• 专利附录
  • 专利说明
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    • 专利摘要:
    ARTICLE COATED WITH LOW-E COATING WITH Poor VISIBLE TRANSMISSION. This invention relates to a coated article including a low-emissivity (low-E) coating. In certain exemplary embodiments, the low-E coating is provided on a substrate (for example, glass substrate) and includes at least the first and second infrared (IV) reflective layers (for example, silver-based layers) which are spaced separately by contact layers (eg NiCr-based layers) and a dielectric layer of / or including a material such as silicon nitride. In certain exemplary embodiments, the coated article has poor visible transmission (for example, not greater than 50%, more preferably not greater than about 40%, and most preferably not greater than about 39%).
    公开号:BR102012033448B1
    申请号:R102012033448-8
    申请日:2012-12-27
    公开日:2020-12-29
    发明作者:Francis Wuillaume；Muhammad Imran；Afonso KRELING；Brent Boyce
    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 (E-low) coating. In certain exemplary embodiments, the low-E coating is provided on a substrate (for example, glass substrate) and includes at least the first and second infrared (IR) reflective layers (for example, silver-based layers), which are spaced individually by contact layers (eg NiCr based layers) and a dielectric layer of a material or including such as silicon nitride. In certain exemplary embodiments, the coated article has poor visible transmission (for example, not greater than 50%, more preferably not greater than about 42%, and most preferably, not greater than about 39%). In certain exemplary embodiments, the coated article can be heat treated (for example, thermally tempered and / or heat curved), and is designed to be substantially thermally stable after heat treatment (HT) where its ΔE value * (reflective glass side) due to HT is not greater than 4.6, and more preferably not greater than 3.6. Coated articles according to certain exemplary embodiments of this invention can be used in the context of insulating glass window (IG) 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 cases, it is desirable to thermally treat (e.g., thermal temperament, heat curvature and / or thermal strengthening) such coated articles for purposes of temperament, curvature, or the like. Heat treatment (HT) of coated articles typically requires the use of temperatures of at least 580 ° C, more preferably at least about 600 ° C and even more preferably at least 620 ° C. Such high temperatures (for example, for 5 to 10 minutes or more) often cause the coatings to decompose and / or deteriorate or change in an unpredictable way. Thus, it is desirable that the coatings are able to withstand such heat treatments (for example, thermal temperament), if desired, in a predictable manner that significantly does not damage the coating.
    [0003] In certain situations, designers of coated articles strive for a combination of desirable visible transmission, desirable color, low emissivity (or emissivity), and poor laminar resistance (Rs). The characteristics of low emissivity (low-E) and weak laminar resistance allow such coated articles to block significant amounts of IR radiation, in order to reduce, for example, undesirable heating of the interior of the vehicle or building.
    [0004] US Patent No. 7,521,096, incorporated herein by reference, discloses a low-E coating that uses zinc oxide (ZnO) contact layers below the silver-based IR reflective layers, and above the silver-based IR reflective layer (Ag) at the bottom uses a NiCrOx contact layer followed by a central dielectric layer of tin oxide (SnO2). Although the ZnO contact layers below the silver IR reflective layers provide good structural properties for silver proliferation, ZnO has been observed to degrade the chemical, environmental and mechanical durability of the coating in certain examples. In addition, the thick SnO2 dielectric layer was observed to present microcrystallization and tension after HT that causes imperfect interfaces between SnO2, ZnO and Ag, which can lead to degradation of durability and affect transmitted color.
    [0005] US Patent No. 5,557,462 discloses a low-E coating with a stack of layers of SiN / NiCr / Ag / NiCr / SiN / NiCr / Ag / NiCr / SiN. However, the coated article of the '462 patent is designed for a high visible transmission of at least 63%. Lower visible transmissions are often desirable. In addition, as explained widely in US Patent No. 8,173,263, the coated articles of the '462 patent are not heat treatable, because after heat treatment the laminar resistance (Rs) goes much higher, such as from about 3 to 5 for more than 10, turbidity tends to settle, and the ΔE * value on the side of the reflective glass is undesirable because it is above 5.0.
    [0006] Consequently, it would be desirable to provide a coated article that is characterized by one or more of: (i) poor visible transmission, (ii) good durability, and (iii) thermal stability after HT in order to design an ΔE * value of side of the reflective glass not greater than about 4.6, more preferably not greater than about 3.6.
