Substrate provided with a multilayer that has thermal properties and which comprises four functional metal layers and use of said substrate

摘要

A transparent glass substrate (10), provided with a multilayer of thin films comprising an alternation of four functional metal layers (40, 80, 120, 160), especially functional layers based on silver or a metal alloy containing silver, and five anti-reflective coatings (20, 60, 100, 140, 180), each anti-reflective coating containing at least one anti-reflective layer, so that each functional metal layer (40, 80, 120, 160) is arranged between two coatings antireflectants (20, 60, 100, 140, 180), the thickness of the second, third and fourth functional metal layers (80, 120, 160) being from the substantially identical substrate, with a ratio of the thickness of a layer to the thickness of the preceding layer that is between 0.9 and 1.1 including these values, and characterized in that the thickness of the first functional metal layer (40) is approximately half the thickness of the second layer m functional metal (80), with a ratio of the thickness of the second metal layer to the thickness of the first functional metal layer (40) that is between 1.9 and 2.2 including these values.