Patent ID: 6495251
Filing Date: 2002-12-17
Classification: C03C,C23C,Y10T

Abstract:
A coated article of the type having a coating comprising an infrared reflecting metal film between dielectric films over a surface of a substrate and a protective layer over the coating, the improvement comprising:wherein the protective layer is a sputter coated silicon oxynitride coating having the following formula Si3âˆ’2xO2xN4âˆ’4x where X is greater than 0 and less than 1 and having a composition, or mixture of a single phase or phases containing silicon, oxygen, nitrogen and a conductive element selected from the group consisting of aluminum, boron and a transitional metal wherein the weight of the conductive element is greater than 1% and less than 25% of the total weight of the silicon and the conductive element.