Microwave-shielding coated glass, and home appliance door assembly to which same is applied

Abstract

The present invention relates to a novel microwave-shielding coated glass which can prevent leakage of electromagnetic waves such as microwaves and ensure visibility of a front glass formed on a home appliance door and which is manufactured by a relatively simple method. The microwave-shielding coated glass of the present invention comprises a laminate structure in which transparent conductive oxide (TCO) layers and metal layers are alternately laminated, and has a microwave shielding performance of less than -35 dB.

Description

Microwave shielding coated glass and door assembly for home appliances using the same

[0001] The present invention relates to microwave shielding coated glass and a door assembly for home appliances using the same, and more specifically, to a novel microwave shielding coated glass that maintains improved electromagnetic wave shielding performance while also ensuring visibility, and a door assembly for home appliances using the same.

[0002] Unlike cooking appliances that use heat conduction or heat radiation, home appliances such as microwave ovens and microwave ovens cook food by irradiating electromagnetic waves onto the food, resulting in dielectric heating caused by the translational motion of water molecules contained in the food.

[0003] At this time, the electromagnetic waves can quickly heat food, but if they leak outside the cooking room, the cooking efficiency of the home appliance may be reduced, and in particular, the user's body may be damaged by electromagnetic waves that are harmful to the human body.

[0004] Several technologies are known for shielding these electromagnetic waves. One technology involves applying a porous plate to the door of an appliance to shield electromagnetic waves. However, the porous plate is made of thick metal and has holes spaced at regular intervals to shield electromagnetic waves. The structure of this porous plate reduces the visibility of the front glass of the appliance.

[0005] Additionally, a technology for shielding electromagnetic waves using a mesh-structured metal wire is known. The metal wire has a width of 100 nm to 30 μm, which can ensure visibility compared to the porous plate described above. However, to create a mesh structure of metal wire, a pattern must be formed through an exposure-development-etching-peeling process. Accordingly, the metal wire mesh structure involves a very complex and costly process. Furthermore, the metal wire mesh structure can easily peel off, which can cause electromagnetic wave leakage, and electromagnetic waves can also be concentrated at a defective area, which can cause a fire.

[0006] Accordingly, there is a need for a microwave shielding coating that has excellent electromagnetic shielding performance while ensuring visibility and can be manufactured using a relatively simple method, and a door assembly for home appliances using the same.

[0007]

[0008] The purpose of the present invention is to provide a novel microwave shielding coated glass capable of preventing leakage of electromagnetic waves such as microwaves.

[0009] In addition, an object of the present invention is to provide a novel microwave shielding coated glass capable of securing visibility of the front glass formed on the door of a home appliance.

[0010] In addition, an object of the present invention is to provide a novel microwave shielding coated glass that can be manufactured using a relatively simple method.

[0011] In addition, the purpose of the present invention is to provide a novel microwave shielding coated glass that ensures reliability even at the operating temperature of a home appliance.

[0012] The objectives of the present invention are not limited to those mentioned above. Other objectives and advantages of the present invention not mentioned above can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the objectives and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0013]

[0014] To address the aforementioned technical challenges, the present invention maximizes microwave reflectivity by applying a material with high electrical conductivity and low resistance, thereby realizing superior shielding performance. Furthermore, the present invention achieves high visible light transmittance by applying a transparent conductive oxide layer with an energy band gap of 3.26 eV or higher together with a metal layer to ensure visibility. Furthermore, the present invention maximizes visibility while achieving superior microwave shielding performance by applying a multilayer of transparent conductive oxide and metal layers.

[0015] Specifically, the microwave shielding coated glass of the present invention includes a glass substrate and a laminated structure formed on one side of the glass substrate in which a TCO (Transparent Conductive Oxide) layer and a metal layer are alternately laminated, and has a microwave shielding performance of less than -35 dB.

[0016] Here, the TCO layer may include at least one of ITO (In2O3, SnO2), IZO (In2O3, ZnO), FTO (F doped SnO2), and ZnO, and the metal layer may include at least one of Ag, Cu, and Au.

[0017] Preferably, the laminated structure may include any one of the structures below.

