Multiple-layer heat barrier

Abstract

To provide a heat barrier structure, for example a polyester or glass substrate (11, 21, 31) which includes a metal reflective layer (13, 25, 33) has, additionally, a dielectric cover layer applied, for example, in an argon-oxygen-nitrogen atmosphere, which forms a dielectric layer thereover which includes a nitride, so that the cover layer, or the layer or layers immediately adjacent the metal, will have improved resistance against external mechanical, chemical and electrochemical influences and specifically improved corrosion resistance, while retaining excellent light transmissivity characteristics and high reflection to long infrared heat radiation. The invention also provides a heat barrier structure in which a corrosion inhibiting protective layer is positioned between the transparent substrate and the metal reflective layer and the at least one dielectric cover layer. The invention also provides a heat barrier structure wherein the side of the transparent substrate which is not covered by said metal layer and said dielectric cover layer is covered by an anti-reflection layer to provide a structure having improved light transmission characteristics.

Dependencies are inferred from the claim text.