Patent ID: 7344782
Filing Date: 2008-03-18
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 layer comprising silicon nitride which is located on and directly contacts a surface of the glass substrate; a first layer comprising zinc oxide located over at least the first layer comprising silicon nitride; a first infrared (IR) reflecting layer comprising silver located over and contacting the first layer comprising zinc oxide; a second layer comprising silicon nitride located over at least the first IR reflecting layer; a second layer comprising zinc oxide located over at least the second layer comprising silicon nitride; a second IR reflecting layer comprising silver located over and contacting the second layer comprising zinc oxide; a layer comprising an oxide of Ni and/or Cr located over and contacting the second IR reflecting layer; a layer comprising tin oxide located over at least the layer comprising an oxide of Ni and/or Cr; a layer comprising silicon nitride located over and contacting the layer comprising tin oxide, wherein the layer comprising tin oxide is significantly thicker than the layer comprising silicon nitride; and wherein the coated article following heat treatment, measured monolithically, has a sheet resistance of less or equal to 2.5 ohms/square, a haze value of less than or equal to 0.35, and a visible transmission of at least 80%.