Patent ID: 7879448
Filing Date: 2011-02-01
Classification: B32B,C03C,C23C,Y10T

Abstract:
1. A heat treated coated article comprising a coating supported by a glass substrate, the coating comprising: a first dielectric layer comprising zinc oxide from 40-150 Å thick; a first infrared (IR) reflecting layer comprising silver located over at least the first dielectric layer comprising zinc oxide; a second layer comprising zinc oxide located over at least the first IR reflecting layer and the first dielectric layer; a second IR reflecting layer comprising silver located over and contacting the second layer comprising zinc oxide, the second IR reflecting layer comprising silver having a thickness greater than the first IR reflecting layer comprising silver; a layer consisting essentially of an oxide of NiCr located over and contacting the second IR reflecting layer; a third layer comprising zinc oxide located over and contacting the layer consisting essentially of the oxide of NiCr, the third layer comprising zinc oxide being 40-150 Å thick, the third layer comprising zinc oxide being thicker than the second layer comprising zinc oxide, and the layer consisting essentially of the oxide of NiCr being 20-45 Å thick; another dielectric layer comprising tin oxide from 40-200 Å thick located over at least the third layer comprising zinc oxide in the heat treated coated article; and when measured monolithically following heat treatment the coated article has a visible transmission of at least 80%, a sheet resistance (R