Transparent substrate provided with a thin-film stack with properties in the infrared

US6020077A · kind A · utility

Assignee

• Saint-Gobain Vitrage · FR

Inventors

• Heinz Schicht · Bethau, DE
• Wulf Haussler · Jülich, DE
• Herbert Schindler · Schwieberdingen, DE
• Gerhard Ditzel · Welsau, DE
• Uwe Schmidt · Falkenberg, DE
• Wilfried Kaiser · Torgau, DE

Key dates

• Filing date: Feb 7, 1997
• Grant date: Feb 1, 2000
• Expiry date: Feb 7, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31627
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a transparent substrate, in particular glass substrate, provided with a thin-film stack including at least one metal film with properties in the infrared, in particular a low-emissivity one, arranged between two coatings which each include at least one anti-reflection film based on dielectric material, and at least one protective film based on a sacrificial metal or a partially or fully oxidized sacrificial metal or a sacrificial metal alloy placed between the said metal film and one of the said coatings. According to the invention, the film placed directly below and/or above the said metal film contains at least one of the noble metals Pd, Au, Ir, Pt and Rh. The low-level addition of one or more of these metals to the others, namely the film placed below and/or above the metal film, leads to an increase in the chemical stability and the hardness of the thin-film stack.