Low-e coating with high visible transmission
First Claim
Patent Images
1. A coated article including a coating supported by a glass substrate, the coating comprising:
- first and second infrared (IR) reflecting layers comprising silver (Ag);
a first dielectric layer comprising titanium oxide provided between the first IR reflecting layer and the glass substrate;
a second dielectric layer having an index of refraction 1.8<
=n<
=2.2 provided between the first and second IR reflecting layers, wherein the second dielectric layer has an index of refraction n less than the index of refraction n of the first dielectric layer, a third dielectric layer comprising titanium oxide provided over the first and second IR reflecting layers;
a fourth dielectric layer comprising silicon oxide provided over the third dielectric layer comprising titanium oxide; and
wherein the coated article has a visible transmission of at least 70%.
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Abstract
Coated articles are provided with an anti-reflection system(s) which enables high visible transmission and/or low visible reflection. Neutral color is also achievable in certain example embodiments. In certain example embodiments, the anti-reflection system(s) is used in conjunction with a double silver (Ag) layer stack which provides low sheet resistance and/or emissivity.
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Citations
60 Claims
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1. A coated article including a coating supported by a glass substrate, the coating comprising:
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first and second infrared (IR) reflecting layers comprising silver (Ag);
a first dielectric layer comprising titanium oxide provided between the first IR reflecting layer and the glass substrate;
a second dielectric layer having an index of refraction 1.8<
=n<
=2.2 provided between the first and second IR reflecting layers, wherein the second dielectric layer has an index of refraction n less than the index of refraction n of the first dielectric layer,a third dielectric layer comprising titanium oxide provided over the first and second IR reflecting layers;
a fourth dielectric layer comprising silicon oxide provided over the third dielectric layer comprising titanium oxide; and
wherein the coated article has a visible transmission of at least 70%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A coated article including a coating supported by a glass substrate, the coating comprising:
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first and second infrared (IR) reflecting layers each comprising at least one of silver (Ag) and gold (Au);
a first dielectric layer comprising titanium oxide provided between the first IR reflecting layer and the glass substrate;
a second dielectric layer comprising titanium oxide provided between the first and second IR reflecting layers;
a third dielectric layer having an index of refraction 1.8<
=n<
=2.2 provided between the first and second IR reflecting layers, wherein the third dielectric layer has an index of refraction n less than the index of refraction n of at least one of the first and second dielectric layers;
a fourth dielectric layer comprising silicon oxide provided over the first and second IR reflecting layers; and
wherein the coated article has a visible transmission of at least 70%. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A coated article including a coating supported by a glass substrate, the coating comprising:
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first and second infrared (IR) reflecting layers each comprising at least one of silver (Ag) and gold (Au);
a first dielectric layer comprising titanium oxide provided between the first IR reflecting layer and the glass substrate;
a second dielectric layer comprising titanium oxide provided between the first and second IR reflecting layers;
a third dielectric layer having an index of refraction 1.8<
=n<
=2.2 provided between the first and second IR reflecting layers, wherein the third dielectric layer has an index of refraction n less than the index of refraction n of at least one of the first and second dielectric layers;
a fourth dielectric layer comprising at least one of silicon nitride and silicon oxynitride provided over the first and second IR reflecting layers; and
wherein the coated article has a visible transmission of at least 70%. - View Dependent Claims (24, 25)
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26. A coated article including a coating supported by a glass substrate, the coating comprising, from the glass substrate outwardly:
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a first dielectric layer comprising silicon zirconium nitride;
a first contact layer comprising at least one of NiCr, NiCrOx and NiCrNx;
a first IR reflecting layer comprising Ag;
a second contact layer comprising at least one of NiCr, NiCrOx and NiCrNx;
a second dielectric layer comprising silicon zirconium nitride;
