Coated substrate

Abstract

Coated substrate comprising a substrate (1) with a functional multilayer coating (2) arranged over a surface on it, in particular a solar and / or heat protection coating, characterized in that the functional multilayer coating (2) comprises a three-layer combination (3) of the sequence TiCx (3a) / TiN (3b) / AIN (3c), wherein the three-layer combination (3) is arranged between a first dielectric (4a) and a second dielectric (4b) and the layer sequence is arranged starting from the substrate (1). A) first dielectric (4a) / TiCx (3a) / TiN (3b) / AIN (3c) / second dielectric (4b) or B) first dielectric (4a) / AIN (3c) / TiN (3b) / TiCx (3a) / second dielectric (4b) is formed.

Description

[0001] The invention relates to a glazing with an improved sun and heat protection coating.

[0002] Sun protection coatings for automotive roof windows with very low transmission (TL) between 0.5% and 12%, good aging resistance, and low total transmitted heat radiation (TTS) are often manufactured using a combination of two heavily tinted glass panes laminated together to form a composite pane and a low-E coating on the interior surface of the inner pane. This coating is based on transparent conductive oxides (TCOs), such as indium tin oxide (ITO) or antimony tin oxide. The tinted glass absorbs solar energy, and the properties of the TCO (low-E) coating reduce the re-emission of heat energy into the vehicle's interior.Besides the requirement for heavily tinted glass panes, the use of TCO coatings is also problematic, as these have a relatively low specific conductivity and require comparatively thick layers of an expensive material. Furthermore, the commonly used TCO (indium tin oxide) poses a risk of supply chain disruptions due to limited available reserves, a highly relevant issue for industrial mass production.

[0003] The possibilities for achieving the lowest possible TTS values ​​(total transmitted thermal radiation) with an absorbing glass with a low-E coating are limited. The high absorption leads to a high heat input into the glass, and the heat transfer can only be partially compensated for by reducing the emissivity.

[0004] To achieve lower TTS values ​​in laminated glass units, a tinted outer pane can be replaced with a clear glass pane. A silver-based IR-reflective coating is applied to side II, the interior surface of this outer pane, drastically reducing heat transfer into the laminated glass unit and thus resulting in a significantly lower TTS value. To achieve the desired low TL transmission value without a tinted outer pane, a colored thermoplastic interlayer, such as a colored PVB film, can be used.

[0005] Functional IR-reflective silver coatings, TCO coatings, and electrically conductive coatings of this type are highly susceptible to corrosion and must therefore be hermetically sealed and protected from moisture and chemical degradation. To achieve this, such a functional coating is removed along a circumferential, frame-shaped area of ​​the laminated glass. This removal is typically carried out in a complex and time-consuming process involving mechanical abrasion, for example, by grinding with a grinding wheel. Another equally complex method is the application of a reactive black ink to the edge area. The uncoated area inside the laminated glass is hermetically sealed by the thermoplastic interlayer or an acrylate adhesive, which acts as a vapor barrier.The vapor barrier protects the corrosion-sensitive functional coating from moisture and atmospheric oxygen. Applying functional silver or TCO coatings to the exposed surfaces of a laminated glass unit is practically impossible.

[0006] FR 3 127 490 A1 discloses material comprising a substrate coated with a functional coating comprising at least one titanium nitride-based functional layer and at least two dielectric coatings, wherein each dielectric coating comprises at least one dielectric layer such that each functional layer is arranged between two dielectric coatings, wherein the dielectric coating located directly beneath a functional layer comprises a dielectric layer in contact with the functional layer and which is selected from an aluminum nitride-based layer and / or a zinc oxide-based layer.

[0007] US 5 112 675 A discloses a heat-absorbing glazing intended for automobiles, consisting of clear or tinted glass coated with a layer of titanium carbide and an ITO top layer applied by cathode sputtering.

[0008] The object of the invention is to provide a substrate, in particular a glazing, with an improved solar and heat protection coating that exhibits high chemical and mechanical stability and, in particular, offers good solar and heat protection efficiency even at low transmission values. Furthermore, the coating should be simple, sustainable, and cost-effective to manufacture.

[0009] These and other problems are solved according to the invention by a coated substrate according to independent claim 1 and a composite disk according to claim 10. Advantageous embodiments of the invention are described in the dependent claims.

[0010] According to the invention, a coated substrate comprising a substrate with a functional multilayer coating, in particular a solar and / or heat protection coating, arranged over an area thereon, is provided, wherein the functional multilayer coating comprises a three-layer combination of the sequence titanium carbide (TiCx) / titanium nitride (TiN) / aluminum nitride (AlN), wherein the three-layer combination is arranged between a first and a second dielectric and the layer sequence is arranged starting from the substrate. A) first dielectric / TiCx / TiN / AIN / second dielectric or B) first dielectric / AIN / TiN / TiCx / second dielectric is trained.

[0011] The three-layer combination can also be referred to as a three-layer stack.

[0012] According to the invention, a coated substrate is provided that possesses outstanding functional, optical, energetic, and chemical properties, particularly for applications in the automotive sector, for example, and is simultaneously easy and cost-effective to produce. Furthermore, the raw materials required for the functional multilayer coating are sustainable, readily available, and abundant, so that disruptions in supply chains are not a concern. Expensive and less readily available coating materials such as silver or indium tin oxide (ITO) can be replaced without any loss of quality.

[0013] The central element of the functional multilayer coating according to the invention is the three-layer combination of AIN / TiN / TiCx. This three-layer combination, which can also be called a three-layer stack, offers a surprisingly large number of advantageous properties. Firstly, the combination of TiN and TiCx allows the overall color, reflectivity, and transmission of the coating to be adjusted, particularly in systems requiring low transmission of, for example, 2% to 20%, such as roof or side windows in vehicles. Furthermore, superimposed layers of TiCx and TiN can exhibit high conductivity because they have the same crystal structure and can grow epitaxially on top of each other. TiCx and AIN form a nucleation and growth layer for the TiN layer and simultaneously a protective oxygen diffusion barrier layer.This allows the titanium nitride layer to be thinner than would be possible on its own. Furthermore, the coating, comprising the three-layer stack AIN / TiN / TiCx, can be used not only as an IR-reflective layer but also as an electrically conductive layer, for example, as a heating layer for a composite windshield in a vehicle. The three-layer combination and the coating as a whole are composed of particularly robust, mechanically and chemically stable layer materials. Advantageously, the coating according to the invention does not require the time-consuming and complex edge stripping necessary, as is the case, for example, with silver layers, to prevent corrosion and degradation. This also contributes significantly to reducing the complexity and cost of the manufacturing process.

