LOW-EMISSIVITY GLAZING

摘要

The invention relates to low-emissivity glazing units that are capable of undergoing a heat treatment and only change very little in properties when they are subjected to such a heat treatment. They comprise a transparent substrate provided with a stack of thin layers of the type: first dielectric coating / infrared radiation reflecting functional layer / barrier layer / second dielectric coating. They are characterised by a first dielectric coating comprising a layer made from an oxide, in direct contact with the substrate, by a barrier layer based on zinc oxide or consisting of an indium oxide possibly doped with tin, and by a second dielectric coating comprising, in order, a layer made from an oxide other than silicon oxide with a thickness greater than 5 nm and a layer made from a silicon nitride or a silicon oxide with a thickness greater than 10 nm.