Patent ID: 7736746
Filing Date: 2010-06-15
Classification: C03C,Y10T

Abstract:
1. A glazing suitable for undergoing a thermal treatment such as toughening or bending, comprising at least one multilayered coating deposited on a glass sheet, wherein, in sequence starting with the glass sheet, the multilayered coating comprises at least: a) a first dielectric comprising at least one layer having a thickness of 20-45 nm composed of a zinc-tin mixed oxide containing at least 12% tin; b) a first silver-based infrared reflecting layer having a thickness of 9-11 nm; c) a first barrier layer; d) a second dielectric comprising at least one layer of ZnSnOx having a thickness of 70-85 nm; e) a second silver-based infrared reflecting layer having a thickness of 13-15 nm; f) a second barrier layer; g) a third dielectric comprising at least one layer composed of a zinc-tin mixed oxide having a thickness of 20-40 nm containing at least 12% tin; and h) an upper protective layer having a thickness of 2-6 nm based on the nitride or oxynitride of Ti, Zr, Hf, V, Nb, Ta, Cr, alloys thereof, or based on the nitride or oxynitride of the alloy of one or more of these metals with Al and/or B.