Patent ID: 6590342
Filing Date: 2003-07-08
Classification: H01J

Abstract:
An electric discharge lamp comprising:a light-transmissive ceramic lamp vessel; a first and a second current conductor entering the lamp vessel and each supporting an electrode in the lamp vessel; a ceramic sealing compound sealing the lamp vessel around the current conductors in a gastight manner; an ionizable filling comprising a rare gas and metal halide in the lamp vessel, at least the first current conductor having a first halide-resistant part within the lamp vessel and a second part extending from the ceramic sealing compound to the exterior of the lamp vessel, wherein the first part consists essentially of an intermetallic compound material chosen from molybdenum aluminide, molybdenum boride, pentamolybdenum trisilicide and combinations of at least two of these materials; and said ceramic sealing compound circumferentially contacts and seals at least a portion of the first part of the first current conductor adjacent the second part.