High quality emission control coatings, emission control glazings, and production methods
First Claim
1. A multiple-pane insulating glazing unit comprising an exterior pane having opposed first and second major surfaces, the multiple-pane insulating glazing unit further including an interior pane, the multiple-pane insulating glazing unit having at least one between-pane space, the exterior pane having an internal surface bearing a low-emissivity coating, the low-emissivity coating being exposed to a between-pane space of the multiple-pane insulating glazing unit, the interior pane having an external surface bearing an emission control coating comprising a transparent conductive film comprising indium tin oxide and having a thickness of between 1,100 angstroms and 1,500 angstroms over which there is an oxygen barrier film comprising silicon nitride or silicon oxynitride and having a thickness of between 400 angstroms and 750 angstroms, wherein the oxygen barrier film comprising silicon nitride or silicon oxynitride is exposed and configured to be positioned to face an environment inside a building, the emission control coating having a sheet resistance of less than 20 ohms/square, an emissivity of less than 0.25, a haze of less than 0.3, and a roughness Ra of less than 3 nm, said coated interior pane having a monolithic visible transmission of greater than 75%, the multiple-pane insulating glazing unit having a U value of less than 0.3.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention provides emission control coatings. The coating includes a transparent conductive film over which there is an oxygen barrier film. In some embodiments, the transparent conductive film comprises indium tin oxide and the oxygen barrier film comprises silicon nitride.
-
Citations
18 Claims
- 1. A multiple-pane insulating glazing unit comprising an exterior pane having opposed first and second major surfaces, the multiple-pane insulating glazing unit further including an interior pane, the multiple-pane insulating glazing unit having at least one between-pane space, the exterior pane having an internal surface bearing a low-emissivity coating, the low-emissivity coating being exposed to a between-pane space of the multiple-pane insulating glazing unit, the interior pane having an external surface bearing an emission control coating comprising a transparent conductive film comprising indium tin oxide and having a thickness of between 1,100 angstroms and 1,500 angstroms over which there is an oxygen barrier film comprising silicon nitride or silicon oxynitride and having a thickness of between 400 angstroms and 750 angstroms, wherein the oxygen barrier film comprising silicon nitride or silicon oxynitride is exposed and configured to be positioned to face an environment inside a building, the emission control coating having a sheet resistance of less than 20 ohms/square, an emissivity of less than 0.25, a haze of less than 0.3, and a roughness Ra of less than 3 nm, said coated interior pane having a monolithic visible transmission of greater than 75%, the multiple-pane insulating glazing unit having a U value of less than 0.3.
-
10. A multiple-pane insulating glazing unit including an outboard pane and an inboard pane, the insulating glazing unit having at least one between-pane space, the insulating glazing unit having an internal surface bearing a low-emissivity coating that includes at least one film comprising silver and that is exposed to said between-pane space, the inboard pane having a room-side external surface bearing an emission control coating comprising a transparent conductive film comprising indium tin oxide and having a thickness of between 1,100 angstroms and 1,500 angstroms over which there is an oxygen barrier film comprising silicon nitride or silicon oxynitride and having a thickness of between 400 angstroms and 750 angstroms, wherein the oxygen barrier film comprising silicon nitride or silicon oxynitride is exposed and configured to be positioned to face a room-side environment inside a building, the emission control coating being a heat treated coating having a sheet resistance of less than 20 ohms/square, an emissivity of less than 0.25, a haze of less than 0.3, and a roughness Ra of less than 3 nm, said coated interior pane having a monolithic visible transmission of greater than 80% and being characterized by a Δ
- Tvis due to heat treatment of at least +5% and a Rsheet decrease of 20 ohms/square or more, the multiple-pane insulating glazing unit having a U value of less than 0.3 and a visible transmittance Tv of greater than 0.6.
- View Dependent Claims (11, 12, 13, 15, 18)
Specification