| 摘要 |
A glazing has a transparent substrate (1) with a thin film stack comprising an alternating sequence of 'n' (especially metallic) functional layers (3, 6) with IR and/or solar radiation reflective properties and 'n+1' coatings consisting of one or more layers (2a, 2b, 5a, 5b, 8a, 8b), of which at least one is of dielectric material. The novelty is that the optical quality of the stack is preserved, when the substrate is subjected to quenching, bending and annealing heat treatment, by provision of (a) an oxygen and water barrier layer below at least one of the functional layers (3, 6), especially the 'nth' layer; and (b) an absorbent layer, which is capable of absorbing the functional layer material, or a stabilising layer which stabilises the material of either the coating located above the functional layer (3, 6) and below the barrier layer or the coating located below the functional layer (3, 6). The glazing may be laminated glazing, with two or more glass substrates and one or more interposed thermoplastic foils, or 'asymmetric' laminated glazing with a glass substrate having its thin film stack covered by a polyurethane-based energy absorbing polymer foil. Also claimed is a production process for the above glazing, in which the thin film stack is applied to the glass substrate by (optionally magnetic field assisted) cathodic sputtering and then the glazing is subjected to quenching, bending and annealing heat treatment, without degradation of its optical quality. |
