Patent ID: 6132881
Filing Date: 2000-10-17
Classification: C03C,Y10T

Abstract:
A glass substrate having a sputter coated layer system thereon which from the glass outwardly consists essentially of:a) an undercoat layer of a metal oxide or nitride having an index of refraction of 2.35-2.75;b) a layer of metallic silver; andc) an overcoat layer of a metal oxide or nitride having an index of refraction of 1.85-2.25;wherein said layers are of a thickness sufficient such that said glass article has a visible transmittance (T.sub.vis) of at least 84%, a sheet resistance (R.sub.s) of less than or equal to 5.5 ohms/sq., and a normal emissivity (E.sub.n) of less than or equal to 0.065 and wherein said layer system does not include any layer consisting essentially of a sub-stoichiometric metallic oxide located between the substrate and the layer comprised of metallic silver.