[0014] The three-layer stack AIN / TiN / TiCx, a functional IR-reflective multilayer combination with low emissivity, forms the core element of the substrate coating. This three-layer combination, when applied to substrates or used in conjunction with laminated glass, achieves low emissivity (< 35%), very low transmission, and consequently, an outstandingly good TTS value (< 20%) (total transmitted thermal radiation, measured according to ISO 13837). This is achieved without compromising the optical appearance, for example, with regard to reflectivity or reflection colors. Undesirable color shifts in reflection and transmission are avoided.

[0015] According to the invention, the three-layer stack AIN / TiN / TiCx is arranged in a sandwich-like manner between a first and a second dielectric, each comprising at least one dielectric layer. The first dielectric, i.e., at least one dielectric layer, is arranged on the surface of the substrate and can also be referred to as the base layer. This improves adhesion to the substrate and also serves as a diffusion barrier layer. The second dielectric, i.e., at least one dielectric layer, serves as a diffusion barrier and protective layer for the functional three-layer combination. Furthermore, all dielectric layers serve to customize the optical appearance.

[0016] In a preferred embodiment, the titanium nitride (TiN) layer of the three-layer combination has a thickness in the range of 10 nm to 60 nm, preferably from 20 nm to 50 nm, and particularly preferably from 25 nm to 45 nm. Titanium nitride as a material is hard and oxidation-stable and exhibits very good electrical and thermal conductivity for a ceramic material. Thin TiN layers can be produced, for example, by reactive sputtering and then exhibit an attractive blue transmission color, high IR reflectivity, and low emissivity.

[0017] In a further preferred embodiment, the aluminium nitride (AIN) layer of the three-layer combination has a layer thickness in the range of 1 nm to 15 nm, preferably from 2 nm to 10 nm, particularly preferably from 3 nm to 9 nm.

[0018] In a further preferred embodiment, the titanium carbide (TiCx) layer of the three-layer combination has a layer thickness in the range of 1 nm to 30 nm, preferably from 1 nm to 20 nm, particularly preferably from 1 nm to 15 nm, and most preferably from 4 nm to 15 nm.

[0019] Another preferred embodiment of the substrate according to the invention provides that the first dielectric and / or the second dielectric is configured as a single dielectric layer or as multiple layers. In other words, the first dielectric and the second dielectric can be configured independently of one another as a single layer or as multiple layers, i.e., as two or more dielectric layers arranged one above the other. These dielectric layers can be made of the same or different dielectric materials and / or have the same or different layer thicknesses.

[0020] The first dielectric and / or the second dielectric can be a material selected from silicon nitride (Si3N4), silicon oxynitride (SiOxNy), silicon zirconium nitride, silicon carbide, silicon oxide, metal oxide, metal nitride, metal carbide, or a combination thereof. For the metal oxides, metal nitrides, and metal carbides, the metal can be, for example, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, or tungsten. For the fabrication of the base layer, i.e., the first dielectric layer, known vapor deposition processes such as physical vapor deposition (PVD), in particular sputtering, preferably magnetron sputtering, chemical vapor deposition (CVD), or atomic layer deposition (ALD) can be used.

[0021] In a preferred embodiment, the first dielectric and / or the second dielectric preferably contains or is formed from silicon nitride (Si3N4), silicon oxynitride (SiOxNy) or silicon zirconium nitride.

[0022] For the production of dielectric layers, known gas phase deposition processes such as PVD, in particular sputtering, preferably magnetron sputtering, CVD or ALD can be used.

[0023] In another embodiment preferred according to the invention, the first dielectric and / or the second dielectric has a high refractive index of greater than 1.6, preferably greater than 1.9.

[0024] It is also possible to use dielectric materials for the first dielectric and / or the second dielectric that have a lower refractive index between 1.6 and 1.3, however a high refractive index is preferred.

[0025] Refractive indices are generally specified within the scope of the present invention with reference to a wavelength of 550 nm. Methods for determining refractive indices are known to those skilled in the art. The refractive indices specified within the scope of the invention can, for example, be determined by ellipsometry, using commercially available ellipsometers.

[0026] In preferred embodiments, the substrate is a transparent or colored substrate made of glass, glass ceramic or a transparent plastic.

[0027] In a preferred embodiment of the coated substrate according to the invention, the functional multilayer coating is electrically conductive and can be heated by applying current and voltage. In other words, the functional multilayer coating is functionally connected to a current and voltage source and corresponding connections and / or wires. For example, a voltage in the range of 42 V to 48 V or even 300 V to 400 V, which is commonly available in electric vehicles, can be used. This is particularly advantageous for defrosting or removing moisture from fogged windows, especially when the coated substrate is used, for example, for rear or side windows in vehicles.Since a voltage of 300 V to 400 V or even up to 500 V is available directly in such vehicles via the primary battery, i.e. via the vehicle electrical system, an expensive DC / DC converter is advantageously not required in this case.

[0028] Furthermore, a functional connection for communication with a control unit such as the on-board computer of a vehicle can still be established in a visually unobtrusive or wireless manner in a known way.

[0029] The invention also relates to a composite pane, in particular for a vehicle or a building, comprising an outer pane with an outer surface and an inner surface, and an inner pane with an outer surface and an inner surface, which are connected to each other by a thermoplastic intermediate layer, wherein the outer pane and / or the inner pane is designed as a coated substrate according to the invention comprising a substrate with a functional multilayer coating, in particular with at least one solar control and / or heat protection coating, as described above in various configurations and embodiments.

[0030] The laminated glass pane is designed to separate an interior space, particularly the interior of a vehicle or building, from the external environment within a window opening. The laminated glass pane comprises a first and a second pane, which, according to the invention, are referred to as the outer pane and inner pane, respectively, and are bonded together via a thermoplastic interlayer. For the purposes of the invention, the inner pane is the pane facing the interior space when installed. The outer pane is the pane facing the external environment when installed. The interior surface (or inner surface) is understood to be the surface of the panes that faces the interior space when installed.For the purposes of the invention, the outer surface (or outside or outer surface) is understood to be the surface of the discs which, in the installed position, faces the external environment.

[0031] The surfaces of the panes are typically designated as follows: The outer surface of the outer pane is designated as Side I. The inner surface of the outer pane is designated as Side II. The outer surface of the inner pane is designated as Side III. The inner surface of the inner pane is designated as Side IV.

[0032] The outer and inner panes are preferably made independently of each other from glass or plastic, preferably soda-lime glass, alkali aluminosilicate glass, polycarbonate, or polymethacrylate. In a particularly preferred embodiment, the outer and inner panes are made of glass.

[0033] Suitable glass panes include glass panes known under the trade names Planiclear and Planilux (each clear glass), VG 10, VG20, VG40 or TSANx, TSA3+, TSA4+ from Saint-Gobain, the VG series being grey tinted glass and the TSA series being green tinted glass.

