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    • 专利摘要:
    LOW-E COATED ITEM HAVING ABSORBING LAYERS FOR LOW REFLECTANCE ON THE FILM SIDE AND LOW TRANSMISSION ON THE VISIBLE. The absorbent layers of a low-emissivity (low-E) coating are designed to cause the coating to have a reduced film-side reflectance, which is advantageous for aesthetic purposes. In certain embodiments, the absorber layers are metallic or substantially metallic (e.g., NiCr or NiCrNx) and are positioned to reduce or prevent oxidation of the absorber layers during optional heat treatment (e.g., heat quench, heat folding, and/or thermal reinforcement). Articles coated in accordance with certain exemplary embodiments of this invention may be used in the context of insulating glass (IG) window units, other types of windows, etc.
    公开号:BR112015004927B1
    申请号:R112015004927-3
    申请日:2013-08-28
    公开日:2021-08-31
    发明作者:Bernd Disteldorf；Anton Dietrich；Piotr Kokot；Adam Tokarz
    申请人:Guardian Glass, LLC；
    IPC主号:
    专利说明:

    [0001] This invention relates to a coated article that includes a low emissivity (low-E) coating. In certain exemplary embodiments, the absorbent layers of the low-E coating are positioned/designed to cause the coating to have (i) either low visible transmission (eg, no more than 45%, more preferably no more than 40%, and even more preferably not more than 35%), (ii) as a reduced visible film-side reflectance. An upper absorbent layer can be provided in a top pile and another absorbent layer can be provided in a middle pile of the low-E coating. In certain exemplary embodiments, the absorbent layers are metallic or substantially metallic. The absorbing layer in the middle stack may be provided between the first and second layers of nitride (for example, layers based on silicon nitride), while the absorbing layer in the upper stack may be provided between a layer of nitride and a metallic or substantially metallic infrared (IR) reflective layer, to reduce or prevent oxidation of the absorber layers during optional thermal treatment (e.g., thermal quenching, thermal bending, and/or thermal reinforcement) and/or the fabrication of such mode allowing color and optical characteristics to be obtained. Articles coated in accordance with certain exemplary embodiments of this invention may be used in the context of insulating glass (IG) window units, vehicle windows, other types of windows, or in any other suitable application. BACKGROUND OF THE INVENTION
    [0002] Coated articles are known in the art for use in window applications such as insulating glass (IG) window units, vehicle windows, and/or the like. It is known that in certain situations, it is desirable to heat treat (e.g., heat temper, heat bend and/or heat reinforce) such coated articles for the purposes of tempering, bending, or the like, in certain situations of example. Heat treatment of coated articles typically requires the use of temperature(s) of at least 580 degrees C, more preferably at least about 600 degrees C and even more preferably at least 620 degrees C. Such high temperatures (for example, for 5-10 minutes or more) often cause coatings to decompose and/or deteriorate or change in an unpredictable way. Thus, it is desirable for coatings to be able to withstand such heat treatments (eg, heat quenching), if desired, in a predictable manner that does not significantly damage the coating.
    [0003] In certain situations, designers of coated articles work towards a combination of desirable visible transmission, desirable color, low emissivity (or emittance), and low sheet strength (Rs). The low emissivity (low-E) and low strength characteristics of the sheet allow such coated articles to block significant amounts of IR radiation so as to reduce, for example, unwanted heating of the vehicle or building interiors. Often, more IR radiation being blocked (including reflected) is accompanied by less visible transmission.
    [0004] U.S. Patent No. 7,597,965 discloses a low-E coating with a NiCr absorbing layer on the lower dielectric cell. However, the example coating in the '965 patent is designed for high visible transmission and, in fact, has a visible transmission (Tvis or TY) of 59%. Smaller visible broadcasts are often desirable. For example, it is often desirable for aesthetic and/or optical purposes to provide coated articles (including low-E coatings) having visible transmissions of no more than 45%, more preferably no more than 40%, and sometimes no more. than about 35%. However, when the visible transmission of a coated article is reduced through a low-E coating design, the reflectance on the film side of the coating typically increases.
    [0005] US Patent No. 7,648,769 discloses a low-E coating with a NiCr absorbing layer provided in the middle dielectric cell, but not in the upper and lower dielectric cells of the coating (see, for example, Figure 1 of the '769 patent. Example 1 in the '769 patent obtains, measured monolithically, a visible transmission of 54.5% and a film-side reflectance of 19.5%, and when measured in an insulating glass window unit ( IG), the values change to a visible transmission of 50% and a reflectance on the film side of 23%. Example 2 in the '769 patent has a greater visible transmission and obtains, measured monolithically, a visible transmission of 67.5% and a film-side reflectance of 11.5%, and when measured in a unit of In insulating glass (IG) windows, the values change to a visible transmission of 62% and a film-side reflectance of 17%. The examples in the '769 patent teach that when visible transmission drops, the film side reflectance rises.
    [0006] It will also be explained here, in the detailed description section, that providing an absorber layer given only in the middle dielectric cell of a low-E coating, having a visible transmission of about 40%, results in a undesirably high visible film-side reflectance (RfY) of above 30% (measured monolithically).
    [0007] Accordingly, it will be appreciated that it has been difficult to obtain coated articles, including low-E coatings, having a combination of both (i) desirably low visible transmission and (ii) low film-side reflectance . It will be apparent to those of skill in the art that there is a need in the art for a coated article having low emissivity (or low sheet strength) and a combination of both low visible transmission (e.g. not more than 45%, more preferably not more than about 40%, and more preferably still not more than about 35%) how much of the film-side reflectance is low BRIEF SUMMARY OF THE EXAMPLE MODES OF THE INVENTION
    [0008] A coated article includes a low-E coating. In certain exemplary embodiments, the absorbent layers in the Low-E coating are positioned/designed to make the Low-E coating have both (i) low visible transmission (eg no more than 45%, more preferably not more than 40%, and even more preferably not more than 35%), or (ii) low reflectance on the film side in the visible, which is advantageous for aesthetic purposes. An absorbent layer is to be provided in an upper stack of the low-E coating and another absorbent layer is provided in a middle stack of the low-E coating, and in certain double silver embodiments, no similar absorbent layer is provided in the Low-E coating bottom pile. Absorber layers are metallic or substantially metallic (eg NiCr or NiCrNx). In certain exemplary embodiments, the absorbent layer in the middle stack is provided between the first and second layers of nitride (e.g., layers based on silicon nitride), and the absorbent layer in the upper stack is provided between the layer. of nitride and the metallic or substantially metallic infrared (IR) reflective layer, to reduce or prevent oxidation of the absorbent layers during optional heat treatment (e.g., thermal, thermal bending, and/or thermal reinforcement) and/or fabrication, thereby allowing predictable color and optical characteristics to be obtained. It has been found that the use of such absorbent layers in the top and middle parts of the coating surprisingly and unexpectedly allows a combination of low visible transmission and low film side reflectance to be obtained simultaneously. Articles coated in accordance with certain exemplary embodiments of this invention may be used in the context of IG window units, vehicle windows, other types of windows, or in any other suitable application.
    [0009] In certain exemplary embodiments of this invention, a coated article is provided that includes a coating supported by a glass substrate, the coating comprising: first and second infrared (IR) reflective layers (e.g., of, or including, silver), where said IR-reflective layers are spaced apart from one another, and where the first IR-reflective layer is located closer to the glass substrate than is the second IR-reflective layer; a substantially metallic or metallic first absorption layer (e.g. of or including NiCr and/or NiCrNx) located such that the first absorption layer is located between the first and second IR-reflective layers, where the first absorption layer is sandwiched between and contacting first and second dielectric layers comprising silicon nitride; and a second substantially metallic or metallic absorption layer (e.g. of or including NiCr and/or NiCrNx) located such that both the first and second IR reflective layers are located between the glass substrate and the second absorption layer, where the second absorption layer is located between and contacting the second IR reflective layer and a third dielectric layer comprising silicon nitride. BRIEF DESCRIPTION OF THE DRAWINGS
    [00010] FIGURE 1 is a cross-sectional view of a coated article according to an exemplary embodiment of this invention.
    [00011] FIGURE 2 is a cross-sectional view showing the coated article of figure 1 provided in a unit of IG windows, according to an exemplary embodiment of this invention. DETAILED DESCRIPTION OF THE EXAMPLE MODES OF THE INVENTION
    [00012] The coated articles contained herein can be used in applications such as IG window units, vehicle windows, monolithic architectural windows, residential windows, and/or any other suitable application that includes single or multiple glass substrates.
    [00013] In certain exemplary embodiments of this invention, the coating includes a double silver stack (as shown in Figure 1), although this invention is not so limited in all situations.
    [00014] For example, in certain exemplary embodiments of this invention, heat-treated or non-heat-treated coated articles, having multiple IR reflective layers (for example, two separately spaced silver-based layers), are able to obtain a sheet strength (Rs) of less than or equal to 3.0 (more preferably less than or equal to 2.5, even more preferably less than or equal to 2.1, and more preferably still less than or equal to 2.0). The terms "thermal treatment" and "heat treatment", as used herein, mean to heat the article to a temperature sufficient to obtain thermal annealing, thermal bending, and/or thermal reinforcement of the article including the glass. This definition includes, for example, heating a coated article in an oven or furnace to a temperature of at least about 580 degrees C, more preferably at least about 600 degrees C, for a period sufficient to allow for tempering, folding. ra, and/or thermal reinforcement. In certain situations, the HT can be for at least about 4 or 5 minutes. The coated article may or may not be heat treated in different embodiments of this invention.
