Temperable three layer antirefrlective coating, coated article including temperable three layer antirefrlective coating, and/or method of making the same
First Claim
1. A coated article comprising an antireflective coating supported by a first major surface of a substrate, wherein the antireflective coating comprises, in order moving away from the substrate:
- a silicon-inclusive medium index layer disposed, directly or indirectly, on the first major surface of the substrate, wherein the medium index layer is substantially free of aluminum oxynitride;
a high index layer disposed over and contacting the medium index layer, the high index layer having a thickness of at least 85 nm;
a low index layer disposed over and contacting the high index layer;
wherein the coated article is heat treatable so as to have a Δ
E* value of less than 3;
wherein the medium index layer comprises silicon oxynitride and has a index of refraction of from about 1.65 to 2.0 at 380 nm, 550 nm, and 780 nm wavelengths, the high index layer has an index of refraction of at least about 2.0 at 380 nm, 550 nm, and 780 nm wavelengths, the high index layer having a thickness between about 85 nm and 115 nm, and the low index layer has an index of refraction of from about 1.4 to 1.6 at 380 nm, 550 nm, and 780 nm wavelengths.
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Accused Products
Abstract
A coated article includes a temperable antireflection (AR) coating that utilizes medium and low index (index of refraction “n”) layers having compressive residual stress in the AR coating. In certain example embodiments, the coating may include the following layers from the glass substrate outwardly: silicon oxynitride (SiOxNy) medium index layer/high index layer/low index layer. In certain example embodiments, depending on the chemical and optical properties of the high index layer and the substrate, the medium and low index layers of the AR coating are selected to cause a net compressive residual stress.
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Citations
6 Claims
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1. A coated article comprising an antireflective coating supported by a first major surface of a substrate, wherein the antireflective coating comprises, in order moving away from the substrate:
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a silicon-inclusive medium index layer disposed, directly or indirectly, on the first major surface of the substrate, wherein the medium index layer is substantially free of aluminum oxynitride; a high index layer disposed over and contacting the medium index layer, the high index layer having a thickness of at least 85 nm; a low index layer disposed over and contacting the high index layer; wherein the coated article is heat treatable so as to have a Δ
E* value of less than 3;wherein the medium index layer comprises silicon oxynitride and has a index of refraction of from about 1.65 to 2.0 at 380 nm, 550 nm, and 780 nm wavelengths, the high index layer has an index of refraction of at least about 2.0 at 380 nm, 550 nm, and 780 nm wavelengths, the high index layer having a thickness between about 85 nm and 115 nm, and the low index layer has an index of refraction of from about 1.4 to 1.6 at 380 nm, 550 nm, and 780 nm wavelengths. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification