Highly heat-resistant low-emissivity multilayer system for transparent substrates

US8043707B2 · kind B2 · utility

Assignee

• SAINT-GOBAIN GLASS FRANCE · FR

Inventors

• Heinz Schicht · Bethau, DE
• Uwe Schmidt · Falkenberg, DE
• Pierre-Alain Gillet · Marly-le-Roi, FR

Key dates

• Filing date: Mar 28, 2007
• Grant date: Oct 25, 2011
• Expiry date: Sep 26, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31601
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A low-emissivity multilayer system highly resistant to heat treatment for transparent substrates, in particular for window panes comprises, starting from the substrate, at least a lower antireflection coating consisting of several partial layers and including a layer essentially consisting of ZnO which is adjacent with a silver-based functional layer, an essentially metallic blocking layer located on top of the silver-based layer, an upper antireflection coating consisting of several partial layers and a cover coating optionally consisting of several partial layers. The upper antireflection coating has: a partial layer of ZnO or a mixed oxide ZnMeOx that contains ZnO or a succession of layers of mixed oxides of the ZnO:Al/ZnMeOx type; a partial layer of Si3N4 or SixOyNz; and between these two partial layers, a separating layer with a thickness of 0.5 to 5 nm, consisting of a metal oxide or a mixed oxide with a cubic crystal lattice, which prevents direct contact between these two partial layers. Coated window panes that are highly resistant to technical handling operations comprising an inserted separating layer that makes it possible to further improve the mechanical and chemical …