    [00015] Figure 1 is a cross-sectional view of a coated article according to a non-limiting exemplary embodiment of this invention. The coated article includes substrate 1 (e.g., clear, green, reddish-brown, or blue-green glass substrate of about 1.0 to 10.0 mm thick, more preferably from about 1.0 mm to 3.5 mm thick), and the low-E 30 coating (or layering system) provided over substrate 1, directly or indirectly. The coating (or layer system) 30 includes, for example: the background dielectric silicon nitride layer 3, which may be Si3N4, the Si-rich type for haze reduction, or any suitable stoichiometric silicon nitride in different embodiments of this invention, the first lower contact layer 7 (which contacts the bottom IR reflective layer 9), the first conductive infrared (IR) reflective layer is preferably metallic or substantially metallic 9, the first upper contact layer 11 (which contacts layer 9), dielectric layer 13, dielectric layer based on and/or comprising silicon nitride 14, metallic or substantially metallic absorbing layer 4 (e.g. of or including NiCr, NiCrNx, or similar), the additional 14' dielectric silicon nitride layer, which may be Si3N4, of the Si-rich type for turbidity reduction, or of any suitable stoichiometric silicon nitride, the interlayer based on, and/or q which comprises, tin oxide 15, the second lower contact layer 17 (which contacts the IR reflective layer 19), the conductive and preferably metallic or substantially metallic second IR reflective layer 19, the metallic or substantially metallic absorber layer 25 ( for example, of or including NiCr, NiCrNx, or similar), which is located over and contacting the upper IR reflective layer 19, and the protective dielectric silicon nitride layer 26, which may be Si3N4, of the type rich in Si for the reduction of turbidity, or any other suitable stoichiometric silicon nitride. "Contact" layers 7, 11, and 17 each contact at least one IR-reflecting layer (eg, the Ag-based layer). Discharge deposited layers 3-26 constitute the low-E (i.e., low emissivity) coating 30 which is provided on the glass or plastic substrate 1.
    [00016] In monolithic situations, the coated article only includes a glass substrate 1, as illustrated in figure 1. However, the monolithic coated articles contained herein can be used in devices such as laminated vehicle windshields, window units of GI, and the like. As for IG window units, an IG window unit can include two separately spaced glass substrates. An example IG window unit is illustrated and described, for example, in U.S. Patent Document No. 2004/0005467, the disclosure of which is hereby incorporated herein by reference. Figure 2 shows an example IG window unit that includes the coated glass substrate shown in Figure 1, joined to another glass substrate 2 by means of spacer(s), seal(s) 40 or the like, with an opening 50 being defined between them. This gap 50 between substrates in the IG unit arrangements can, in certain situations, be filled with a gas such as argon (Ar) (in addition to or including air). An example IG unit may comprise a pair of separately spaced glass substrates, each about 3-6 mm thick, one of which is coated with a coating 30 contained herein in certain example situations, where the opening 50 between the substrates can be from about 5 to 30 mm, more preferably from about 10 to 20 mm, and most preferably about 16 mm. In certain exemplary situations, the coating 30 may be provided on the inner surface of the substrate facing the opening 50 (the coating is shown on the main inner surface of the substrate 1 in Figure 2 facing the opening 50, however, conversely, could be on the main inner surface of substrate 2 facing opening 50). Substrate 1 or substrate 2 can be the outermost substrate of the IG window unit on the outside of the building (for example, in figure 2 it is the substrate closest to the outside of the building).
    [00017] The absorption layer 4 is, in certain exemplary embodiments of this invention, located between, and contacting, the nitride-based dielectric layers 14 and 14'. In certain exemplary embodiments, each of the layers 14 and 14' surrounding the absorption layer 4 is a nitride layer and is substantially or entirely unoxidized. The absorption layer 25 is, in certain exemplary embodiments of this invention, located between and contacting the metallic or substantially metallic IR reflective layer 19 and the nitride-based dielectric layer 26. In certain exemplary embodiments, each of layers 19 and 26 surrounding absorption layer 25 are substantially or entirely unoxidized. Optionally, the outermost part of layer 26 can be oxidized if it is the outermost layer of coating 30 and is exposed to the atmosphere. The use of the nitride layers 14, 14' and 26, and the metallic or substantially metallic layer 19, around the absorber layers 4 and 25, is advantageous as it helps to prevent (or reduce the likelihood that) the absorption layers 4, 25 are oxidized during the heat treatment, thereby better allowing the absorption layers 4, 25 to perform a desired function, in particular by absorbing at least some amount (eg at least 5%, more preferably at least 10%) visible light. It will be appreciated that if a layer becomes too oxidized during heat treatment or the like, it can no longer act as a suitable absorption layer.
