A multilayer composite cover plate coating structure
By using a multi-layer composite cover plate coating structure, the problem of traditional glass covers being easily damaged in high temperature, high humidity and complex chemical environments has been solved. This has resulted in improved performance such as high light transmittance, anti-reflection, wear resistance and corrosion resistance, meeting the high performance requirements of high-end electronic products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TRULY OPTO ELECTRONICS
- Filing Date
- 2025-05-16
- Publication Date
- 2026-06-16
Smart Images
Figure CN224366216U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cover plate technology, and more specifically, to a multi-layer composite cover plate coating structure. Background Technology
[0002] With the rapid development of technology, high-end electronic products are placing increasingly stringent requirements on display cover plates. These requirements extend beyond high light transmittance and anti-reflective properties; they also demand excellent durability, thermal stability, and chemical stability. Traditional glass cover plates are no longer sufficient to meet these diverse needs, especially given their susceptibility to damage under high temperature, high humidity, and complex chemical environments. Therefore, developing a novel cover plate coating structure that integrates high light transmittance, anti-reflection, wear resistance, high temperature resistance, and corrosion resistance is of paramount importance. Utility Model Content
[0003] The purpose of this invention is to propose a multi-layer composite cover plate coating structure, which aims to improve the overall performance of the cover plate and meet the high standards required by modern electronic products for cover plates.
[0004] Specifically, the technical solution of this utility model is as follows: a multi-layer composite cover plate coating structure is proposed, comprising:
[0005] The neodymium oxide layer has a thickness of 50-100 nanometers;
[0006] The strontium titanate layer has a thickness of 30-50 nanometers;
[0007] Lanthanum titanate layer, 20-30 nanometers thick;
[0008] The glass body serves as the substrate for each coating layer;
[0009] A thermochromic ink screen printing layer is applied to the back edge area of the glass body, with a thickness of 8-12 micrometers.
[0010] A polyester resin layer, with a thickness of 20-30 micrometers, covers the surface of the thermochromic ink layer.
[0011] A titanium diboride layer, with a thickness of 15-25 nanometers, serves as the innermost layer covering a polyester resin layer.
[0012] The glass body has two horizontal sides that extend outward and bulge upward, with the bulges surrounding the strontium titanate layer and the lanthanum titanate layer. The sides of the extended portions of the glass body have grooves cut out in the middle, which can be used to achieve embedded assembly with the customer's host casing.
[0013] As a preferred technical solution, the edges of the groove are made serrated by chemical etching, and a zinc sulfide layer is plated on the surface of the groove.
[0014] As a preferred technical solution, the upper surface of the extension is made into a serrated shape by a chemical etching process, and a zinc sulfide layer is plated on the etched serrated surface.
[0015] As a preferred technical solution, the neodymium oxide layer extends outward on both sides, covering the surface of the zinc sulfide layer.
[0016] As a preferred technical solution, the thickness of the neodymium oxide layer is 70-90 nanometers, its surface roughness Ra≤0.8nm, and its Vickers hardness≥8GPa; the difference between the thermal expansion coefficient of the strontium titanate layer and the glass body is ≤10%.
[0017] As a preferred technical solution, the lower surface of the extension is plated with a chromium layer of 200nm-250nm.
[0018] As a preferred technical solution, the polyester resin layer is composed of modified PET material with an elastic modulus of 2-3 GPa and an elongation at break of ≥150%.
[0019] As a preferred technical solution, the titanium diboride layer has a hexagonal crystal system with a preferred orientation of facets; the residual stress within the layer is controlled within the range of -200 to 100 MPa, and the microhardness is ≥25 GPa; the surface of the layer is coated with diamond-like carbon to form a 5-10 nm composite protective layer.
[0020] As a preferred technical solution, the neodymium oxide layer, strontium titanate layer and lanthanum titanate layer are sequentially deposited on the front side of the glass body through magnetron sputtering process, and the refractive index of each layer is distributed in a gradient, so as to achieve a light transmittance of ≥95% and a reflectance of ≤1.5%.
[0021] As a preferred technical solution, the glass body is chemically strengthened aluminosilicate glass with a surface compressive stress ≥700MPa.
