Layered films for transparent substrates

C - Chemistry – Metallurgy – 03 – C

Patent

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Details

C03C 17/36 (2006.01) C03C 17/245 (2006.01) C03C 17/34 (2006.01) G02B 1/10 (2006.01) G02B 5/20 (2006.01)

Patent

CA 2315917

The invention concerns layered films for coating transparent substrates, in particular glass substrates, comprising at least one composite oxide metal film obtained by reactive cathodic spraying and containing Zn oxide and Sn oxide. Relatively to the total amount of metal, said composite metal oxide film preferably contains 0.5 to 6.5 wt. % of one or several among the elements Al, Ga, In, B, Y, La, Ge, Si, P, As, Sb, Bi, Ce, Ti, Zr, Nb, and Ta. In a layer of films containing a silver film as functional film, the composite metal oxide film can be used as top and/or bottom low reflecting coating, as diffusion barrier coating, as undercoat for a low reflecting coating and/or as top covering coat.

Un empilement de couches en vue du revêtement de substrats transparents, en particulier de substrats en verre, possède au moins une couche composite d'oxydes métalliques produite notamment par pulvérisation cathodique réactive et qui contient de l'oxyde de Zn et de l'oxyde de Sn. Par rapport à la quantité totale de métal, cette couche composite d'oxydes métalliques contient de préférence 0,5 à 6,5 % en poids de l'un ou de plusieurs des éléments Al, Ga In, B, Y, La, Ge, Si, P, As, Sb, Bi, Ce, Ti, Zr, Nb et Ta. Dans un empilement de couches qui a une couche d'argent en tant que couche fonctionnelle, la couche composite d'oxydes métalliques peut être utilisée en tant que couche anti-réflexion supérieure et/ou inférieure, en tant que couche de barrière à diffusion, en tant que sous-couche d'une couche anti-réflexion et/ou en tant que couche de couverture supérieure.

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