Coated article having a protective coating containing silicon nitride and/or silicon oxynitride
A coated article includes a substrate, a functional layer over at least a portion of the substrate, and a protective coating over at least a portion of the functional layer, wherein an uppermost layer of the functional layer is a metal oxide layer, and wherein the protective coating comprises a metal nitride layer and a metal oxynitride layer that is disposed between and in contact with at least part of the metal nitride layer and the metal oxide layer of the functional layer.
1. A coated article comprising:
a substrate;
a first functional layer over at least a portion of the substrate, the first functional layer comprising a silver layer over at least a portion of the substrate and an uppermost layer comprising a metal oxide over at least a portion of the silver layer;
a metal oxynitride layer comprising silicon directly over at least a portion of the uppermost layer comprising a metal oxide;
a metal nitride layer comprising silicon over at least a portion of the metal oxynitride layer; and
a protective layer comprising TiAlO over at least a portion of the metal nitride layer.
2. The coated article of claim 1 , wherein the metal oxynitride layer comprising silicon is a gradient layer in which the portion of the metal oxynitride layer closest to the uppermost layer of the first functional layer comprises a greater amount of oxygen than the portion of the metal oxynitride layer closest to the metal nitride layer.
3. The coated article of claim 1 , wherein the uppermost layer of the first functional layer comprises zinc stannate.
4. The coated article of claim 1 , wherein the first functional layer comprises a dielectric layer over at least a portion of the substrate and the silver layer over at least a portion of the dielectric layer.
5. The coated article of claim 4 , wherein the first functional layer further comprises a primer layer over at least a portion of the silver layer and under at least a portion of the uppermost layer.
6. The coated article of claim 5 , wherein the primer layer comprises titanium, or titanium and aluminum.
7. The coated article of claim 6 , wherein at least a portion of the titanium, or titanium and aluminum are oxidized after the titanium or titanium and aluminum are deposited over the silver layer.
8. The coated article of claim 5 , wherein the dielectric layer comprises one or more layers comprising zinc oxide and/or zinc stannate and/or the uppermost layer comprises zinc oxide and/or zinc stannate.
9. The coated article of claim 1 , wherein the uppermost layer of the functional layer does not comprise zinc oxide.
10. The coated article of claim 1 , further comprising a second functional layer beneath at least a portion of the first functional layer and over at least a portion of the substrate.
11. The coated article of claim 1 , wherein the metal nitride layer is directly over the metal oxynitride layer.
12. The coated article of claim 1 , mounted in a body of a vehicle or an insulating glass unit.
13. A coated article, comprising:
a glass substrate;
a first layer of zinc stannate directly over at least a portion of the glass substrate;
a layer of zinc oxide directly over at least a portion of the layer of zinc stannate;
a layer of silver directly over at least a portion of the layer of zinc oxide;
a primer layer comprising Ti, TiAl, and/or oxides of either of the preceding directly over at least a portion of the layer of silver;
a second layer of zinc stannate directly over at least a portion of the primer layer;
a metal oxynitride layer comprising silicon directly over at least a portion of the second layer of zinc stannate;
a metal nitride layer comprising silicon directly over at least a portion of the metal oxynitride layer; and
a protective layer comprising TiAlO directly over at least a portion of the metal nitride layer.
14. A coated article, comprising:
a glass substrate;
a first layer of zinc stannate over at least a portion of the glass substrate and having a thickness ranging from 250 Å to 400 Å;
a layer of zinc oxide over at least a portion of the layer of zinc stannate and having a thickness ranging from 70 Å to 90 Å;
a layer of silver over at least a portion of the layer of zinc oxide and having a thickness ranging from 70 Å to 90 Å;
a primer layer comprising Ti over at least a portion of the layer of silver and having a thickness ranging from 10 Å to 30 Å;
a second layer of zinc stannate over at least a portion of the primer layer and having a thickness ranging from 30 Å to 100 Å;
a metal oxynitride layer comprising SiON directly over at least a portion of the second layer of zinc stannate and having a thickness ranging from 70 Å to 400 Å;
a metal nitride layer comprising SiN directly over at least a portion of the metal oxynitride layer and having a thickness ranging from 100 Å to 400 Å; and
a protective layer comprising TiAlO over the metal nitride layer and having a thickness ranging from 100 Å to 400 Å.