[0018] [structure]

[0019] TCO layer / metal layer / TCO layer

[0020] TCO layer / metal layer / TCO layer / metal layer / TCO layer

[0021] TCO layer / metal layer / TCO layer / metal layer / TCO layer / metal layer / TCO layer / TCO layer

[0022] TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer

[0023] TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer

[0024] Metal layer / TCO layer / metal layer

[0025] Metal layer / TCO layer / Metal layer / TCO layer / Metal layer

[0026] Metal layer / TCO layer / Metal layer / TCO layer / Metal layer / TCO layer / Metal layer

[0027]

[0028] Additionally, the thickness of the TCO layer may be 20 to 1000 nm, and the thickness of the metal layer may be 5 to 100 nm.

[0029] In addition, the microwave shielding coating of the present invention may further include a metal oxide layer formed on top of the laminated structure, and the metal oxide layer may have a refractive index of 1.0 or more. At this time, the metal oxide layer may include at least one of SiO2, TiO2, Y2O3, Ta2O5, Bi2O3, Nb2O5, SiO, ZnS, CeO2, MoO3, SnO2, and WO3.

[0030] In addition, the microwave shielding coating of the present invention may further include a protective layer formed on top of the metal oxide layer, and the protective layer may include at least one of SiN, SiON, Si3N4, TiO2, NiCr, and ZnO.

[0031] In addition, the microwave shielding coating of the present invention may have an electromagnetic shielding performance of less than -35 dB.

[0032]

[0033] Next, a door assembly for a home appliance of the present invention comprises a door panel; a front glass disposed on a front side of the door panel; and a door frame disposed on a rear side of the door panel; and a microwave shielding coated glass disposed between the door panel and the door frame; wherein a microwave shielding coating including a laminated structure in which a TCO (Transparent Conductive Oxide) layer and a metal layer are alternately laminated is formed on one side of the electromagnetic wave shielding glass, and the microwave shielding performance of the microwave shielding coated glass is less than -35 dB.

[0034] In addition, a door assembly for a home appliance according to another embodiment of the present invention may further include a second microwave shielding coated glass positioned between the door panel and the front glass, and a microwave shielding coating including a laminated structure in which a TCO (Transparent Conductive Oxide) layer and a metal layer are alternately laminated is formed on one side of the second microwave shielding coated glass, and the microwave shielding performance of the microwave shielding coated glass is less than -35 dB.

[0035]

[0036] According to the present invention, a novel microwave shielding coating capable of shielding electromagnetic waves such as microwaves can be provided.

[0037] In addition, the present invention can provide a novel microwave shielding coating capable of securing visibility of the front glass formed on the door of a home appliance.

[0038] In addition, the present invention can provide a novel microwave shielding coating that can be manufactured using a relatively simple method.

[0039] In addition, the present invention can provide a novel microwave shielding coating that ensures reliability even at the operating temperature of a home appliance.

[0040] In addition to the effects described above, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

[0041]

[0042] FIG. 1 is an exploded perspective view of a door assembly for a home appliance according to one embodiment of the present invention.

[0043] Figure 2 is an exploded perspective view of a door assembly according to another embodiment of the present invention.

[0044]

[0045] The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily practice the technical idea of ​​the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0046] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0047] Hereinafter, a microwave shielding coating according to the present invention and a door assembly for a home appliance to which the same is applied will be described in detail with reference to the drawings.

[0048]

[0049] Microwave shielding coating

[0050]

[0051] The microwave shielding coated glass of the present invention includes a glass substrate and a laminated structure in which a TCO (Transparent Conductive Oxide) layer and a metal layer are alternately laminated on one side of the glass substrate, and has a microwave shielding performance of less than -35 dB.

[0052]

[0053] The present invention maximizes microwave reflectivity by applying a material with high electrical conductivity and low resistance, thereby achieving superior shielding performance. Furthermore, the present invention achieves high visible light transmittance by applying a TCO layer with an energy bandgap of 3.26 eV or higher, along with a metal layer, to ensure visibility. Furthermore, the present invention achieves superior microwave shielding performance while maximizing visibility by applying multiple layers of TCO and metal layers.

[0054]

[0055] First, the glass material mentioned above can be a general glass material used for doors for home appliances.

[0056]

[0057] Next, a laminated structure in which a TCO (Transparent Conductive Oxide) layer and a metal layer are alternately laminated on one side of the above glass substrate is described.

[0058] The TCO layer may be made of ITO (In2O3, SnO2), IZO (In2O3, ZnO), FTO (F doped SnO2), hard low-e (Low-ε) material, soft low-e (Low-ε) material, etc. Preferably, the TCO layer may include at least one of ITO (In2O3, SnO2), IZO (In2O3, ZnO), FTO (F doped SnO2), and ZnO.

