ELECTRODE, DISCHARGE LAMP AND MANUFACTURING METHOD OF ELECTRODE

摘要

PROBLEM TO BE SOLVED: To provide an electrode capable of reducing inclination with respect to an electrode rod of a cup-like electrode. SOLUTION: This electrode is equipped with the electrode rod 6 having one end connected to a bottom plate 7a of the cup-like electrode 7. The bottom plate 7a of the cup-like electrode 7 is supported by a peripheral edge part 6a on one end face of the electrode rod 6, and a central part 7b of the bottom plate of the cup-like electrode 7 is welded to a central part 6b on one end face of the electrode rod 6 by laser-welding. The one end face of the electrode rod 6 is nearly perpendicularly intersected with the axial center of the electrode rod 6; and the surface roughness of the one end face is set to 1 to 10μm by the maximum height Rmax. COPYRIGHT: (C)2006,JPO&NCIPI