Vehicle glass and manufacturing method therefor

Abstract

A vehicle glass according to an embodiment of the present disclosure may comprise: a first glass pane; a second glass pane disposed to face the first glass pane; and a metal layer which is provided on one surface, of the first glass pane, facing the second glass pane, and which has a patterned transmission part provided in a partial region thereof such that radio waves incident through the one surface thereof are transmitted and refracted through the first glass pane.

Description

Automotive glass and its manufacturing method

[0001] This disclosure claims the benefit of priority to Korean Patent Application No. 10-2023-0156499, filed November 13, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to glass for vehicles and a method for manufacturing the same.

[0003] As wireless communication services become more common both inside and outside vehicles, glass is being developed to support these services. For example, there is a growing demand for easy radio communication between in-vehicle terminal devices, such as the Electronic Toll Collection System (ETCS), the vehicle toll payment system, E-Call (Emergency Call), the traffic accident emergency reporting system, and the Global Navigation Satellite System (GNSS) and radio communication between users' portable electronic devices.

[0004] To this end, vehicle glass may require radio-transparent windows to facilitate radio communications for terminal devices installed inside the vehicle. Meanwhile, vehicle glass may be provided with a metal coating layer to insulate the vehicle interior. However, if a radio-transparent window is provided for radio communications for terminal devices, certain areas of the metal coating layer must be removed, resulting in certain areas of the vehicle glass not being insulated.

[0005] Accordingly, there is an increasing demand for a structure of vehicle glass that allows radio wave transmission for radio communication of terminal devices, etc. while also improving insulation.

[0006] The problem to be solved by the present disclosure is to provide vehicle glass and a method for manufacturing the same, which improves radio communication of terminal devices and the like while also improving insulation, in order to solve the above-described problems.

[0007] A vehicle glass according to an embodiment of the present disclosure comprises a first glass plate, a second glass plate arranged to face the first glass plate, and a metal layer formed on one surface of the first glass plate facing the second glass plate, wherein a patterned transmission portion is provided in a portion of the surface so that radio waves incident through the one surface are refracted by passing through the first glass plate.

[0008] A method for manufacturing vehicle glass according to an embodiment of the present disclosure includes the steps of cutting coated glass having a metal layer, irradiating a laser toward the metal layer of the cut coated glass to form a pattern transmission portion, laminating a bonding film on the metal layer, and laminating a glass plate on the bonding film.

[0009] According to an embodiment of the present disclosure, the radio communication sensitivity of a terminal device or the like provided inside a vehicle can be improved.

[0010] According to an embodiment of the present disclosure, the insulating performance of vehicle glass can be improved, and thus the heat blocking performance of vehicle glass can be improved.

[0011] According to an embodiment of the present disclosure, the heating area of ​​the vehicle glass can be increased, thereby improving the heating performance of the vehicle glass.

[0012] FIG. 1 is a schematic diagram of a vehicle and vehicle glass according to one embodiment of the present disclosure.

[0013] FIG. 2 is a schematic diagram of a radio communication through vehicle glass according to one embodiment of the present disclosure.

[0014] FIG. 3 is a schematic diagram of a vehicle glass according to one embodiment of the present disclosure.

[0015] FIG. 4 is an exploded view of a vehicle glass according to one embodiment of the present disclosure.

[0016] FIG. 5 is an exploded view of a vehicle glass according to another embodiment of the present disclosure.

[0017] FIG. 6 is a schematic diagram of a pattern transmission portion according to one embodiment of the present disclosure.

[0018] FIG. 7 is a schematic diagram of a pattern transmission portion according to another embodiment of the present disclosure.

[0019] FIG. 8 and FIG. 9 are schematic diagrams showing a method for manufacturing vehicle glass according to one embodiment of the present disclosure.

[0020] FIGS. 10 and 11 are schematic diagrams showing another method for manufacturing vehicle glass according to one embodiment of the present disclosure.

[0021] FIG. 12 and FIG. 13 are drawings showing experimental examples and results for radio wave reception according to vehicle glass, low-E glass, and low-E glass provided with a radio wave transmitting window according to one embodiment of the present disclosure.

[0022] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. When designating components in each drawing, it should be noted that, where possible, identical components are given the same reference numerals, even if they appear in different drawings. Furthermore, when describing embodiments of the present invention, detailed descriptions of known components or functions will be omitted if they are deemed to hinder understanding of the embodiments of the present invention.

