Patent ID: 9708215
Date: 2017-07-18
CPC Classifications: B32B,C03C,G02B,Y10T

Claim:
1. A transparent substrate comprising, on a main face: a thin-film multilayer coating comprising a metallic functional layer having reflection properties in infrared and/or in solar radiation, or based on silver or a metal alloy containing silver, and two antireflection films, the antireflection films each comprising at least two dielectric layers, the functional layer being placed between the two antireflection films, the functional layer being optionally deposited directly on an underblocker film placed between the subjacent antireflection film and the functional layer and the functional layer being optionally deposited directly beneath an overblocker film placed between the functional layer and the superjacent antireflection film, wherein each antireflection film includes at least one high-refractive-index dielectric layer located in contact with or close to the functional layer and a total optical thickness e wherein the physical thickness of all of the layers interposed between the high-refractive-index layer and the metallic functional layer does not exceed 10 nm and wherein the high refractive-index layer of the superjacent antireflective film is in direct contact with a first dielectric layer, which is not a high refractive-index layer, and the first dielectric layer is in direct contact with the functional layer or the optional overblocker film that is in direct contact with the functional layer, and wherein the high-refractive-index material of the high-refractive-index dielectric layers is predominantly in the dielectric film subjacent to the metallic functional layer such that the ratio R=e