    [0007] The term ΔE * (and ΔE) is well understood in the art and is reported, along with several techniques for its determination, in ASTM 2244-93 as well as being reported in Hunter et. al., The Measurement of Appearance, 2nd Ed. Cptr. 9, page 162 et seq. [John Wiley & Sons, 1987]. As used in the technique, ΔE * (and ΔE) is a way to adequately express the change (or lack thereof) in reflectance and / or transmittance (and thus also the appearance of color) in an article after or due to heat treatment. ΔE can be calculated using the "ab" technique, or using the Hunter technique (designated using a "H" subscript). ΔE corresponds to the Hunter Lab L scale, a, b (or Lh, ah, bh). Similarly, ΔE * corresponds to the CIE LAB Scale L *, a *, b *. Both are considered useful, and equivalent for the purposes of the present invention. For example, as reported in Hunter et. al. mentioned above, the rectangular coordinate / scale technique (CIE LAB 1976) known as the L *, a *, b * scale can be used, where: L * is (CIE 1976) luminosity units; a * is (CIE 1976) units of red-green; b * is (CIE 1976) yellow-blue units; and distance ΔE * between L * 0 to * 0 b * 0 and 2 2 2 1 / 2L 1 to 1 b 1 is: ΔE = [(ΔL) + (Δa) + (Δb)], where: ΔL = L 1 - L 0; Δa = a * 1 - a * 0; Δb * = b * 1 - b * 0; where the subscript "0" represents the coating (coated article) before heat treatment and the subscript "1" represents the coating (coated article) after heat treatment; and the numbers used (for example, a *, b *, L *) are those calculated using the coordinate technique (CIE LAB 1976) L *, a *, b * mentioned above. When, for example, ΔE * values on the side of the reflective glass are measured, then the values a *, b * and L * on the side of the reflective glass are used. In a similar way, AE can be calculated using the above equation for ΔE *, that is, ΔE * = [(ΔL *) 2 + (Δa *) 2 + (Δb *) 2] 1/2 by replacing a *, b *, L * with Hunter Lab values ah, bh, Lh. Also within the scope of this invention and the quantification of ΔE * are the equivalent numbers if converted to those calculated by any other technique that employs the same concept of ΔE * as defined above. BRIEF SUMMARY OF EXEMPLARY MODALITIES OF THE INVENTION
    [0008] This invention relates to a coated article that includes a low-emissivity (E-low) coating. In certain exemplary embodiments, the low-E coating is provided on a substrate (for example, glass substrate) and includes at least the first and second infrared (IR) reflective layers (for example, silver-based layers), which are spaced individually by contact layers (eg NiCr based layers) and a dielectric layer of a material or including such as silicon nitride. In certain exemplary embodiments, the coated article has poor visible transmission (for example, not greater than 50%, more preferably not greater than about 42%, more preferably not greater than about 40%, and most preferably not greater than about 39%). In certain exemplary embodiments, the coated article can be heat treated (for example, thermally tempered and / or heat curved), and is designed to be substantially thermally stable after heat treatment (HT) where its ΔE value * (reflective glass side) due to the HT is not greater than 4.6, more preferably not greater than 3.6. Such a low ΔE * value indicates that the coated article has approximately the same transmission and color characteristics as seen by the naked eye both before and after heat treatment (for example, thermal temperament). Coated articles according to certain exemplary embodiments of this invention can be used in the context of insulating glass window (IG) units, vehicle windows, other types of windows, or in any other suitable application.
    [0009] It is desirable to provide a coated article that is characterized by one, two or all three of: (i) poor visible transmission, (ii) good durability, and (iii) thermal stability after HT in order to design an ΔE value * on the side of the reflective glass not greater than 4.6, more preferably not greater than 3.6.
    [0010] In certain exemplary embodiments of this invention, a coated article is provided including a coating supported by a glass substrate, comprising: first and second infrared (IR) reflective layers comprising silver, the first IR reflective layer being located closest the glass substrate than the second IR reflective layer; a first contact layer comprising NiCr located on and directly in contact with the first IR reflecting layer comprising silver; a dielectric layer comprising silicon nitride located on and directly in contact with the first contact layer comprising NiCr; a second contact layer comprising NiCr located on and directly in contact with the layer comprising silicon nitride; the second IR reflecting layer comprising silver located on and directly in contact with the second contact layer comprising NiCr; and wherein the second IR reflecting layer comprising silver is at least 10 angstroms (Â) thinner than the first IR reflecting layer comprising silver, and wherein the coated article has a visible transmission of not more than 50% . BRIEF DESCRIPTION OF THE DRAWINGS
    [0011] Figure 1 is a cross-sectional view of an artigorcoated according to an exemplary embodiment of this invention.
    [0012] Figure 2 is a cross-sectional view showing the artigorcoat of figure 1 provided in an IG window unit according to an exemplary embodiment of this invention.
