Patent · US Expired

Transparent zirconium oxide-tantalum and/or tantalum oxide coating

US7521871B2 · kind B2 · utility

2Cited by

6References

21Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Arnd Ritz · Eindhoven, NL
Michael Vergöhl · Destedt, DE
Berno Hunsche · Eschweiler, DE

Key dates

Filing date	Jan 21, 2004
Grant date	Apr 21, 2009
Priority date	—
Expiry date	Sep 20, 2024

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C2218/155
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

High temperature-resistant transparent coatings based on zirconium oxide, which have improved dispersion properties and a high refractive index, comprise zirconium oxide with at least one additive from the group consisting of tantalum and/or tantalum oxide, whereby the proportion of Ta atoms, in relation to the total number of metal atoms in the coating is in the range of 5 to 30%.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.