[0034] The outer disc and / or the inner disc preferably have a thickness of 0.1 to 4 mm, preferably of 1 to 4 mm, and particularly preferably of 1.6 mm to about 2.1 mm, independently of each other.

[0035] The interior surface of the outer pane and the exterior surface of the inner pane face each other and are connected by means of the thermoplastic intermediate layer.

[0036] The thermoplastic interlayer is formed by one or more thermoplastic films, whereby the individual films in the resulting composite sheet may no longer be distinguishable from one another. The thermoplastic films preferably contain polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyurethane (PU), and / or mixtures thereof and / or copolymers thereof, particularly preferably polyvinyl butyral. The films are preferably based on the aforementioned materials but may contain further components, for example, plasticizers, colorants, IR or UV absorbers. The thermoplastic films can be clear, transparent, colored, or tinted PVB films.

[0037] The individual polymer films of the interlayer, in particular the PVB films, preferably have a thickness of approximately 0.2 mm to 1 mm, for example 0.38 mm, 0.76 mm or 0.81 mm. Further properties of the laminated glass pane can be influenced by the thickness of the films. For example, thicker PVB films result in improved sound insulation, especially if they contain an acoustically effective core, increased burglar resistance of the laminated glass pane, and also increased protection against ultraviolet radiation (UV protection).

[0038] For the purposes of the present invention, "transparent" means that the overall transmission of the laminated glass complies with legal requirements (for example, the European Union directive ECE-R43) and preferably has a transmittance of more than 50% and, in particular, more than 60%, for example, more than 70%, for visible light. Correspondingly, "opaque" means a light transmission of less than 10%, preferably less than 5%.

[0039] In a preferred embodiment of the composite glass according to the invention, the functional multilayer coating is formed on the interior surface of the outer pane and / or on the interior surface of the inner pane. The functional multilayer coating, comprising the three-layer combination AIN / TiN / TiCx, can thus advantageously replace a conventional IR-reflective TCO or silver layer as a solar control coating on the interior surface of the outer pane and / or a conventional low-E coating (heat-insulating coating) on ​​the interior surface of the inner pane. Furthermore, in a preferred embodiment, the functional multilayer coating is arranged on both the interior surface of the outer pane and the interior surface of the inner pane.The functional multi-layer coating according to the invention is so robust and stable that it can also be applied to the inside of the inner pane without any problems.

[0040] In one embodiment of the composite pane according to the invention, the functional multilayer coating is formed on the interior surface of the outer pane, and a conventional low-E coating is formed on the interior surface of the inner pane. The functional multilayer coating, comprising the three-layer combination AIN / TiN / TiCx, can thus advantageously replace a conventional IR-reflective TCO or silver layer as a solar control coating on the interior surface of the outer pane. A conventional low-E coating as a heat-reflecting coating of the composite pane on the interior surface of the inner pane preferably comprises a functional layer containing a transparent conductive oxide (TCO), preferably indium tin oxide (ITO) or tin oxide (SnO2), which is arranged between dielectric layers.The dielectric layers can be formed in particular from dielectric oxides or nitrides, such as ZnO, SnZnO, AIN, TiO2, SiO2 or Si3N4. Such conventional low-E coatings are known, for example, from WO2013 / 127563 A1 or WO2019 / 110172 A1.

[0041] A method for producing a coated substrate according to the invention, as well as a composite disk containing at least one such coated substrate according to the invention, as described above in various embodiments and configurations, comprises at least the steps A) Providing at least one substrate, B) Applying a first dielectric comprising at least one dielectric layer to the substrate, C) Application of a three-layer combination of TiCx / TiN / AIN onto the first dielectric applied in step B D) Application of a second dielectric comprising at least one dielectric layer to the three-layer combination, in step C) starting from the substrate, a layer sequence TiCx / TiN / AIN or AIN / TiN / TiCx is formed.

[0042] In a preferred embodiment of the process, the titanium nitride (TiN) layer is produced in step C) by high-power impulse magnetron sputtering (HiPIMS). This allows for the production of particularly conductive layers, which is advantageous for IR reflectivity. Furthermore, it results in particularly hard and tough layers with exceptionally good adhesion.

[0043] In one embodiment, the process according to step D) includes a heat treatment (tempering), preferably at a temperature of 300°C to 800°C.

[0044] A coated substrate and a composite pane according to the invention, as described above in various embodiments and combinations, can be used in buildings or as vehicle windows in means of transport for land, air, or water travel, in particular as window panes in motor vehicles, especially as roof panes, rear windows, or side windows. Use as a roof pane is particularly preferred.

[0045] Within the scope of the present invention, preferred embodiments mentioned for individual features can also be freely combined with one another, provided that they are not contradictory or are exclusively mentioned and described as alternatives to each other. This also applies to features mentioned only in relation to the coated substrate or the composite disc or to the manufacturing process.

[0046] The invention is described in more detail below with reference to the examples and figures. It should be noted that different aspects are described, each of which can be used individually or in combination. That is, each aspect can be used with different embodiments of the invention, unless explicitly presented as a pure alternative.

[0047] The drawings are simplified, schematic representations and are not to scale. The drawings do not limit the invention in any way.

[0048] They show: Fig. 1 a schematic cross-section through a first embodiment of a substrate according to the invention with the functional multilayer coating; Fig. 2 the transmission spectrum of the coated substrate from Example 1; Fig. 3 the reflection spectrum of the coated substrate from Example 1; Fig.4 a schematic cross-section through an embodiment of a composite disc according to the invention with two functional multilayer coatings; Fig. 5 a schematic cross-section through another embodiment of a composite disc according to the invention with a functional multilayer coating and a conventional low-E coating. Fig. 6 the computer-simulated transmission spectrum of the composite disk from Example 2; Fig. 7 the computer-simulated reflection spectrum of the composite disk from Example 2; Fig. 8 the computer-simulated transmission spectrum of the composite disk from Example 3; Fig. 9 the computer-simulated reflection spectrum of the composite disk from Example 3; Fig. 10 the computer-simulated transmission spectrum of the composite disk from Example 4; Fig.11 the computer-simulated reflection spectrum of the composite disk from Example 4; Fig. 12 the computer-simulated transmission spectrum of the composite disk from Example 5; Fig. 13 the computer-simulated reflection spectrum of the composite disk from Example 5; Fig. 14 the computer-simulated transmission spectrum of the composite disk from Example 6; Fig. 15 the computer-simulated reflection spectrum of the composite disk from Example 6 Fig. 16 a schematic cross-section through an embodiment of a composite disk 300 according to the invention with a functional multi-layer coating.

