Stock material or miscellaneous articles – Composite – Of quartz or glass
Reexamination Certificate
2007-03-28
2011-10-25
Blackwell, Gwendolyn (Department: 1784)
Stock material or miscellaneous articles
Composite
Of quartz or glass
C428S423300, C428S689000, C428S698000, C428S699000, C428S701000, C428S702000, C428S704000
Reexamination Certificate
active
08043707
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 ZnMeOxthat contains ZnO or a succession of layers of mixed oxides of the ZnO:Al/ZnMeOxtype; a partial layer of Si3N4or 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 properties of the multilayer system.
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Gillet Pierre-Alain
Schicht Heinz
Schmidt Uwe
Blackwell Gwendolyn
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Saint-Gobain Glass France
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