    [00018] In certain exemplary embodiments of this invention, absorption layers 4 and 25 may be of, or include, NiCr (any suitable Ni:Cr ratio), and may or may not be nitrified (NiCrNx). Absorption layers 4 and 25 are located between, and counting, substantially unoxidized layers, as shown in Figure 1. In certain exemplary embodiments, each of the nitride-based layers 14, 14', 26 surrounding the absorption layers 4, 25 is a nitride layer and is substantially or entirely unoxidized, and the IR reflective layer 19 is also substantially or entirely unoxidized. In certain exemplary embodiments, the absorption layers 4, 25 may comprise from 0-10% oxygen, more preferably from 0-5% oxygen, and most preferably from 0-2% oxygen (atomic%). In certain exemplary embodiments, one or both of the absorption layers 4, 25 comprise from 020% nitrogen, more preferably from 1-15% nitrogen, and most preferably from about 1-12% nitrogen (atomic %) . Although NiCr is a preferred material for absorption layers 4 and 25, it is possible that other materials could be used instead. For example, in certain other heat-treatable embodiments of this invention, absorption layers 4 and/or 25 can be of, or include, Ni, Cr, NiCrNx, CrN, ZrN, or TiN. In non-heat treatable embodiments, any of the aforementioned materials can be used for absorber/absorbent layers 4 and/or 25, as well as other materials such as Ti, Zr, NiOx or the like.
    [00019] The absorber layers 4 and 25 of the low-E coating 30 are designed to cause the coating 30 to have lower visible transmission, desirable coloration, and low reflectance on the film side. In certain exemplary embodiments, the metallic or substantially metallic (e.g., NiCr or NiCrNx) absorber layer 4 may be about 20-120 angstroms (A) thick, more preferably about 35-75 angstroms (A) ) thick, and most preferably about 50-70 angstroms(A) thick. In certain exemplary embodiments, the upper metallic or substantially metallic absorber layer (e.g., NiCr or NiCrNx) 25 may be about 15-70 angstroms (A) thick, more preferably about 23-48 angstroms (A) thick, and more preferably about 27-43 angstroms (A) thick. In certain exemplary embodiments, upper absorbent layer 25 may be thinner than lower absorbent layer 4. For example, in certain exemplary embodiments, upper absorbent layer 25 may be at least 10(A) thinner (more preferably at least 20 angstroms thinner) than the lower absorbent layer 4 to provide the desirable optical characteristics of the coated article. It has been found that a combination of low visible transmission, reduced visible film side reflectance, and desirable optical characteristics can be obtained by having the absorber layers in both the middle dielectric portion of the stack (see absorber layer 4) and providing another absorber layer 25 at the top of the stack, above the top IR reflective layer 19, as it has been found that moving a significant absorption to the top of the stack via layer 25 results in side reflectance of reduced film, compared to providing the absorber layer only between the IR reflective layers, while still allowing for desirable optical characteristics such as angled color, etc. by means of the absorption layer 4 in the middle part of the stack.
    [00020] Thereby, an absorbent layer 25 is provided in the upper stack (above the upper Ag-based IR reflective layer 19), and a second absorbent layer 4 is provided in the middle part of the stack (between the reflective layers of IV 9, 19). Preferably, in certain dual silver embodiments (i.e., where the low-E coating has two Ag-based IR reflective layers), no similar absorbent layer is provided below the lower IR reflective layer 9. In other words , although absorber layers 4 and 25 are provided in the middle and upper parts of the coating, there is no similar absorbent layer among the nitrides provided below the bottom IR reflective layer 9.
    [00021] Dielectric layers 3, 14, 14' and 26 can be of, or include, silicon nitride in certain embodiments of this invention. Silicon nitride layers 3, 14, 14' and 26 can, among other things, improve the thermal stability of the coated articles and protect the absorbent layers during optional HT, for example, such as thermal quenching or the like. One or more of the silicon nitride of layers 3, 14, 14' and 26 may be of the stoichiometric type (i.e. Si3N4), or alternatively of the Si-rich silicon nitride type in different embodiments of this invention. The presence of free Si in a layer comprising Si 3 -rich silicon nitride may allow certain atoms, such as sodium (Na), which migrate outward from glass 1 during HT, to be more efficiently interrupted by ( s) layer(s) comprising(s) Si-rich silicon nitride before they can reach silver 9 and damage it. It is believed that Si-rich SixNy can reduce the amount of damage done to the silver layer(s) during HT, in certain exemplary embodiments of this invention, thereby allowing the sheet strength (Rs) to decrease or remain approximately the same in a satisfactory manner. In addition, it is believed that Si-rich SixNy can reduce the amount of damage (e.g., oxidation) done to absorbent layer 4 (and/or 25) during HT, in certain optional exemplary embodiments of this invention. In certain exemplary embodiments, when Si-rich silicon nitride is used, the Si-rich silicon nitride layer as deposited can be characterized by SixNy layer(s), where x/y can be 0, 76 to 1.5, more preferably from 0.8 to 1.4, even more preferably from 0.82 to 1.2. Furthermore, in certain example modalities, before and/or after HT, the Si-rich SixNy layer(s) may have a refractive index "n" of at least 2.05 , more preferably at least 2.07, and sometimes at least 2.10 (eg 632 nm) (note: stoichiometric Si3N4, which can also be used, has an "n" index of 2.02 -2.04). It is observed that n and k tend to fall due to heat treatment. Any of the silicon nitride layers discussed in this document may be doped with other materials, such as stainless steel or aluminum, in certain exemplary embodiments of this invention. For example, any silicon nitride layers discussed herein may optionally include from about 015% aluminum, more preferably from about 1 to 10% aluminum, in certain exemplary embodiments of this invention. Silicon nitride can be deposited by discharging a Si or SiAl target, into an atmosphere having argon gas and nitrogen, in certain embodiments of this invention. Small amounts of oxygen can also be provided, in certain situations, in the silicon nitride layers.
