layer four (304) by magnetron sputtering technology, and the aluminum oxide layer four (404) is deposited on the top of the silicon nitride layer four (304) by magnetron sputtering technology.

7. The novel multi-layer coated glass cover plate with super strong adhesion and surface hardness according to claim 1, characterized in that: The thickness of the aluminum oxide layer 1 (401), the aluminum oxide layer 2 (402), the aluminum oxide layer 3 (403) and the aluminum oxide layer 4 (404) is 30 nanometers to 40 nanometers.

8. The novel multi-layer coated glass cover plate with super strong adhesion and surface hardness according to claim 1, characterized in that: The thickness of the silicon nitride layer 1 (301), the silicon nitride layer 2 (302), the silicon nitride layer 3 (303) and the silicon nitride layer 4 (304) is 30 nanometers to 50 nanometers.

9. The novel multi-layer coated glass cover plate with super strong adhesion and surface hardness according to claim 1, characterized in that: A micro protrusion (101) is also integrally formed at a position near the edge of the top of the glass cover substrate (1), and the micro protrusion (101) has the same shape as the glass cover substrate (1).

10. The novel multi-layer coated glass cover plate with super strong adhesion and surface hardness according to claim 1, characterized in that: The width and length of the coating layer 1 (3), the coating layer 2 (4) and the titanium oxide bottom layer (2) are all the same as the width and length of the glass cover substrate (1).

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