Coated article with IR reflecting layer(s) and method of making same

Patent metadata

Field	Value
Publication number	US-9738561-B2
Application number	US-201615148015-A
Country	US
Kind code	B2
Filing date	May 6, 2016
Priority date	Nov 5, 2004
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A coated article is provided with at least one infrared (IR) reflecting layer. The IR reflecting layer may be of silver or the like. In certain example embodiments, a titanium oxide layer is provided over the IR reflecting layer, and it has been found that this surprisingly results in an IR reflecting layer with a lower specific resistivity (SR) thereby permitting thermal properties of the coated article to be improved.

First claim

The invention claimed is:

1. A method of making a coated article, the method comprising:
providing a glass substrate;
forming a dielectric layer on the substrate;
forming an IR reflecting layer comprising silver on the substrate over at least the dielectric layer;
depositing a layer comprising titanium oxide over and directly contacting the IR reflecting layer comprising silver in a manner so that the layer comprising titanium oxide as deposited is more oxided at a location therein further from the IR reflecting layer than at a location closer to the IR reflecting layer.

2. The method of claim 1 , wherein said depositing comprises sputtering.

3. The method of claim 1 , wherein said forming the IR reflecting layer comprises sputtering the IR reflecting layer.

4. The method of claim 1 , further comprising depositing a layer comprising zinc oxide located between the dielectric layer and the IR reflecting layer, the layer comprising zinc oxide directly contacting the IR reflecting layer.

5. The method of claim 4 , wherein the dielectric layer comprises an oxide of titanium.

6. The method of claim 4 , wherein the dielectric layer comprises tin oxide.

7. The method of claim 1 , wherein the IR reflecting layer comprising silver has a specific resistivity (SR) of no greater than 5.0 micro-ohms·cm.

8. The method of claim 1 , wherein the IR reflecting layer comprising silver has a specific resistivity (SR) of no greater than 4.8 micro-ohms·cm.

9. The method of claim 1 , wherein the IR reflecting layer comprising silver has a specific resistivity (SR) of no greater than 4.6 micro-ohms·cm.

10. The method of claim 1 , wherein the coated article has a visible transmission of at least 70%.

11. The method of claim 1 , wherein the coated article has a glass side visible reflectance (R g Y) of from 1-10%, measured monolithically.

12. The method of claim 1 , wherein the coated article has a film side visible reflectance (R f Y) of from 1-7%, measured monolithically.

13. The method of claim 1 , wherein the coated article has a glass side reflective a* value from −5.0 to +4.0, and a glass side reflective b* value from −14.0 to +10.0.

14. The method of claim 1 , wherein the coated article has a glass side reflective a* value from −1.5 to +3.0, and a glass side reflective b* value from −10.0 to 0.

15. The method of claim 1 , further comprising depositing a layer comprising silicon nitride located over and contacting a layer comprising tin oxide, wherein said layer comprising silicon nitride is an overcoat and thus an uppermost layer of the coating.

16. The method of claim 1 , wherein the coating includes only one IR reflecting layer comprising silver.

Assignees

• Guardian Industries
• Centre Luxembourgeois De Rech Pour Le Verre Et La Ceram S A (C R V C )

Inventors

• Butz Jochen
• Kriltz Uwe
• Siwek Artur
• Dietrich Anton
• Müller Jens-Peter
• Lemmer Jean-Marc
• Blacker Richard

Classifications

• C03C17/3652

  the coating stack containing at least one sacrificial layer to protect the metal from oxidation · CPC title

• C03C17/3694

  one layer having a composition gradient through its thickness · CPC title

• C03C17/366

  Low-emissivity or solar control coatings · CPC title

• C03C17/3681

  the multilayer coating being used in glazing, e.g. windows or windscreens · CPC title

• B32B2255/205

  Metallic coating · CPC title