A masking device and a masking method for coated glass.

Abstract

This invention provides a masking device and a masking method for coated glass. The masking device includes a support assembly and a cover plate assembly. The support assembly includes a support plate and a slot disposed on the edge of the support plate. The cover plate assembly includes a hollow cover plate and a positioning pin. The positioning pin and the slot cooperate to fix the hollow cover plate to the support plate. Using the masking device provided by this invention, coating and masking of thin glass with a thickness of 0.5-2.1 mm can be achieved, and the position fluctuation of the film removal is less than ±0.5 mm, and the ghosting width is within 1 mm.

Description

Technical Field

[0001] This invention relates to a masking device and a masking method for coated glass, belonging to the field of coating and removal technology for coated glass. Background Technology

[0002] Vehicle-to-Everything (C-V2X) is a cellular network that enables wireless communication and information exchange between people, vehicles, roads, and the internet. Depending on the communication partner, C-V2X communication can be categorized into V2V (vehicle-to-vehicle), V2I (vehicle-to-infrastructure), V2P (vehicle-to-person), and V2N (vehicle-to-internet). With the increasing prevalence of automobiles and the diversification of usage scenarios, cars are gradually evolving into intelligent terminals similar to smartphones, making C-V2X systems a crucial feature for improving the in-car experience. C-V2X represents a new industrial form involving deep interaction across multiple sectors, including communications, electronics, automotive, transportation, and energy. Based on dedicated / cellular communication networks, C-V2X operates according to agreed-upon communication protocols and data exchange standards, facilitating wireless communication and information exchange between V and X (people, vehicles, and roads). This enables the integration of intelligent traffic management, intelligent dynamic information services, and intelligent vehicle control. VX connects people, vehicles, and roads in a unified manner, achieving data interoperability and information sharing, ultimately realizing intelligent transportation, intelligent vehicles, and intelligent driving functions. It can not only support vehicles in perceiving more information and promote innovation and application of autonomous driving technology, but also help build a smart transportation system and promote the development of new models and new business forms of automobiles and transportation services.

[0003] The On-Board Unit (OBU) for vehicles is currently the primary solution for connected vehicles. The main OBU product is the T-Box, short for Telematics-Box (Vehicle Connectivity Control Unit). This refers to an embedded system installed in a vehicle for controlling and tracking the vehicle. It mainly consists of a mobile communication unit (4G / 5G), a C-V2X communication unit, a GNSS high-precision positioning module, a microprocessor, an in-vehicle bus controller, and memory. The T-Box is responsible for monitoring and controlling the vehicle's status. With the T-Box, we can provide the vehicle with functions including driving data acquisition, driving trajectory recording, vehicle fault monitoring, remote vehicle querying, and control through key components such as 4G or 5G remote wireless communication, GPS satellite positioning, and acceleration sensors. In the future, the T-Box will become even more powerful, enabling real-time communication between vehicles and cloud platforms, between vehicles, and between vehicles and road infrastructure, among other traffic participants.

[0004] In 2016, Tesla first introduced the panoramic sunroof design on its Model 3 and Model S models, greatly improving the view over the roof and leading the trend. Subsequently, other automakers followed suit. The main differences between a panoramic sunroof and a panoramic sunroof are: ① A panoramic sunroof can be opened, while a panoramic sunroof cannot, resulting in a simpler structure. ② To accommodate the opening mechanism, a panoramic sunroof typically covers no more than two-thirds of the roof area, while a panoramic sunroof can cover the entire roof, offering a larger area and thus a better view over the roof. According to our estimates, the current penetration rate of panoramic sunroofs is approximately 5%, and as more major models adopt this design, it is expected to further drive the sunroof trend.