    [0013] Figure 3 is a cross-sectional view showing the cloak of Figure 1 provided in a laminated window unit according to an exemplary embodiment of this invention. DETAILED DESCRIPTION OF THE EXEMPLARY MODALITIES OF THE INVENTION
    [0014] The coated articles contained herein may be used for applications such as IG window units, laminated window units (for example, for use in vehicle or building applications), vehicle windows, monolithic architectural windows, residential windows and / or any other suitable application that includes one or multiple glass substrates.
    [0015] In certain exemplary embodiments of this invention, the coating includes a double silver stack, although this invention is not so limited in all cases. With reference to figure 1, for example, in certain exemplary embodiments of this invention, a coated article is provided which includes a coating supported by a glass substrate, the coating comprising: the first 9 and second 19 infrared (IR) reflective layers that comprises silver, the first IR 9 reflecting layer being located closer to the glass substrate 1 than the second IR 19 reflecting layer; a first contact layer comprising NiCr 11 located on and directly in contact with the first IR reflecting layer comprising silver 9; a dielectric layer comprising silicon nitride 14 located on and directly in contact with the first contact layer comprising NiCr 11; a second contact layer comprising NiCr 17 located on and directly in contact with the layer comprising silicon nitride 14; the second IR reflecting layer comprising silver 19 located on and directly in contact with the second contact layer comprising NiCr 17; and wherein the second IR reflecting layer comprising silver 19 is at least 10 angstroms (Â) thinner than the first IR reflecting layer comprising silver 9, and wherein the coated article has a visible transmission of no more than 50%.
    [0016] In order to increase durability, in conjunction with optical and thermal properties, and to avoid significant structural changes before and after HT, articles coated according to certain exemplary embodiments of this invention have a central dielectric layer 14 of / or including silicon nitride and the lower contact layers 7, 17 are based on NiCr (as opposed to ZnO). It has also been observed that the use of metallic or substantially metallic NiCr (possibly partially subjected to nitride) in layers 7, 11, 17 and / or 21, improves chemical, mechanical and environmental durability (compared to the use of layers of lower ZnO contact underneath the highly oxidized silver and / or NiCr upper contact layers above the silver). It has also been observed that the inclusive layer of silicon nitride deposited by spraying 14 in an amorphous state, so that it is amorphous in both the coated and HT states, contributes to the overall stability of the coating. For example, 5% HCI at 65 degrees C for one hour will remove the coating from US Patent No. 7,521,096, while the coating shown in figure 1 and the examples contained therein will survive this HCI test. And in a high temperature and high humidity environment, there is less damage to the coating of figure 1 and the examples contained therein after ten days of exposure, than to the coating of the '096 patent after two days of exposure. And with respect to highly corrosive chemicals such as those used for "brick washing", the corrosion resistance is such that margin suppression does not need to be performed on certain exemplary IG and laminate modalities. Similarly, for mechanical abrasion tests, thermal cycling tests and salt turbidity, the coatings of the examples contained here were found to be better than those of the '096 patent. In addition, it has been observed that the production of the IR reflector layer based on higher Ag 19 substantially thinner than the IR reflective layer based on lower Ag 9 improves corrosion resistance and slightly improves solar performance. The coating can be used as coated, or heat treated, due to the relatively low ΔE * values discussed here. For example, when the coating 30 is located on the surface # 2 of an IG window unit, the low ΔE * values on the side of the reflective glass due to the heat treatment indicate that the coated article has approximately the same transmission and color characteristics when viewed with the naked eye, both before and after heat treatment (for example, thermal temperament), and thus can be used as coated or as heat treated without significantly affecting its optical characteristics.
    [0017] In certain exemplary embodiments of this invention such as Figure 1, heat-treated or non-heat-treated coated articles having multiple IR reflective layers (e.g., two separately spaced silver-based layers) are capable of resisting laminar (Rs) less than or equal to 5.0 (more preferably less than or equal to 4.0, even more preferably less than or equal to 3.0). The terms "heat treatment" and "heat treating" as used herein mean heating the article to a temperature sufficient to achieve thermal temperament, heat curvature and / or thermal reinforcement of the inclusive glass article. 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 temperament, curvature and / or thermal reinforcement. In certain cases, 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.
