A coated cover plate and a jig for detecting the same

Abstract

This utility model relates to a coated cover plate and a fixture for testing it. The coated cover plate includes: a glass substrate as the base for the coating layer; a magnesium fluoride coating layer, a tin bronze alloy coating layer, and a Ni-B-Si alloy coating layer sequentially coated on the glass substrate from the outside to the inside; and a thermochromic ink screen printing layer, an aluminum bronze alloy layer, and a niobium carbide layer sequentially coated from the inside to the outside. The thickness of the magnesium fluoride coating layer is 50-100 nm; the thickness of the tin bronze alloy coating layer is 20-30 nm; the thickness of the Ni-B-Si alloy coating layer is 20-30 nm; the thickness of the glass substrate is 0.5-3 mm; the thickness of the thermochromic ink screen printing layer is 8-12 μm; the thickness of the aluminum bronze alloy layer is 30-40 nm; and the thickness of the first niobium carbide layer is 15-25 nm. This novel cover plate coating layer structure, through a carefully designed multi-layer coating technology, achieves a comprehensive improvement in the performance of the glass cover plate.

Description

Technical Field

[0001] This utility model relates to the field of cover plate technology, and more specifically, to a coated cover plate and a fixture for detecting it. Background Technology

[0002] With the widespread adoption and diversification of electronic products, the requirements for display cover plates are increasing. While traditional glass cover plates possess basic transparency and structural strength, they fall short in terms of anti-reflection, abrasion resistance, corrosion resistance, and aesthetics. Especially in applications such as high-end smartphones, tablets, and wearable devices, cover plates not only need excellent light transmission but also must maintain long-term stability and a good user experience under complex operating environments. Therefore, developing a cover plate coating structure that integrates high light transmittance, strong abrasion resistance, good corrosion resistance, and unique visual effects has become a pressing technical challenge for the industry. Utility Model Content

[0003] The purpose of this invention is to provide a coated cover plate and a fixture for its testing, thereby solving some of the technical problems existing in the prior art.

[0004] Specifically, the specific technical solution of this utility model is as follows: a coated cover plate is proposed, comprising:

[0005] The glass substrate serves as the base for the coating layer;

[0006] From the outside to the inside, a magnesium fluoride coating layer, a tin bronze alloy coating layer, and a Ni-B-Si alloy coating layer are deposited on the glass substrate in sequence.

[0007] The layers are plated sequentially from the inside out: a thermochromic ink screen printing layer, an aluminum bronze alloy layer, and a first niobium carbide layer.

[0008] The thickness of the magnesium fluoride coating is 50-100 nm; the thickness of the tin bronze alloy coating is 20-30 nm; the thickness of the Ni-B-Si alloy coating is 20-30 nm.

[0009] The thickness of the glass substrate is 0.5-3mm;

[0010] The thickness of the thermochromic ink screen printing layer is 8-12μm; the thickness of the aluminum bronze alloy layer is 30-40nm.

[0011] The thickness of the first niobium carbide layer is 15-25 nm;

[0012] In addition, a second niobium carbide layer is coated around the outer edge of the coated cover plate to improve the hardness and wear resistance of the coated cover plate.

[0013] As a preferred technical solution, the refractive index of the magnesium fluoride coating layer is controlled between 1.35 and 1.42, and the surface roughness Ra ≤ 5 nm.

[0014] As a preferred technical solution, the Vickers hardness of the tin bronze alloy coating reaches 280-320HV.

[0015] As a preferred technical solution, the thermochromic ink screen printing layer contains thermochromic microcapsules with a color-changing temperature threshold of 25-45℃ and a color change contrast ΔE≥15.

[0016] As a preferred technical solution, the surface of the thermochromic ink screen printing layer is formed with a microstructure pattern, the pattern depth being 20-40% of the ink layer thickness, including spaced recessed areas and raised areas.

[0017] As a preferred technical solution, an aluminum oxide passivation film is formed on the surface of the aluminum bronze alloy layer, and the thickness of the aluminum oxide passivation film is 2-5nm.

[0018] As a preferred technical solution, a gradient transition layer is provided between each coating layer, and the thickness of the transition layer is 5-10nm.

[0019] As a preferred technical solution, the glass substrate is chemically strengthened glass with a surface compressive stress layer depth ≥30μm and a compressive stress ≥600MPa.

[0020] On the other hand, a cover plate inspection fixture is proposed for inspecting the external dimensions of the coated cover plate as described above, including a groove for accommodating the cover plate, wherein the upper ends of the two opposite sides of the groove are provided with a concave inclined structure, the concave inclined structure is provided to facilitate the removal and placement of the cover plate from the groove.

[0021] As a preferred technical solution, the concave-sloping part is inclined at an angle of 45° to 60° relative to the bottom of the groove, and the concave-sloping part is set on the opposite side of the groove.

[0022] The beneficial effects of this utility model are: the new cover plate coating layer structure, through a carefully designed multi-layer coating technology, achieves a comprehensive improvement in the performance of the glass cover plate.