[0005] When using panoramic sunroofs, their heat insulation function also needs to be considered. Initially, simple sunshades were used, but their effectiveness was not ideal. The latest technology uses heat-insulating glass (low-emissivity glass / LOW-E glass). Through a coating technology (usually silver plating), the glass allows visible light to pass through while reflecting a large amount of infrared radiation (the source of heat) and ultraviolet rays. This prevents external heat from transferring into the car in summer and prevents heat from escaping from the car in winter, achieving a comfortable temperature year-round. This heat-insulating glass technology has been widely applied to architectural glass, and automakers are also experimenting with its application to panoramic sunroofs. Models such as the NIO EC6, XPeng P7, and BYD Song MAX all use coated LOW-E glass as their panoramic sunroofs, which can block approximately 80% of heat and over 90% of ultraviolet rays, demonstrating significant effectiveness.

[0006] Coated glass, formed by depositing transparent conductive films on the surface of glass substrates using chemical vapor deposition (CVD) or physical vapor deposition (PVD) techniques, has been widely used in vehicles and buildings. Based on the good conductivity and infrared reflectivity of the metal layer, metal alloy layer, or transparent conductive oxide layer in the transparent conductive film, such coated glass has electric heating and / or heat insulation functions. Currently, this technology can be used on automotive glass. The flat glass sheet is heated primarily through thermal radiation from heating elements within a furnace. Compared to the glass sheet itself, the transparent conductive film exhibits higher reflectivity and lower absorption of thermal radiation. If areas without the transparent conductive film are formed on the flat glass sheet before it is heated and bent, the temperature of these areas will be higher than that of the areas covered by the film during the subsequent softening process. This can even create temperature gradients of tens or hundreds of degrees Celsius across different areas of the flat glass sheet, leading to kinetic differences during the bending process. This results in localized optical distortion in the final bent glass sheet, particularly noticeable in the areas without the transparent conductive film and their boundaries. Consequently, this can cause problems such as poor shape matching with the design, perspective distortion in the field of view, and images that do not meet requirements. Due to the significant differences in properties between the two glass sheets, a double-sheet pressing process is typically used for production. Because the transparent conductive layer has not undergone high-temperature crystallization, its surface compressive strength is relatively poor, thus placing increasingly stringent requirements on the insulating layer between the two glass sheets.

[0007] To prevent the offline coated low-emissivity (LOW-E) glass from coming into contact with air and water, the coated glass is usually decoated after coating is completed, and then assembled into insulated glass within 48 hours. This protects the functional coating and allows it to maintain its low-emissivity performance for a long time.

[0008] This indicates that, on the one hand, coated heat-insulating glass sunroofs are becoming a basic feature of mid-to-high-end new energy vehicles; on the other hand, intelligent connected vehicles are developing rapidly, requiring the installation of various types of transceiver antenna modules under the sunroof. However, existing coated heat-insulating glass sunroofs lack electromagnetic signal exchange windows, hindering information exchange. Customers require the creation of sunroof windows for transmission and reception while maintaining heat insulation performance and aesthetics, which places extremely high demands on the positional accuracy of the coating removal technology.

[0009] Therefore, providing a novel masking device and a masking method for coated glass has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0010] To address the aforementioned shortcomings and deficiencies, one object of the present invention is to provide a masking device.

[0011] Another object of the present invention is to provide a masking method for coated glass, which is implemented using the masking device described above.

[0012] To achieve the above objectives, the present invention provides a masking device, wherein the masking device includes a support component assembly and a cover plate assembly, the support component assembly includes a support plate and a slot disposed on the edge of the support plate, and the cover plate assembly includes a hollow cover plate and a positioning pin; the positioning pin and the slot cooperate to fix the hollow cover plate to the support plate.

[0013] In this invention, the positioning pin and the slot are matched in terms of their contours (i.e., their concave and convex fits), quantity, and position, so that the hollow cover plate is fixedly connected to the support plate by embedding the positioning pin into the slot.

[0014] To ensure better horizontal positioning, the masking device has at least two positioning pins and two slots. For example, in some specific embodiments of the present invention, the number of positioning pins and slots is two, or the number of positioning pins and slots is three.

[0015] In the masking device provided by the present invention, the hollow cover plate has an inner frame area (i.e., a hollow area), which is designed according to the film removal area of ​​the product.