    [0018] Figure 1 is a side cross-sectional view of an artigorcoated according to an exemplary non-limiting embodiment of this invention. The coated article includes substrate 1 (for example, transparent glass, green, bronze or blue-green substrate of about 1.0 to 10.0 mm thick, more preferably of about 1.0 mm to 3.5 mm thickness), and the low-E coating (or layer system) 30 provided on substrate 1 directly or indirectly. The coating (or layer system) 30 includes, for example: the lower dielectric silicon nitride layer 3 which can be Si3N4, or the silicon nitride of the Si-rich type for reducing turbidity, or any other silicon nitride of appropriate stoichiometry in different modalities of this invention, the lower contact layer 7 (which comes into contact with the lower IR reflective layer 9), the first conductive infrared (IR) reflective layer and preferably metallic or substantially metallic 9, the upper contact layer 11 (which comes into contact with layer 9), the layer based on dielectric and / or inclusive silicon nitride 14, the lower contact layer 17 (which comes into contact with the IR reflective layer 19 ), the second conductive IR reflective layer and preferably metallic or substantially metallic, the upper contact layer 21 (which comes in contact with layer 19), layer of dielectric silicon nitride 24 which can be Si3N4, of the Si-rich type to reduce turbidity, or of any other stoichiometric silicon nitride suitable in different embodiments of this invention, and a cover layer 27 of / or including a material such as zirconium oxide (eg ZrO2) . The "contact" layers 7, 11, 17 and 21 each come in contact with an IR reflective layer (for example, the Ag-based layer). The aforementioned layers 3 to 27 constitute the low-E (i.e., low-emissivity) coating 30 which is supplied on the glass or plastic substrate 1. Layers 3 to 27 can be sprayed onto the substrate 1, in certain exemplary embodiments of this invention, with each layer being deposited by vacuum spraying using one or more targets as needed (the spray targets can be ceramic or metal). The metallic layers can be sprayed with an atmosphere containing argon gas, while the layers subjected to nitride can be sprayed with an atmosphere containing a mixture of nitrogen and argon gas.
    [0019] In monolithic examples, the coated article includes only a glass substrate 1 as illustrated in figure 1. However, the monolithic coated articles in this document can be used in devices such as laminated vehicle windshields, IG window units, and more. As for IG window units, an IG window unit can include two separately spaced glass substrates. An example of the IG window unit is illustrated and described, for example, in U.S. Patent Document No. 2004/0005467, the disclosure of which is incorporated herein by reference. Figure 2 shows an example of an IG window unit including the coated glass substrate 1 shown in figure 1 coupled to another glass substrate 2 through spacers, seals 40 or the like, with an opening 50 being defined between them. This opening 50 between the substrates in the IG window unit modalities can, in certain cases, be charged with a gas such as argon (Ar). An example of the IG unit can comprise a pair of separately spaced transparent glass substrates each about 3 to 4 mm thick, one of which is coated with a coating 30 contained here in certain exemplary cases, where the opening 50 between the substrates can be about 5 to 30 mm, more preferably about 10 to 20 mm, and most preferably around 16 mm. In certain exemplary cases, the low E-30 coating can be provided on the inner surface of the substrate that lines the opening (the coating is shown on the inner main surface of substrate 1 in figure 2 that lines the opening 50, but instead it can be on the internal main surface of the substrate 2 that lines the opening 50). Either 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, substrate 1 is the closest substrate to the outside of the building, and cladding 30 is supplied on surface # 2 of the IG window unit).
    [0020] Figure 3 shows a laminated window unit including the coated glass substrate 1 shown in figure 1 coupled to another glass substrate 2 through film lamination (eg PVB) 60. As shown in figure 3, the coating low-E 30 can limit the lamination of film 60 in such products.
    [0021] In certain exemplary embodiments of this invention, one, two, three or all four contact layers 7, 11, 17, 21 can be of / or include NiCr (any suitable Ni: Cr ratio), and may or may not be subjected to nitride (NiCrNx). In certain exemplary embodiments, one, two, three or all four of these inclusive layers of NiCr 7, 11, 17, 21 are substantially or completely unoxidized. In certain exemplary embodiments, one, two, three or all four layers based on NiCr 7, 11, 17, 21 may comprise 0 to 10% oxygen, more preferably 0 to 5% oxygen, and most preferably 0 to 2% oxygen (% atomic). In certain exemplary embodiments, one, two, three or all four of these layers 7, 11, 17, 21 may contain 0 to 20% nitrogen, more preferably 1 to 15% nitrogen, and most preferably about 1 to 12% nitrogen (% atomic). Although NiCr is a preferred material for absorption layers 4 and 25, it is possible that other materials may be in place or additionally used. For example, layers based on NiCr 7, 11, 17 and / or 21 may or may not be impregnated with another material such as stainless steel, Mo, or the like. It was observed that the use of contact layers based on NiCr 7 and / or 17 under the reflective IR layers based on silver 9, 19, improves the durability of the coated article (in comparison if layers 7 and 17 were used instead of ZnO).