a third dielectric layer having an index of refraction n less than an index of refraction n of at least one of the first and second dielectric layers;
a third contact layer comprising at least one of NiCr, NiCrOx and NiCrNx;
a second IR reflecting layer comprising Ag;
a fourth contact layer comprising at least one of NiCr, NiCrOx and NiCrNx;
a fourth dielectric layer comprising silicon oxide; and
wherein the coated article has a visible transmission of at least 70% and a sheet resistance (Rs) of no greater than 10 ohms/square. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A coated article including a coating supported by a glass substrate, the coating comprising, from the glass substrate outwardly:
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a first dielectric layer comprising silicon zirconium nitride;
a contact layer comprising at least one of NiCr, NiCrOx and NiCrNx;
a first IR reflecting layer comprising Ag;
a second dielectric layer comprising silicon zirconium nitride;
a third dielectric layer having an index of refraction n less than an index of refraction of at least one of the first and second dielectric layers;
a contact layer comprising at least one of NiCr, NiCrOx and NiCrNx;
a second IR reflecting layer comprising Ag;
a fourth dielectric layer comprising at least one of tin oxide and silicon nitride; and
wherein the coated article has a visible transmission of at least 70% and a sheet resistance (Rs) of no greater than 10 ohms/square. - View Dependent Claims (33, 34)
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35. A coated article including a coating supported by a glass substrate, the coating comprising, from the glass substrate outwardly:
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a first dielectric layer comprising niobium oxide;
a contact layer comprising at least one of NiCr, NiCrOx and NiCrNx;
a first IR reflecting layer comprising Ag;
a second dielectric layer comprising niobium oxide;
a third dielectric layer having an index of refraction n less than an index of refraction of at least one of the first and second dielectric layers;
a contact layer comprising at least one of NiCr, NiCrOx and NiCrNx;
a second IR reflecting layer comprising Ag;
a fourth dielectric layer comprising silicon oxide; and
wherein the coated article has a visible transmission of at least 70% and a sheet resistance (Rs) of no greater than 10 ohms/square. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42)
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43. A coated article including a coating supported by a glass substrate, the coating comprising, from the glass substrate outwardly:
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a first dielectric layer comprising niobium oxide;
a first IR reflecting layer comprising at least one of Ag and Au;
a second dielectric layer comprising niobium oxide;
a third dielectric layer having an index of refraction n less than an index of refraction of at least one of the first and second dielectric layers;
a second IR reflecting layer comprising Ag;
a fourth dielectric layer comprising at least one of tin oxide and silicon nitride; and
wherein the coated article has a visible transmission of at least 70% and a sheet resistance (Rs) of no greater than 10 ohms/square. - View Dependent Claims (44)
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45. A coated article including a coating supported by a glass substrate, the coating comprising, from the glass substrate outwardly:
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a first dielectric layer comprising niobium oxide;
a first IR reflecting layer comprising at least one of Ag and Au;
a second dielectric layer comprising niobium oxide;
a second IR reflecting layer comprising Ag;
a third dielectric layer comprising niobium oxide;
a fourth dielectric layer comprising at least one of silicon oxide, silicon oxynitride, tin oxide and silicon nitride; and
wherein the coated article has a visible transmission of at least 70% and a sheet resistance (Rs) of no greater than 10 ohms/square. - View Dependent Claims (46, 47, 48, 49, 50, 51)
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52. A coated article including a coating supported by a glass substrate, the coating comprising:
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first and second infrared (IR) reflecting layers each comprising at least one of Ag and Au;
a first dielectric portion having an effective index of refraction n1<
=3.0 provided between the first IR reflecting layer and the glass substrate;
a second dielectric portion having an effective index of refraction n2 less than or equal to n1, the second dielectric portion provided between the first and second IR reflecting layers;
a third dielectric portion provided over the first and second IR reflecting layers, said third dielectric layer having an effective index of refraction n3 less than n1 and n2, so that n3<
n2<
=n1; and
wherein the coated article has a visible transmission of at least 70%. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60)
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Specification