[0016] In one specific embodiment of the masking device described above in this invention, the support plate is a 2-6mm thick plate.

[0017] As a specific embodiment of the mask device described above in this invention, the support plate includes an aluminum plate, an aluminum alloy plate, a stainless steel plate, an acrylic plate, or a PC plate, etc.

[0018] In one specific embodiment of the masking device described above in this invention, the side of the support plate facing the hollow cover plate, that is, the side of the support plate that contacts the glass to be coated, is covered with anti-slip tape.

[0019] As a specific embodiment of the mask device described above in this invention, the materials of the slot and the positioning pin include one of polymethyl methacrylate, polybutylene terephthalate, polyphenylene ether resin, polycarbonate, polyamide, polytetrafluoroethylene, and polyphenylene ether.

[0020] In one specific embodiment of the mask device described above in this invention, the thickness of the hollow cover plate is 2-6 mm.

[0021] As a specific embodiment of the mask device described above in this invention, the hollow cover plate includes a single-piece cover plate or a double-piece cover plate.

[0022] As a specific embodiment of the mask device described above in this invention, the single-piece cover plate includes an aluminum plate, an aluminum alloy plate, a stainless steel plate, an acrylic plate, or a PC plate, etc.

[0023] In one specific embodiment of the masking device described above, one or more sides of the inner frame area of ​​the monolithic cover plate are provided with rounded corners, bevels, or stepped structures. That is, the upper and lower surfaces of any one or more sides of the inner frame area of ​​the monolithic cover plate are connected by rounded corners, bevels, or stepped structures. Providing rounded corners, bevels, or stepped structures in the inner frame area of ​​the monolithic cover plate can effectively reduce the ghosting width.

[0024] In the masking device provided by the present invention, the inner frame area of ​​the hollow cover plate can be a regular shape or an irregular shape, and can be reasonably selected according to the actual on-site operation conditions.

[0025] In one specific embodiment of the masking device described above, one or more sides of the inner frame area of ​​the double-piece cover plate are provided with a stepped structure. For the double-piece cover plate, the stepped structure is relatively easy to implement; for example, it can be achieved by fitting upper and lower cover plates of different sizes together.

[0026] In one specific embodiment of the mask device described above in this invention, the radius of the rounded corner is 2-8 mm, the angle of the bevel is 30°-60°, and the height of the stepped structure is 0.3-1 mm.

[0027] As a specific embodiment of the masking device described above in this invention, the double-layer cover plate is formed by gluing an upper cover plate and a lower cover plate together. The lower cover plate includes one of the following materials with good toughness: stainless steel plate, aluminum alloy plate, polytetrafluoroethylene plate, polyethylene plate, and polypropylene plate. The upper cover plate includes one of the following materials: aluminum alloy plate, polyethylene terephthalate plate, polyethylene plate, and polypropylene plate.

[0028] In one specific embodiment of the masking device described above in this invention, the thickness of the lower cover plate is 0.3-1 mm, and the thickness of the upper cover plate is 2-5 mm.

[0029] In one specific embodiment of the masking device described above, the width of the inner frame area of ​​the lower cover plate is 3-5 mm smaller than the width of the inner frame area of ​​the upper cover plate.

[0030] In one specific embodiment of the masking device described above in this invention, when the sampling length is 0.08 mm, the surface roughness of the upper surface of the hollow cover plate is 10-75 μm. Specifically, when the hollow cover plate is a double-plate cover plate, the surface roughness of the upper surface of the upper cover plate in the double-plate cover plate is 10-75 μm (sampling length 0.08 mm).

[0031] In a specific embodiment of the masking device described above in this invention, a modified film layer is adhered to the upper surface of the hollow cover plate, wherein the material of the modified film layer is an adhesion promoter, that is, the hollow cover plate is a cover plate whose upper surface has been surface modified by an adhesion promoter.

[0032] In one specific embodiment of the masking device described above in this invention, the adhesion promoter includes one or a combination of several of the following: organosilane adhesion promoters, organotitanic acid adhesion promoters, zircon adhesion promoters, zirconium aluminate adhesion promoters, and phosphate ester adhesion promoters. In some embodiments of this invention, the phosphate ester adhesion promoter may be, for example, an alkyl phosphate ester.

