Discharge lamp and metal foil for a discharge lamp

Discharge lamp, comprising:

• a light emitting part in which there is a pair of opposed electrodes;
• hermetically sealed portions which border the opposite ends of the light emitting part and hermetically seal base parts of the electrodes;
• metal foils each of which is installed in a respective one of the hermetically sealed portions and has an end connected to the base part of a respective one of the electrodes;
• outer leads, each of which has an end connected to a base part of a respective one of the metal foils and having a base part projecting outward from the respective hermetically sealed portion,
• wherein the metal foils each have a region with a small width which has a groove-shaped overall configuration with a U-shaped cross section and with which the respective electrode is connected, and of a wide region which borders the region with a small width, and
• wherein the wide region has:
• an end Ω-region which borders a groove of the region with a small width, in which an end groove is formed, and which extends in the lengthwise direction of the metal foil,
• a base-side Ω-region which is connected to the respective outer lead, in which a base-side groove is formed, and which extends in the lengthwise direction of the metal foil, and
• a middle, flat region which extends between the end Ω-region and the base-side Ω-region in the lengthwise direction of the metal foil
• wherein the end groove comprises an end bevel which is angled in a manner gradually reducing the depth thereof in a direction toward the middle, flat region.