Low-emissivity glass coatings having a layer of nitrided nichrome and methods of making same
DCFirst Claim
1. A surface-coated glass article comprised of a glass substrate and a multiple layer coating on a surface of the glass substrate, wherein said coating includes a layer of a transparent dielectric material adjacent the surface of the glass substrate, respective layers comprising nichrome and silver each sputter-coated onto the glass substrate in a nitrogen-containing atmosphere, and a layer comprising silicon oxynitride interposed between said layer of dielectric material and said layer comprising nichrome.
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Abstract
Low-E glass coated glass articles are comprised of a glass substrate and a multiple layer coating on a surface of the glass substrate. Relatively high light transmissivity of greater than about 72% and satisfactory color characteristics are achieved. The coating includes a layer of a transparent dielectric material adjacent the surface of the glass substrate, and respective layers of nitrided nichrome and silver each of which are formed by sputter-coating onto the glass substrate in a nitrogen-containing atmosphere. Most preferably, the coating also includes a layer of silicon oxynitride interposed between the layer of dielectric material and the layer of nitrided nichrome. The silicon oxynitride layer may include an oxygen gradient layer wherein the concentration of oxygen decreases from one location in the silicon oxynitride layer to another location at a different depth in that same layer. If present, the oxygen gradient is most preferably such that the greater amount of oxygen concentration is nearer the bottom of the layer (i.e., towards the glass substrate) with the lesser amount of oxygen concentration being nearer the top of the layer (i.e., away from the glass layer).
61 Citations
15 Claims
- 1. A surface-coated glass article comprised of a glass substrate and a multiple layer coating on a surface of the glass substrate, wherein said coating includes a layer of a transparent dielectric material adjacent the surface of the glass substrate, respective layers comprising nichrome and silver each sputter-coated onto the glass substrate in a nitrogen-containing atmosphere, and a layer comprising silicon oxynitride interposed between said layer of dielectric material and said layer comprising nichrome.
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8. A surface-coated glass article comprised of a glass substrate and a multiple layer coating comprising the following layers formed on a surface of the glass substrate, from the surface outwardly:
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(1) a layer of transparent dielectric material;
(2) a layer of silicon oxynitride;
(3) a first layer of nitrided nichrome;
(4) a layer of silver which is sputter-coated onto the glass substrate in a nitrogen-containing atmosphere;
(5) a second layer of nitrided nichrome; and
(6) an outer layer of Si3N4. - View Dependent Claims (9, 12)
(1) between about 100-200;
(2) between about 25-200;
(3) between about 2-40;
(4) between about 100-200;
(5) between about 2-40; and
(6) between about 350-600.
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13. A coated article including a coating supported by a glass substrate, the coating comprising, in the following order going away from the glass substrate:
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a dielectric layer;
a layer comprising silicon oxynitride;
a first layer comprising NiCrNx;
a layer comprising Ag;
a second layer comprising NiCrNx; and
a layer comprising silicon nitride.
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14. A coated article including a coating supported by a glass substrate, the coating comprising, in the following order going away from the glass substrate:
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a dielectric layer;
a layer comprising silicon oxynitride;
a first contact layer for contacting Ag;
a layer comprising Ag;
a second contact layer for contacting Ag; and
another dielectric layer. - View Dependent Claims (15)
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Specification