Patent ID: 7339728

Claim:
A first pane having opposed first and second major surfaces, the first pane being part of a multiple-pane insulating glazing unit that includes a second pane, wherein the insulating glazing unit has at least one between-pane space, wherein the first pane has a coated interior surface that is exposed to a between-pane space of the insulating glazing unit, said coated interior surface bearing a low-emissivity coating that includes first, second, and third infrared-reflection film regions each comprising silver, the first infrared-reflection film region being closest to the first pane of the three infrared-reflection film regions, the second infrared-reflection film region being further from the first pane than the first infrared-reflection film region, the third infrared-reflection film region being further from the first pane than the second infrared-reflection film region, and wherein the second infrared-reflection film region is thicker than the first infrared-reflection film region by at least 30 angstroms, wherein the three infrared-reflection film regions have a combined thickness of greater than 460 angstroms and yet the insulating glazing unit has a visible transmittance of 0.65 or more.