[0023] First, a magnesium fluoride coating is applied to the outermost layer of the glass cover. Its extremely low refractive index and excellent chemical stability effectively reduce light reflection, improve light transmittance, and protect the glass surface from corrosion. Subsequently, a tin bronze alloy layer and a Ni-B-Si alloy layer are sequentially layered. These two coatings, with their unique physical and chemical properties, jointly enhance the cover's wear resistance and corrosion resistance, ensuring the long-term stability of the coating layers.

[0024] The glass body serves as the base, providing basic transparency and structural support. A thermochromic ink screen-printed layer is used on the back edge of the cover plate, giving the product a unique visual effect that changes with temperature, enhancing user interactivity and aesthetics. To prevent scratches on the ink layer, an aluminum bronze alloy layer is added beneath it, providing robust protection for the ink with its high hardness and excellent corrosion resistance.

[0025] Finally, the innermost layer uses niobium carbide, which, with its extremely high hardness and wear resistance, provides additional protection for the entire coating structure, ensuring the long-term stability of the overall structure. This multi-layer coating structure design, through the synergistic effect of each layer of materials, achieves a comprehensive improvement in the cover plate's performance in terms of light transmittance, wear resistance, aesthetics, and durability.

[0026] Furthermore, a niobium carbide layer is deposited around the perimeter of the coated cover plate to improve the overall hardness and wear resistance of the cover plate, providing ultimate protection for the entire edge of the coated cover plate.

[0027] On the other hand, this application also proposes a cover plate shape inspection fixture. After the cover plate is prepared, the shape is first inspected by the fixture. Cover plates that do not meet the size requirements cannot be placed in the fixture and are thus rejected, thereby preventing cover plates that do not meet the size requirements from flowing out. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a schematic diagram of the stacking structure of a coated cover plate according to Embodiment 1 of this utility model;

[0030] Figure 2 This is a top view of a coated cover plate according to Embodiment 1 of this utility model.

[0031] Figure 3 This is a top view of a cover plate detection fixture according to Embodiment 2 of this utility model;

[0032] Figure 4 This is a side view of a cover plate detection fixture proposed in Embodiment 2 of this utility model.

[0033] Explanation of reference numerals in the attached drawings: Glass substrate 1; Viewing area 11; Magnesium fluoride coating layer 21; Tin bronze alloy coating layer 22; Ni-B-Si alloy coating layer 23; Thermochromic ink screen printing layer 3; Aluminum bronze alloy layer 4; First niobium carbide layer 5; Second niobium carbide layer 6; Fixture body 7; Groove position 71; Angled position 72. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] It should be noted that "multiple" as mentioned in this article refers to two or more.

[0039] Example 1

[0040] like Figure 1-2 The diagram shows a schematic of a coated cover plate structure proposed in this example, including:

[0041] The glass substrate serves as the base for the coating layer; here, the glass substrate can be a regular rectangle or an irregular shape, thus being used to fabricate an irregularly shaped screen. See the structural diagram given in this embodiment.

[0042] From the outside to the inside, a magnesium fluoride coating layer, a tin bronze alloy coating layer, and a Ni-B-Si alloy coating layer are deposited on the glass substrate in sequence.

[0043] The thermochromic ink screen printing layer, the aluminum bronze alloy layer, and the first niobium carbide layer are sequentially plated from the inside out; the thermochromic ink screen printing layer is printed on the non-viewing area of ​​the glass substrate, forming the viewing area in the middle.

[0044] The thickness of the magnesium fluoride coating is 50-100nm; its extremely low refractive index and good chemical stability effectively reduce light reflection, improve light transmittance, and protect the glass surface from corrosion.

[0045] The thickness of the tin bronze alloy coating is 20-30 nm; the thickness of the Ni-B-Si alloy coating is 20-30 nm. These two coatings, with their unique physical and chemical properties, together enhance the wear resistance and corrosion resistance of the cover plate, ensuring the long-term stability of the coating.

[0046] The thickness of the glass substrate is 0.5-3mm;

[0047] The thickness of the thermochromic ink screen printing layer is 8-12 μm; the thickness of the aluminum bronze alloy layer is 30-40 nm; the thickness of the first niobium carbide layer is 15-25 nm. To prevent scratches on the ink layer, an aluminum bronze alloy layer is added below the ink, providing solid protection for the ink with its high hardness and good corrosion resistance. The innermost layer uses a niobium carbide layer, which provides additional protection for the entire coating structure with its extremely high hardness and wear resistance, ensuring the long-term stability of the overall structure.

[0048] Furthermore, a second niobium carbide layer is deposited around the periphery of the coated cover plate to improve its hardness and wear resistance.

[0049] The first and second niobium carbide layers can be deposited integrally or in stages.

[0050] Preferably, the refractive index of the magnesium fluoride coating is controlled between 1.35 and 1.42, and the surface roughness Ra is ≤ 5 nm.

[0051] Preferably, the Vickers hardness of the tin bronze alloy coating layer reaches 280-320 HV.

