Coated article with low-E coating having IR reflecting system with silver and zinc based barrier layer(s)

Patent metadata

Field	Value
Publication number	US-10745798-B2
Application number	US-201916357630-A
Country	US
Kind code	B2
Filing date	Mar 19, 2019
Priority date	Mar 1, 2017
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

A coated article includes a silver (Ag) based infrared (IR) reflecting layer(s) on a glass substrate that is provided adjacent to and contacting at least one metallic or substantially metallic zinc (Zn) inclusive barrier layer in order to improve chemical durability characteristics of the low-E coating. In certain example embodiments, the silver based layer may be sandwiched between first and second metallic or substantially metallic barrier layers of or including zinc. The IR reflecting layer(s) and zinc based barrier layer(s) are part of a low emissivity (low-E) coating.

First claim

The invention claimed is:

1. A coated article including a coating supported by a glass substrate, the coating comprising:
a first dielectric layer on the glass substrate;
a first barrier layer comprising zinc that is metallic or substantially metallic on the glass substrate over at least the first dielectric layer;
an infrared (IR) reflecting layer comprising silver on the glass substrate located over and directly contacting the first barrier layer comprising zinc;
a second barrier layer comprising zinc that is metallic or substantially metallic on the glass substrate over and directly contacting the IR reflecting layer comprising silver, so that the IR reflecting layer comprising silver is located between and directly contacting the first and second barrier layers comprising zinc;
a second dielectric layer on the glass substrate located over at least the first and second barrier layers and the IR reflecting layer; and
a layer comprising Ni and/or Cr located under and directly contacting the first barrier layer comprising zinc;
wherein the coating has a sheet resistance (R s ) of no greater than 11 ohms/square and a normal emissivity (E n ) of no greater than 0.2.

2. The coated article of claim 1 , wherein the IR reflecting layer consists essentially of silver.

3. The coated article of claim 1 , wherein the IR reflecting layer is metallic or substantially metallic.

4. The coated article of claim 1 , wherein the coated article has a visible transmission of at least 40%.

5. The coated article of claim 1 , wherein the coated article has a visible transmission of at least 50%.

6. The coated article of claim 1 , wherein the coated article has a light-to-solar gain ratio (LSG) of at least 1.10.

7. The coated article of claim 1 , wherein the coated article has a light-to-solar gain ratio (LSG) of at least 1.20.

8. The coated article of claim 1 , wherein the coated article has a light-to-solar gain ratio (LSG) of at least 1.30.

9. The coated article of claim 1 , wherein the first dielectric layer comprises silicon nitride.

10. The coated article of claim 1 , wherein the first barrier layer comprising zinc further comprises aluminum.

11. The coated article of claim 1 , wherein the second barrier layer comprising zinc further comprises aluminum.

12. The coated article of claim 1 , wherein the second dielectric layer comprises silicon nitride.

13. The coated article of claim 1 , wherein the coating has a sheet resistance (R s ) of no greater than 9 ohms/square and a normal emissivity (E n ) of no greater than 0.11.

14. The coated article of claim 1 , wherein the coating further comprises a second infrared (IR) reflecting layer comprising silver that is located between third and fourth metallic or substantially metallic barrier layers comprising zinc.

15. The coated article of claim 1 , wherein the coating further comprises a dielectric layer comprising zinc oxide located under and directly contacting the first barrier layer comprising zinc.

16. The coated article of claim 1 , wherein the coating further comprises another barrier layer comprising Ni and/or Cr located over and directly contacting the second barrier layer comprising zinc.

17. The coated article of claim 1 , wherein metal content of the first and second barrier layers is at least 90% zinc.

18. The coated article of claim 1 , wherein the first and second barrier layers comprising zinc are each from 15-40 Å thick.

19. The coated article of claim 1 , wherein the first and second barrier layers comprising zinc are each from 17-33 Å thick.

20. A method of making a coated article including a coating supported by a glass substrate, the method comprising:
depositing a first dielectric layer on the glass substrate;
depositing a first barrier layer comprising zinc that is metallic or substantially metallic on the glass substrate over at least the first dielectric layer;
depositing an infrared (IR) reflecting layer comprising silver on the glass substrate located over and directly contacting the first barrier layer comprising zinc;
depositing a second barrier layer comprising zinc that is metallic or substantially metallic on the glass substrate over and directly contacting the IR reflecting layer comprising silver, so that the IR reflecting layer comprising silver is located between and directly contacting the first and second barrier layers comprising zinc;
depositing a second dielectric layer on the glass substrate located over at least the first and second barrier layers and the IR reflecting layer; and
depositing a layer comprising Ni and/or Cr located under and directly contacting the first barrier layer comprising zinc;
wherein the coating has a sheet resistance (R s ) of no greater than 11 ohms/square and a normal emissivity (E n ) of no greater than 0.2.

21. The method of claim 20 , wherein each of the layers is deposited via sputtering.

22. The method of claim 20 , wherein at least one of the first and second barrier layers comprising zinc is from 15-40 Å thick.

23. The method of claim 20 , wherein the first and second barrier layers comprising zinc are each from 17-33 Å thick.

Assignees

• Guardian Glass Llc
• Guardian Glass Llc

Inventors

• Boyce Brent
• Lu Yiwei
• Ding Guowen
• Zhang Guizhen
• Lee Daniel
• Schweigert Daniel
• Clavero Cesar
• Jewhurst Scott
• Le Minh

Classifications

• C03C17/366 Primary

  Low-emissivity or solar control coatings · CPC title

• C03C17/3644

  the metal being silver · CPC title

• C03C17/3639

  Multilayers containing at least two functional metal layers · CPC title

• C03C17/36 Primary

  at least one coating being a metal · CPC title

• C23C14/185 Primary

  by cathodic sputtering · CPC title