Patent ID: 6942923
Filing Date: 2005-09-13
Classification: C03C

Abstract:
1. A coated article including a coating supported by a glass substrate, the coating comprising: first and second infrared (IR) reflecting layers comprising silver (Ag); a first dielectric layer having an index of refraction n<=3.0 provided between the first IR reflecting layer and the glass substrate; a second dielectric layer having an index of refraction 1.8<=n<2.2 provided between the first and second IR reflecting layers, wherein the second dielectric layer has an index of refraction n less than the index of refraction n of the first dielectric layer; a third dielectric layer comprising silicon oxynitride provided over the first and second IR reflecting layers, said third dielectric layer comprising silicon oxynitride having an index of refraction n less than the index of refraction n of the second dielectric layer; wherein the coated article has a visible transmission of at least wherein each of the first and second IR reflecting layers comprising Ag is sandwiched between and contacts a pair of contact layers, and wherein at least one of the contact layers adjacent each IR reflecting layer comprises at least one of NiCr, NiCrO at least one of the contact layers comprises Ni and Cr.