[0049] Fig.Figure 1 shows a schematic cross-section through an embodiment of a coated substrate according to the invention, consisting of a substrate 1 with a functional multilayer coating 2 arranged thereon, comprising the three-layer combination 3 of a TiCx layer 3a, a TiN layer 3b, and an AIN layer 3c, as well as a first dielectric 4a and a second dielectric 4b. The first dielectric 4a and the second dielectric 4b surround the three-layer combination 3 in a sandwich-like manner. The first dielectric 4a is arranged on the surface of the substrate 1, and the second dielectric 4b is arranged on the AIN layer 3c. The first dielectric 4a and the second dielectric 4b are schematically depicted as a single layer, but in other embodiments they can also be multilayered, with several layers of dielectric material arranged one above the other.In another embodiment, the sequence of layers in the three-layer combination 3, starting from the substrate 1, can also be formed in the sequence AIN-TiN-TiCx.

[0050] Example 1 and Table 1 show an exemplary implementation of the Fig. Figure 1 shows an embodiment of a coated substrate according to the invention. Example 1 Table 1: Optical properties and emissivity of a tempered substrate according to the invention Substrate with coating TL[%] a*TL b*TL RLc[%] a*RLc b*RLc RLg[%] a*RLg b*RLg ε[%] 2 mm PLC (glass) / 35 nm Si3N4 / 5 nmTiCx / 15 nm TiN / 5 nm AIN / 35 nmSi3N4 51,0 -3,4 -5,0 5,1 9,3 17,1 13,4 -1,7 -3,9 28,9

[0051] Table 1 shows the structure and optical properties of the glass substrate coated according to the invention (PLC = Planiclear from Saint Gobain) after heat treatment (tempering) for 8 minutes at 640 °C.

[0052] It means - TL the integrated light transmittance according to DIN 5033-7:2014-10 (light type A) measured with an incident angle of 0° and an observation angle of 2° over a wavelength range of 380 nm to 780 nm; - a*TL and b*TL the values ​​of the transmission color in the L*a*b* color space determined according to DIN 5033-7:2014-10 and DIN 6174, whereby the view is directed towards the surface of the substrate 1 coated with the functional multilayer coating 2, measured with an incident angle of 0° and an observation angle of 2° (light type D65) over a wavelength range from 380 nm to 780 nm; - RLg the integrated reflectance according to DIN 5033-7:2014-10, where the measurement refers to the uncoated surface of the substrate 1, with an incident angle of 8° and an observation angle of 10° (light type A) over a wavelength range from 380 nm to 780 nm; - a*RLg and b*RLg are the values ​​of the reflection color in the L*a*b* color space determined according to DIN 5033-7:2014-10 and DIN 6174, where the measurement refers to the uncoated surface of the substrate 1, measured with an incident angle of 8° and an observation angle of 10° (light type D65) over a wavelength range from 380 nm to 780 nm; - RLc is the integrated reflectance according to DIN 5033-7:2014-10, where the measurement refers to the surface of the substrate 1 coated with the functional multilayer coating 2 with an incident angle of 8° and an observation angle of 10° (light type A) over a wavelength range from 380 nm to 780 nm; - a*RLc and b*RLc are the values ​​of the reflection color of the surface of the substrate 1 coated with the functional multilayer coating 2 in the L*a*b* color space determined according to DIN 5033-7:2014-10 and DIN 6174, measured with an incident angle of 8° and an observation angle of 10° (light type D65) over a wavelength range from 380 nm to 780 nm; - ε the normal emissivity at 283 K according to DIN EN 16012:2015-05 based on a measurement of the surface of substrate 1 coated with the functional multilayer coating 2.

[0053] Unless otherwise stated, the standards cited are always those in the version valid on the filing date.

[0054] The transmission and reflection spectra belonging to the embodiment according to Example 1 are shown in Fig. 2 and Fig. Figure 3 shows the simulated values ​​(TL sim, RLc sim, RLg sim) and the measured values ​​(TL ex, RLc ex, RLg ex). From the in Fig. 2 and Fig. The transmission and reflection spectra shown in Figure 3 show that the deviation of the simulated spectra from the measured spectra is very small.

[0055] Fig.Figure 4 shows a schematic cross-section through an embodiment of a composite pane 100 according to the invention with two functional multilayer coatings 2. The composite pane 100 comprises an outer pane 1a and an inner pane 1b, which are connected to each other via a thermoplastic intermediate layer 5. The composite pane 100 can, for example, be provided as a roof pane of a passenger car, wherein the outer pane 1a faces the external environment and the inner pane 1b faces the vehicle interior. The outer pane 1a has an outer surface I and an inner surface II. The inner pane 1b has an outer surface III and an inner surface IV. The outer surfaces I and III face the external environment, the inner surfaces II and IV face the vehicle interior. The inner surface II of the outer pane 1a and the outer surface III of the inner pane 1b face each other. In the Fig.In the embodiment shown in Figure 4, the outer pane 1a is designed as a coated substrate according to the invention with a multi-layer coating 2 arranged on the inner surface II of the outer pane 1a and the inner pane 1b as a coated substrate according to the invention with a multi-layer coating 2-1 arranged on the inner surface IV of the inner pane 1b.

[0056] Fig.Figure 5 shows a schematic cross-section through an embodiment of a composite pane 200 according to the invention, comprising a functional multilayer coating 2 and a conventional low-E coating 6. The composite pane 200 comprises an outer pane 1a and an inner pane 1b, which are connected to each other via a thermoplastic intermediate layer 5. The composite pane 200 can, for example, be provided as a roof pane of a passenger car, wherein the outer pane 1a faces the external environment and the inner pane 1b faces the vehicle interior. The outer pane 1a has an outer surface I and an inner surface II. The inner pane 1b has an outer surface III and an inner surface IV. The outer surfaces I and III face the external environment, and the inner surfaces II and IV face the vehicle interior. The inner surface II of the outer pane 1a and the outer surface III of the inner pane 1b face each other. In the Fig.In the embodiment shown in Figure 5, the outer disc 1a is designed as a coated substrate according to the invention with a multi-layer coating 2 arranged on the inner surface II of the outer disc 1a and the inner disc 1b as a substrate with a conventional low-E coating 6 arranged on the inner surface IV of the inner disc 1b.

[0057] For the following examples, the (layer) stack structure of the functional coatings (layers and layer thicknesses) is given in Tables 2 to 6, and the optical properties of the finished laminated glass panes are given in Table 7. All optical, aesthetic, and energetic properties of the laminated glass panes according to the invention in Examples 2 to 6 were measured in the laminated and tempered state, or calculated by computer simulation for a laminated and tempered laminated glass pane.