[0022] The beneficial effects of this utility model are as follows: The cover plate coating layer structure proposed in this patent adopts a multi-layer composite coating technology, and the selection and combination of materials for each layer are based on their unique physical and chemical properties. The neodymium oxide layer, as the outermost layer, utilizes its high light transmittance and anti-reflection properties to reduce light reflection on the cover plate surface and improve the display effect. The strontium titanate layer, located below the neodymium oxide, further enhances the light transmittance and improves the overall performance of the cover plate due to its excellent dielectric properties and optical transparency. The lanthanum titanate layer provides good thermal and chemical stability, ensuring that the cover plate maintains stable performance in high temperature, high humidity, and complex chemical environments. The glass body serves as the substrate, providing necessary support and transparency for each coating layer. Grooves are cut into the center of the four edges, allowing for subsequent embedded assembly with the customer's host casing. The serrated areas are achieved through chemical etching of localized glass surfaces, giving them an anti-glare and frosted effect. Zinc sulfide is plated on the glass body, resulting in a semi-transparent, pale yellow effect.
[0023] The thermochromic ink screen printing layer adds fun and interactivity to the product, enhancing the user experience. The polyester resin layer and titanium diboride layer act as inner protective layers, effectively preventing scratches on the ink layer and ensuring the durability and aesthetics of the ink pattern. The 200-250 nanometer chromium coating on the back has a mirror effect. When the front is under strong light, the semi-transparent pale yellow zinc sulfide shines through, and the etching layer converts most of the direct light into diffuse reflection, creating a soft light. Because the grooved areas also have etching and zinc sulfide, the light will present different refracted lines and reflections at different angles. Furthermore, the final chromium layer has a mirror effect, reflecting the transmitted light back, creating a multi-angle pale yellow light effect around the cover, making it more decorative.
[0024] Overall, this coating structure achieves a comprehensive improvement in the performance of the cover plate through the synergistic effect of the materials in each layer, meeting the high-performance requirements of high-end electronic products for cover plates. Attached Figure Description
[0025] 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.
[0026] Figure 1 A schematic diagram of a multi-layer composite cover plate coating structure proposed in this utility model embodiment. Figure 1 ;
[0027] Figure 2 This is a partially enlarged schematic diagram of a multi-layer composite cover plate coating structure proposed in an embodiment of this utility model.
[0028] Explanation of reference numerals in the attached figures: 1. Neodymium oxide layer; 2. Strontium titanate layer; 3. Lanthanum titanate layer; 4. Glass body; 41. Extension; 42. Groove; 43. Serrated; 5. Zinc sulfide layer; 6. Chromium layer; 7. Thermochromic ink screen printing layer; 8. Polyester resin layer; 9. Titanium diboride layer. Detailed Implementation
[0029] 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.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] It should be noted that "multiple" as mentioned in this article refers to two or more.
[0034] Example
[0035] like Figure 1-2 As shown, this embodiment presents a multi-layer composite cover plate coating structure, comprising:
[0036] Neodymium oxide layer 1, with a thickness of 50-100 nanometers;
[0037] Strontium titanate layer 2, with a thickness of 30-50 nanometers;
[0038] Lanthanum titanate layer 3, with a thickness of 20-30 nanometers;
[0039] Glass body 4 serves as the substrate for each coating layer;
[0040] The thermochromic ink screen printing layer 7 is set on the back edge area of the glass body 4, with a thickness of 8-12 micrometers;
[0041] Polyester resin layer 8, covering the surface of thermochromic ink layer, with a thickness of 20-30 micrometers;
[0042] Titanium diboride layer 9, which serves as the innermost covering polyester resin layer 8, has a thickness of 15-25 nanometers.
[0043] The glass body 4 extends outward and protrudes upward on both sides of its horizontal edge, and the protrusion surrounds the strontium titanate layer 2 and the lanthanum titanate layer 3. A groove 42 is cut in the middle of the side of the extension 41 that extends outward on both sides of the glass body 4. The groove 42 can be used to achieve embedded assembly with the customer's host casing.
[0044] Preferably, the edges of the groove 42 are serrated 43 by chemical etching, and a zinc sulfide layer 5 is plated on the surface of the groove 42. The zinc sulfide has a semi-transparent pale yellow effect.
[0045] Preferably, the upper surface of the extension 41 is serrated 43 by a chemical etching process, and a zinc sulfide layer 5 is plated on the etched serrated 43 surface.
[0046] The thickness of zinc sulfide layer 5 is 100–150 nm.
[0047] Preferably, the neodymium oxide layer 1 extends outwards on both sides, covering the surface of the zinc sulfide layer 5. That is, the neodymium oxide layer 1 is the topmost layer of the entire cover plate as a transparent protective layer. Further, the thickness of the neodymium oxide layer 1 is 70-90 nanometers, its surface roughness Ra≤0.8nm, and its Vickers hardness≥8GPa; the difference in the coefficient of thermal expansion between the strontium titanate layer 2 and the glass body 4 is ≤10%.
