| 摘要 |
PROBLEM TO BE SOLVED: To facilitate welding of a tungsten electrode and a molybdenum foil and improve reliability of electric connection and a lamp itself in the manufacture of a high pressure discharge lamp. SOLUTION: When a tungsten electrode 2 and a molybdenum foil 3 are welded, the axis part of the tungsten electrode 2 and the molybdenum foil 3 are contacted closely and then, a laser beam having metal melting wavelength is irradiated from the molybdenum foil 3 side to the jointing portion of the molybdenum foil 3 and the axis part of the tungsten electrode 2, and by melting both of the molybdenum foil 3 and the axis part of the electrode 2, they are jointed. COPYRIGHT: (C)2005,JPO&NCIPI
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