Patent ID: 8420162

Claim:
A method of making a coated article with reduced emissivity and/or sheet resistance, the method comprising: forming a low-E coating on a glass substrate thereby resulting in a coated article, the low-E coating comprising at least one infrared (IR) reflecting layer sandwiched between at least first and second dielectric layers, wherein an uppermost layer of the low-E coating is a layer comprising silicon nitride layer; and rapidly heating the coated article comprising the low-E coating and glass substrate, said rapid heating being performed within 20-30 seconds so that (a) the emissivity and/or sheet resistance of the low-E coating decreases by at least about 3% due to the rapid heating, (b) optical properties of the low-E coating are substantially maintained during the rapid heating, and wherein the glass substrate does not exceed a temperature of about 150 degrees C. during the rapid heating; wherein the layer comprising silicon nitride which is the uppermost layer of the low-E coating is the layer of the coating closest to a source of said heating.