[0059] The above TCO layer can be formed by a sputtering method. The TCO layer has excellent optical properties. However, the TCO layer has low microwave shielding performance.

[0060] Accordingly, in order to achieve excellent microwave shielding performance along with excellent optical properties, the microwave shielding coated glass of the present invention includes a laminated structure in which a TCO layer and a metal layer are alternately laminated.

[0061]

[0062] Here, it is preferable that the metal layer includes a metal with low resistivity. For this purpose, the metal layer may include at least one of Ag, Cu, and Au.

[0063] The above metal layer can also be formed by a sputtering method.

[0064]

[0065] Preferably, the laminated structure may include any one of the structures below.

[0066] [structure]

[0067] TCO layer / metal layer / TCO layer

[0068] TCO layer / metal layer / TCO layer / metal layer / TCO layer

[0069] TCO layer / metal layer / TCO layer / metal layer / TCO layer / metal layer / TCO layer / TCO layer

[0070] TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer

[0071] TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer

[0072] Metal layer / TCO layer / metal layer

[0073] Metal layer / TCO layer / Metal layer / TCO layer / Metal layer

[0074] Metal layer / TCO layer / Metal layer / TCO layer / Metal layer / TCO layer / Metal layer

[0075]

[0076] Here, the thickness of the TCO layer may be 20 to 1000 nm. Here, if the thickness of the TCO layer exceeds 1000 nm or is less than 20 nm, the light transmittance of the coating may be reduced. More preferably, the thickness of the TCO layer may be 30 to 500 nm.

[0077] Additionally, the thickness of the metal layer may be 5 to 100 nm. Here, if the thickness of the metal layer exceeds 100 nm or is less than 5 nm, the microwave shielding performance of the coating may be deteriorated. More preferably, the thickness of the metal layer may be 10 to 50 nm.

[0078]

[0079] In addition, the microwave shielding coating of the present invention may further include a metal oxide layer formed on top of the laminated structure, and the metal oxide layer may have a refractive index of 1.0 or more. As the metal oxide layer is positioned on top of the microwave shielding coating of the present invention, the optical properties of the coating of the present invention can be maximized.

[0080] For example, the metal oxide layer may include at least one of SiO2, TiO2, Y2O3, Ta2O5, Bi2O3, Nb2O5, SiO, ZnS, CeO2, MoO3, SnO2, and WO3. In addition, the metal oxide layer may also be formed by a sputtering method.

[0081] Also preferably, the microwave shielding coating of the present invention may further include a protective layer formed on top of the metal oxide layer. The protective layer may be formed on the outermost layer of the microwave shielding coating described above. Here, the protective layer prevents oxidation of the microwave shielding coating. The protective layer may have a thickness of 5 to 100 nm to exhibit anti-oxidation performance.

[0082]

[0083] For this purpose, the protective layer may include at least one of SiN, SiON, Si3N4, TiO2, NiCr, and ZnO. The protective layer may also be formed by a sputtering method.

[0084] Additionally, preferably, a layer having the same material as the materials forming the protective layer (at least one of SiN, SiON, Si3N4, TiO2, NiCr, and ZnO) may be randomly additionally formed between the TCO layer and the metal layer.

[0085]

[0086] The laminated structure including the above-described protective layer may include any of the structures below.

[0087] [structure]

[0088] Protective layer / TCO layer / metal layer / TCO layer / protective layer

[0089] Protective layer / TCO layer / Metal layer / TCO layer / Metal layer / TCO layer / Protective layer

[0090] Protective layer / TCO layer / Metal layer / TCO layer / Metal layer / TCO layer / Metal layer / TCO layer / Protective layer

[0091] Protective layer / TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer / protective layer

[0092] Protective layer / TCO layer / Metal layer / TCO layer / TCO layer / Metal layer / TCO layer / TCO layer / Metal layer / TCO layer / Protective layer

[0093] Protective layer / metal layer / TCO layer / metal layer / protective layer

[0094] Protective layer / metal layer / TCO layer / metal layer / TCO layer / metal layer / protective layer

[0095] Protective layer / metal layer / TCO layer / metal layer / TCO layer / metal layer / TCO layer / metal layer / protective layer

[0096]

[0097] Here, the microwave shielding coated glass of the present invention has a microwave shielding performance of less than -35 dB.

