Patent ID: 7572511

Claim:
A coated transparent pane having opposed first and second major surfaces, said coated pane being part of a multiple-pane insulating glazing unit that includes a second pane, wherein the insulating glazing unit has a between-pane space to which the second major surface of said coated pane is exposed, said second major surface bearing a low-emissivity coating that includes the following film regions in sequence moving away from said second major surface: a first transparent dielectric film region, a first infrared-reflection film region, a second transparent dielectric film region, a second infrared-reflection film region, a third transparent dielectric film region, a third infrared-reflection film region, and a fourth transparent dielectric film region, the coating having both a sheet resistance of less than 2.5 Ω/square and an emissivity of less than 0.03, said three infrared-reflection film regions having a combined thickness of greater than 425 angstroms, the coating having a primary dielectric-region ratio that is greater than 0.34 and less than 0.75, the primary dielectric-region ratio being defined as the thickness of the first transparent dielectric film region divided by the thickness of the fourth transparent dielectric film region.