Substrato provisto de un apilamiento que tiene propiedades térmicas, en particular para producir un acristalamiento calefactor

• Main Authors: BILLERT, Ulrich, DRESE, Robert, LAURENT, Stéphane
• Format: Patent
• Language: Spanish
• Published: 24.09.2019
• 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

Substrato (10), especialmente un substrato de vidrio transparente, provisto de un apilamiento de capas delgadas que comprende una alternancia de "n" capas funcionales (40, 80, 120) metálicas, especialmente de capas funcionales a base de plata o de una aleación metálica que contiene plata y de "(n + 1)" recubrimientos anti-reflexión (20, 60, 100, 140), siendo 5 n un número entero = 3 o 4, comprendiendo cada recubrimiento anti-reflexión al menos una capa anti-reflexión (24, 64, 104, 144), de modo que cada capa funcional (40, 80, 120) está dispuesta entre dos recubrimientos anti-reflexión (20, 60, 100, 140), caracterizado por que el espesor ex 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 = α ex-1 siendo: * x la fila de la capa funcional partiendo del substrato (10), * x-1 la fila de la capa funcional precedente en la dirección del substrato (10), * α un número tal que 0,55 <= α <= 0,95, incluso 0,6 <= α <= 0,95, y * el espesor de la primera capa metálica funcional partiendo del substrato tal que: 10 <= e1 <= 18 en nm, y de manera preferente 11 <= e1 <= 15 en nm. The invention relates to a substrate (10), especially a transparent glass substrate, provided with a thin-film multilayer comprising an alternation of "n" metallic functional layers (40, 80, 120) especially of functional layers based on silver or a metal alloy containing silver, and of "(n+1)" antireflection coatings (20, 60, 100, 140), with n being an integer 3, each antireflection coating comprising at least one antireflection layer (24, 64, 104, 144), so that each functional layer (40, 80, 120) is positioned 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=α ex−1, with: x which is the row of the functional layer starting from the substrate (10), x−1 which is the row of the preceding functional layer in the direction of the substrate (10), α which is a number such that 0.5 α<1, and preferably 0.5 α 0.95, or even 0.6 α 0.95, and the thickness of the first metallic functional layer starting from the substrate is such that: 10 e1 18 in nm, and preferably 11 e1 15 in nm.