Alkali-barrier layer
US8828564B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 2012 |
| Grant date | Sep 9, 2014 |
| Priority date | — |
| Expiry date | May 24, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2217/281
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A glazing incorporating a glass substrate includes, on at least one portion of its surface, a stack of layers including a barrier layer to the migration of ions contained in the substrate, especially of Na+ or K+ alkali metal type, the barrier layer being interposed in the stack between the surface of the substrate and at least one upper layer giving the glazing a functionality of the solar-control, low-emissivity, antireflection, photocatalytic, hydrophobic or other type, the barrier layer essentially consisting of a silicon oxide or a silicon oxynitride, wherein the silicon oxide or oxynitride includes one or more elements selected from the group consisting of Al, Ga and B and wherein the Si/X atomic ratio is strictly less than 92/8 in the barrier layer, X being the sum of the atomic contributions of the Al, Ga and B elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.