Prestressable low-E layer systems for window panes

US7211328B2 · kind B2 · utility

Assignee

• SAINT-GOBAIN GLASS FRANCE · FR

Inventors

• Heinz Schicht · Bethau, DE
• Herbert Schindler · Schwieberdingen, DE
• Lars Ihlo · Torgau, DE
• Uwe Schmidt · Falkenberg, DE

Key dates

• Filing date: Jan 23, 2002
• Grant date: May 1, 2007
• Expiry date: Mar 11, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C17/3657
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A multilayer film, capable of withstanding high thermal stresses, with silver as functional layer, a sacrificial metal layer placed on top of the silver layer and antireflection dielectric layers, has a metal nitride layer between the silver layer and the sacrificial metal layer. This metal nitride layer is composed in particular of Si3N4 and/or AlN and constitutes an effective diffusion barrier. The optical and energy properties of the silver layer consequently remain, for the most part, preserved, even after undergoing high thermal stresses (for example of the bending or toughening type when curving and/or prestressing a window pane provided with the multilayer film).