Heat treatable coated article having zirconium nitride and ITO based IR reflecting layers

Patent metadata

Field	Value
Publication number	US-10526692-B2
Application number	US-201916515218-A
Country	US
Kind code	B2
Filing date	Jul 18, 2019
Priority date	Feb 23, 2017
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

Coated articles include two or more functional infrared (IR) reflecting layers optionally sandwiched between at least dielectric layers. The dielectric layers may be of or including silicon nitride or the like. At least one of the IR reflecting layers is of or including zirconium nitride (e.g., ZrN) and at least another of the IR reflecting layers is of or including indium-tin-oxide (ITO).

First claim

What is claimed is:

1. A coated article including a coating supported by a glass substrate, the coating comprising:
a first dielectric layer comprising silicon nitride on the glass substrate;
a first infrared (IR) reflecting layer comprising ITO on the glass substrate, wherein the first dielectric layer comprising silicon nitride is located between at least the glass substrate and the first IR reflecting layer comprising ITO;
a second dielectric layer comprising silicon nitride on the glass substrate over at least the first IR reflecting layer comprising ITO;
a second layer IR reflecting layer comprising a nitride of zirconium on the glass substrate over at least the first and second dielectric layers comprising silicon nitride, so that the second dielectric layer comprising silicon nitride is located between at least the first IR reflecting layer comprising ITO and the second IR reflecting layer comprising the nitride of zirconium;
a third dielectric layer comprising silicon nitride on the glass substrate over at least the second IR reflecting layer comprising the nitride of zirconium;
wherein the coating contains no IR reflecting layer based on silver, and contains only two IR reflecting layers;
wherein the first IR reflecting layer comprising ITO is from 300-800 Å thick, and the second IR reflecting layer comprising the nitride of zirconium is from 130-300 Å thick; and
wherein the coated article has: a visible transmission from about 15-80%, a film side visible reflectance no greater than 15%, an SHGC value of no greater than 0.45, and a glass side reflective a* value of from −14.0 to +1.6.

2. The coated article of claim 1 , wherein the first dielectric layer comprising silicon nitride is located between and directly contacting the first and second IR reflecting layers.

3. The coated article of claim 1 , wherein the second IR reflecting layer comprising the nitride of zirconium comprises ZrN x , where x is from 0.8 to 1.2.

4. The coated article of claim 1 , wherein the second IR reflecting layer contains from 0-8% oxygen (atomic %).

5. The coated article of claim 1 , wherein the coating further comprises another dielectric layer comprising silicon nitride located between and contacting the glass substrate and the first IR reflecting layer.

6. The coated article of claim 1 , wherein the first dielectric layer comprising silicon nitride further comprises oxygen.

7. The coated article of claim 1 , where the second IR reflecting layer consists essentially of the nitride of zirconium.

8. The coated article of claim 1 , wherein the coating further comprises an overcoat comprising an oxide of zirconium.

9. The coated article of claim 1 , wherein the coated article has a film side visible reflectance no greater than 12%.

10. The coated article of claim 1 , wherein the coated article has a film side visible reflectance no greater than 10%.

11. The coated article of claim 1 , wherein the glass substrate is a clear glass substrate.

12. The coated article of claim 1 , wherein the first IR reflecting layer comprising ITO is physically thicker than the second IR reflecting layer comprising the nitride of zirconium by at least 100 Å.

13. The coated article of claim 1 , wherein the first IR reflecting layer comprising ITO is physically thicker than the second IR reflecting layer comprising the nitride of zirconium by at least 300 Å.

14. A coated article including a coating supported by a glass substrate, the coating comprising:
a first dielectric layer comprising silicon nitride on the glass substrate;
a first infrared (IR) reflecting layer comprising ITO on the glass substrate, wherein the first dielectric layer comprising silicon nitride is located between at least the glass substrate and the first IR reflecting layer comprising ITO;
a second dielectric layer comprising silicon nitride on the glass substrate over at least the first IR reflecting layer comprising ITO;
a second layer IR reflecting layer comprising a nitride of zirconium on the glass substrate over at least the first and second dielectric layers comprising silicon nitride, so that the second dielectric layer comprising silicon nitride is located between and directly contacting the first IR reflecting layer comprising ITO and the second IR reflecting layer comprising the nitride of zirconium;
a third dielectric layer comprising silicon nitride on the glass substrate over at least the second IR reflecting layer comprising the nitride of zirconium;
wherein the coating contains no IR reflecting layer based on silver, and contains only two IR reflecting layers;
wherein the first IR reflecting layer comprising ITO is from 300-800 Å thick, and the second IR reflecting layer comprising the nitride of zirconium is from 130-300 Å thick; and
wherein the coated article has a visible transmission from about 15-80% and a light-to-solar gain ratio (LSG) of at least 1.17.

15. The coated article of claim 14 , wherein the first IR reflecting layer comprising ITO is physically thicker than the second IR reflecting layer comprising the nitride of zirconium by at least 100 Å.

16. The coated article of claim 14 , wherein the first IR reflecting layer comprising ITO is physically thicker than the second IR reflecting layer comprising the nitride of zirconium by at least 300 Å.

Assignees

• Guardian Glass Llc

Inventors

• Lu Yiwei
• Ding Guowen
• Clavero Cesar
• Schweigert Daniel
• Zhang Guizhen
• Jewhurst Scott
• Lee Daniel

Classifications

• C03C17/3435 Primary

  comprising a nitride, oxynitride, boronitride or carbonitride · CPC title

• C23C14/0641

  Nitrides (C23C14/0617 takes precedence) · CPC title

• E06B9/24

  Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; {Slat blinds}(operating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00) · CPC title

• C23C14/086 Primary

  of zinc, germanium, cadmium, indium, tin, thallium or bismuth · CPC title

• C03C2217/948

  Layers comprising indium tin oxide [ITO] · CPC title