[0023] In this specification, the front-back, left-right, and up-down directions are referred to for convenience of explanation, and may be directions that are orthogonal to each other. In this specification, the horizontal direction and the vertical direction are referred to for convenience of explanation, and may be directions that are orthogonal to each other. However, these directions are determined relatively to the direction in which the vehicle glass is arranged, and the up-down direction may not necessarily mean the vertical direction. In this specification, the left side may be the -X direction indicated in the drawing, and the right side may be the X direction indicated in the drawing.

[0024] Additionally, terms including ordinal numbers such as “first,” “second,” etc. used herein may be used to describe various components, but the components are not limited by the terms, and the terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term “and / or” includes any combination of a plurality of related listed items or any item among a plurality of related listed items.

[0025] FIG. 1 is a schematic diagram of a vehicle (1) and vehicle glass (10) according to one embodiment of the present disclosure. FIG. 2 is a schematic diagram of a radio communication performed through vehicle glass (10) according to one embodiment of the present disclosure.

[0026] Referring to FIGS. 1 and 2, a vehicle (1) can transmit radio waves for communication between a terminal device provided inside the vehicle and the outside of the vehicle through vehicle glass (10). In the drawing, the vehicle glass (10) is depicted as facing the front of the vehicle (1), but is not limited thereto.

[0027] In particular, recently, as the Electronic Toll Collecting System (ETCS), which is a system that automatically pays tolls for vehicles (1), the Emergency Call (E-Call), which is a device that automatically notifies when a traffic accident occurs in a vehicle (1), the Global Navigation Satellite System (GNSS), which is a global satellite navigation system for navigation of the vehicle (1), and the user's portable electronic devices, etc. are installed inside the vehicle (1), the demand for improved transmission and reception sensitivity of radio waves penetrating the inside and outside of the vehicle (1) is increasing.

[0028] Accordingly, conventionally, it was necessary to provide a radio wave transmitting window for transmitting and receiving radio waves transmitted and received from the outside and inside of the vehicle glass (10) to the vehicle glass (10). The radio wave transmitting window can be understood as an opening in a metal layer provided on one side of a first glass plate of the vehicle glass (10) formed of laminated glass. Accordingly, the insulation performance of the vehicle glass (10) could be relatively deteriorated in a certain area of ​​the metal layer corresponding to the radio wave transmitting layer.

[0029] In the vehicle glass (10) according to the present disclosure, a microscopic opening (62, see FIG. 6) is formed in the metal layer (50, see FIG. 4) without providing a separate radio wave transmitting window, thereby improving the insulation performance of the vehicle glass (10) and also improving the radio wave transmission and reception sensitivity of the vehicle glass (10).

[0030] A patterned transmission portion (60) including the above-described opening portion (62) may be provided in a certain area of ​​the vehicle glass (10). The patterned transmission portion (60) may be positioned on the upper side of the vehicle glass (10), but is not limited thereto.

[0031] Radio waves incident through the pattern penetrating portion (60) can be refracted and reach various electronic devices inside the vehicle (1), and radio waves transmitted from electronic devices inside the vehicle (1) can also be refracted to the outside of the vehicle (1) through the pattern penetrating portion (60).

[0032] Below, vehicle glass (10) will be described in detail.

[0033] Fig. 3 is a schematic diagram of a vehicle glass (10) according to one embodiment of the present disclosure. Fig. 4 is an exploded view of a vehicle glass (10) according to one embodiment of the present disclosure.

[0034] Referring to FIGS. 3 and 4, the vehicle glass (10) may include a joining portion (11) extending along the periphery of the vehicle glass (10). The joining portion (11) may be a portion for joining to a body frame of a vehicle (1, see FIG. 1). The vehicle glass (10) may include a patterned transmission portion (60) provided in a portion of the vehicle glass so that radio waves are refracted by transmitting through the vehicle glass. Hereinafter, the patterned transmission portion (60) will be described in detail.

[0035] The vehicle glass (10) may include a first glass plate (20) and a second glass plate (40) arranged to face the first glass plate (20). The first glass plate (20) and the second glass plate (40) may be formed of flat glass, float glass, quartz glass, borosilicate glass, soda lime glass, and may be formed of polyethylene, polypropylene, polycarbonate, or polymethyl methacrylate. Each of the first glass plate (20) and the second glass plate (40) may have a thickness of 0.5 mm to 5.0 mm in the first direction (D1), but is not limited thereto.