[0098] Here, the microwave refers to an electromagnetic wave having a wavelength in the ISM band. The wavelength of the ISM band refers to wavelengths of 13.553~13.567MHz / 26.975~27.283MHz / 40.66~40.70MHz / 433.05~433.79MHz / 902~928MHz / 2.4~2.48GHz / 5.725~5.875GHz / 24~24.25GHz / 61~61.5GHz / 122~123GHz / 244~246GHz. The microwave shielding performance can be measured by inserting microwave shielding coated glass in the middle of the waveguide and using a Network Analyzer (Agilent E5071C) to measure the microwave transmittance.

[0099] Additionally, shielding performance (dB) is expressed as a logarithmic value of the ratio of transmitted microwaves to incident microwaves. Since the transmitted wave through the shielding material is smaller than the incident wave, dB is expressed as a negative value.

[0100] The microwave shielding coated glass of the present invention has a microwave shielding performance of less than -35 dB at a wavelength of the ISM band.

[0101]

[0102] Door assembly for home appliances

[0103]

[0104] Next, the door assembly for a home appliance of the present invention will be described in detail.

[0105]

[0106] FIG. 1 is an exploded perspective view illustrating a door assembly (100) for a home appliance according to one embodiment of the present invention.

[0107] Referring to FIG. 1, a door assembly (100) for a home appliance according to the present invention includes a door panel (10); a front glass (11) disposed on a front side of the door panel (10); and a door frame (13) disposed on a rear side of the door panel (10); and a microwave shielding coated glass (14) disposed between the door panel (10) and the door frame (13); wherein a microwave shielding coating including a laminated structure in which a TCO (Transparent Conductive Oxide) layer and a metal layer are alternately laminated is formed on one surface of the microwave shielding coated glass (14), and the microwave shielding performance of the microwave shielding coated glass is less than -35 dB.

[0108]

[0109] The above door panel (10) is a panel-shaped configuration for installing a front glass (11). The front glass (11) is a portion forming the front of the door assembly and is made of glass. The door frame (13) is a configuration that functions as the body of the door assembly.

[0110]

[0111] The door assembly (100) for a home appliance of the present invention includes a microwave shielding coated glass (14) disposed between the door panel (10) and the door frame (13). The microwave shielding coated glass (14) can be coupled and fixed to the door panel (10). In addition, the microwave shielding coated glass (14) can be coupled and fixed to the door frame (13). In this case, the method of coupling the microwave shielding coated glass (14) with the door panel (10) or the door frame (13) is not particularly limited.

[0112] Here, the microwave shielding coating described above is formed on one side of the microwave shielding coated glass (14). Preferably, the microwave shielding coating described above may be formed on the back side of the microwave shielding coated glass (14). Of course, the microwave shielding coating described above may be formed on both sides of the microwave shielding coated glass (14).

[0113] As an example, the microwave shielding coating described above may be formed on the back surface of the microwave shielding coating glass (14), and a low-e coating may be formed on the front surface of the microwave shielding coating glass (14). The low-e coating may be formed by a sputtering method, like the microwave shielding coating.

[0114] In addition, it goes without saying that a low-ε coating or microwave shielding coating may be applied to any surface of the front glass (11).

[0115]

[0116] FIG. 2 is an exploded perspective view illustrating a door assembly (101) for a home appliance according to another embodiment of the present invention.

[0117] Referring to FIG. 2, a door assembly (101) for a home appliance according to the present invention may further include a second microwave shielding coated glass (14') positioned between the door panel (10) and the front glass (11); and a microwave shielding coating including a laminated structure in which a TCO (Transparent Conductive Oxide) layer and a metal layer are alternately laminated may be formed on one surface of the second microwave shielding coated glass (14'), and the microwave shielding performance of the microwave shielding coated glass may be less than -35 dB.

[0118] Here, the above-described microwave shielding coating is formed on one side of the second microwave shielding coated glass (14'). Preferably, the above-described microwave shielding coating may be formed on the back surface of the second microwave shielding coated glass (14'). Of course, the above-described microwave shielding coating may be formed on both sides of the second microwave shielding coated glass (14').

[0119] As an example, the microwave shielding coating described above may be formed on the back surface of the second microwave shielding coating glass (14'), and a low-e coating may be formed on the front surface of the second microwave shielding coating glass (14'). The low-e coating may be formed by a sputtering method, like the microwave shielding coating.

