US 7,527,868 B2
	Transparent substrate coated with at least one thin layer
Jean-Michel Grimal, Poissy (France); and Frédéric Barrieres, Saint-Ouen (France)
Assigned to Saint-Gobain Vitrage, Courbevoie (France)
Filed on Jan. 30, 2003, as Appl. No. 10/354,081.
Application 10/354081 is a continuation of application No. 09/269077, abandoned, previously published as PCT/FR98/01598, filed on Jul. 21, 1998.
Claims priority of application No. 97 09223 (FR), filed on Jul. 21, 1997.
Prior Publication US 2003/0235719 A1, Dec. 25, 2003
Int. Cl. B32B 17/06 (2006.01)

U.S. Cl. 428—432  [428/698; 428/697; 428/701; 428/702]

19 Claims

1. A transparent glass substrate (1, 1′, 1″) coated with one or more thin layers (6, 16, 28) wherein the thin layer most distant from the glass substrate is a composition comprising silicon nitride, carbonitride, oxynitride or oxycarbonitride, said thin layer most distant from the glass substrate being covered by a second layer (7, 17) which protects against high-temperature corrosion, wherein the second layer comprises one of the following: (a) a mixture of Ti and at least one metal other than Ti whose oxide is capable of blocking or absorbing corrosive species comprising Na2O at high temperature; and (b) a metal or metal oxide which is substoichiometric in terms of oxygen, wherein the second layer comprising (a), if present, has a thickness of 2-20 nm and the second layer comprising (b), if present, has a thickness of 1-10 nm.