    [0022] The dielectric layers 3, 14, and 24 can be of / or include silicon nitride in certain embodiments of this invention. The silicon nitride layers 3, 14 and 24 can, among other things, improve the heat treatment capacity of the coated articles and protect the other layers during the optional HT, for example, such as thermal temperament or the like. One or more of the silicon nitride layers 3, 14, 24 can be of the stoichiometric type (i.e., Si3N4), or alternatively of the Si-rich type of silicon nitride in different embodiments of this invention. The presence of free Si in an inclusive layer of Si 3 and / or 14-rich silicon nitride may, for example, allow certain atoms such as sodium (Na) that migrate out of glass 1 during HT to be more efficiently stopped by the inclusive layers of Si-rich silicon nitride before they can reach the silver and damage it. Thus, it is believed that Si-rich SixNy can reduce the amount of damage caused to the silver layer during HT in certain exemplary embodiments of this invention, thus allowing the sheet laminar resistance (Rs) to decrease or remain around it in a satisfactory way. In addition, it is believed that Si-rich SixNy in layers 3, 14 and / or 24 may reduce the amount of damage (eg oxidation) caused by silver and / or NiCr 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 (3, 14 and / or 24) as deposited can be characterized by SixNy layers, where x / y can be from 0.76 to 1.5, more preferably from 0.8 to 1.4, even more preferably from 0.82 to 1.2. Any and / or all of the silicon nitride layers discussed herein can be impregnated with other materials such as stainless steel or aluminum in certain exemplary embodiments of this invention. For example, any and / or all of the silicon nitride layers discussed herein can optionally include from about 0 to 15% aluminum, more preferably from about 1 to 10% aluminum, in certain exemplary embodiments of this invention. Silicon nitride can be deposited by spraying a target of Si or SiAl, in an atmosphere having argon and nitrogen, in certain embodiments of this invention. Small amounts of oxygen can also be provided in certain cases in the silicon nitride layers.
    [0023] The infrared reflective layers (IV) 9 and 19 are substantially or completely metallic and / or conductive, and may comprise or consist essentially of silver (Ag), gold, or any other suitable IR reflective material. Reflective layers 9 and 19 help to allow the coating to have low E and / or good solar control characteristics. The reflective IR layers can, however, be slightly oxidized in certain embodiments of this invention.
    [0024] Other layers below or above the illustrated coating can also be provided. Thus, although the layer or coating system is "in" or "supported by" substrate 1 (directly or indirectly), other layers can be provided between them. Thus, for example, the coating of figure 1 can be considered as "no" and "supported by" substrate 1 even though the other layers are provided between layer 3 and substrate 1. In addition, certain layers of the illustrated coating can be removed in certain embodiments, while others can be added between the various layers, or the multiple layers can be divided with the other layers added between the separate sections in other embodiments of this invention, without departing from the overall spirit of certain embodiments of this invention.
    [0025] Although various thicknesses and materials can be used in the layers in 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, from the glass substrate apparently : Sample Materials / Thicknesses; Figure 1 mode

    [0026] In certain exemplary embodiments of this invention, the coated articles contained herein may have the following optical and solar characteristics set out in Table 2 when measured monolithically (before and / or after the optional HT). The laminar resistances (Rs) here take into account all reflective IR layers (for example, silver layers 9, 19). Optical / solar characteristics (monolithic)

    [0027] In certain exemplary laminate embodiments of this invention, the coated articles contained herein that have been optionally heat treated to a sufficient extent for temperament, and that have been coupled to another glass substrate to form an IG unit, may have the characteristics optical / solar cells mentioned above in a structure as shown in figure 2 (for example, where the two glass slides are 4 mm thick and 6 mm thick, respectively, of transparent glass with a 16 mm opening between them loaded with 90/10 argon / air). Such IG window units can have a visible transmission of about 20 to 40% in certain exemplary embodiments of this invention. Alternatively, the coated articles contained herein that have been optionally heat treated to a sufficient extent for tempering, and that have been coupled to another glass substrate through the laminating material such as PVB 60 to form a laminated window unit, may have the following characteristics: optical / solar characteristics mentioned above in a structure as shown in figure 3 (that is, the laminated structure of figure 3 can have the optical / solar characteristics recited above).
    [0028] The following examples are provided for illustrative purposes only, and are not intended to be limiting, unless specifically claimed. EXAMPLES 1-3
    [0029] The following Examples 1-3 were prepared by spray coatings on clear / transparent substrates in order to have approximately the layer stacks shown below. The layer thicknesses below for the examples are in units of angstroms (Â), starting from the glass substrate moving externally.


