Patent ID: 8263227

Claim:
A coated article including a coating supported by a glass substrate, the coating comprising, in this order from the glass substrate outwardly: a first dielectric layer comprising silicon nitride; a first contact layer comprising Ni and/or Cr; an infrared (IR) reflecting layer comprising silver located on the substrate over at least and contacting the first contact layer; a second contact layer comprising Ni and/or Cr located over and contacting the IR reflecting layer, the second contact layer having a thickness of less than or equal to 11 angstroms; a second dielectric layer comprising silicon nitride located over and contacting the second contact layer; and an overcoat dielectric layer comprises one or more of zirconium oxide, zirconium oxynitride, and/or zirconium silicon oxynitride located over and contacting the second dielectric layer comprising silicon nitride, and wherein the overcoat dielectric layer is doped with Al and Y.