    [00022] Infrared (IR) reflective layers 9 and 19 are preferably substantially or entirely metallic and/or conductive, and may comprise, or consist essentially of, silver (Ag), gold, or any other material reflective of IV adapting. The IR 9 and 19 reflective layers help to allow the coating to have low-E and/or good solar control characteristics. IR reflective layers may, however, be slightly oxidized in certain embodiments of this invention.
    [00023] Contact layer 11 can be of, or include, nickel oxide (Ni), chromium oxide (Cr), NiCr, or a nickel alloy oxide such as nickel chromium oxide (NiCrOx), or other suitable material(s), in certain exemplary embodiments of this invention. The use of, for example, NiCrOx in layer 11 allows durability to be improved. Layer 11 NiCrOx may be fully oxidized in certain embodiments of this invention (ie fully stoichiometric), or alternatively may only be partially oxidized. In certain situations, the NiCrOx 11 layer can be at least about 50% oxidized. Contact layer 11 (for example, of or including an oxide of Ni and/or Cr) may or may not be classified by oxidation, in the different embodiments of this invention. Oxidation classification means that the degree of oxidation in the layer changes throughout the thickness of the layer, so that, for example, a contact layer can be classified so that it is less oxidized at the contact interface with the reflective layer of immediately adjacent IR 9 than in a part of the contact layer(s) furthest away from or further away from the immediately adjacent IR reflective layer. Descriptions of the various types of oxidation-classified contact layers are set forth in U.S. Patent No. 6,576,349, the disclosure of which is hereby incorporated herein by reference. Contact layer 11 (e.g. of or including an oxide of Ni and/or Cr) may or may not be continuous, in different embodiments of this invention, through the entire IR reflective layer 9. In certain alternative embodiments of example of this invention, layer 11 may instead be made as a metallic or substantially metallic (e.g. NiCr or NiCrNx) absorbing layer as layer 25.
    [00024] The dielectric layers 13 and 15 can be of, or include, tin oxide, in certain exemplary embodiments of this invention. However, as with the other layers contained herein, other materials can be used in different situations. The interlayer 15 of or including tin oxide is provided under the IR reflective layer 19 so as to be located between the silicon nitride layer 14' and the zinc oxide layer 17. The use of such an interlayer comprising tin oxide 15 results in several improvements compared to a situation where the layer is not provided. For example, it has been found that the use of such an interlayer comprising tin oxide 15 results in a coated article that is capable of achieving: (a) less change in visible transmission due to heat treatment, (b) greater transmission in visible after heat treatment; (c) less change in the value(s) of certain colors due to heat treatment, (d) substantially neutral coloration after heat treatment; (e) more stable or even decreasing sheet strength due to heat treatment, (f) lower sheet strength and thus lower emissivity after heat treatment, (g) improved turbidity characteristics after heat treatment, and /or (h) improved mechanical durability, such as scratch resistance before and/or after heat treatment. Thus, in certain exemplary embodiments of this invention, the coated articles can be subjected to higher temperatures during the heat treatment and/or for longer times, without experiencing significant unwanted drops in transmission and/or increases in sheet strength. In certain alternative embodiments, it is possible to dope the tin oxide from layer 15 with other materials such as Al, Zn or the like. Alternatively, other metal oxide(s) can be used for layer 15 in certain situations.
    [00025] Lower contact layers 7 and/or 17, in certain embodiments of this invention, are of, or include, zinc oxide (e.g., ZnO). The zinc oxide of layers 7 and 17 can contain other materials as well, such as Al (for example, to form ZnA-10x). For example, in certain exemplary embodiments of this invention, one or more of the zinc oxide layers 7, 17 may be doped with from about 1 to 10% Al, more preferably from about 1 to 5% Al, and more preferably about 1 to 4% Al.
