Transparent substrate which can be used alternatively or cumulatively for thermal control, electromagnetic armour and heated glazing

Abstract From the Canadian patent

The invention relates to a transparent substrate which is made for example, from glass and which is equipped with a stack of thin layers comprising a plurality of functional layers. The invention is characterised in that: (i) the aforementioned stack of thin layers comprises at least three silver-based functional layers (ii) the stack has a per-square resistance of R¿.square.? < 1.5 .OMEGA. and (iii) the substrate can be subjected to at least one processing operation involving a heat treatment at a temperature of at least 500 ·C such as to enable the substrate to be used alternatively or cumulatively to provide thermal control and/or electromagnetic armour and/or heated glazing.