[0120] In addition, referring to FIG. 2, the door assembly (101) for a home appliance of the present invention may further include a choke panel (15) on the back surface of the door frame (13). The choke panel (15) can further prevent leakage of microwaves and electromagnetic waves.

[0121]

[0122] The microwave shielding coating formed on one surface of the above microwave shielding coating glass (14) or the second microwave shielding coating glass (14') is as described above.

[0123]

[0124] As described above, the door assembly for a home appliance of the present invention can prevent microwave leakage by utilizing a microwave shielding coated glass positioned within the structure. As previously mentioned, the microwave shielding coating can be applied to either the front glass or the back glass. However, the front glass or the back glass may have a high surface temperature, which may reduce the reliability of the microwave shielding coating. Therefore, it is more preferable to use an intermediate glass positioned within the front glass and the back glass as the microwave shielding coated glass. As in the embodiment of the present invention, a plurality of intermediate glasses may be applied.

[0125]

[0126] Preferably, the microwave leakage of the door assembly is 0.8 mW / cm 2 It may be less than or equal to 0.75 mW / cm. More preferably, the microwave leakage of the door assembly is less than or equal to 0.75 mW / cm. 2 It could be as follows:

[0127] As described above, the microwave refers to an electromagnetic wave having a wavelength in the ISM band. The wavelengths in the ISM band refer to wavelengths of 13.553~13.567MHz / 26.975~27.283MHz / 40.66~40.70MHz / 433.05~433.79MHz / 902~928MHz / 2.4~2.48GHz / 5.725~5.875GHz / 24~24.25GHz / 61~61.5GHz / 122~123GHz / 244~246GHz. The leakage amount of the microwave can be measured by a microwave radiation emission test using a Microwave Measurement System (Holaday HI-1710A).

[0128] The door assembly of the present invention has a microwave leakage of 0.8 mW / cm at a wavelength of the ISM band. 2 It could be as follows:

[0129]

[0130] <Example>

[0131] The present invention is described below based on preferred embodiments. However, the present invention is not limited to the embodiments.

[0132]

[0133] 1. Example 1

[0134] A glass substrate was prepared, and a microwave shielding coating having a laminated structure in which a TCO layer / metal layer / TCO layer were sequentially deposited on one side of the glass substrate was formed.

[0135] The above measurement process was performed by PVD method using Magnetron Sputtering System (SNTEK-12SN048).

[0136] The TCO layer was formed using ITO. The thickness of the TCO layer was controlled to 40 nm.

[0137] Additionally, the metal layer was formed using Ag. The thickness of the metal layer was controlled to 10 nm.

[0138]

[0139] 2. Example 2

[0140] A glass substrate was prepared, and a microwave shielding coating having a laminated structure in which a TCO layer / metal layer / TCO layer were sequentially deposited on both sides of the glass substrate was formed.

[0141] The microwave shielding coating according to Example 2 is the same as that of Example 1 described above.

[0142]

[0143] 3. Example 3

[0144] A glass substrate was prepared, and a microwave shielding coating having a laminated structure in which a TCO layer / metal layer / TCO layer / metal layer / TCO layer was sequentially deposited on one side of the glass substrate was formed.

[0145] The above measurement process was performed by PVD method using Magnetron Sputtering System (SNTEK-12SN048).

[0146] The TCO layer was formed using ITO. The thickness of the TCO layer was controlled to 40 nm.

[0147] Additionally, the metal layer was formed using Ag. The thickness of the metal layer was controlled to 10 nm.

[0148]

[0149] 4. Example 4

[0150] A glass substrate was prepared, and a microwave shielding coating having a laminated structure in which a TCO layer / metal layer / TCO layer / metal layer / TCO layer was sequentially deposited on both sides of the glass substrate was formed.

[0151] The microwave shielding coating according to Example 4 is the same as that of Example 3 described above.

[0152]

[0153] 5. Examples 5-10

[0154] Examples 5 to 10 were manufactured in the same manner as the above-described examples, and the specific details are as shown in Table 1 below.