    [0030] Presented below are the optical characteristics of Examples 1-3 measured in a laminated structure with two glass substrates as shown in figure 3. All values measured in the table immediately below are pre-HT, except that the ΔE * values were to HT. monolithic

    [0031] It can be seen from the examples above that the coated articles measured monolithically had desirable visible transmission (for example, in the range of about 20 to 42% measured monolithically) and had reflective color on the reasonably neutral glass side. In particular, a * g (color a * on the side of the reflective glass) was in a desirable range of about -5 to +3, and b * g (color b * on the side of the reflective glass) was in a desirable range of about from -10 to +2. These are desirable characteristics, especially when the coated article must be placed in an IG window unit as shown in figure 2 or in a laminated window unit as shown in figure 3.
    [0032] Presented below are the optical characteristics of the IG window units including the coated articles of Examples 1-3, namely, when the coated articles are located in the IG window units as shown in figure 2 (on the surface # 2 of the unit IG, so that the values on the side of the reflective glass are indicative of the outside).

    [0033] Presented below are the optical characteristics of the laminated window units including the coated articles of Examples 1-3, namely, when the coated articles are located in the IG window units as shown in figure 3 (on the surface # 2 of the unit , so that the values on the side of the reflective glass are indicative of the outside). Laminated window unit

    [0034] In certain exemplary embodiments of this invention, a coated article including a layer supported by a glass substrate is provided, the coating comprising: the first 9 and second 19 infrared (IR) reflective layers comprising silver, the first IR reflective layer 9 being located closer to the glass substrate 1 than the second IR reflective layer 19; a first contact layer comprising NiCr 11 located on and directly placed in contact with the first IR reflecting layer comprising silver 9; a dielectric layer comprising silicon nitride 14 located on and directly placed in contact with the first contact layer comprising NiCr 11; a second contact layer comprising NiCr 17 located on and directly placed in contact with the layer comprising silicon nitride 14; the second IR reflecting layer comprising silver 19 located on and directly in contact with the second contact layer comprising NiCr 17; and wherein the second IR reflecting layer comprising silver 19 is at least 10 angstroms (Â) thinner than the IR reflecting layer comprising silver 9, and wherein the coated article has a visible transmission of no more than 50 % (for example, measured monolithically and / or in a laminated window frame).
    [0035] In the coated article of the immediately preceding paragraph, the first contact layer comprising NiCr can be about 10 to 40 Ã… thick, more preferably about 15 to 30 Ã… thick, and most preferable about 18 to 25 Â in thickness.
    [0036] In the coated article of either of the two previous paragraphs, said first contact layer comprising NiCr can be 8 to 22 Â thicker than the second contact layer comprising NiCr, more preferably said first contact layer comprising NiCr it can be 10 to 18 Ã… thicker than the second contact layer comprising NiCr.
    [0037] In the article coated with any of the preceding three paragraphs, the second contact layer comprising NiCr may be about 5 to 22 µm thick, more preferably about 6 to 14 µm thick, and most preferably of about 7 to 11  in thickness.
    [0038] In the article coated with any of the preceding four paragraphs, the second IR reflecting layer comprising silver may be at least 20 angstroms (Â) thinner (more preferably at least 40 angstroms thinner) than the first reflective layer of IV comprising silver.
    [0039] In the coated article of any of the previous five paragraphs, the dielectric layer comprising silicon nitride 14 may be amorphous.
    [0040] In the coated article of any of the six previous paragraphs, the first contact layer comprising NiCr and / or the second contact layer comprising NiCr can be substantially metallic or metallic and contain no more than about 5% (% atomic) of oxygen.
    [0041] In the article coated with any of the seven previous paragraphs, said first and / or second contact layer may also contain nitrogen (for example, from about 1 to 10%, atomic%, nitrogen).
    [0042] In the coated article of any of the eight preceding paragraphs, said coated article can have a visible transmission of about 20 to 40% (more preferably about 27 to 39%) measured monolithically.
    [0043] The article coated with any of the nine previous paragraphs may or may not be heat treated (for example, thermally tempered). When treated with heat, the coated article may have an ΔE * value on the side of the reflective glass not greater than 4.6 (more preferably not greater than 3.6, and possibly 3.0 to 4.6) due to the heat treatment.