    [00026] Other layer(s) below or above the illustrated coating may also be provided. Thus, although the layer or coating system is "on" or is "supported by" substrate 1 (directly or indirectly), other layer(s) may be provided in between. Thus, for example, the coating of figure 1 can be considered "on" and "supported by" substrate 1, even if other layer(s) are provided between layer 3 and substrate 1. In addition, certain layers of the illustrated coating can be removed in certain modalities, while others can be added between the different layers, or the different layers can be split with other added layer(s). s) between the divided sections, in other modalities of this invention, without departing from the global spirit of certain modalities of this invention.
    [00027] Although various thicknesses and materials can be used in the layers, in the different embodiments of this invention, the thicknesses and example materials for the respective layers on the glass substrate 1 in the embodiment of figure 1 are as follows, a from the glass substrate externally (note that the NiCr layers may or may not be partially nitrified): Materials/Example Thicknesses; Type of figure 1

    [00028] It can be seen that the bottom absorbent layer 4 is thicker than the top absorbent layer 25. For example, in certain embodiments, the bottom absorbent layer 4 is at least 10 Å thicker than the top absorbent layer 25, more preferably at least 20 Å thicker, and even more preferably at least 25 Å thicker. Also, it can be seen that, for the absorbing layer 4, the bottom silicon nitride layer 14 is thinner than the top silicon nitride layer 14'. For example, surrounding the absorber layer 4, in certain embodiments, the bottom silicon nitride layer 14 is at least 10 Å thinner than the top silicon nitride layer 14', more preferably at least about 20 Å or 25 Å thinner.
    [00029] In certain exemplary embodiments of this invention, the coated articles contained herein may have the following optical and solar characteristics, shown in Table 2, when measured monolithically. The foil strengths (Rs) contained herein take into account all IR reflective layers (eg silver layers 9, 19). Optical/Solar Characteristics (Monolithic; pre-HT)

    [00030] In certain embodiments, the coated articles contained herein may have the following characteristics, measured monolithically, for example, after heat treatment (HT): Optical/Solar Characteristics (Monolithic; post-HT)

    [00031] Furthermore, in certain exemplary laminated embodiments of this invention, the coated articles contained herein, which have optionally been heat treated to a degree sufficient to temper, and which have been joined to another glass substrate to form a IG unit, can have the following optical/solar characteristics of the IG unit in a structure as shown in figure 2 (eg where the two sheets of glass are 4 mm thick and 6 mm thick, respectively, of glass transparent with a 16 mm opening between them, filled with argon/air 90/10). It can be seen that the film side reflection increases when placed in an IG window unit. Example Optical Characteristics (pre- or post-HT IG unit)

    [00032] The following examples are provided for example purposes only, and are not intended to be limiting unless specifically claimed. EXAMPLES
    [00033] Example 1 below was prepared by discharging onto a 6 mm thick transparent glass substrate, in order to have approximately the stack of layers shown below. Example 1 is in accordance with the exemplary embodiments of this invention as shown in Figure 1, while Comparative Example (EC) below has a NiCr absorbing layer only in the middle of the stack and is provided for comparison purposes. Example 1 had approximately the following stack of layers, where thicknesses are in angstrom units (A), and NiCr absorber layers 4 and 25 were slightly nitrified. EXAMPLE 1

    [00034] The Comparative Example (EC) had a NiCr absorber layer similar to those in Example 1, however, in EC, the only absorber layer was located only in the middle stack, between the silver layers. The EC had the following stack of layers from the glass externally. COMPARATIVE EXAMPLE


    [00035] The optical characteristics of Example 1 compared with those of Comparative Example (EC), measured in a post-HT monolithic manner, are shown below. COMPARISON BETWEEN EXAMPLE 1 AND COMPARATIVE EXAMPLE

    [00036] It can be seen from the above that Example 1 had a surprisingly higher (smaller) visible film-side reflectance (RfY) than the Comparative Example (EC), although Example 1 also had a transmission in the visible (TY) lower than EC, namely 22.3% in Example 1 compared to 32.3% in EC. Thereby, absorber layers 4 and 25 in the middle and upper parts of the low-E coating in Example 1 (in contrast to only in the center part, as in EC), joined by removing the tin oxide layer from the The EC's superior dielectric stack surprisingly made the low-E coating to have a combination of both (i) low visible transmission and (ii) low visible film-side reflectance. The layer thicknesses of Example 1 also surprisingly allowed more desired optical characteristics to be obtained compared to EC.