[0036] The vehicle glass (10) may include a bonding film (30) that is provided between a first glass plate (20) and a second glass plate (40) to bond the first glass plate (20) and the second glass plate (40). The bonding film (30) may be made of PVB (Polyvinyl butyral), OCA (Optically Clear Adhesive), TPU (Thermoplastic Urethane), or EVA (Ethylene-vinyl acetate). The bonding film (30) may have a thickness of 0.38 mm to 1.5 mm in the first direction (D1), but is not limited thereto.

[0037] The vehicle glass (10) may include a metal layer (50) provided on one surface of the first glass plate (20) facing the second glass plate (40). The metal layer (50) may be provided on one surface of the first glass plate (20) facing the second glass plate (40) to insulate the outside and inside of the vehicle glass (10). The metal layer (50) may be provided as a dielectric film of the Ag and SiAlNx series or a protective film of TiO2 and other Ti, NiCr layers, and may also be provided as a TCO layer such as ITO, FTO, or ATO.

[0038] The metal layer (50) can be understood as a heat-generating coating layer that generates heat by resistance when voltage is applied. The metal layer (50) may have a surface resistance of 0.7 Ω / sq to 20.0 Ω / sq, but is not limited thereto.

[0039] A terminal (50a) that is electrically connected to the metal layer (50) and protrudes outward may be provided on the metal layer (50). When voltage is applied to the metal layer (50) using the terminal (50a), the metal layer (50) may emit heat due to the resistance of the metal layer (50), thereby resolving problems such as fogging of vehicle glass (10), thereby improving usability.

[0040] The pattern transmission portion (60) may be provided in a portion of the metal layer (50) so that radio waves incident through the surface of the first glass plate (20) facing the second glass plate (40) are refracted by transmitting through the first glass plate (20).

[0041] In other words, a metal layer (50) may be laminated on one surface of a first glass plate (20) facing the first direction (D1), a bonding film (30) may be laminated in the first direction (D1) of the metal layer (50), and a second glass plate (40) may be laminated in the first direction (D1) of the bonding film (30). That is, the bonding film (30) may be provided between the metal layer (50) and the second glass plate (40).

[0042] Meanwhile, in FIG. 4, the second glass plate (40) is positioned in front of the first glass plate (20), but this is not limited thereto, and as in FIG. 5 described later, the first glass plate (20) may be positioned in front of the second glass plate (40).

[0043] FIG. 5 is an exploded view of a vehicle glass (110) according to another embodiment of the present disclosure. The vehicle glass (110) may include a first glass plate (120), a second glass plate (140) positioned to face the first glass plate (120), a bonding film (130) provided between the first glass plate (120) and the second glass plate (140), and a metal layer (150) provided between the first glass plate (120) and the bonding film (130). A portion of the metal layer (150) may be provided as a pattern transmission portion (160).

[0044] A bonding film (130) can be laminated in the first direction (D1) of a second glass plate (140) of a vehicle glass (110), a metal layer (150) can be laminated in the first direction (D1) of the bonding film (130), and a first glass plate (120) can be laminated in the first direction (D1) of the metal layer (150).

[0045] FIG. 6 is a schematic diagram of a pattern transmission portion (60) according to one embodiment of the present disclosure.

[0046] Referring to FIG. 6, the pattern transmission portion (60) may include a metal insulating portion (61) and an opening portion (62) having a structure smaller than the wavelength of the radio wave incident on the vehicle glass (10). The metal insulating portion (61) may be a part of a metal layer (50, see FIG. 4) and may be configured to be attached to a surface of the first glass plate (20) facing the second glass plate (40) so as to insulate the inside of the first glass plate (20) from the outside of the first glass plate (20). The opening portion (62), as will be described later, may be formed adjacent to the metal insulating portion (61) by being cut from the metal layer (50) by irradiation with a laser or the like.

[0047] More specifically, the metal insulating portion (61) may be the remaining area of ​​the metal layer (50) of the pattern transmitting portion (60) excluding the opening (62). In other words, radio waves incident on the vehicle glass (10) may be refracted through the opening (62) and then incident on the first glass plate (20) and reach electronic devices inside the vehicle (1).

