Low-E matchable coated articles having doped seed layer under silver, and corresponding methods
First Claim
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1. A coated article including a coating on a glass substrate, wherein the coating comprises:
- a first crystalline or substantially crystalline layer comprising zinc oxide doped with from about 1-30% Sn (wt. %), provided on the glass substrate;
a first infrared (IR) reflecting layer comprising silver located on the glass substrate and directly over and contacting the first crystalline or substantially crystalline layer comprising zinc oxide doped with from about 1-30% Sn;
a layer comprising an oxide of zirconium located under and directly contacting the first crystalline or substantially crystalline layer comprising zinc oxide doped with from about 1-30% Sn, so that no silicon nitride based layer is located directly under and contacting the first crystalline or substantially crystalline layer comprising zinc oxide doped with from about 1-30% Sn; and
wherein the coated article is configured to have, measured monolithically, at least one of;
(i) a transmissive Δ
E* value of no greater than 3.0 due to a reference heat treatment for 8 minutes at a temperature of about 650 degrees C., (ii) a glass side reflective Δ
E* value of no greater than 3.0 due to the reference heat treatment for 8 minutes at a temperature of about 650 degrees C., and (iii) a film side reflective Δ
E* value of no greater than 3.5 due to the reference heat treatment for 8 minutes at a temperature of about 650 degrees C.
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Abstract
A low-E coating has good color stability (a low ΔE* value) upon heat treatment (HT). The provision of an as-deposited crystalline or substantially crystalline layer of or including zinc oxide, doped with at least one dopant (e.g., Sn), immediately under an infrared (IR) reflecting layer of or including silver in a low-E coating has effect of significantly improving the coating'"'"'s thermal stability (i.e., lowering the ΔE* value). One or more such crystalline, or substantially crystalline, layers may be provided under one or more corresponding IR reflecting layers comprising silver.
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Citations
29 Claims
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1. A coated article including a coating on a glass substrate, wherein the coating comprises:
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a first crystalline or substantially crystalline layer comprising zinc oxide doped with from about 1-30% Sn (wt. %), provided on the glass substrate; a first infrared (IR) reflecting layer comprising silver located on the glass substrate and directly over and contacting the first crystalline or substantially crystalline layer comprising zinc oxide doped with from about 1-30% Sn; a layer comprising an oxide of zirconium located under and directly contacting the first crystalline or substantially crystalline layer comprising zinc oxide doped with from about 1-30% Sn, so that no silicon nitride based layer is located directly under and contacting the first crystalline or substantially crystalline layer comprising zinc oxide doped with from about 1-30% Sn; and wherein the coated article is configured to have, measured monolithically, at least one of;
(i) a transmissive Δ
E* value of no greater than 3.0 due to a reference heat treatment for 8 minutes at a temperature of about 650 degrees C., (ii) a glass side reflective Δ
E* value of no greater than 3.0 due to the reference heat treatment for 8 minutes at a temperature of about 650 degrees C., and (iii) a film side reflective Δ
E* value of no greater than 3.5 due to the reference heat treatment for 8 minutes at a temperature of about 650 degrees C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A coated article including a coating on a glass substrate, wherein the coating comprises:
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a crystalline or substantially crystalline layer comprising zinc oxide doped with at least from 1-30% Sn (wt. %) provided on the glass substrate; a first infrared (IR) reflecting layer comprising silver located on the glass substrate and directly over and contacting the layer comprising zinc oxide doped with at least from 1-30% Sn (wt. %); at least one dielectric layer on the glass substrate over at least the first IR reflecting layer comprising silver and the layer comprising zinc oxide doped with at least from 1-30% Sn (wt. %); wherein no silicon nitride based layer is located between the glass substrate and the layer comprising zinc oxide doped with at least from 1-30% Sn (wt. %); a second IR reflecting layer comprising silver located on the glass substrate over at least the first IR reflecting layer and the at least one dielectric layer; a dielectric layer comprising an oxide of zirconium located on the glass substrate between at least the glass substrate and the layer comprising zinc oxide doped with at least from 1-30% Sn (wt. %), wherein the dielectric layer comprising an oxide of zirconium directly contacts the layer comprising zinc oxide doped with at least from 1-30% Sn; and wherein the coated article is configured to have, measured monolithically, at least one of;
(i) a transmissive Δ
E* value of no greater than 3.0 due to a reference heat treatment for 8 minutes at a temperature of about 650 degrees C., (ii) a glass side reflective Δ
E* value of no greater than 3.0 due to the reference heat treatment for 8 minutes at a temperature of about 650 degrees C., and (iii) a film side reflective Δ
E* value of no greater than 3.5 due to the reference heat treatment for 8 minutes at a temperature of about 650 degrees C.
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Specification