초록 ▼

A coated article is provided which may be heat treated (e.g., thermally tempered) in certain instances. In certain example embodiments, an interlayer of or including a metal oxide such as tin oxide is provided under an infrared (IR) reflecting layer so as to be located between respective layers comp

A coated article is provided which may be heat treated (e.g., thermally tempered) in certain instances. In certain example embodiments, an interlayer of or including a metal oxide such as tin oxide is provided under an infrared (IR) reflecting layer so as to be located between respective layers comprising silicon nitride and zinc oxide. It has been found that the use of such a tin oxide inclusive interlayer results in significantly improved mechanical durability, thermal stability and/or haze characteristics. In certain example embodiments, a zinc oxide inclusive layer is provide over an IR reflecting layer in order to improve thermal stability. A zirconium oxide overcoat may also be provided in certain example instances.

대표청구항 ▼

The invention claimed is: 1. A coated article comprising a coating supported by a glass substrate, the coating comprising: a first dielectric layer; a first infrared (IR) reflecting layer comprising silver located over at least the dielectric layer; a first layer comprising silicon nitride located

The invention claimed is: 1. A coated article comprising a coating supported by a glass substrate, the coating comprising: a first dielectric layer; a first infrared (IR) reflecting layer comprising silver located over at least the dielectric layer; a first layer comprising silicon nitride located over at least the first IR reflecting layer and the first dielectric layer; a first layer comprising tin oxide located over and contacting the first layer comprising silicon nitride; a first layer comprising zinc oxide located over and contacting the first layer comprising tin oxide, so that the first layer comprising tin oxide is located between and contacting the first layer comprising silicon nitride and the first layer comprising zinc oxide; a second IR reflecting layer comprising silver located over and contacting the first layer comprising zinc oxide; a contact layer located over and contacting the second IR reflecting layer; another layer comprising metal oxide located over and contacting the contact layer; and at least another dielectric layer located over at least the another layer comprising metal oxide. 2. The coated article of claim 1, further comprising a layer comprising zinc oxide that is located under and contacting the first IR reflecting layer, and wherein one or more of the layers comprising zinc oxide further comprises aluminum. 3. The coated article of claim 1, wherein the coated article is heat treated. 4. The coated article of claim 1, further comprising a second layer comprising tin oxide located under and contacting the first layer comprising silicon nitride. 5. The coated article of claim 1, wherein the first dielectric layer comprises at least one of silicon nitride, zinc oxide and titanium oxide. 6. The coated article of claim 1, wherein the first dielectric layer comprises silicon nitride, and said another dielectric layer also comprises silicon nitride. 7. The coated article of claim 1, wherein the coated article comprises a heat treated glass substrate which supports the coating, and when measured monolithically following heat treatment has a visible transmission of at least 75% and a sheet resistance (Rs) of less than or equal to 3.0 ohms/square. 8. The coated article of claim 1, wherein the coated article comprises a heat treated glass substrate which supports the coating, and when measured monolithically following heat treatment has a visible transmission of at least 77% and a sheet resistance (Rs) of less than or equal to 2.5 ohms/square. 9. The coated article of claim 1, wherein: (a) the coated article comprises a heat treated glass substrate which supports the coating, and when measured monolithically following heat treatment has a visible transmission of at least 80% and a sheet resistance (Rs) of less than or equal to 2.1 ohms/square; and/or (b) wherein the coated article is an IG window unit having a visible transmission of at least 60%, and a SHGC value of less than or equal to 0.40. 10. The coated article of claim 1, further comprising a layer comprising zirconium oxide which is an overcoat layer that is an outermost layer of the coating. 11. The coated article of claim 1, wherein the another layer comprising metal oxide is of tin oxide and/or zinc oxide. 12. A coated article comprising a coating supported by a glass substrate, the coating comprising: a dielectric layer; a first infrared (IR) reflecting layer located on the glass substrate over at least the dielectric layer; a first layer comprising silicon nitride on the glass substrate located over at least the first IR reflecting layer; a first layer comprising tin oxide on the glass substrate located over and contacting the first layer comprising silicon nitride; a first layer comprising zinc oxide on the glass substrate located over and contacting the first layer comprising tin oxide, so that the first layer comprising tin oxide is located between and contacting the first layer comprising silicon nitride and the first layer comprising zinc oxide; a second IR reflecting layer comprising silver on the glass substrate located over and contacting the first layer comprising zinc oxide; and at least another dielectric layer located over at least the second IR reflecting layer. 13. The coated article of claim 12, further comprising a second layer comprising zinc oxide that is located under and contacting the first IR reflecting layer. 14. The coated article of claim 12, wherein the coated article is heat treated. 15. The coated article of claim 12, further comprising a second layer comprising tin oxide located under and contacting the first layer comprising silicon nitride. 16. The coated article of claim 12, wherein the coated article comprises a heat treated glass substrate which supports the coating, and when measured monolithically following heat treatment has a visible transmission of at least 75% and a sheet resistance (Rs) of less than or equal to 3.0 ohms/square. 17. The coated article of claim 12, wherein the coated article comprises a heat treated glass substrate which supports the coating, and when measured monolithically following heat treatment has a visible transmission of at least 77% and a sheet resistance (Rs) of less than or equal to 2.5 ohms/square. 18. The coated article of claim 12, wherein the coated article comprises a heat treated glass substrate which supports the coating, and when measured monolithically following heat treatment has a visible transmission of at least 78% and a sheet resistance (Rs) of less than or equal to 2.1 ohms/square. 19. The coated article of claim 12, wherein the coated article is an IG window unit having a visible transmission of at least 60%, and a SHGC value of less than or equal to 0.40.