    [00037] In certain exemplary embodiments of this invention, a coated article is provided which includes a coating 30 supported by a glass substrate 1, the coating comprising: the first and second infrared (IR) reflective layers 9 and 19 comprising silver, wherein said IR-reflective layers 9 and 19 are spaced apart from one another, and wherein the first IR-reflective layer 9 is located closer to the glass substrate 1 than is the second IR-reflective layer 19; a substantially metallic or metallic first absorption layer 4 comprising Ni and/or Cr, located such that the first absorption layer 4 is located between the first and second IR reflective layers 9 and 19, where the first IR layer 4 is located. absorber 4 is sandwiched between and contacting first and second dielectric layers 14 and 14' comprising, or consisting essentially of, silicon nitride; and a second substantially metallic or metallic absorption layer 25 comprising Ni and/or Cr, located such that both the first and second IR reflector layers 9, 19 are located between the glass substrate 1 and the second IR layer. absorption 25, where the second absorption layer 25 is located between and contacting the second IR reflective layer 19 and a third dielectric layer 26 comprising silicon nitride.
    [00038] In the coated article of the immediately preceding paragraph, said first and/or second absorption layers may each comprise or consist essentially of NiCr and/or NiCrNx.
    [00039] In the coated article of any of the two preceding paragraphs, said first and/or second absorption layers may each comprise from 1-15% nitrogen (atomic %).
    [00040] In the coated article of any of the three preceding paragraphs, said first and second IR reflective layers are spaced apart by at least moving away from the glass substrate: a layer comprising tin oxide 13, said first layer comprising nitride of silicon 14, said first absorption layer 4, said second dielectric layer comprising silicon nitride 14', another layer comprising tin oxide 15, and a layer comprising zinc oxide 17.
    [00041] In the coated article of any of the four preceding paragraphs, in certain exemplary embodiments, no metallic or substantially metallic absorption layer is located between the first IR reflective layer and the glass substrate.
    [00042] In the coated article of any of the five preceding paragraphs, in certain exemplary embodiments, only two IR reflective layers comprising silver are contained in the coating.
    [00043] In the coated article of any of the six preceding paragraphs, the first absorption layer may be about 35-75 angstroms (A) thick.
    [00044] In the coated article of any of the seven preceding paragraphs, the second absorption layer may be about 23-48 angstroms (A) thick.
    [00045] In the coated article of any of the eight preceding paragraphs, the first absorption layer may be substantially thicker than the second absorption layer.
    [00046] In the coated article of any of the nine preceding paragraphs, said coated article may have a visible transmission of about 20-43% (more preferably of about 24-36%), measured monolithically.
    [00047] In the coated article of any of the ten preceding paragraphs, the coated article may be heat tempered, or not heat treated.
    [00048] In the coated article of any of the eleven preceding paragraphs, the coating, in certain exemplary embodiments, may contain no more than two metallic or substantially metallic absorption layers, consisting essentially of NiCr or NiCrNx.
    [00049] In the coated article of any of the twelve preceding paragraphs, the third layer comprising silicon nitride may be an upper layer of the coating.
    [00050] In the coated article of any of the thirteen preceding paragraphs, said first IR-reflective layer and said first absorption layer may be spaced apart by at least moving away from the glass substrate: a layer comprising a NiCr oxide, a layer comprising tin oxide, and the first layer comprising silicon nitride.
    [00051] In the coated article of any of the fourteen preceding paragraphs, the coated article may have a visible film side reflectance (RfY), measured monolithically, of less than or equal to 26%, more preferably less than or equal to 24%.
    [00052] In the coated article of any of the fifteen preceding paragraphs, a substantially oxidized layer comprising an oxide of NiCr may be located on, and directly contacting, the first IR reflective layer.
    [00053] Although the invention has been described with reference to what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but rather is intended to cover various modifications and equivalent arrangements included in the spirit and scope of the appended claims.
    权利要求:
    Claims (20)
    [0001]
    1. Coated article including a coating (30) supported by a glass substrate (1), the coating comprising: first and second infrared (IR) reflective layers (9, 19) comprising silver, wherein said reflective layers IR reflectors (9, 19) are spaced apart, and where the first IR reflective layer (9) is located closer to the glass substrate (1) than is the second IR reflective layer (19); a second metallic absorption layer (25) comprising Ni and/or Cr, located such that both the first and second IR-reflective layers (9, 19) are located between the glass substrate (1) and the second layer absorption layer (25), where the second absorption layer (25) is located between and in contact with the second IR reflective layer (19) and a third dielectric layer (26) comprising silicon nitride, characterized in that that a first metallic absorption layer (4) comprising Ni and/or Cr is located between the first and second IR reflective layers (9, 19), where the first absorption layer (4) is sandwiched between, and in contact with, , the first and second dielectric layers comprising silicon nitride (14, 14'); wherein the first and second metallic absorption layers (4, 25) comprise from 0-5% oxygen (% atomic) and the first and second IR reflective layers (9, 19) are spaced at least apart from the glass substrate: a layer comprising tin oxide (13), said first layer comprising silicon nitride (14), said first absorption layer (4), said second dielectric layer comprising silicon nitride (14'), another layer comprising tin oxide (15) and a layer comprising zinc oxide (17).
    [0002]
    2. Coated article according to claim 1, characterized in that each of said first and second absorption layers (4, 25) comprises NiCr.