[0033] As a specific embodiment of the mask device described above in this invention, the method for preparing the modified film layer, i.e., the adhesion promoter surface modification treatment, includes:

[0034] Step (1): Spray the adhesion promoter solution evenly onto the upper surface of the hollow cover plate;

[0035] Step (2): Bake the cover plate obtained in step (1). After baking, the modified film layer is adhered to the upper surface of the hollow cover plate.

[0036] As a specific embodiment of the mask device described above in this invention, step (1) further includes: first roughening the upper surface of the hollow cover plate, and then uniformly spraying the adhesion promoter solution onto the upper surface of the hollow cover plate.

[0037] In one specific embodiment of the masking device described above in this invention, the adhesion promoter solution, based on a total weight of 100%, contains 1-10 wt% adhesion promoter and 90-99 wt% solvent. This invention does not specify the exact substance of the solvent used and allows for selection based on actual on-site operational needs. For example, in some embodiments of this invention, the solvent includes propylene glycol methyl ether or ethanol.

[0038] In one specific embodiment of the masking device described above in this invention, the baking is performed in an oven at 80-180°C for 8-16 hours, or by baking with a flame at a temperature of 800-1500°C.

[0039] As a specific embodiment of the masking device described above in this invention, when the material of the upper cover plate of the single-piece cover plate or the double-piece cover plate is metal, the baking includes baking back and forth with a high-temperature flame of liquefied natural gas and / or petroleum gas to quickly form a carburized oxide layer on the upper surface of the cover plate; when the material of the upper cover plate of the single-piece cover plate or the double-piece cover plate is other than metal, the baking can be carried out in an oven.

[0040] For ITO film systems with both anti-reflective and heat-reflective functions, the first layer is generally silicon oxide or silicon nitride. However, silicon oxide and silicon nitride are not compatible with metals and organic materials, which can cause the film deposited on the cover plate to drift onto the glass to be coated with the sputtering gas flow, resulting in appearance defects in the finished product. To address this, the present invention modifies the upper surface of the hollow cover plate (upper cover plate) with an adhesion promoter to form an adhesion film layer. This adhesion film layer effectively adheres to the upper surface of the cover plate and cannot be removed even with tape. Therefore, the film deposited on the cover plate will not drift onto the glass to be coated with the sputtering gas flow, thus avoiding defects in the produced coated glass caused by cover plate shedding.

[0041] On the other hand, the present invention also provides a masking method for coated glass, wherein the method is implemented using the masking device described above, and includes:

[0042] Step 1): Place the glass to be coated on the support plate, and then insert the positioning pin into the slot to fix the hollow cover plate to the support plate.

[0043] Step 2): Apply a coating to the glass to be coated;

[0044] Step 3): After the coating process is completed, pull out the positioning pin from the slot and remove the hollow cover plate to complete the coating and masking of the glass to be coated.

[0045] In one specific embodiment of the masking method described above in this invention, the size of the support plate is at least greater than or equal to the size of the glass to be coated.

[0046] In one specific embodiment of the masking method described above in this invention, the glass to be coated is sodium-calcium-based or borosilicate-based glass, the coating process is performed by magnetron sputtering, and the final finished glass is ITO coated glass.

[0047] Compared with the prior art, the beneficial technical effects achieved by the present invention include:

[0048] (1) The metal masking device currently in use only includes a cover plate. This cover plate can only be used for masking of glass to be coated with a thickness greater than 2 mm. It cannot be used for glass to be coated with a thickness of less than 2 mm. This is because when the device is running, it only relies on the thinner glass to be coated to support the cover plate so that it can run on the coating roller. The glass will be crushed. However, the masking device provided by the present invention includes a support component assembly and a cover plate assembly. For glass to be coated with a thickness of less than 2 mm, it can be placed on the support component without bearing the pressure of the roller. Therefore, using the masking device, coating and masking of thin glass with a thickness of 0.5-2.1 mm can be achieved.