[0058] In examples 2 to 4, the functional multilayer coating 2 according to the invention, in particular a solar control coating, comprising the three-layer stack 3 of a TiCx layer 3a, a TiN layer 3b and an AIN layer 3c arranged between a first dielectric 4a and a second dielectric 4b, was applied to the inside II of a clear outer pane 1a (example Planiclear, PLC from Saint Gobain). To achieve the desired low transmission TL, a tinted PVB film was used for the thermoplastic intermediate layer 5 and laminated to the composite disc 100 with another clear inner disc 1b (for example, Planiclear, PLC from Saint Gobain), which on the inside IV carries a functional multilayer coating 2-1 comprising the three-layer stack 3-1 arranged between a first dielectric 4a-1 and a second dielectric 4b-1, consisting of a TiCx layer 3a-1, a TiN layer 3b-1 and an AIN layer 3c-1. Example 2 Table 2: Structure of a composite disc 100 according to the invention with a blue colored PVB intermediate layer and 2% TL. Shift sequence Layer material Layer thickness Outer pane 1a Glass (PLC) 2.1 mm First dielectric 4a Si3N4 23.2 nm SiZr(27)Nx 30.4 nm Three-layer stack 3 TiCx 7.0 nm TiN 33.3 nm AIN 8.5 nm Second dielectric 4b Si3N4 24.2 nm Thermoplastic intermediate layer 5 PVB colored blue 0.76 mm Inner disc 1b Glass (PLC) 2.1 mm First dielectric 4a-1 Si3N4 15.5 nm Three-layer stack 3-1 TiCx 2.0 nm TiN 21.4 nm AIN 5.5 nm Second dielectric 4b-1 SiZr(27)Nx 24.0 nm SiO2 47.9 nm

[0059] In this embodiment of the invention, two clear glass panes 1a, 1b are laminated with a blue-tinted PVB film as a thermoplastic interlayer 5, optimized for a transmission of 2% to the laminated pane 100. The functional multilayer coating 2 applied to the inner surface II of the outer pane 1a comprises the three-layer combination 3 arranged between a first dielectric 4a and a second dielectric 4b in the stack TiCx / TiN / AlN, acts in particular as a solar control coating and leads to a reduced heating of a vehicle interior and the inner pane 1b due to the reflection of infrared radiation.In addition to achieving good TTS values ​​and emissivities (thermal comfort) compared to previously known systems, the functional multilayer coating 2 also provides the laminated pane 100 with good optical and aesthetic properties, in particular aesthetically pleasing transmission and reflection colors (Table 7). In this embodiment, a further functional multilayer coating 2-1, comprising the three-layer combination TiCx 3a-1 / TiN 3b-1 / Ain 3c-1 arranged between a first dielectric 4a-1 and a second dielectric 4b-2, is formed on the inner surface IV of the inner pane 1b and arranged as a low-E / heat-insulating coating. In this preferred embodiment, the laminated pane 100 exhibits not only good emissivity of approximately 25%, but also a particularly low total transmitted thermal radiation (TTS) of approximately 15%.The heat-insulating coating on the inner surface IV of the inner pane 1b reduces the emission of heat radiation through the laminated glass 100 into the vehicle interior, particularly at high outside temperatures. Conversely, the heat-insulating coating can reduce the emission of heat radiation from the vehicle interior at low outside temperatures. Furthermore, the heat-insulating coating can reduce the transmission of visible light into the vehicle interior, thus eliminating the need for tinted glass or reducing the need for tinted glass when such reduced transmission is desired, for example, in the case of roof windows. These are significant advantages of the laminated glass according to the invention, as they considerably improve the interior climate of the vehicle and reduce the need for air conditioning.The functional multilayer coatings 2, 2-1 are advantageously particularly robust and resistant, thus eliminating the need for complex edge stripping, especially to prevent corrosion. This represents a significant simplification of the process. Furthermore, the materials used for the functional multilayer coatings 2, 2-1 are particularly inexpensive and widely available. Any potential disruption in the supply chains is therefore avoidable.

[0060] The transmission and reflection spectra corresponding to Example 2 are shown in Fig. 6 and Fig. 7 shown. Example 3 Table 3: Structure of a composite disc 100 according to the invention with a grey colored PVB intermediate layer and 4% TL. Shift sequence Layer material Layer thickness Outer pane 1a Glass (PLC) 2.1 mm First dielectric 4a Si3N4 23.2 nm SiZr(27)Nx 30.4 nm Three-layer stack 3 TiCx 7.0 nm TiN 33.3 nm AIN 8.5 nm Second dielectric 4b Si3N4 24.2 nm Thermoplastic intermediate layer 5 PVB colored grey 0.76 mm Inner disc 1b Glass (PLC) 2.1 mm First dielectric 4a-1 SiZr(27)Nx 14.8 nm Three-layer stack 3-1 TiCx 1.0 nm TiN 25.1 nm AIN 4.0 nm Second dielectric 4b-1 SiZr(27)Nx 27.1 nm SiO2 40.7 nm

[0061] The structure of this composite pane 100 is analogous to that in Example 2, except that the blue-tinted PVB film for the thermoplastic intermediate layer 5 was replaced by a more readily available gray-tinted PVB film, and the materials and / or layer thicknesses of the individual layers of the functional multilayer coating 2-1 were changed. This resulted in a less neutral transmission color compared to the previous example (Table 7). However, in this embodiment, the composite pane 100 also exhibits good energy performance with a good emissivity of approximately 25% and a particularly low total transmitted thermal radiation (TTS) of approximately 15%. This results in the aforementioned advantages of, on the one hand, reduced heat radiation from the composite pane 100 into the vehicle interior, especially at high ambient temperatures, and, on the other hand, reduced heat radiation from the vehicle interior at low ambient temperatures.

[0062] The transmission and reflection spectra corresponding to Example 3 are shown in Fig. 8 and Fig. 9 shown. Example 4 Table 4: Example of the structure of a composite disc 100 according to the invention with a blue colored PVB intermediate layer 5 and 2% TL. Shift sequence Layer material Layer thickness Outer pane 1a Glass (PLC) 2.1 mm First dielectric 4a SiZr(27)Nx 51.8 nm Three-layer stack 3 TiCx 1.0 nm TiN 42.9 nm AIN 4.3 nm Second dielectric 4b Si3N4 43.7 nm Thermoplastic intermediate layer 5 PVB colored blue 0.76 mm Inner disc 1b Glass (PLC) 2.1 mm First dielectric 4a-1 Si3N4 21.9 nm Three-layer stack 3-1 TiCx 1.0 nm TiN 23.9 nm AIN 4.0 nm Second dielectric 4b-1 SiZr(27)Nx 26.4 nm SiO2 51.0 nm

[0063] In this embodiment of the invention, two clear glass panes 1a, 1b with a blue-tinted thermoplastic interlayer 5 made of PVB, optimized for a transmission of 2%, were laminated to the composite pane 100. The composite pane 100 with the structure shown in Table 4 is characterized by low internal reflection and aesthetically pleasing transmission color, combined with good emissivity and a particularly low total transmitted thermal radiation (TTS) of approximately 13% with high external reflectivity (Table 7).