    [0003]
    3. Coated article according to claim 1, characterized in that each of said first and second absorption layers (4, 25) comprises NiCrNx.
    [0004]
    4. Coated article according to any one of claims 1 to 3, characterized in that each of said first and second absorption layers (4, 25) comprises 1-15% nitrogen (atomic%).
    [0005]
    5. Coated article according to any one of claims 1 to 4, characterized in that no metallic absorption layer is located between the first IR reflective layer and the glass substrate.
    [0006]
    6. Coated article according to any one of claims 1 to 5, characterized in that only two IR reflective layers comprising silver are contained in the coating.
    [0007]
    7. Coated article according to any one of claims 1 to 6, characterized in that the first absorption layer (4) is 3575 angstroms (A) thick.
    [0008]
    8. Coated article according to any one of claims 1 to 7, characterized in that the second absorption layer (25) is 2348 angstroms (A) thick.
    [0009]
    9. Coated article according to any one of claims 1 to 8, characterized in that the first absorption layer (4) is thicker than the second absorption layer (25).
    [0010]
    10. Coated article, according to any one of claims 1 to 9, characterized in that said coated article has a visible transmission of 20-43%, measured in a monolithic way.
    [0011]
    11. Coated article according to any one of claims 1 to 10, characterized in that said coated article has a visible transmission of 24-36%, measured in a monolithic way.
    [0012]
    12. Coated article according to any one of claims 1 to 11, characterized in that the coated article is thermally hardened.
    [0013]
    13. Coated article according to any one of claims 1 to 11, characterized in that the coated article is not heat treated.
    [0014]
    14. Coated article according to any one of claims 1 to 13, characterized in that the coating (30) contains no more than two metallic absorption layers, consisting essentially of NiCr or NiCrNx.
    [0015]
    15. Coated article according to any one of claims 1 to 14, characterized in that the third layer comprising silicon nitride (26) is an upper layer of the coating (30).
    [0016]
    16. Coated article according to any one of claims 1 to 15, characterized in that said first IR reflective layer (9) and said first absorption layer (4) are spaced at least apart from the glass substrate: a layer comprising a NiCr oxide (11), a layer comprising tin oxide (13), and the first layer comprising silicon nitride (14).
    [0017]
    17. Coated article according to any one of claims 1 to 16, characterized in that the coated article has a visible film-side reflectance (RfY), measured monolithically, of less than or equal to , 26%.
    [0018]
    18. Coated article according to any one of claims 1 to 17, characterized in that the coated article has a visible film-side reflectance (RfY), measured monolithically, of less than or equal to , 24%.
    [0019]
    19. Coated article according to any one of claims 1 to 18, characterized in that an oxidized layer comprising an oxide of NiCr is located on, and directly contacting, the first IR reflective layer.
    [0020]
    20. Coated article according to any one of claims 1 to 19, characterized in that a metallic layer comprising NiCr and/or NiCrNx (11) is located on, and directly contacting, the first IR reflective layer (9) .
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    同族专利:
    公开号 | 公开日
    MX2015002862A|2015-10-09|
    BR112015004927A2|2017-07-04|
    US20160116651A1|2016-04-28|
    IN2015DN01873A|2015-08-07|
    EP2892857A2|2015-07-15|
    WO2014039349A3|2014-05-30|
    CN104781203A|2015-07-15|
    KR20150054864A|2015-05-20|
    US20170322355A1|2017-11-09|
    JP2015533761A|2015-11-26|
    TWI612018B|2018-01-21|
    WO2014039349A2|2014-03-13|
    JP6420242B2|2018-11-07|
    US9733403B2|2017-08-15|
    RU2637390C2|2017-12-04|
    US10393932B2|2019-08-27|
    TW201412673A|2014-04-01|
    US20140071524A1|2014-03-13|
    US9242895B2|2016-01-26|
    CN104781203B|2017-06-13|
    RU2015112590A|2016-10-27|
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    法律状态:
    2018-03-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2018-03-13| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2018-03-20| B06I| Publication of requirement cancelled [chapter 6.9 patent gazette]|Free format text: ANULADA A PUBLICACAO CODIGO 6.6.1 NA RPI NO 2462 DE 13/03/2018 POR TER SIDO INDEVIDA. |
    2019-10-08| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-02-11| B25A| Requested transfer of rights approved|Owner name: GUARDIAN GLASS, LLC (US) |
    2021-04-06| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2021-06-15| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-31| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 28/08/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/606,291|US9242895B2|2012-09-07|2012-09-07|Coated article with low-E coating having absorbing layers for low film side reflectance and low visible transmission|
    US13/606,291|2012-09-07|
    PCT/US2013/057006|WO2014039349A2|2012-09-07|2013-08-28|Coated article with low-e coating having absorbing layers for low film side reflectance and low visible transmission|
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