[0049] (2) Most of the metal mask devices currently in use align and position the cover plate and the glass to be coated by manual clamping. The manual operation has large fluctuations, with position fluctuations reaching ±3mm, which makes it impossible to guarantee the film removal position. However, the support component and cover plate component of the mask device provided by the present invention include a slot and a positioning pin, respectively. By embedding the positioning pin into the slot, the hollow cover plate is fixed to the support plate, thereby ensuring that the film removal position fluctuation is less than ±0.5mm.

[0050] (3) When using the masking device provided by the present invention for coating and masking, the ghost width can be controlled within 1 mm. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a schematic diagram of the mask device provided in Embodiment 1 of the present invention.

[0053] Figure 2 This is a schematic diagram of the mask device provided in Embodiment 2 of the present invention.

[0054] Figure 3 This is a schematic diagram of the mask device provided in Embodiment 3 of the present invention.

[0055] Explanation of main icon numbers:

[0056] 1. Support plate;

[0057] 11. Card slot;

[0058] 2. Hollow cover plate;

[0059] 21. Positioning pin;

[0060] 22. Inner frame area;

[0061] 3. Glass to be coated. Detailed Implementation

[0062] It should be noted that the term "comprising" and any variations thereof in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0063] The "range" disclosed in this invention is given in the form of a lower limit and an upper limit. It can be one or more lower limits and one or more upper limits, respectively. A given range is defined by selecting a lower limit and an upper limit. The selected lower and upper limits define the boundaries of the particular range. All ranges defined in this way are composable, meaning that any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60-120 and 80-110 are listed for specific parameters, it is also expected that ranges of 60-110 and 80-120 are also expected. Furthermore, if the listed minimum range values ​​are 1 and 2, and the listed maximum range values ​​are 3, 4, and 5, then the following ranges are all expected: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5.

[0064] In this invention, unless otherwise specified, the numerical range "ab" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0-5" indicates that all real numbers between "0-5" have been listed in this invention, and "0-5" is simply a shortened representation of these numerical combinations.

[0065] In this invention, unless otherwise specified, all embodiments and preferred embodiments mentioned in this invention can be combined with each other to form new technical solutions.

[0066] In this invention, unless otherwise specified, all technical features and preferred features mentioned in this invention can be combined with each other to form new technical solutions.

[0067] In this invention, unless otherwise specified, the term "two kinds" as used in this specification means "at least two kinds".

[0068] In this invention, unless otherwise specified, all steps mentioned herein may be performed sequentially or randomly, but are preferably performed sequentially. For example, if the method includes steps (a) and (b), it means that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, if the method may also include step (c), it means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0069] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying tables, drawings, and embodiments. The embodiments described below are some, but not all, embodiments of this invention, and are only used to illustrate the invention, and should not be considered as limiting the scope of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0070] Example 1

[0071] This embodiment provides a mask device, the structural schematic diagram of which is shown below. Figure 1 As shown, from Figure 1 As can be seen from the above, the mask device includes:

[0072] The support component assembly includes a support plate 1 and two slots 11 respectively disposed on the adjacent edges of the support plate. The cover plate assembly includes a hollow cover plate 2 and two positioning pins 21. The positioning pins 21 and the slots 11 cooperate to fix the hollow cover plate 2 to the support plate 1.

[0073] The support plate 1 is a 2mm thick aluminum alloy plate. The size of the support plate 1 is 10mm larger than the glass 3 to be coated, that is, the length and width of the support plate 1 are 10mm larger than the length and width of the glass 3 to be coated. The side of the support plate 1 that contacts the glass 3 to be coated is covered with anti-slip tape. The two slots 11 are made of polymethyl methacrylate.