[0155]

[0156] ExampleLaminated structure (thickness (nm))TCO layer materialMetal layer materialCoating position5TCO(40) / Metal layer(10) / TCO(40)ITOCuSingle side6TCO(40) / Metal layer(10) / TCO(40)ITOAuSingle side7TCO(40) / Metal layer(10) / TCO(40)IZOAgSingle side8TCO(40) / Metal layer(10) / TCO(40)FTOAgSingle side9TCO(40) / Metal layer(10) / TCO(40) / Metal layer(10) / TCO(40)ITOCuSingle side10TCO(40) / Metal layer(10) / TCO(40) / Metal layer(10) / TCO(40)ITOAuDouble side

[0157]

[0158] <Experimental Example>

[0159] 1. Microwave leakage assessment

[0160] Using the embodiments described above, a door assembly having the shape shown in Fig. 1 was manufactured.

[0161] Microwave refers to electromagnetic waves with wavelengths in the ISM band. The wavelengths in the ISM band are 13.553~13.567MHz / 26.975~27.283MHz / 40.66~40.70MHz / 433.05~433.79MHz / 902~928MHz / 2.4~2.48GHz / 5.725~5.875GHz / 24~24.25GHz / 61~61.5GHz / 122~123GHz / 244~246GHz.

[0162] Microwave leakage was evaluated by measuring the leakage of microwaves having a wavelength in the ISM band. The microwave leakage was measured by a microwave radiation emission test using a Microwave Measurement System (Holaday HI-1710A).

[0163]

[0164] 2. Microwave shielding performance evaluation

[0165] Microwave shielding performance was evaluated for the above-described examples.

[0166] Microwave refers to electromagnetic waves with wavelengths in the ISM band. The wavelengths in the ISM band are 13.553~13.567MHz / 26.975~27.283MHz / 40.66~40.70MHz / 433.05~433.79MHz / 902~928MHz / 2.4~2.48GHz / 5.725~5.875GHz / 24~24.25GHz / 61~61.5GHz / 122~123GHz / 244~246GHz.

[0167] The microwave shielding performance was evaluated by measuring the microwave transmittance of the above examples. The microwave transmittance was measured by inserting the example sample into the middle of the waveguide and using a Network Analyzer (Agilent E5071C).

[0168]

[0169] 3. Visibility Evaluation

[0170] Light transmittance was measured using UV-Vis-NIR (Agilent Cary 5000) under a light source in the 555 nm wavelength range, and visibility was evaluated based on this.

[0171]

[0172] 4. Heat resistance evaluation

[0173] The heat resistance was evaluated by leaving the example samples in a chamber at 220°C for 300 hours and then checking whether there was any deterioration in the light transmittance and microwave and electromagnetic wave shielding performance of the example samples.

[0174]

[0175] 5. Evaluation Results

[0176] The results of the above-described evaluation are shown in Table 2.

[0177]

[0178] Example Microwave leakage amount (mW / cm) 2 )Microwave shielding performance (dB)Light transmittance (%)Heat resistance 10.75-38.559No degradation 20.05-58.271No degradation 30.74-40.261No degradation 40.02-63.178No degradation 50.75-37.658No degradation 60.75-36.459No degradation 70.75-38.157No degradation 80.75-37.358No degradation 90.74-38.558No degradation 100.02-58.177No degradation

[0179]

[0180] As described in Table 2, all embodiments of the present invention exhibit excellent microwave shielding performance and electromagnetic shielding performance. Furthermore, all embodiments of the present invention exhibit excellent light transmittance, ensuring visibility. Furthermore, all embodiments of the present invention exhibit excellent heat resistance at operating temperatures of microwave ovens or microwave ovens.

[0181]

[0182] Although the present invention has been described with reference to the drawings exemplified above, it is to be understood that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications may be made by those skilled in the art within the scope of the technical idea of ​​the present invention. Furthermore, even if the operational effects according to the configuration of the present invention have not been explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be acknowledged.

Claims

1. Glass substrate; and Located on one side of the above glass substrate, it includes a laminated structure in which a TCO (Transparent Conductive Oxide) layer and a metal layer are alternately laminated; Microwave shielding performance is less than -35 dB, Microwave shielding coated glass.

2. In paragraph 1, The above TCO layer Containing at least one of ITO (In2O3, SnO2), IZO (In2O3, ZnO), FTO (F doped SnO2) and ZnO Microwave shielding coated glass.

