Cold cathode fluorescent lamp with molybdenum electrode

US7439676B2 · kind B2 · utility

Assignees

• Plansee SE · AT
• Schott AG · DE

Inventors

• Herman Walser · Breitenwang, AT
• Wolfram Knabl · Reutte, AT
• Gerhard Leichtfried · Reutte, AT
• Jorg Fechner · Mainz, DE
• Franz Ott · Mitterteich, DE
• Ralf Diezel · Mitterteich, DE
• Brigitte Hueber · Schwandorf, DE

Key dates

• Filing date: May 27, 2004
• Grant date: Oct 21, 2008
• Expiry date: Sep 2, 2024

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01J61/366
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A cold cathode fluorescent lamp (1) has feedthrough pins (5) made from molybdenum or a molybdenum alloy that form a glass-metal seal (6) with a glass composed of 55-75 wt. % SiO2, 13-25 wt. % B2O3, 0-10 wt. % Al2O3, 5-12 wt. % alkali oxides, 0-3 wt. % alkali earth oxides, 0-5 wt. % ZrO2, 0-10 wt. % TiO2 und 0-5 wt. % remaining oxides. The lamp has hollow cathodes (4) made from a material of the group molybdenum, molybdenum alloys, niobium, niobium alloys, and the lamp is manufactured in a compact form using conventional manufacturing parameters, and the resulting lamp has crack free, long-term vacuum-tight glass-metal seals.