[0064] The transmission and reflection spectra corresponding to Example 4 are shown in Fig. 10 and Fig. 11 shown. Example 5 Table 5: Structure of an embodiment of a composite disc 200 according to the invention with a functional multilayer coating 2 on the outer disc 1a and a conventional low-E coating 6 on the inner disc 1b. Shift sequence Layer material Layer thickness Outer pane 1a Glass (PLC) 2.1 mm First dielectric 4a Si3N4 23.2 nm SiZr(27)Nx 30.4 nm Three-layer stack 3 TiCx 7.0 nm TiN 33.3 nm AIN 8.5 nm Second dielectric 4b Si3N4 24.2 nm Thermoplastic intermediate layer 5 PVB (clear) 0.76 mm Inner disc 1b Glass tinted grey (VG10) 2.1 mm Conventional Low-E coating 6 Si3N4 30 nm SiO2 15 nm ITO (Indium Tin Oxide) 75 nm Si3N4 15 nm SiO2 45 nm

[0065] In this embodiment of the invention, the functional multilayer coating 2 on the inner surface II of the outer pane 1a is structured in a layer sequence and layer thicknesses analogous to that in Example 2. However, in this example, a gray-tinted glass is used as the inner pane 1b, and a clear PVB film is used as the intermediate layer 5. In contrast to Example 2, a conventional low-E coating 6 is applied to the inner surface IV of this tinted inner pane 1b. This coating comprises a comparatively thick layer based on indium tin oxide, which is sandwiched between two dielectric layers 8a, 8b, 8c, and 8d. An emissivity ε of approximately 33% and good thermal performance were achieved, as well as a total transmitted thermal radiation (TTS) of approximately 18%, based on the color values ​​for transmission, internal reflection, and external reflection (TTS) (Table 7).

[0066] The transmission and reflection spectra corresponding to Example 5 are shown in Fig. 12 and Fig. 13 shown. Example 6 Table 6: Structure of an embodiment of a composite disc 200 according to the invention with a functional multilayer coating 2 on the outer disc 1a and a conventional low-E coating 6 on the inner disc 1b Shift sequence Layer material Layer thickness Outer pane 1a Glass (PLC) 2.1 mm First dielectric 4a SiZr(27)Nx 51.8 nm Three-layer stack 3 TiCx 3a 1.0 nm TiN 3b 42.9 nm AIN 3c 4.3 nm Second dielectric 4b Si3N4 43.7 nm Thermoplastic intermediate layer 5 PVB (clear) 0.76 mm Inner disc 1b Glass tinted grey (VG10) 2.1 mm Conventional Low-E coating 6 Si3N4 30 nm SiO2 15 nm ITO (Indium Tin Oxide) 75 nm Si3N4 15 nm SiO2 45 nm

[0067] The functional multilayer coating 2 on the inner surface II of the outer pane 1a is structured in layer sequence and layer thicknesses analogous to that in Example 4. However, in this example, a gray-tinted glass is used as the inner pane 1b, and a clear PVB film is used as the intermediate layer 5. In contrast to Example 4 (as in Example 5), a conventional low-E coating 6 is applied to the inner surface IV of this tinted inner pane 1b. This coating comprises a comparatively thick layer based on indium tin oxide, which is sandwiched between two dielectric layers 8a, 8b, 8c, and 8d.It is evident that this laminated glass 200, with the functional multilayer coating 2 applied to surface II of the outer pane 1a, exhibits good thermal performance and good optical quality in terms of color values ​​for transmission, as well as internal and external reflection (Table 7). However, the conventional low-E coating 6 is thicker than the functional multilayer coating 2 and, due to the expensive indium tin oxide 7, also more costly. Furthermore, especially for use as a laminated glass 200 in vehicles, the indium tin oxide-based low-E coating 6 must be laboriously removed from the edges by a stripping process, as it is susceptible to corrosion.This can be completely eliminated in the case of a functional multilayer coating 2, which is also based on significantly less expensive raw materials, since the materials of the three-layer stack 3 used as the core element are robust, thermally and chemically stable. Therefore, the manufacturing process is also considerably simplified. The same applies to the design in Example 5.

[0068] The transmission and reflection spectra corresponding to Example 6 are shown in Fig. 14 and Fig. 15 shown. Table 7 Optical and thermal properties and behavior of the layer stacks laminated to form composite discs from examples 2 to 6. Example 2 Example 3 Example 4 Example 5 Example 6 TL [%] 2,0 3,7 2 6,2 5,7 a*TL -2,3 -1,2 -2,2 -3,5 -2,8 b*TL -4,3 -9,9 -4,0 -3,1 0,3 RLin [%] 4,0 3,7 4,0 5,4 5,4 a*RLin -2,9 0,2 2,0 1,8 1,7 b*RLin -12,1 -15 -15,0 -12,9 -14,1 RLout [%] 15,0 14,3 30,0 14,1 29,9 a*RLout 2,0 2,7 -2,8 2,8 -2,8 b*RLout 0,5 -2,0 -2,4 -2,1 -5,3 ε [%] ~25 ~25 ~25 ~33 ~33 TTS [%] ~15 ~15 ~13 ~18 ~15

[0069] It means: - TL the integrated light transmittance according to DIN 5033-7:2014-10 (light type A) measured with an incident angle of 0° and an observation angle of 2° over a wavelength range of 380 nm to 780 nm; - a*TL and b*TL the values ​​of the transmission color in the L*a*b* color space determined according to DIN 5033-7:2014-10 and DIN 6174, where the view is directed towards the coated surface B of the inner pane 1b, measured with an incident angle of 0° and an observation angle of 2° (light type D65) over a wavelength range from 380 nm to 780 nm; - RLin the integrated reflectance according to DIN 5033-7:2014-10, where the measurement refers to the coated surface B of the inner pane 1b, with an incident angle of 8° and an observation angle of 10° (light type A) over a wavelength range from 380 nm to 780 nm; - a*RLin and b*RLin the values ​​of the reflection color in the L*a*b* color space determined according to DIN 5033-7:2014-10 and DIN 6174, whereby the measurement refers to the coated surface B of the inner pane 1b, with an incident angle of 8° and an observation angle of 10° (light type D65) over a wavelength range from 380 nm to 780 nm; - RLout is the integrated reflectance according to DIN 5033-7:2014-10, where the measurement refers to the uncoated surface A of the outer pane 1a, with an incident angle of 8° and an observation angle of 10° (light type A) over a wavelength range from 380 nm to 780 nm; - a*RLout and b*RLout determine the values ​​of the reflection color in the L*a*b* color space according to DIN 5033-7:2014-10 and DIN 6174, where the measurement refers to the uncoated surface A of the outer pane 1a, with an incidence angle of 8° and an observation angle of 10° (light type D65) over a wavelength range from 380 nm to 780 nm; - ε the normal emissivity at 283 K according to DIN EN 16012:2015-05, where the measurement refers to the coated surface B of the inner pane 1b and - TTS stands for total solar energy transmission according to ISO 9050:2003-08.

