Patent ID: 7785721

Claim:
A layer system that filters sun and heat and can be applied to glass by a vacuum coating process, said system comprising at least one metal layer system sandwiched between an upper and a lower dielectric layer system as a sandwich system in which, within the metal layer system, a metal layer comprising at least one individual layer is encapsulated by an upper and a lower intermediate layer comprising a hypostochiometrically nitrated or oxidised metal of the metal layer and in which the lower as well as the upper dielectric layer system has a stochiometric layer of a metal or semiconductor oxide or metal or semiconductor nitride as well as at least one further hypostochiometric layer of a same metal or semiconductor oxide or metal or semiconductor nitride wherein within the dielectric layer systems, the layers are positioned in such a way that in comparison to a neighbouring layer, the layer with the greater oxygen or nitrogen deficit of the metal or semiconductor oxide or metal or semiconductor nitride always lies on a side turned towards the metal layer.