Patent ID: 7439676

Claim:
A cold cathode fluorescent lamp, comprising: a discharge envelope of hard glass, said discharge envelope having a phosphor coating on an inner surface thereof and containing a filling gas component capable of emitting UV light; a plurality of hollow cathodes inside said discharge envelope; a plurality of feedthrough pins connected to said hollow cathodes; and a plurality of glass-metal seals joining said feedthrough pins to the said discharge envelope in a vacuum-tight seal; wherein: said feedthrough pins have a diameter of 0.4-1.2 mm and are made of Mo-La 2 O 3 at least along a length of said glass-metal seal; said hollow cathode is made at least in part from a material selected from the group consisting of molybdenum and molybdenum alloy; said hard glass, in a region of said glass-metal seals, having a coefficient of thermal expansion of 4.2−5.2×10 −6 K −1 and the following composition: SiO 2 55-75 wt. %, B 2 O 3 13-25 wt. %, Al 2 O 3 0-10 wt. %, alkali oxides 5-12 wt. %, alkali earth oxides 0-3 wt. %, ZrO 2 0-5 wt. %, TiO 2 0-10 wt. %, a remaining oxide content of 0-5 wt. %.