[0048] For example, the metal insulation part (61) may include a first metal pattern (61a) formed in a grid pattern and a second metal pattern (61b) arranged to be surrounded by the first metal pattern (61a). The second metal pattern (61b) may be formed in a square shape, but is not limited thereto, and may also be formed in a polygonal shape or a circular shape.

[0049] The opening (62) may be provided so as to surround the second metal pattern (61b) between the first metal pattern (61a) and the second metal pattern (61b). That is, the extension direction of the opening (62) may be adjusted depending on the direction in which the laser is irradiated on the metal layer (50). As shown in FIG. 6, the opening (62) may be provided so as to extend along the perimeter of a square, and thus, one surface of the first glass plate (20, see FIG. 4) facing the second glass plate (40) may be exposed through the opening (62). Accordingly, radio waves incident on the vehicle glass (10) through the opening (62) may be refracted and guided toward an electronic device provided inside the vehicle (1).

[0050] The entire area of ​​the pattern penetration portion (60) can be formed with a horizontal length of 50 mm and a vertical length of 100 mm or a horizontal length of 100 mm and a vertical length of 300 mm, and the area ratio of the open portion (62) to the pattern penetration portion (60) can be 17% to 24%.

[0051] That is, the opening (62) can perform a role corresponding to a kind of lens role, and depending on the shape of the opening (62), radio waves can be adjusted to a specific location of the vehicle (1), so that the reception sensitivity of radio waves passing through the vehicle glass (10) can be improved.

[0052] In addition, the opening (62) is a structure smaller than the wavelength of the radio wave, so that the pattern transmission portion (60) may not be distinguished from the metal layer (50) from the user's perspective. Accordingly, the aesthetics of the vehicle glass (10) may be improved.

[0053] FIG. 7 is a schematic diagram of a pattern transmission portion (260) according to another embodiment of the present disclosure.

[0054] Referring to FIG. 7, the metal insulation portion (261) of the pattern transmission portion (260) may include a first metal pattern (261a) formed in a grid pattern shape and a second metal pattern (261b) arranged to be surrounded by the first metal pattern (261a).

[0055] The width of the first metal pattern (261a) may be smaller than the width of the first metal pattern (61a) of FIG. 6 described above. The second metal pattern (261b) may be formed in a circular shape with different sizes and provided between the first metal patterns (261a).

[0056] The second metal pattern (261b) may include, in order of size, a first sub-metal pattern (261ba) having a first size, a second sub-metal pattern (261bb) having a second size smaller than the first size, and a third sub-metal pattern (261bc) having a third size smaller than the second size.

[0057] The metal insulation portion (261) can also be understood as an area excluding an opening (262) formed by cutting from the metal layer (50) by laser irradiation, and the shape of the metal insulation portion (261) can be adjusted by adjusting the laser irradiation.

[0058] The entire area of ​​the pattern penetration portion (260) can be formed with a horizontal length of 50 mm and a vertical length of 100 mm, or a horizontal length of 100 mm and a vertical length of 300 mm, and the area ratio of the open portion (262) to the pattern penetration portion (260) can be 24% to 32%. That is, it is not limited to the shape of the pattern penetration portion (60) or the pattern penetration portion (260), and during the design process, the area ratio of the open portion (62, 262) to the pattern penetration portion (60, 260) is set as a parameter so that various shapes of metal insulation portions (61, 261) can be prepared.

[0059] Also in Fig. 7, one side of the first glass plate (20, see Fig. 4) facing the second glass plate (40) can be exposed to the outside through the opening (262), and thereby, radio waves incident on the vehicle glass (10) can be refracted through the opening (262) and guided toward the electronic device provided inside the vehicle (1).

[0060] That is, the opening (262) can perform a role corresponding to a kind of lens role, and the effect thereof can be similar to that of the pattern transmission portion (260).

[0061] FIGS. 8 and 9 are schematic diagrams illustrating a method for manufacturing vehicle glass (10) according to one embodiment of the present disclosure. Referring to FIGS. 8 and 9, a method for manufacturing vehicle glass (10) using a flat glass processing method will be described.

