Patent ID: 6416890
Filing Date: 2002-07-09
Classification: C03C

Abstract:
A transparent glass sheet carrying a coating of at least two pyrolytically-formed layers, the so-coated sheet havinga neutral or blue tint in transmission and in reflection, a luminous transmittance (TL) which is in the range 30 to 85% and a selectivity of greater than 1 the at least two pyrolytically-formed layers comprising, in order from the glass sheet; 1) a conductive or semi-conductive layer having a thickness in the range 15 to 500 nm and formed of a material comprising a metal oxide containing a dopant in an amount of from 1 to 100 moles per 100 moles of the metal oxide, the said metal oxide being selected from one or more of tungsten trioxide (WO3), molybdenum trioxide (MoO3), niobium pentoxide (Nb2O5), tantalum pentoxide (Ta2O5), vanadium pentoxide (V2O5) and vanadium dioxide (VO2); and 2) an overcoat layer having a thickness which is in the range 5 to 60 nm.