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

• Main Authors: Stéphane LAURENT, Ulrich BILLERT, Robert DRESE
• Format: Patent
• Language: English; Spanish
• Published: 05.07.2019
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

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). La invención se refiere a un substrato (10), especialmente un substrato de vidrio transparente, provisto con un producto de múltiples capas de película delgada que comprenden una alternancia de "n" capas metálicas funcionales (40, 80, 120) especialmente de capas funcionales basadas en plata o una aleación metálica que contiene plata, y de "(n + 1)" revestimientos anti-reflexión (20, 60, 100, 140), con n que es un número entero = 3, cada revestimiento anti-reflexión que comprende al menos una capa anti-reflexión (24, 64, 104, 114), de modo que cada capa funcional (40, 80, 120) se coloque entre dos revestimientos anti-reflexión (20, 60, 100, 140), caracterizado en que el espesor e de cada capa funcional (80, 120) es menor que el espesor de la capa funcional precedente en la dirección del substrato (10) y es tal que: ex = a ex-1, con: x es la fila de la capa funcional que inicia desde el substrato (10), x-1 que es la fila de la capa funcional precedente en la dirección del substrato (10), a que es un número tal que 0.5 = a < 1, y de manera preferente 0.5 = a = 0.95, o aún 0.6 = a = 0.95, y el espesor de la primera capa funcional metálica que inicia desde el substrato es tal que 10 = e1 = 18 en mm, y de manera preferente 11 = e1 = 15 en mm.