Coated article with low-E coating having reflecting system with silver and zinc based barrier layer(s)
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.
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;
another barrier layer comprising Ni and/or Cr located over and directly contacting the second barrier layer comprising zinc;
a second dielectric layer on the glass substrate located over at least each of: the first and second barrier layers, the another barrier layer, and the IR reflecting layer; and
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 layer comprising Ni and/or Cr located under and directly contacting the first barrier layer comprising zinc.
16. The coated article of claim 1 , wherein metal content of the first and second barrier layers is at least 90% zinc.
17. The coated article of claim 1 , wherein the first and second barrier layers comprising zinc are each from 15-40 Å thick.
18. The coated article of claim 1 , wherein the first and second barrier layers comprising zinc are each from 17-33 Å thick.
19. 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;
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; and
wherein the coating further comprises a dielectric layer comprising zinc oxide located under and directly contacting the first barrier layer comprising zinc.
20. A coated article including a coating supported by a glass substrate, the coating comprising:
a first dielectric layer on the glass substrate;
an infrared (IR) reflecting layer comprising silver on the glass substrate located over at least the first dielectric layer;
a barrier layer comprising zinc that is metallic or substantially metallic on the glass substrate over and directly contacting the IR reflecting layer comprising silver;
another barrier layer comprising Ni and/or Cr on the glass substrate located over and directly contacting the barrier layer comprising zinc;
a second dielectric layer on the glass substrate located over at least the IR reflecting layer, the barrier layer comprising zinc, and the barrier layer comprising Ni and/or Cr; and
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 coated article of claim 20 , wherein metal content of the barrier layer comprising zinc is at least 90% zinc.
22. The coated article of claim 20 , wherein the coated article has a visible transmission of at least 40% and/or a light-to-solar gain ratio (LSG) of at least 1.10.
23. The coated article of claim 20 , wherein the barrier layer comprising zinc further comprises aluminum.
24. The coated article of claim 20 , wherein the barrier layer comprising zinc is from 15-40 Å thick.
25. The coated article of claim 20 , wherein the barrier layer comprising zinc is from 17-33 Å thick.
26. The coated article of claim 20 , wherein the barrier layer comprising Ni and/or Cr is nitrided.
27. The coated article of claim 20 , further comprising a layer comprising zinc on the glass substrate over at least the first dielectric layer and located under and directly contacting the IR reflecting layer.
28. 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 another barrier layer comprising Ni and/or Cr located over and directly contacting the second barrier layer comprising zinc;
depositing a second dielectric layer on the glass substrate located over at least each of: the first and second barrier layers, the another barrier layer, and the IR reflecting layer; and 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.
29. The method of claim 28 , wherein each of the layers is deposited via sputtering.
30. The method of claim 28 , wherein at least one of the first and second barrier layers comprising zinc is from 15-40 Å thick.
31. The method of claim 28 , wherein the first and second barrier layers comprising zinc are each from 17-33 Å thick.
32. 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 an infrared (IR) reflecting layer comprising silver on the glass substrate located over at least the first dielectric layer;
depositing a barrier layer comprising zinc that is metallic or substantially metallic on the glass substrate over and directly contacting the IR reflecting layer comprising silver;
depositing another barrier layer comprising Ni and/or Cr located over and directly contacting the barrier layer comprising zinc;
depositing a second dielectric layer on the glass substrate located over at least the IR reflecting layer, the barrier layer comprising zinc, and the another barrier layer; and
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.
33. The method of claim 32 , wherein metal content of the barrier layer comprising zinc is at least 90% zinc.
34. The method of claim 32 , wherein the coated article has a visible transmission of at least 40% and/or a light-to-solar gain ratio (LSG) of at least 1.10.
35. The coated article of claim 32 , wherein the barrier layer comprising zinc further comprises aluminum.
36. The method of claim 32 , wherein said another barrier layer comprises a nitride of NiCr.
37. The method of claim 32 , wherein the barrier layer comprising zinc further comprises silver.