发明名称 |
Booglamp met een paar molybdeem folies, en werkwijze voor vervaardiging daarvan. |
摘要 |
The invention is directed to preventing occurrence of molybdenum foil breakage during a pinch sealing operation in a method of fabricating an arc tube having a pair of molybdenum foils pinch-sealed on both sides of a spherical portion of a glass tube by sequentially pinch-sealing the respective molybdenum foils. A first molybdenum foil is not pinch-sealed (first pinch seal) with an inert gas introduced into a glass tube as in a conventional embodiment, but is pinch-sealed with the internal pressure of the glass tube maintained at a vacuum of 0.5 torr or less. As a result, oxidation of the molybdenum foils causing breakage of the molybdenum foils during a pinch sealing operation is minimized. Hence, an arc tube having each of a pair of molybdenum foils made of molybdenum whose purity is 99.95% or more and with a thickness of 20 mu m or less can be fabricated. |
申请公布号 |
NL1005495(A1) |
申请公布日期 |
1997.09.15 |
申请号 |
NL19971005495 |
申请日期 |
1997.03.11 |
申请人 |
KOITO MANUFACTURING CO., LTD. |
发明人 |
KUNIO FUKAI;NOBUO OHKAWAI;MASAKAZU NAGASAWA |
分类号 |
H01J9/32;H01J61/36 |
主分类号 |
H01J9/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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