[0074] The hollow cover plate 2 is a 2.5mm thick stainless steel single-piece cover plate, and one side of the inner frame area 22 of the hollow cover plate 2, namely... Figure 1The irregular side of the inner frame area shown has a stepped structure (not shown in the figure). The step structure has a height of 0.3 mm and a width of 4 mm. The upper surface of the hollow cover plate 2 has been surface modified with an organic titanate adhesion promoter, that is, a modified film layer is adhered to the upper surface of the hollow cover plate 2. The material of the modified film layer is an organic titanate adhesion promoter. The material of the positioning pin 21 is polymethyl methacrylate.

[0075] The surface modification treatment includes: uniformly spraying an adhesion promoter solution containing 2 wt% organic titanate adhesion promoter and 98 wt% ethanol solvent onto the upper surface of the hollow cover plate; and then baking the cover plate in an 80°C oven for 8 hours.

[0076] Example 2

[0077] This embodiment provides a mask device, the structural schematic diagram of which is shown below. Figure 2 As shown, from Figure 2 As can be seen from the above, the mask device includes:

[0078] The support component assembly includes a support plate 1 and three slots 11, wherein two slots 11 are located on the edge of one side in the length direction of the support plate 1 and the other slot 11 is located on the edge of one side in the width direction. The cover plate assembly includes a hollow cover plate 2 and three positioning pins 21. The three positioning pins 21 and the three slots 11 cooperate to fix the hollow cover plate 2 to the support plate 1.

[0079] The support plate 1 is a 2mm thick stainless steel plate. The size of the support plate 1 is 5mm larger than the glass 3 to be coated, that is, the length and width of the support plate 1 are 5mm larger than the length and width of the glass 3 to be coated. The side of the support plate 1 that contacts the glass 3 to be coated is covered with anti-slip tape. The two slots 11 are made of polytetrafluoroethylene.

[0080] The hollow cover plate 2 is a 3mm thick double-piece cover plate. The upper cover plate is a 2.5mm thick aluminum alloy plate, and the lower cover plate is a 0.5mm thick polypropylene plate. One side of the inner frame area 22 of the hollow cover plate 2, namely... Figure 2 The irregular side of the inner frame area shown has a stepped structure (not shown in the figure). The step structure has a height of 0.5 mm and a width of 5 mm. The upper surface of the hollow cover plate 2, i.e. the upper surface of the upper cover plate, has been treated with an organosilane adhesion promoter. That is, a modified film layer is adhered to the upper surface of the hollow cover plate 2. The material of the modified film layer is organosilane adhesion promoter. The material of the positioning pin 21 is polytetrafluoroethylene.

[0081] The surface modification treatment includes: uniformly spraying an adhesion promoter solution containing 5 wt% organosilane adhesion promoter and 95 wt% propylene glycol methyl ether solvent onto the upper surface of the hollow cover plate; and then baking the cover plate in an oven at 150°C for 10 hours.

[0082] Example 3

[0083] This embodiment provides a mask device, the structural schematic diagram of which is shown below. Figure 3 As shown, from Figure 3 As can be seen from the above, the mask device includes:

[0084] The support component assembly includes a support plate 1 and two slots 11, wherein the two slots 11 are respectively disposed on two adjacent edges of the support plate 1. The cover plate assembly includes a hollow cover plate 2 and two positioning pins 21. The two positioning pins 21 and the two slots 11 cooperate to fix the hollow cover plate 2 to the support plate 1.

[0085] The support plate 1 is a 2mm thick stainless steel plate. The size of the support plate 1 is 5mm larger than the glass 3 to be coated, that is, the length and width of the support plate 1 are 5mm larger than the length and width of the glass 3 to be coated. The side of the support plate 1 that contacts the glass 3 to be coated is covered with anti-slip tape. The two slots 11 are made of polytetrafluoroethylene.

[0086] The hollow cover plate 2 is a 3mm thick PC board, and one side of the inner frame area 22 of the hollow cover plate 2 is... Figure 3 The irregular side of the inner frame area shown has a chamfer (not shown in the figure) with an angle of 45 degrees. The upper surface of the hollow cover plate 2 has been surface modified with a phosphate ester adhesion promoter, that is, a modified film layer is adhered to the upper surface of the hollow cover plate 2. The material of the modified film layer is a phosphate ester adhesion promoter. The material of the positioning pin 21 is polytetrafluoroethylene.