    [0044] In the coated article of any of the ten preceding paragraphs, the coating may further include another dielectric layer 24 comprising silicon nitride located at least on the second reflective layer of IV 19. The other dielectric layer 24 comprising silicon nitride can be from 150 to 290 Â in thickness. A cover comprising zirconium oxide 27 can be located on and directly in contact with another dielectric layer comprising silicon nitride 24.
    [0045] In the coated article of any of the preceding eleven paragraphs, the coating may further include a lower layer comprising silicon nitride 3 located on and directly in contact with the glass substrate 1, and another contact layer comprising NiCr 7 located between and directly in contact with the lower layer comprising silicon nitride 3 and the first IR reflecting layer comprising silver 9.
    [0046] In the article coated with any of the preceding twelve paragraphs, the first IR reflecting layer comprising silver may be 110 to 145 µm thick.
    [0047] In the article coated in any of the preceding thirteen paragraphs, the second reflective layer of IR comprising silver can be from 60 to 95 Â in thickness.
    [0048] In the coated article of any of the fourteen previous paragraphs, the coating may have a laminar resistance less than or equal to 4.0 ohms / square.
    [0049] The coated article of any of the previous fifteen paragraphs, when treated with heat, can have an AE * transmissive value of 2.0 to 3.2.
    [0050] The coated article of any of the sixteen previous paragraphs can be supplied in an IG window unit, or in a laminated window unit in which the substrate is coated and laminated on another glass substrate.
    [0051] Although the invention has been described in connection with that which is currently considered to be the most practical and preferred modality, it should be understood that the invention should not be limited to the disclosed modality, but on the contrary, it is intended to cover the various equivalent modifications and provisions included within the spirit and scope of the appended claims.
    权利要求:
    Claims (15)
    [0001]
    1. Coated article, characterized by the fact that it includes a coating (30) supported by a glass substrate (1), the coating (30) comprising: first (9) and second (19) infrared (IR) reflective layers comprising silver, the first IR reflecting layer (9) being located closer to the glass substrate (1) than the second IR reflecting layer (19); a first contact layer (11) comprising NiCr located on and directly in contact with the first IR reflecting layer (9) comprising silver; a dielectric layer (14) comprising silicon nitride located on and directly in contact with the first contact layer (11) comprising NiCr; a second contact layer (17) comprising NiCr located on and directly in contact with the layer comprising silicon nitride (14); the second IR reflecting layer (19) comprising silver located on and directly in contact with the second contact layer (17) comprising NiCr; and wherein the second IR reflecting layer (19) comprising silver is at least 10 angstroms (Â) thinner than the first IR reflecting layer (9) comprising silver and wherein the coated article has a visible non-transmittance more than 50%.
    [0002]
    2. Coated article according to claim 1, characterized by the fact that the first contact layer (11) comprising NiCr is about 15 to 30 µm thick.
    [0003]
    3. Coated article according to claim 1 or 2, characterized by the fact that the first contact layer (11) comprising NiCr is 8 to 22 Â thicker than the second contact layer (17) comprising NiCr, preferably, the first contact layer (11) comprising NiCr is 10 to 18 Ã… thicker than the second contact layer (17) comprising NiCr.
    [0004]
    Coated article according to any one of claims 1 to 3, characterized in that the second contact layer (17) comprising NiCr is about 6 to 14 µm thick.
    [0005]
    A coated article according to any one of claims 1 to 4, characterized by the fact that the second IR reflecting layer (19) comprising silver is at least 20 angstroms (Â) thinner than the first IR reflecting layer (9) comprising silver, preferably wherein the second IR reflecting layer (19) comprising silver is at least 40 angstroms (Â) thinner than the first IR reflecting layer (9) comprising silver.
    [0006]
    6. Coated article according to any one of claims 1 to 5, characterized by the fact that the first and / or second contact layer (11, 17) still contains nitrogen.
    [0007]
    A coated article according to any one of claims 1 to 6, characterized by the fact that the coated article is heat treated and has a ΔE * value on the side of the reflective glass not greater than 4.6 due to heat treatment and preferably not greater than 3.6 due to heat treatment.
    [0008]
    Coated article according to any one of claims 1 to 7, characterized by the fact that the coating (30) further comprises another dielectric layer comprising silicon nitride (24) located on at least the second IR reflective layer (19) and wherein preferably the other dielectric layer (24) comprising silicon nitride is 150 to 290 µm thick.
    [0009]
    Coated article according to any one of claims 1 to 8, characterized in that the coating (30) still comprises a coating (27) comprising zirconium oxide located on and directly in contact with the other dielectric layer (24 ) comprising silicon nitride.
