Coated article with dual-layer protective overcoat of nitride and zirconium or chromium oxide
First Claim
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1. A coated article including a layer system supported by a glass substrate, the layer system comprising:
- a first dielectric layer supported by the glass substrate;
an infrared (IR) reflecting layer supported by the glass substrate and provided over at least the first dielectric layer; and
a multi-layer overcoat provided over at least the IR reflecting layer, wherein the overcoat includes a first layer comprising silicon nitride having an index of refraction “
n”
of from 1.7 to 2.5 and a second layer comprising zirconium oxide located over the first layer comprising silicon nitride.
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Abstract
A coated article is provided so as to include an overcoat including zirconium oxide or chromium oxide. In certain example embodiments, the overcoat includes a dual layer overcoat including a nitride inclusive layer which supports a zirconium oxide (ZrOX) layer. In certain example embodiments, the overcoat may be of chromium oxide, with or without such a nitride inclusive layer.
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Citations
26 Claims
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1. A coated article including a layer system supported by a glass substrate, the layer system comprising:
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a first dielectric layer supported by the glass substrate;
an infrared (IR) reflecting layer supported by the glass substrate and provided over at least the first dielectric layer; and
a multi-layer overcoat provided over at least the IR reflecting layer, wherein the overcoat includes a first layer comprising silicon nitride having an index of refraction “
n”
of from 1.7 to 2.5 and a second layer comprising zirconium oxide located over the first layer comprising silicon nitride. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 26)
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16. A coated article including a layer system supported by a glass substrate, comprising:
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a first dielectric layer supported by the glass substrate;
an infrared (IR) reflecting layer supported by the glass substrate and provided over at least the first dielectric layer;
an overcoat provided over at least the IR reflecting layer and the first dielectric layer, wherein the overcoat includes one of;
(a) a first layer comprising silicon nitride which supports and directly contacts a second layer comprising zirconium oxide located over and contacting the first layer comprising silicon nitride; and
(b) a chromium oxide layer; and
wherein the coated article has a visible transmission of from 8 to 80%, and a sheet resistance (RS) of less than 120 ohms/square. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A coated article including a layer system supported by a glass substrate, the layer system comprising:
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a first dielectric layer supported by the glass substrate;
an infrared (IR) reflecting layer supported by the glass substrate and provided over at least the first dielectric layer;
an overcoat comprising a layer consisting essentially of chromium oxide provided over at least the IR reflecting layer, wherein the layer consisting essentially of chromium oxide is the outermost layer of the layer system; and
wherein the coated article has a visible transmission of from 8 to 80%, and a sheet resistance (RS) of less than 250 ohms/square. - View Dependent Claims (25)
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Specification