[0062] A method for manufacturing vehicle glass (10) using a flat glass processing method described below may include a step of cutting a coated glass (CG) provided with a first glass plate (20) and a metal layer (50), a step of irradiating a laser using a flat glass processing method toward the metal layer (50) of the cut coated glass (CG) to form a pattern transmission portion (60), and a step of printing a band region (21) on the coated glass (CG) on which the pattern transmission portion (60) is formed. The method for manufacturing vehicle glass (10) may then include a step of bending the first glass plate (20) and the metal layer (50) of the cut coated glass (CG) into a curved surface, a step of laminating a bonding film (30) on the metal layer (50) of the curved coated glass (CG), and a step of laminating a second glass plate (40) on the bonding film (30). The method for manufacturing vehicle glass (10) may include a step of bonding a first glass plate (20), a metal layer (50), a bonding film (30), and a second glass plate (40). Each step will be described in detail below. With respect to the step of cutting the coated glass (CG) comprising the first glass plate (20) and the metal layer (50), a certain area may be cut in the coated glass (CG) to obtain the first glass plate (20). At this time, a metal layer (50) may be provided on one surface of the first glass plate (20).

[0063] Thereafter, a step of forming a pattern transmission portion (60) by irradiating a laser toward the metal layer (50) of the cut coated glass (CG) using a flat glass processing method may be performed. That is, a laser may be irradiated toward a certain area of ​​the metal layer (50) using a laser apparatus (LA) using a flat glass laser processing method. According to this method, the laser apparatus (LA) irradiates the laser to a desired area of ​​the metal layer (50) and can control the irradiation area of ​​the laser, etc., through a lens.

[0064] At this time, the laser may be equipped with Fiber, Nd:YAG, CO2, and the wavelength may be irradiated at 355 nm, 532 nm, or 1064 nm. If the wavelength range is exceeded, the error rate of the pattern transmission portion (60) may increase due to laser diffraction, and conversely, if the wavelength range is less than this, deformation of the first glass plate (20) may occur.

[0065] In addition, the output of the laser can be equipped with 10W, 20W, 60W, and 100W. If the output range is exceeded, the first glass plate (20) may be damaged, and if the output range is less than this, foreign substances caused by the laser may be formed on the metal insulating portion (61, 261) after scribing to mark the opening (62, 262).

[0066] The irradiation range of the laser may be 50 mm x 50 mm, 100 mm x 100 mm, or 200 mm x 200 mm, and the distance between the lens (not shown) of the laser device (LA) and the metal layer (50) may be set to 0.05 m to 2 m in the vertical direction of the metal layer (50). If the distance is set to be less than this range, it may be difficult to implement the opening (62, 262).

[0067] The line width of the laser can be set to 10 μm to 200 μm. If it exceeds this range, the opening (62, 262) of the pattern transmission section (60, 260) increases, which may result in a decrease in insulation performance. If it falls short of this range, it may take too long to implement an ultra-fine pattern of the pattern transmission section (60), which may result in a decrease in mass productivity.

[0068] In addition, the process speed of the laser device (LA) may be 200 mm / s to 800 mm / s. If it exceeds this range, the error rate of the opening (62, 262) may increase, and if it falls short of this range, mass productivity may decrease.

[0069] The laser device (LA) may be provided with a separate suction unit to suck up contamination to prevent contamination of the area being irradiated with the laser.

[0070] By adjusting the shape of the opening (62, 262) by adjusting the laser device (LA), a patterned transmission portion (60) can be formed on one surface of the first glass plate (20).

[0071] Thereafter, a band area (21) for joining to a body frame along the perimeter of the first glass plate (20) can be printed on the first glass plate (20). That is, a step of printing the band area (21) on a coated glass (CG) on which a pattern transmission portion (60) is formed can be performed.

[0072] Thereafter, a step of bending the first glass plate (20) and the metal layer (50) of the cut coated glass (CG) into a curved surface may be performed. That is, the first glass plate (20) having the band region (21) printed thereon and the metal layer (50) provided thereon may be installed in a mold (ML) inside a heating device (F) for bending into a curved surface, so that deformation may be caused in the first glass plate (20) and the metal layer (50) through the heating device (F). The mold (ML) inside the heating device (F) may be a structure for supporting the first glass plate (20) in order to deform the first glass plate (20) into a desired curvature.

[0073] Thereafter, a bonding film (30) can be laminated on the metal layer (50), and a second glass plate (40) can be laminated on the bonding film (30). That is, a step of laminating a bonding film (30) on the metal layer (50) of a curved coated glass (CG), and a step of laminating a second glass plate (40) on the bonding film (30) can be performed.