    [0010]
    Coated article according to any one of claims 1 to 9, characterized in that the coating (30) still comprises a lower layer (3) comprising silicon nitride located on and directly in contact with the glass substrate ( 1), and another contact layer (7) comprising NiCr located between and directly in contact with the lower layer (3) comprising silicon nitride and the first IR reflecting layer (9) comprising silver.
    [0011]
    Coated article according to any one of claims 1 to 10, characterized in that the first IR reflecting layer (9) comprising silver is 110 to 145 Â in thickness and the second IR reflecting layer (19) comprising silver is 60 to 95 Â in thickness.
    [0012]
    12. Coated article, characterized by the fact that it includes a coating (30) supported by a glass substrate (1), comprising: first and second (9, 19) infrared (IV) reflective layers, the first reflective layer of IV (9) being located closer to the glass substrate (1) than the second IR reflective layer (19); a first substantially metallic contact layer (11) comprising NiCr located on and directly in contact with the first IR reflecting layer (9), the first substantially metallic contact layer (11) comprising NiCr being about 15 to 30 µm of thickness; a dielectric layer (14) comprising silicon nitride located on and directly in contact with the first contact layer (11) comprising NiCr; a second substantially metallic contact layer (17) comprising NiCr located on and directly in contact with the layer comprising silicon nitride (14); the second IR reflective layer (19) located on and directly in contact with the second contact layer comprising NiCr (17); and wherein the second IR reflecting layer (19) comprising silver is at least 10 angstroms (Â) thinner than the first IR reflecting layer (9) comprising silver.
    [0013]
    13. Coated article according to claim 12, characterized by the fact that the first contact layer (11) comprising NiCr is 8 to 22 Â thicker than the second contact layer (17) comprising NiCr.
    [0014]
    A coated article according to claim 12 or 13, characterized by the fact that the second IR reflecting layer (19) comprising silver is at least 40 angstroms (Â) thinner than the first IR reflecting layer (9) which comprises silver.
    [0015]
    15. Method of manufacturing a coated article including a coating (30) supported by a glass substrate (1), the method characterized by the fact that it comprises: spraying the first and second infrared (IR) reflective layers (9, 19) comprising silver, the first IR reflecting layer (9) being located closer to the glass substrate (1) than the second IR reflecting layer (19); spraying a first contact layer (11) comprising NiCr located on and directly in contact with the first IR reflecting layer (9) comprising silver; spraying a dielectric layer (14) comprising silicon nitride located on and directly in contact with the first contact layer (11) comprising NiCr; spraying a second contact layer (17) comprising NiCr located on and directly in contact with the layer comprising silicon nitride (14), the second IR reflective layer (19) comprising silver located on and directly in contact with second contact layer (17) comprising NiCr; and wherein the second IR reflecting layer (19) comprising silver is at least 10 angstroms (Â) thinner than the first IR reflecting layer (9) comprising silver and wherein the coated article has a visible non-transmittance more than 50% measured in monolithic form.
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    同族专利:
    公开号 | 公开日
    EP2903946A2|2015-08-12|
    KR102135078B1|2020-07-20|
    BR102012033448A2|2015-01-06|
    US20160340235A1|2016-11-24|
    TR201900648T4|2019-02-21|
    US20140098415A1|2014-04-10|
    KR20150065740A|2015-06-15|
    PL2903946T3|2019-02-28|
    WO2014055267A2|2014-04-10|
    RU2015116912A|2016-11-27|
    RU2638208C2|2017-12-12|
    CN104837785B|2017-11-10|
    US10196303B2|2019-02-05|
    US8940399B2|2015-01-27|
    BR112015007463A2|2017-07-04|
    WO2014055267A3|2014-05-30|
    US20150132555A1|2015-05-14|
    IN2015DN02720A|2015-09-04|
    CN104837785A|2015-08-12|
    ES2705850T3|2019-03-26|
    TWI597516B|2017-09-01|
    TW201418755A|2014-05-16|
    JP2015532256A|2015-11-09|
    MX2015003868A|2015-10-22|
    JP6328122B2|2018-05-23|
    US9422626B2|2016-08-23|
    EP2903946B1|2018-10-24|
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    法律状态:
    2015-01-06| B03A| Publication of an application: publication of a patent application or of a certificate of addition of invention|
    2018-03-27| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-07-09| B06T| Formal requirements before examination|
    2020-07-07| B25A| Requested transfer of rights approved|Owner name: GUARDIAN GLASS, LLC (US) |
    2020-08-25| B09A| Decision: intention to grant|
    2020-12-29| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 27/12/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/644,320|US8940399B2|2012-10-04|2012-10-04|Coated article with low-E coating having low visible transmission|
    US13/644,320|2012-10-04|
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