Patent ID: 6843698
Filing Date: 2005-01-18
Classification: H01J

Abstract:
1. A method of producing an arc tube, comprising: connecting a rod electrode and a lead wire via a foil to form an electrode assembly, and inserting said electrode assembly into a quartz glass tube after a reinforcement bending process is applied to said foil, wherein: a flat face is formed in parallel to an axial direction of said lead wire at an end portion thereof; and said lead wire and said foil are connected to each other by performing a projection welding onto said flat face, with a projection being provided at an intermediate position in a longitudinal direction of said flat face where one side of said foil is placed to straddle said projection in the longitudinal direction, while said rod electrode is placed onto another side of said foil so as to secure an alignment in axial directions of said rod electrode and said lead wire.