Patent ID: 6861806

Claim:
Super-high pressure discharge lamp of the short arc type which comprises: an arc tube portion in which there is a pair of opposed electrodes and which is filled with at least 0.15 mg/mm 3 mercury; and side tube portions which extend from opposite sides of the arc tube portion, in which the electrodes are partially hermetically enclosed and in which the electrodes are connected to outer leads via metal foils, the electrodes and metal foils being joined to one another by a welded connection, wherein the metal foils have a portion at one end that overlaps an end portion of the electrode and have a width in the area of the welded connection to the electrodes and to the full extent of said overlap that is less than the diameter of the electrodes in the area of the welded connection; and wherein the diameter of the electrode in the area of the welded connection and the extent of the overlap in the area of the welding site is 0.8 mm and the width of the metal foil is 0.5 mm.