SUBSTRATS TRANSPARENTS REVETUS D'UN EMPILEMENT DE COUCHES MINCES A PROPRIETES DE REFLEXION DANS L'INFRAROUGE ET/OU DANS LE DOMAINE DU RAYONNEMENT SOLAIRE

摘要

A transparent substrate (1) has a thin film stack including a (pref. doped metal oxide or metal) layer (4) which is reflective in the IR and/or solar radiation region and which is located between first and second dielectric coatings (3,6). The novelty is that an intermediate layer (2) of refractive index at least 0.07 (pref. at least 0.12) lower than that of the substrate (1) is provided between the substrate (1) and the thin film stack. Also claimed are (i) low emission or sun-shielding multiple glazing incorporating at least one substrate as described above; (ii) low emission double glazing incorporating the above substrate and having an emissivity of max 0.035, a light transmission (TL) of at least 78% and a reflection colour saturation value (c*) of max. 4; and (iii) laminated glazing incorporating the above substrate and having sun-shielding properties and/or heating properties by provision of current leads for one or more metallic layers.