SUBSTRATE PROVIDED WITH A MULTILAYER STRUCTURE HAVING THERMAL PROPERTIES, IN PARTICULAR FOR PRODUCING HEATED GLAZING

摘要

The invention relates to a substrate (10), especially a transparent glass substrate, provided with a thin-film multilayer structure comprising an alternation of "n" metallic functional layers (40, 80, 120), especially functional layers based on silver or a metal alloy containing silver, and "(n + 1)" antireflection coatings (20, 60, 100, 140), where n is an integer greater than or equal to 3, each antireflection coating comprising at least one antireflection layer (24, 64, 104, 144), so that each functional layer (40, 80, 120) is placed between two antireflection coatings (20, 60, 100, 140), characterized in that the thickness ex of each functional layer (80, 120) is less than the thickness of the preceding functional layer in the direction of the substrate (10) and is such that ex = aex-1, where x is the rank of the functional layer starting from the substrate (10), x-1 is the rank of the preceding functional layer in the direction of the substrate (10), and a is a number such that 0.5 < a < 1, preferably 0.5 < a < 0.95, or even 0.6 = a = 0.95, and the thickness of the first functional metallic layer starting from the substrate is such that 10 = e1 = 18 (in nm), preferably 11 = e1 = 15 (in nm).