[0074] Thereafter, a step of bonding the first glass plate (20), the metal layer (50), the bonding film (30), and the second glass plate (40) can be performed. That is, when the first glass plate (20), the metal layer (50), the bonding film (30), and the second glass plate (40) are bonded at high temperature and high pressure in a high-pressure reaction vessel (autoclave, not shown), the manufacturing of the vehicle glass (10) can be completed.

[0075] FIGS. 10 and 11 are schematic diagrams illustrating another method for manufacturing vehicle glass (10) according to one embodiment of the present disclosure. Referring to FIGS. 10 and 11 , a method for manufacturing vehicle glass (10) using a curved glass processing method will be described. The specific details of the laser device (LA) herein may be the same as those described above.

[0076] A method for manufacturing vehicle glass (10) using a curved glass processing method described below may include a step of cutting a coated glass (CG) provided with a first glass plate (20) and a metal layer (50), a step of printing a band region (21) on the cut coated glass (CG), and a step of bending the first glass plate (20) and the metal layer (50) of the coated glass (CG) into a curved surface. The method for manufacturing vehicle glass (10) may then include a step of irradiating a laser using the curved glass processing method toward the bent metal layer (50) to form a pattern transmission portion (60). The method for manufacturing vehicle glass (10) may then include a step of laminating a bonding film (30) on the metal layer (50) on which the pattern transmission portion (60) is formed, and a step of laminating a second glass plate (40) on the bonding film (30). Thereafter, a step of bonding the first glass plate (20), the metal layer (50), the bonding film (30), and the second glass plate (40) may be included. Each step will be described in detail below.

[0077] A method for manufacturing vehicle glass (10) may include a step of cutting a coated glass (CG) provided with a first glass plate (20) and a metal layer (50). At this time, a certain area of ​​the coated glass (CG) may be cut to obtain a first glass plate (20) provided with a metal layer (50).

[0078] Afterwards, a step of printing a band area (21) on the cut coated glass (CG) is performed, so that a band area (21) for joining to a body frame along the perimeter of the first glass plate (20) can be printed on the first glass plate (20).

[0079] Thereafter, a step of bending the first glass plate (20) and the metal layer (50) of the coated glass (CG) into a curved surface may be performed. In more detail, the coated glass (CG) having a band region (21) printed thereon may be installed in a mold (ML) inside a heating device (F) for bending the first glass plate (20) and the metal layer (50) into a curved surface, so that deformation may occur in the first glass plate (20) through the heating device (F). The mold (ML) inside the heating device (F) may be a structure for supporting the first glass plate (20) in order to deform the first glass plate (20) into a desired curvature.

[0080] Thereafter, a step of forming a pattern transmission portion (60) by irradiating a laser toward the bent metal layer (50) using a curved glass processing method may be performed. In other words, a laser may be irradiated to the metal layer (50) provided on one surface of the bent first glass plate (20) using a laser device (LA) corresponding to the above-described structure. The pattern transmission portion (60) of the metal layer (50) may be formed by irradiating the laser to a desired shape or width. At this time, the structure for irradiating the laser to the already bent first glass plate (20) may be different from FIGS. 8 and 9.

[0081] Thereafter, a step of laminating a bonding film (30) on a metal layer (50) having a patterned transparent portion (60) formed thereon, and a step of laminating a second glass plate (40) on the bonding film (30) may be performed. In other words, a bonding film (30) may be bonded to a metal layer (50), and a second glass plate (40) may be laminated on the bonding film (30).

[0082] Thereafter, a step of bonding the first glass plate (20), the metal layer (50), the bonding film (30), and the second glass plate (40) can be performed. That is, when the first glass plate (20), the metal layer (50), the bonding film (30), and the second glass plate (40) are bonded at high temperature and high pressure in a high-pressure reaction vessel (autoclave, not shown), the manufacturing of the vehicle glass (10) can be completed.

[0083] FIG. 12 and FIG. 13 are drawings showing experimental examples and results for radio wave reception according to vehicle glass (10), low-E glass (10a), and low-E glass (10b) provided with a radio wave transmitting window according to one embodiment of the present disclosure.

[0084] Referring to FIGS. 12 and 13, it will be described that vehicle glass (10) according to one embodiment of the present disclosure has improved radio wave reception sensitivity compared to conventional low-E glass (10a) and low-E glass (10b) provided with a radio wave transmitting window. Low-E glass can be understood as glass that helps save energy by minimizing heat transfer by coating a metal oxide material on the glass surface.

