Patent ID: 8808864

Claim:
An IG window unit including a coating supported by a glass substrate, the coating from the glass substrate outwardly comprising: at least one dielectric layer; a layer comprising zinc oxide over the at least one dielectric layer; an infrared (IR) reflecting layer comprising silver on the glass substrate, located over and directly contacting the layer comprising zinc oxide, wherein the coating includes only one IR reflecting layer; a layer comprising an oxide of Ni and/or Cr located over and directly contacting the IR reflecting layer comprising silver; an overcoat comprising (i) a layer comprising tin oxide located over the layer comprising the oxide of Ni and/or Cr and (ii) a layer comprising silicon nitride located over and contacting the layer comprising tin oxide, wherein in the overcoat the layer comprising tin oxide and the layer comprising silicon nitride have substantially equal thicknesses plus/minus 10% in order to improve thermal cycling performance and durability of the coating, and wherein the layer comprising tin oxide and the layer comprising the oxide of Ni and/or Cr in the overcoat has a thickness of from about 160-180 angstroms; and wherein the IG unit has an SHGC value of at least 0.65, a visible transmission of at least 70%, and an Energy Rating of at least 25.