[0070] Fig.Figure 16 shows a schematic cross-section through an embodiment of a composite pane 300 according to the invention with a functional multilayer coating 2. The composite pane 300 comprises an outer pane 1a and an inner pane 1b, which are connected to each other via a thermoplastic intermediate layer 5. The composite pane 300 can, for example, be provided as a window pane or component of a window pane in a building, wherein the outer pane 1a faces the external environment and the inner pane 1b faces the interior. The outer pane 1a has an outer surface I and an inner surface II. The inner pane 1b has an outer surface III and an inner surface IV. The outer surfaces I and III face the external environment, the inner surfaces II and IV face the vehicle interior. The inner surface II of the outer pane 1a and the outer surface III of the inner pane 1b face each other. In the Fig.In the embodiment shown in Figure 16, the outer pane 1a is designed as a coated substrate according to the invention with a multi-layer coating 2 arranged on the inner surface II of the outer pane 1a, and neither the outer surface III nor the inner surface IV of the inner pane 1b is coated. Example 7 Table 8: Structure of an embodiment of a composite disc 300 according to the invention with a functional multilayer coating 2 on the outer disc 1a Shift sequence Layer material Layer thickness Outer pane 1a Glass (PLC) 2.0 mm First dielectric 4a Si3N4 25 nm SiZr(27)Nx 58 nm Three-layer stack 3 TiCx 3a 14 nm TiN 3b 15 nm AIN 3c 5 nm Second dielectric 4b Si3N4 31 nm Thermoplastic intermediate layer 5 PVB (clear) 0.76 mm or 1.52 mm Inner disc 1b Glass (PLC) 2.0 mm

[0071] In this embodiment of the invention, two clear glass panes 1a, 1b are laminated with a clear PVB film as a thermoplastic intermediate layer 5 to form the laminated pane 300. A functional multilayer coating 2 comprising a three-layer combination 3 arranged in a stack of TiCx / TiN / AlN between a first dielectric 4a and a second dielectric 4b is applied to the inner surface II of the outer pane 1a. Example 8 Table 9: Structure of an embodiment of a composite disc 300 according to the invention with a functional multilayer coating 2 on the outer disc 1a Shift sequence Layer material Layer thickness Outer pane 1a Glass (PLC) 2.0 mm First dielectric 4a SiZr(27)Nx 9 nm Three-layer stack 3 TiCx 3a 5 nm TiN 3b 15 nm AIN 3c 4 nm Second dielectric 4b SiZr(27)Nx 33 nm SiO2 32 nm Thermoplastic intermediate layer 5 PVB (clear) 0.76 mm or 1.52 mm Inner disc 1b Glass (PLC) 2.0 mm

[0072] In this embodiment of the invention, two clear glass panes 1a, 1b are laminated with a clear PVB film as a thermoplastic intermediate layer 5 to form the laminated pane 300. A functional multilayer coating 2 comprising a three-layer combination 3 arranged in a stack of TiCx / TiN / AlN between a first dielectric 4a and a second dielectric 4b is applied to the inner surface II of the outer pane 1a.

[0073] Tables 10 and 11 list the optical and thermal properties and behavior of the layer stacks laminated to form composite discs with a structure as shown in Examples 7 and 8. Table 11 shows the values ​​after heat treatment (tempering) for 8 minutes at 640 °C, while Table 10 lists the values ​​for corresponding untempered composite discs. The thickness of the thermoplastic interlayer is 0.76 mm in the untempered embodiment and 1.52 mm in the tempered embodiment. Table 10 Optical and thermal properties and behavior of the layer stacks laminated to form composite discs from Examples 7 and 8, which were not subjected to any heat treatment (untempered embodiment). Example 7 Example 8 TL1 [%] 31,2 40,8 RLout1 [%] 15,7 24,5 L*RLout1 47,1 56,7 a*RLout1 -2,9 -1,3 b*RLout1 -13,3 -2,9 g1 [%] 38,3 41,1

[0074] It means: - TL1 the integrated light transmittance according to DIN 5033-7:2014-10 (light type A) measured with an incident angle of 0° and an observation angle of 2° over a wavelength range of 380 nm to 780 nm; - RLout1 the integrated reflectance according to DIN 5033-7:2014-10, where the measurement refers to the uncoated surface A of the outer pane 1a, with an incident angle of 8° and an observation angle of 10° (light type A) over a wavelength range from 380 nm to 780 nm; - L*RLout1 determines the luminance according to DIN 5033-7:2014-10 and DIN 6174, where the measurement refers to the uncoated surface A of the outer pane 1a; - a*RLout1 and b*RLout1 determine the values ​​of the reflection color in the L*a*b* color space according to DIN 5033-7:2014-10 and DIN 6174, where the measurement refers to the uncoated surface A of the outer pane 1a, with an angle of incidence of 8° and an observation angle of 10° (light type D65) over a wavelength range from 380 nm to 780 nm; - g1 is the Solar Control value measured according to ISO 9050 AM 1.5, which corresponds to the percentage of solar energy that passes through the glass into a room. Table 11 Optical and thermal properties and behavior of the layer stacks laminated to form composite discs from Examples 7 and 8, which were subjected to heat treatment (tempered embodiment). Example 7 Example 8 TL2 [%] 36,9 43,3 RLout2 [%] 24,7 23,4 L*RLout2 45,6 55,6 a*RLout2 -1,3 -0,1 b*RLout2 -9,8 -2,7 g2 [%] 39,7 40,6

[0075] It means: - TL2 the integrated light transmittance according to DIN 5033-7:2014-10 (light type A) measured with an incident angle of 0° and an observation angle of 2° over a wavelength range from 380 nm to 780 nm; - RLout2 the integrated reflectance according to DIN 5033-7:2014-10, where the measurement refers to the uncoated surface A of the outer pane 1a, with an incident angle of 8° and an observation angle of 10° (light type A) over a wavelength range from 380 nm to 780 nm; - L*RLout2 determines the luminance according to DIN 5033-7:2014-10 and DIN 6174, where the measurement refers to the uncoated surface A of the outer pane 1a; - a*RLout2 and b*RLout2 determine the values ​​of the reflection color in the L*a*b* color space according to DIN 5033-7:2014-10 and DIN 6174, where the measurement refers to the uncoated surface A of the outer pane 1a, with an angle of incidence of 8° and an observation angle of 10° (light type D65) over a wavelength range from 380 nm to 780 nm; - g2 is the Solar Control value measured according to ISO 9050 AM 1.5, which corresponds to the percentage of solar energy that passes through the glass into a room.