[0085] Vehicle glass (10), low-E glass (10a), and low-E glass (10b) equipped with a radio wave transmitting window were tested in an anechoic chamber by laminating a metal layer on low-E glass formed with the same area of ​​300 mm in width and 300 mm in height.

[0086] More specifically, in an anechoic chamber, a radio transmitter may be provided on one side of each of the low-E glass (10a), the low-E glass (10b) provided with a radio wave transmitting window, and the vehicle glass (10), and a radio receiver may be provided on the other side of each of the low-E glass (10a), the low-E glass (10b) provided with a radio wave transmitting window, and the vehicle glass (10). As the radio receiver, a ZVA 67 Vector Network Analyzer from ROHDE&SCHWARZ was used.

[0087] Low-E glass (10a) is glass without removing the metal layer, low-E glass (10b) provided with a radio wave transmitting window is glass in which the area ratio of the radio wave transmitting window to the low-E glass (10b) is 34%, and vehicle glass (10) can be understood as glass in which the area ratio of the pattern transmitting portion (60) of the opening portion (62, 262) to the pattern transmitting portion is 24%.

[0088] Referring to Fig. 13, it can be confirmed that, compared to low-e glass (10a) and low-e glass (10b) provided with a radio wave transmitting window, vehicle glass (10) has a higher sensitivity for radio waves transmitted from a radio transmitter in the range of 2 to 6 GHz and received by a radio wave receiver, and is improved by about 3.2 dB.

[0089] In other words, compared to low-E glass (10b) provided with a radio-transmitting window, vehicle glass (10) can have an insulation performance that is about 10% better while reducing the area ratio of the opening (62, 262) by 10%.

[0090] The above description is merely an illustrative illustration of the technical idea of ​​the present invention, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the technical idea of ​​the present invention, and the scope of the technical idea of ​​the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

Claims

1. First glass plate; A second glass plate positioned so as to face the first glass plate; and A vehicle glass comprising: a metal layer formed on one surface of the first glass plate facing the second glass plate, the metal layer forming a pattern transmission portion provided in a portion of the surface so that radio waves incident through the one surface are refracted by passing through the first glass plate; 2. In paragraph 1, The above pattern penetration part is, A metal insulating member provided to insulate the inside of the first glass plate from the outside of the first glass plate; and A vehicle glass comprising an opening cut from the metal layer and formed adjacent to the metal insulating member.

3. In paragraph 2, The above metal insulation part, It comprises a first metal pattern formed in a grid shape and a second metal pattern arranged to be surrounded by the first metal pattern. A vehicle glass, wherein the opening extends between the first metal pattern and the second metal pattern to surround the second metal pattern.

4. In paragraph 3, The above second metal pattern is formed into a polygonal shape or a circular shape in vehicle glass.

5. In paragraph 1, A vehicle glass further comprising a terminal electrically connected to the metal layer and protruding outward.

6. In paragraph 1, A vehicle glass further comprising: a bonding film provided between the metal layer and the second glass plate.

7. Step of cutting the coated glass having a metal layer; A step of forming a pattern transmission portion by irradiating a laser toward the metal layer of the above-mentioned cut coating glass; A step of laminating a bonding film on the above metal layer; and A method for manufacturing vehicle glass, comprising: a step of laminating a glass plate onto the above-mentioned bonding film.

8. In paragraph 7, A method for manufacturing vehicle glass, wherein irradiating a laser toward a metal layer of the above-mentioned cut coated glass includes irradiating a laser using a flat glass laser processing method.

9. In paragraph 7, A method for manufacturing vehicle glass, further comprising: a step of bending the cut coated glass into a curved surface after forming the pattern penetration portion; 10. In paragraph 7, A method for manufacturing vehicle glass, wherein irradiating a laser toward a metal layer of the above-mentioned cut coated glass includes irradiating a laser by a curved glass laser processing method.

11. In paragraph 7, A method for manufacturing vehicle glass, further comprising: a step of bending the cut coated glass into a curved surface after cutting the coated glass; 12. In paragraph 7, A method for manufacturing vehicle glass, further comprising: a step of laminating a glass plate on the bonding film, and then bonding the coated glass, the bonding film, and the glass plate.

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