[0048] Preferably, the lower surface of the extension 41 is plated with a chromium layer 6 of 200nm-250nm. It has a mirror effect. When there is strong light on the front, the semi-transparent pale yellow zinc sulfide passes through, and then the etching layer converts most of the direct light into diffuse reflection, turning it into soft light. Since the groove 42 part is also etched and zinc sulfide, the light will present different fold lines and reflection lines at different angles. Furthermore, the final chromium layer 6 has a mirror effect, which reflects the transmitted light back, creating a multi-angle pale yellow light effect around the perimeter, making the cover plate more decorative.
[0049] Preferably, the polyester resin layer 8 is made of modified PET material with an elastic modulus of 2-3 GPa and an elongation at break of ≥150%.
[0050] Preferably, the titanium diboride layer 9 has a hexagonal crystal structure with a preferred orientation of facets; the residual stress within the layer is controlled within the range of -200 to 100 MPa, and the microhardness is ≥25 GPa; the surface of the layer is coated with diamond-like carbon to form a 5-10 nm composite protective layer.
[0051] Preferably, the neodymium oxide layer 1, the strontium titanate layer 2, and the lanthanum titanate layer 3 are sequentially deposited on the front side of the glass body 4 by magnetron sputtering, and the refractive index of each layer is distributed in a gradient manner to achieve a light transmittance of ≥95% and a reflectance of ≤1.5%.
[0052] 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 multi-layer composite cover plate coating structure, characterized in that, include: The neodymium oxide layer has a thickness of 50-100 nanometers; The strontium titanate layer has a thickness of 30-50 nanometers; Lanthanum titanate layer, 20-30 nanometers thick; The glass body serves as the substrate for each coating layer; A thermochromic ink screen printing layer is applied to the back edge area of the glass body, with a thickness of 8-12 micrometers. A polyester resin layer, with a thickness of 20-30 micrometers, covers the surface of the thermochromic ink layer. A titanium diboride layer, with a thickness of 15-25 nanometers, serves as the innermost layer covering a polyester resin layer. The glass body has two horizontal sides that extend outward and bulge upward, with the bulges surrounding the strontium titanate layer and the lanthanum titanate layer. The sides of the outward extensions of the glass body have grooves cut out in the middle, which can be used to achieve embedded assembly with the customer's host casing.
2. The multi-layer composite cover plate coating structure according to claim 1, characterized in that, The edges of the groove are serrated by chemical etching, and a zinc sulfide layer is plated on the surface of the groove.
3. The multi-layer composite cover plate coating structure according to claim 2, characterized in that, The upper surface of the extension is serrated by a chemical etching process, and a zinc sulfide layer is plated on the etched serrated surface.
4. The multi-layer composite cover plate coating structure according to claim 3, characterized in that, The neodymium oxide layer extends outward on both sides, covering the surface of the zinc sulfide layer.
5. The multi-layer composite cover plate coating structure according to claim 1, characterized in that, The neodymium oxide layer has a thickness of 70-90 nanometers, a surface roughness Ra≤0.8nm, and a Vickers hardness≥8GPa; the difference in the coefficient of thermal expansion between the strontium titanate layer and the glass body is ≤10%.
6. The multi-layer composite cover plate coating structure according to claim 1, characterized in that, The lower surface of the extension is plated with a chromium layer of 200nm-250nm.
7. The multi-layer composite cover plate coating structure according to claim 1, characterized in that, The polyester resin layer is made of modified PET material with an elastic modulus of 2-3 GPa and an elongation at break of ≥150%.
8. The multi-layer composite cover plate coating structure according to claim 1, characterized in that, The titanium diboride layer has a hexagonal crystal system with a preferred orientation of facets; the residual stress within the layer is controlled within the range of -200 to 100 MPa, and the microhardness is ≥25 GPa; the surface of the layer is coated with diamond-like carbon to form a 5-10 nm composite protective layer.
9. The multi-layer composite cover plate coating structure according to any one of claims 1-8, characterized in that, The neodymium oxide layer, strontium titanate layer, and lanthanum titanate layer are sequentially deposited on the front side of the glass body using a magnetron sputtering process, and the refractive index of each layer is gradient-distributed to achieve a light transmittance of ≥95% and a reflectance of ≤1.5%.
10. The multi-layer composite cover plate coating structure according to any one of claims 1-8, characterized in that, The glass body is chemically strengthened aluminosilicate glass with a surface compressive stress ≥700MPa.