Coated article with IR reflecting layer(s) and method of making same
View Patent ↗A coated article is provided with at least one infrared (IR) reflecting layer. The IR reflecting layer may be of silver or the like. In certain example embodiments, a titanium oxide layer is provided over the IR reflecting layer, and it has been found that this surprisingly results in an IR reflecting layer with a lower specific resistivity (SR) thereby permitting thermal properties of the coated article to be improved.
1. A method of making a coated article, the method comprising:
providing a glass substrate;
forming a dielectric layer on the substrate;
forming an IR reflecting layer comprising silver on the substrate over at least the dielectric layer;
depositing a layer comprising titanium oxide on the substrate over the IR reflecting layer in a manner so that the layer comprising titanium oxide as deposited is more oxided at a location therein further from the IR reflecting layer than at a location closer to the IR reflecting layer.
2. The method of claim 1 , further comprising coupling the glass substrate with the recited layers thereon to another substrate in forming an IG window unit, wherein the IG window unit has a U-value of no greater than 1.15 W/(m 2 K).
3. The method of claim 1 , wherein the IR reflecting layer comprising silver has a specific resistivity (SR) of no greater than 4.6 micro-ohms.cm.
4. The method of claim 1 , further comprising forming a layer comprising an oxide of Ni and/or Cr that is located between and contacting the IR reflecting layer and the layer comprising titanium oxide.
5. The method of claim 1 , wherein said dielectric layer comprise zinc oxide.
6. The method of claim 1 , wherein said depositing comprises sputtering.
7. The method of claim 1 , wherein said forming the IR reflecting layer comprises sputtering the IR reflecting layer.
8. The method of claim 1 , further comprising forming a dielectric layer comprising titanium oxide directly on the glass substrate, so that said dielectric layer is located over said dielectric layer comprising titanium oxide.
9. The method of claim 8 , wherein said dielectric layer comprising titanium oxide comprises TiO 2 .