Coated article with tin oxide, silicon nitride and/or zinc oxide under IR reflecting layer and corresponding method
First Claim
1. A coated article comprising a coating supported by a glass substrate, the coating comprising:
- a first dielectric layer on the glass substrate;
a first layer comprising tin oxide which further includes nitrogen, located over the first dielectric layer;
a layer comprising silicon nitride located over and contacting the first layer comprising tin oxide;
a first layer comprising zinc oxide located over and contacting the layer comprising silicon nitride;
an infrared (IR) reflecting layer comprising silver located over and contacting the first layer comprising zinc oxide;
a contact layer located over and contacting the IR reflecting layer;
a second layer comprising zinc oxide located over and contacting the contact layer;
another dielectric layer located over the second layer comprising zinc oxide; and
wherein the coating includes only one IR reflecting layer, said IR reflecting layer comprising silver.
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Accused Products
Abstract
A coated article is provided that may be heat treated in certain example embodiments. A coating of the coated article includes a tin oxide inclusive layer, a silicon nitride inclusive layer and/or a zinc oxide inclusive layer located under an infrared (IR) reflecting layer of a material such as silver. It has been found that this may result in improved thermal stability upon heat treatment, higher visible transmission, desirable coloration, lower sheet resistance (Rs), and/or lower emissivity in certain example embodiments of this invention. In certain embodiments, a zinc oxide inclusive layer may be provided above a contact layer over the IR reflecting layer, again for improving thermal stability, coloration, sheet resistance and/or visible transmission.
95 Citations
33 Claims
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1. A coated article comprising a coating supported by a glass substrate, the coating comprising:
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a first dielectric layer on the glass substrate; a first layer comprising tin oxide which further includes nitrogen, located over the first dielectric layer; a layer comprising silicon nitride located over and contacting the first layer comprising tin oxide; a first layer comprising zinc oxide located over and contacting the layer comprising silicon nitride; an infrared (IR) reflecting layer comprising silver located over and contacting the first layer comprising zinc oxide; a contact layer located over and contacting the IR reflecting layer; a second layer comprising zinc oxide located over and contacting the contact layer; another dielectric layer located over the second layer comprising zinc oxide; and wherein the coating includes only one IR reflecting layer, said IR reflecting layer comprising silver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A coated article comprising a coating supported by a glass substrate, the coating comprising:
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a first dielectric layer on the glass substrate; a layer comprising tin oxide located over at least the first dielectric layer; a layer comprising silicon nitride located over and contacting the layer comprising tin oxide; a layer comprising zinc oxide located over and contacting the layer comprising silicon nitride; an infrared (IR) reflecting layer comprising silver located over and contacting the layer comprising zinc oxide; a contact layer located over and contacting the IR reflecting layer; at least another dielectric layer located over the contact layer; and wherein the coating includes only one IR reflecting layer, said IR reflecting layer comprising silver. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification