Patent ID: 8226803

Claim:
A method of making a coated article, the method comprising: providing a glass substrate; sputtering a first lower contact layer comprising zinc oxide over a first layer comprising silicon nitride on the substrate using a first oxygen partial pressure; sputtering a first layer comprising silver directly over and contacting the first lower contact layer; sputtering a first upper contact layer directly over and contacting the first layer comprising silver; sputtering a second lower contact layer comprising zinc oxide over a second layer comprising silicon nitride, wherein the second silicon nitride layer is located over at least the first layer comprising silicon nitride, the first contact layer, the first layer comprising silver, the first upper contact layer, using a second oxygen partial pressure, wherein the first oxygen partial pressure is greater than the second oxygen partial pressure; sputtering a second layer comprising silver directly over and contacting the second lower contact layer; and sputtering a second upper contact layer directly over and contacting the second layer comprising silver.