[0087] The surface modification treatment includes: uniformly spraying an adhesion promoter solution containing 4 wt% phosphate ester promoter and 96 wt% propylene glycol methyl ether onto the upper surface of the hollow cover plate; and then baking the cover plate in an oven at 150°C for 10 hours.

[0088] Example 4

[0089] This embodiment provides a masking method for coated glass, wherein the method is implemented using the masking device provided in Embodiment 1, and includes:

[0090] Step 1): Place the glass to be coated on the support plate, and then insert the positioning pin into the slot to fix the hollow cover plate to the support plate.

[0091] Step 2): Apply a coating to the glass to be coated;

[0092] Step 3): After the coating process is completed, pull out the positioning pin from the slot and remove the hollow cover plate to complete the coating and masking of the glass to be coated.

[0093] Example 5

[0094] This embodiment provides a masking method for coated glass, wherein the method is implemented using the masking device provided in Embodiment 2, and includes:

[0095] Step 1): Place the glass to be coated on the support plate, and then insert the positioning pin into the slot to fix the hollow cover plate to the support plate.

[0096] Step 2): Apply a coating to the glass to be coated;

[0097] Step 3): After the coating process is completed, pull out the positioning pin from the slot and remove the hollow cover plate to complete the coating and masking of the glass to be coated.

[0098] Example 6

[0099] This embodiment provides a masking method for coated glass, wherein the method is implemented using the masking device provided in Embodiment 3, and includes:

[0100] Step 1): Place the glass to be coated on the support plate, and then insert the positioning pin into the slot to fix the hollow cover plate to the support plate.

[0101] Step 2): Apply a coating to the glass to be coated;

[0102] Step 3): After the coating process is completed, pull out the positioning pin from the slot and remove the hollow cover plate to complete the coating and masking of the glass to be coated.

[0103] The data on the thinnest glass that can be masked, the positional fluctuation data during the masking process, and the ghost width data that can be obtained by the masking device provided in this embodiment of the invention and the existing conventional cover plate are shown in Table 1 below.

[0104] Table 1

[0105] Thinnest glass that can be masked Position fluctuation Ghost width Traditional cover plate 2mm ±2mm >3mm Example 1 0.5mm ±0.5mm 0.5mm Example 2 0.5mm ±0.5mm 0.5mm Example 3 0.5mm ±0.5mm 1mm

[0106] Note: Traditional cover plates consist only of the cover plate itself, and the cover plate and the glass to be coated are aligned and positioned by manual clamping.

[0107] As can be seen from Table 1, compared with traditional cover plates, Embodiments 4-6 utilize the masking devices provided in Embodiments 1-3 to mask the coated glass, successfully achieving coating and masking of thin glass with a thickness of 0.5mm. Furthermore, the positional fluctuation of the film removal is less than ±0.5mm, and the ghosting width is within 1mm. At the same time, the upper surface of the hollow cover plate (upper cover plate) of the masking device used in the embodiments has undergone surface modification treatment with an adhesion promoter, forming an adhesion film layer on the upper surface. This film cannot be removed even with tape, thus preventing the film coated on the cover plate from falling onto the glass to be coated with the sputtering gas flow. This avoids defects caused by cover plate flaking in the produced coated glass.

[0108] Furthermore, comparing the experimental data of the mask devices provided in Embodiment 1 and Embodiment 3, it can be seen that the ghost width of the mask device provided in Embodiment 1 is smaller, which indicates that the stepped structure is more conducive to improving mask performance than the chamfered structure.

[0109] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made within the scope of protection of this patent should still fall within the scope of this patent. Furthermore, the technical features, technical features and technical inventions, and technical inventions in this invention can be freely combined and used.

