Patent ID: 7534497

Claim:
A method of producing coated substrates, the method comprising providing a pane having generally-opposed major surfaces and depositing upon one of said major surfaces a temperable high shading performance low-emissivity coating comprising, in sequence outwardly: (a) a first infrared-reflective film; (b) a first high absorption blocker layer deposited directly over the first infrared-reflective film, the first high absorption blocker layer being deposited as essentially pure niobium; (c) a middle coat comprising a first silicon nitride film deposited directly over the first high absorption blocker layer; (d) a second infrared-reflective film; (e) a second high absorption blocker layer deposited directly over the second infrared-reflective film, the second high absorption blocker layer being deposited as essentially pure niobium; and (f) an outer coat comprising a second silicon nitride film deposited directly over the second high absorption blocker layer; wherein the first and second high absorption blocker layers are deposited at a combined thickness of greater than 50 angstroms.