Patent ID: 7981516

Claim:
A transparent substrate provided with a thin-film multilayer comprising at least one functional silver layer, having reflection properties in the infrared and/or in the solar radiation range, one metal barrier layer based on zirconium in contact with the functional layer and at least one upper dielectric layer, wherein the barrier layer is from 0.6 to less than 2 nm, and wherein the barrier layer based on zirconium is situated beneath or above the functional silver layer such that: the barrier layer based on zirconium is situated above and in contact with the functional silver layer and the upper dielectric layer comprises at least one ZnO-based layer is situated above and in contact with the barrier layer; or the barrier layer based on zirconium is situated beneath and in contact with the functional silver layer and the upper dielectric layer comprises at least one ZnO-based layer is situated above and in contact with the functional silver layer or an upper barrier layer based on nickel-chromium, titanium, or niobium, wherein said multilayer substantially retains its properties, after a heat treatment at a temperature of at least 500° C.