Claims

1. A masking device, characterized in that, The masking device includes a support assembly and a cover plate assembly. The support assembly includes a support plate and a slot disposed on the edge of the support plate. The cover plate assembly includes a hollow cover plate and a positioning pin. The positioning pin and the slot cooperate to fix the hollow cover plate to the support plate. The upper surface of the hollow cover plate is coated with a modified film layer, wherein the modified film layer is made of an adhesion promoter, and the adhesion promoter includes one or a combination of several of the following: organosilane adhesion promoter, organotitanic acid adhesion promoter, zircon adhesion promoter, zirconium aluminate adhesion promoter and phosphate ester adhesion promoter.

2. The masking device according to claim 1, characterized in that, The support plate is a 2-6mm thick sheet material.

3. The masking device according to claim 1 or 2, characterized in that, The support plate includes aluminum plate, aluminum alloy plate, stainless steel plate, acrylic plate or PC plate.

4. The masking device according to claim 1 or 2, characterized in that, The side of the support plate facing the hollow cover plate is covered with anti-slip tape.

5. The masking device according to claim 1 or 2, characterized in that, The materials of the slot and the positioning pin include one of polymethyl methacrylate, polybutylene terephthalate, polyphenylene ether resin, polycarbonate, polyamide, polytetrafluoroethylene, and polyphenylene ether.

6. The masking device according to claim 1, characterized in that, The thickness of the hollow cover plate is 2-6mm.

7. The masking device according to claim 1, characterized in that, The hollow cover plate includes a single-piece cover plate or a double-piece cover plate.

8. The masking device according to claim 7, characterized in that, The single-piece cover plate includes aluminum plate, aluminum alloy plate, stainless steel plate, acrylic plate or PC plate.

9. The masking device according to claim 7 or 8, characterized in that, The inner frame area of ​​the single-piece cover plate has rounded corners, beveled corners, or stepped structures on any one or more sides.

10. The masking device according to claim 9, characterized in that, The radius of the rounded corner is 2-8mm, the angle of the bevel is 30°-60°, and the height of the step structure is 0.3-1mm.

11. The masking device according to claim 7, characterized in that, The double-piece cover plate is made of an upper cover plate and a lower cover plate glued together. The lower cover plate includes one of stainless steel plate, aluminum alloy plate, polytetrafluoroethylene plate, polyethylene plate and polypropylene plate. The upper cover plate includes one of aluminum alloy plate, polyethylene terephthalate plate, polyethylene plate and polypropylene plate.

12. The masking device according to claim 11, characterized in that, The thickness of the lower cover plate is 0.3-1mm, and the thickness of the upper cover plate is 2-5mm.

13. The masking device according to claim 7, characterized in that, The inner frame area of ​​the double-piece cover plate has a stepped structure on one or more sides.

14. The masking device according to claim 11 or 12, characterized in that, The width of the inner frame area of ​​the lower cover plate is 3-5mm smaller than the width of the inner frame area of ​​the upper cover plate.

15. The masking device according to claim 1, characterized in that, When the sampling length is 0.08 mm, the surface roughness of the upper surface of the hollow cover plate is 10-75 μm.

16. The masking device according to claim 1, characterized in that, Methods for preparing modified films include: Step (1): Spray the adhesion promoter solution evenly onto the upper surface of the hollow cover plate; Step (2): Bake the cover plate obtained in step (1). After baking, the modified film layer is adhered to the upper surface of the hollow cover plate.

17. The masking device according to claim 16, characterized in that, The adhesion promoter solution contains 1-10 wt% adhesion promoter and 90-99 wt% solvent, based on a total weight of 100%.

18. The masking device according to claim 16, characterized in that, The baking is performed in an oven at 80-180°C for 8-16 hours, or by baking with a flame at a temperature of 800-1500°C.

19. A masking method for coated glass, characterized in that, The method is implemented using the mask device according to any one of claims 1-18, and includes: Step 1): Place the glass to be coated on the support plate, and then insert the positioning pin into the slot to fix the hollow cover plate to the support plate. Step 2): Apply a coating to the glass to be coated; Step 3): After the coating process is completed, pull out the positioning pin from the slot and remove the hollow cover plate to complete the coating and masking of the glass to be coated.

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