3. In paragraph 1, The above metal layer Containing at least one of Ag, Cu, and Au Microwave shielding coated glass.

4. In paragraph 1, The above laminated structure Contains any of the structures below Microwave shielding coated glass. [structure] TCO layer / metal layer / TCO layer TCO layer / metal layer / TCO layer / metal layer / TCO layer TCO layer / metal layer / TCO layer / metal layer / TCO layer / metal layer / TCO layer / TCO layer TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer Metal layer / TCO layer / metal layer Metal layer / TCO layer / Metal layer / TCO layer / Metal layer Metal layer / TCO layer / Metal layer / TCO layer / Metal layer / TCO layer / Metal layer 5. In paragraph 1, The thickness of the above TCO layer is 20 to 1000 nm, The thickness of the above metal layer is 5 to 100 nm, Microwave shielding coated glass.

6. In paragraph 1, Further comprising a metal oxide layer formed on top of the above laminated structure, The above metal oxide layer has a refractive index of 1.0 or more. Microwave shielding coated glass.

7. In paragraph 6, Further comprising a protective layer formed on top of the metal oxide layer Microwave shielding coated glass.

8. In paragraph 7, The above protective layer Containing at least one of SiN, SiON, Si3N4, TiO2, NiCr, and ZnO Microwave shielding coated glass.

9. In paragraph 6, The above metal oxide layer Containing at least one of SiO2, TiO2, Y2O3, Ta2O5, Bi2O3, Nb2O5, SiO, ZnS, CeO2, MoO3, SnO2 and WO3, Microwave shielding coated glass.

10. Door panel; Front glass arranged on the front of the door panel; and A door frame disposed on the rear surface of the door panel; A microwave shielding coated glass disposed between the door panel and the door frame; On one side of the above microwave shielding coated glass, a microwave shielding coating including a laminated structure in which a TCO (Transparent Conductive Oxide) layer and a metal layer are alternately laminated is formed, The microwave shielding performance of the above microwave shielding coated glass is less than -35 dB. Door assembly for home appliances.

11. In paragraph 10, Further comprising a second microwave shielding coated glass positioned between the door panel and the front glass; On one side of the second microwave shielding coated glass, a microwave shielding coating including a laminated structure in which a TCO (Transparent Conductive Oxide) layer and a metal layer are alternately laminated is formed, The microwave shielding performance of the above microwave shielding coated glass is less than -35 dB. Door assembly for home appliances.

12. In paragraph 8, The above microwave shielding coating Formed on both sides of the above microwave shielding coated glass Door assembly for home appliances.

13. In paragraph 10, The above TCO layer Containing at least one of ITO (In2O3, SnO2), IZO (In2O3, ZnO), FTO (F doped SnO2) and ZnO Door assembly for home appliances.

14. In paragraph 10, The above metal layer Containing at least one of Ag, Cu, and Au Door assembly for home appliances.

15. In paragraph 10, The above laminated structure Contains any of the structures below Door assembly for home appliances. [structure] TCO layer / metal layer / TCO layer TCO layer / metal layer / TCO layer / metal layer / TCO layer TCO layer / metal layer / TCO layer / metal layer / TCO layer / metal layer / TCO layer / TCO layer TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer / TCO layer / metal layer / TCO layer Metal layer / TCO layer / metal layer Metal layer / TCO layer / Metal layer / TCO layer / Metal layer Metal layer / TCO layer / Metal layer / TCO layer / Metal layer / TCO layer / Metal layer 16. In paragraph 10, The thickness of the above TCO layer is 20 to 1000 nm, The thickness of the above metal layer is 5 to 100 nm, Door assembly for home appliances.

17. In paragraph 10, The above microwave shielding coating Further comprising a metal oxide layer formed on top of the above laminated structure, The above metal oxide layer has a refractive index of 1.0 or more. Door assembly for home appliances.

18. In paragraph 17, Further comprising a protective layer formed on top of the metal oxide layer Door assembly for home appliances.

19. In paragraph 18, The above protective layer Containing at least one of SiN, SiON, Si3N4, TiO2, NiCr, and ZnO Door assembly for home appliances.

20. In paragraph 17, The above metal oxide layer Containing at least one of SiO2, TiO2, Y2O3, Ta2O5, Bi2O3, Nb2O5, SiO, ZnS, CeO2, MoO3, SnO2 and WO3, Door assembly for home appliances.

21. In paragraph 10, Microwave leakage is 0.8 mW / cm 2 Lee Ha-in Door assembly for home appliances.

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