Claims
- 1. A heat treatable or substantially haze free heat treated glazing panel carrying a coating stack comprising in sequence at least:
a glass substrate a base antireflective layer an infra-red reflecting layer, and a top antireflective layer characterised in that the base antireflective layer comprises at least one layer comprising a nitride of aluminium.
- 2. A heat treatable or substantially haze free heat treated glazing panel in accordance with claim 1 comprising in sequence at least:
a glass substrate a base antireflective layer an infra-red reflecting layer a central antireflective layer an infra-red reflecting layer a top antireflective layer characterised in that the base antireflective layer comprises at least one layer comprising a nitride of aluminium.
- 3. A heat treatable or substantially haze free heat treated glazing panel in accordance with claim 1 or claim 2, in which the at least one layer comprising a nitride of aluminium has a geometrical thickness greater than 40 Å.
- 4. A heat treatable or substantially haze free heat treated glazing panel in accordance with any preceding claim, in which the at least one layer comprising a nitride of aluminium has a geometrical thickness less than 195 Å.
- 5. A heat treatable or substantially haze free heat treated glazing panel carrying a solar control coating stack comprising in sequence at least:
a glass substrate a base antireflective layer an infra-red reflecting layer, and a top antireflective layer characterised in that the top antireflective layer comprises at least one layer comprising a nitride of aluminium having a geometrical thickness of less than 100 Å.
- 6. A heat treatable or substantially haze free heat treated glazing panel in accordance with any preceding claim, in which the base antireflective layer and the top antireflective layer each comprises at least one layer comprising a nitride of aluminium.
- 7. A heat treatable or substantially haze free heat treated glazing panel in accordance with any preceding claim, in which each antireflective layer comprises at least one layer comprising a nitride of aluminium.
- 8. A heat treatable or substantially haze free heat treated glazing panel in accordance with any preceding claim, in which the base antireflective layer comprises a first layer adjacent to the substrate comprising a nitride of aluminium and an overlying layer comprising a metal oxide.
- 9. A heat treatable or substantially haze free heat treated glazing panel in accordance with any preceding claim, in which the top antireflective layer comprises a first layer of a metal oxide and an overlying layer comprising a nitride of aluminium.
- 10. A heat treatable or substantially haze free heat treated glazing panel in accordance with claim 8 or claim 9, in which the layer of a metal oxide is a layer of a mixed oxide of zinc and aluminium.
- 11. A heat treatable or substantially haze free heat treated glazing panel in accordance with claim 10, in which the mixed oxide of zinc and aluminium has an atomic ratio Al/Zn of greater than or equal to 0.05 and less than or equal to 0.25.
- 12. A heat treatable or substantially haze free heat treated glazing panel in accordance with any preceding claim, in which heat treatment of the heat treatable glazing panel to form the substantially haze free heat treated glazing panel provokes an increase of the value of TL of the glazing panel of at least 2.5%.
- 13. A method of manufacturing a glazing panel having a haze of less than about 0.5 comprising the step of subjecting a glazing panel in accordance with any preceding claim to a heat treatment process at at least 570° C.
Priority Claims (1)
Number |
Date |
Country |
Kind |
98204319.2 |
Dec 1998 |
EP |
|
Parent Case Info
[0001] This application is a continuation in part of U.S. patent application Ser. No. 09/466,785 filed Dec. 20, 1999, and incorporated entirely herein by reference.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09466785 |
Dec 1999 |
US |
Child |
09881762 |
Jun 2001 |
US |