Foil seal lamp
AssigneeUshiodenki Kabushiki Kaisha
InventorsKenzo Kai, Kaoru Nakamura, Kazunori Morikawa
Life of this patent
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Abstract
A foil seal lamp in which even when a high temperature of the seal area is reached oxidation of the molybdenum metal foils and the molybdenum outer leads which have been placed in the seal area can be reliably prevented, and in which a long service life can be obtained. is achieved by providing the surfaces of the metal foil and the outer lead which are placed in the seal areas with protective coatings of crystalline molybdate. An increase in the amount of protective coating that can be carried is produced by surface roughening the outer leads.
Claims10
Foil seal lamp in which an end of a glass bulb is provided with a seal area, and which comprises:
- a metal foil of molybdenum which is placed in the seal area, and
- a molybdenum outer lead, which has a first end connected to the metal foil and a second end that extend out of the bulb,
- wherein a protective coating having crystalline molybdate as its primary material is provided on the surfaces of both the metal foil and the outer lead in the seal area.
Dependencies are inferred from the claim text.