Glazing comprising a functional coating
AssigneeSaint-Gobain Glass France
InventorsLaura SINGH, Rémy DODET
Life of this patent
Estimating the term…
Abstract
A material includes a transparent substrate coated with a stack of thin layers including at least one functional coating including at least one silver-based metal functional layer, and at least one niobium-based metal or nitride functional layer.
Claims21
A material comprising a transparent substrate coated with a stack of thin layers comprising at least one functional coating comprising:
- at least one silver-based metal functional layer exhibiting a thickness of between 2 and 15 nm,
- optionally at least one blocking layer chosen from metal layers, metal nitride layers, metal oxide layers and metal oxynitride layers of one or more elements chosen from titanium, nickel, chromium and tantalum,
- one or more niobium-based metal or nitride functional layers located:
- in contact with at least a portion of the silver-based functional layer or
- separated from at least a portion of the silver-based functional layer by one or more blocking layers, a sum of thicknesses of the one or more blocking layers is less than 5 nm,
- a sum of thicknesses of the one or more niobium-based functional layers, located directly in contact with or separated by a thickness of less than 5 nm from at least a portion of the silver-based functional layer, is between 4 and 20 nm.
A process for the preparation of a material comprising a transparent substrate coated with a stack of thin layers deposited by cathode sputtering, optionally magnetic-field-assisted cathode sputtering, the process comprising the sequence of following stages:
- depositing on the transparent substrate at least one functional coating comprising at least one silver-based functional layer exhibiting a thickness of between 2 and 10 nm and at least one niobium-based functional layer exhibiting a thickness of between 2 and 10 nm, located below and/or above and in contact with at least a portion of the silver-based functional layer;
- depositing a coating based on dielectric materials is deposited above the functional layer,
- subjecting the substrate thus coated is to a heat treatment.
Dependencies are inferred from the claim text.