Patent ID: 6057644
Filing Date: 2000-05-02
Classification: H01J

Abstract:
A high pressure discharge lamp comprising a ceramic discharge tube having an inner space filled with an ionizable light-emitting material and a starting gas, plugging members each at least partially fixed to an inner side of a respective one of end portions of the ceramic discharge tube and each having a through-hole provided therein, conductive members inserted into or through the through-hole of the plugging members, respectively, and electrode units provided in said inner space, wherein a material of the plugging members is the same as that of the ceramic discharge tube, and each of the plugging members is gas-tightly joined to the corresponding conductive member with a metallizing layer, the gas-tight joining effected by providing a metallizing layer material between a through-hole of a non-fired preform of the plugging member and the corresponding conductive member and then integrally firing the non-fired preform, the metallizing layer material, and the conductive member.