Patent ID: 7153577

Claim:
A heat treatable coated article including a multi-layer coating supported by a glass substrate, wherein the coating comprises: at least one infrared (IR) reflecting layer supported by at least the glass substrate; an overcoat located over at least the IR reflecting layer for protecting at least the IR reflecting layer, wherein the overcoat comprises an outer layer comprising silicon nitride and an underlayer comprising chromium oxide, wherein the outer layer and the underlayer of the overcoat are in direct contact with one another, with the outer layer being provided over the underlayer; a contact layer comprising an oxide of at least Ni provided between the IR reflecting layer and the overcoat, said IR reflecting layer being sandwiched between and contacting each of said contact layer comprising the oxide of at least Ni and a layer comprising zinc oxide; and wherein the coating comprises first and second IR reflecting layers each comprising Ag, wherein the first and second IR reflecting layers are both located under the overcoat.