[0076] To determine whether a color difference is perceived by an observer, Delta E (ΔE) can be used. ΔE is a measure of the distance between two colors and clarifies whether the difference between two colors can be perceived by an observer. It is therefore a relative measure related to the characteristics of human color perception. A ΔE always refers to two colors that are to be compared. ΔE is calculated by determining the Euclidean distance between the a*, b*, and L* values ​​of the two colors being compared. The symbols a* and b* are values ​​of the L*a*b* color space, a color model that describes all perceptible colors. L* indicates the brightness value (luminance) and can have values ​​between 0 and 100. a* indicates the hue and color intensity between green and red, while b* indicates the hue and color intensity between blue and yellow.The more negative or positive the values ​​of b* and a* are, the more intense the hue. Values ​​close to 0 for a* and b* result in a more achromatic, i.e., neutral, hue.

[0077] The formula for calculating ΔE between the color of the untempered embodiment and the color of the tempered embodiment in Examples 7 and 8 is as follows: ΔE=(L*RLout1−L*RLout2)2+(a*RLout1−a*RLout2)2+(b*RLout1−b*RLout2)2

[0078] This results in a ΔE of 4.1 for example 7 and a ΔE of 1.7 for example 8.

[0079] For an observer, no color difference between two colors is perceptible if ΔE is less than 2. A ΔE greater than 5 is clearly visible to an observer. Colors with a ΔE greater than 5 are therefore perceived by the observer as distinct colors.

[0080] Consequently, in the composite pane from Example 8, no color difference is perceptible to the observer between the untempered and the tempered embodiments. In contrast, in the composite pane from Example 7, a slight color difference is perceptible to the observer between the untempered and the tempered embodiments. In composite panes with a coating on the inner surface of the outer pane consisting of a TiN layer sandwiched between two dielectric layers (in particular Si3N4 layers), the color difference ΔE between the color of the untempered embodiment and the color of the tempered embodiment is significantly larger and is, for example, 10, so that the observer perceives two different colors. Reference symbol list 1 substrate 1a Outer pane 1b Inner disc 100, 200, 300 composite disc 2, 2-1 functional multi-layer coating 3, 3-1 Three-layer combination (three-layer stack) 3a,3a-1 TiCx layer 3b,3b-1 TiN layer 3c, 3c-1 AIN layer 4a, 4a-1 first dielectric 4b, 4b-1 second dielectric 5 thermoplastic intermediate layer 6 conventional low-E coating 7 TCO (Transparent Conductive Oxide) layer 8a dielectric layer 8b dielectric layer 8c dielectric layer 8d dielectric layer I outer surface of the outer pane II Interior surface of the outer pane III outer surface of the inner pane IV Interior surface of the inner pane An uncoated surface of the outer pane B coated surface of the inner pane QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] FR 3 127 490 A1

[0006] US 5 112 675 A

[0007] WO 2013 / 127563 A1

[0040] WO 2019 / 110172 A1

[0040] Cited non-patent literature

[0000] DIN 5033-7:2014-10 [0052, 0069, 0074, 0075] DIN 6174 [0052, 0069, 0074, 0075] DIN EN 16012:2015-05 [0052, 0069] ISO 9050:2003-08

[0069] ISO 9050 [0074, 0075]

Claims

[1] Coated substrate comprising a substrate (1) with a functional multilayer coating (2) arranged over a surface on it, in particular a sun and / or heat protection coating, characterized by , that the functional multilayer coating (2) comprises a three-layer combination (3) of the sequence TiCx (3a) / TiN (3b) / AIN (3c), wherein the three-layer combination (3) is arranged between a first dielectric (4a) and a second dielectric (4b) and starting from the substrate (1) the layer sequence A) first dielectric (4a) / TiCx (3a) / TiN (3b) / AIN (3c) / second dielectric (4b) or B) first dielectric (4a) / AIN (3c) / TiN (3b) / TiCx (3a) / second dielectric (4b) is formed. [2] Coated substrate according to claim 1, characterized by, that the titanium nitride (TiN) layer (3b) of the three-layer combination (3) has a layer thickness in the range of 10 nm to 60 nm, preferably from 20 nm to 50 nm, particularly preferably from 25 to 45 nm. [3] Coated substrate according to claim 1 or 2, characterized by , that the aluminium nitride (AIN) layer (3c) of the three-layer combination (3) has a layer thickness in the range of 1 nm to 15 nm, preferably from 2 nm to 10 nm, particularly preferably from 3 nm to 9 nm. [4] Coated substrate according to any one of claims 1 to 3, characterized by , that the titanium carbide (TiCx) layer (3a) of the three-layer combination (3) has a layer thickness in the range of 1 nm to 30 nm, preferably from 1 nm to 20 nm, particularly preferably from 1 nm to 15 nm, most preferably from 4 nm to 15 nm. [5] Coated substrate according to any one of claims 1 to 4, characterized by, that the first dielectric (4a) and / or the second dielectric (4b) is designed as a single dielectric layer or as a multilayer. [6] Coated substrate according to any one of claims 1 to 5, characterized by that the first dielectric (4a) and / or the second dielectric (4b) contains or is formed from silicon nitride (Si3N4), silicon oxynitride (SiOxNy) or silicon zirconium nitride. [7] Coated substrate according to any one of claims 1 to 6, characterized by that the first dielectric (4a) and / or the second dielectric (4b) has a refractive index greater than 1.6, preferably greater than 1.

9. [8] Coated substrate according to any one of claims 1 to 7, characterized by that the substrate (1) is made of glass, glass ceramic or a transparent plastic. [9] Coated substrate according to any one of claims 1 to 8, characterized by, that the functional multilayer coating (2) is electrically conductive and can be heated by applying a voltage. [10] Composite pane (100, 200, 300), in particular for a vehicle or a building, comprising an outer pane (1a) with an outer surface (I) and an inner surface (II) and an inner pane (1b) with an outer surface (III) and an inner surface (IV) which are joined together by a thermoplastic intermediate layer (5), characterized by that the outer pane (1a) and / or the inner pane (1b) is designed as a coated substrate according to one of claims 1 to 9. [11] Composite disc (100, 200, 300) according to claim 10, characterized by , that the functional multilayer coating (2) is formed on the interior surface (II) of the outer pane (1a) and / or on the interior surface (IV) of the inner pane (1b).

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