[0052] Preferably, the thermochromic ink screen printing layer contains thermochromic microcapsules with a color-changing temperature threshold of 25-45℃ and a color change contrast ΔE≥15.

[0053] Preferably, the surface of the thermochromic ink screen printing layer has a microstructure pattern, the pattern depth of which is 20-40% of the ink layer thickness, including spaced recessed and raised areas. This enhances the visual appeal of the cover plate.

[0054] Preferably, an aluminum oxide passivation film is formed on the surface of the aluminum bronze alloy layer, and the thickness of the aluminum oxide passivation film is 2-5 nm.

[0055] Preferably, a gradient transition layer with a thickness of 5-10 nm is provided between each coating layer to ensure a strong bond between the coating layers.

[0056] Preferably, the glass substrate is chemically strengthened glass, with a surface compressive stress layer depth ≥30μm and a compressive stress ≥600MPa.

[0057] like Figure 3-4 As shown, this embodiment presents a cover plate inspection fixture for detecting whether the shape of a coated cover plate as described in Embodiment 1 meets factory requirements. The fixture includes a fixture body with a recessed area for accommodating the cover plate. The upper ends of the two opposite sides of the recessed area are provided with concave inclined structures. (Reference) Figure 3 The diagram shows a concave, angled structure and its enlarged version. The concave, angled structure is designed to facilitate the removal and placement of the cover plate from the recessed area. Operators can remove the cover plate by hand or with tweezers at the concave, angled location.

[0058] Specifically, the main purpose of this inspection fixture is to check whether the shape of the prepared coated cover plate meets the factory requirements. If the prepared cover plate is larger than the size requirement, it cannot be placed in the groove and will get stuck at the edge of the groove during placement. If it is smaller than the size requirement, the edge will not abut against the edge of the groove after placement, leaving a gap, which is also visually apparent. The fixture facilitates macroscopic inspection of whether the shape meets the requirements, facilitates the removal of defective products, reduces subsequent inspection work, and improves work efficiency.

[0059] Preferred, such as Figure 4 As shown, the concave angle is tilted at an angle of 45° to 60° relative to the bottom of the groove, and the concave angle is set on the opposite side of the groove. This arrangement makes it easier for operators to pick up and put down the parts.

[0060] 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 plate, characterized in that, include: The glass substrate serves as the base for the coating layer; From the outside to the inside, a magnesium fluoride coating layer, a tin bronze alloy coating layer, and a Ni-B-Si alloy coating layer are deposited on the glass substrate in sequence. The layers are plated sequentially from the inside out: a thermochromic ink screen printing layer, an aluminum bronze alloy layer, and a first niobium carbide layer. The thickness of the magnesium fluoride coating is 50-100 nm; the thickness of the tin bronze alloy coating is 20-30 nm; the thickness of the Ni-B-Si alloy coating is 20-30 nm. The thickness of the glass substrate is 0.5-3 mm; The thickness of the thermochromic ink screen printing layer is 8-12 μm; the thickness of the aluminum bronze alloy layer is 30-40 nm; and the thickness of the first niobium carbide layer is 15-25 nm. The outer periphery of the coated cover plate is further coated with a second niobium carbide layer to improve the hardness and wear resistance of the coated cover plate.

2. The coated cover plate according to claim 1, characterized in that, The refractive index of the magnesium fluoride coating is controlled between 1.35 and 1.42, and the surface roughness Ra is ≤ 5 nm.

3. The coated cover plate according to claim 1, characterized in that, The Vickers hardness of the tin bronze alloy coating reaches 280-320 HV.

4. A coated cover plate according to claim 1, characterized in that, The thermochromic ink screen printing layer contains thermochromic microcapsules with a color-changing temperature threshold of 25-45℃ and a color change contrast ΔE≥15.

5. A coated cover plate according to claim 4, characterized in that, The surface of the thermochromic ink screen printing layer has a microstructure pattern, the depth of which is 20-40% of the ink layer thickness, and includes spaced recessed areas and raised areas.

6. A coated cover plate according to claim 1, characterized in that, An aluminum oxide passivation film is formed on the surface of the aluminum bronze alloy layer, and the thickness of the aluminum oxide passivation film is 2-5 nm.

7. A coated cover plate according to claim 1, characterized in that, A gradient transition layer with a thickness of 5-10 nm is provided between each coating layer.

8. A coated cover plate according to any one of claims 1-7, characterized in that, The glass substrate is chemically strengthened glass with a surface compressive stress layer depth ≥30μm and a compressive stress ≥600MPa.

9. A cover plate testing fixture, characterized in that, The device is used to detect the external dimensions of the coated cover plate as described in any one of claims 1-8, including a groove for accommodating the cover plate, wherein the upper ends of the two opposite sides of the groove are provided with a concave inclined structure, the concave inclined structure being provided to facilitate the removal and placement of the cover plate from the groove.

10. A cover plate testing fixture according to claim 9, characterized in that, The concave angle is inclined at an angle of 45° to 60° relative to the bottom of the groove, and the concave angle is disposed on the opposite side of the groove.

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