Heat treatable coated article with dual layer overcoat

US7153577B2 · kind B2 · utility

Assignees

• Guardian Industries Corp. · US
• Centre Luxembourgeois de Recherches pour le Verre et la Ceramique S.A. (C.R.V.C.) · LU

Inventors

• Hong Wang · Belleville, US
• Anton Dietrich · Fontnas, CH

Key dates

• Filing date: Jun 30, 2003
• Grant date: Dec 26, 2006
• Expiry date: Aug 4, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2217/78
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A coated article is provided so as to include an overcoat having an outermost layer including silicon nitride which overlies an underlayer including a metal oxide (MOx) or a metal oxynitride (MOxNy), where the metal (M) is selected from the group of Cr, Nb, Hf, Ta, and/or combinations thereof. Such an overcoat provides for good mechanical and chemical protection in the context of heat treatable coated articles. Coated articles herein may be used in the context of insulating glass (IG) window units, architectural or residential monolithic window units, vehicle windows, and/or the like.