Fluorescent lamp and its manufacturing method

Application Number: 00107011
Application Date: 2000.04.24
Publication Number: 1271960
Publication Date: 2000.11.01
Priority Information: 1999/4/22 JP 115394/99
International: H01J61/30;H01J61/36;H01J9/40;H01J9/385
Applicant(s) Name: Matsushita Electronics Corp.
Address:
Inventor(s) Name: Oga Toshiki;Uchida Noriyuki;Chingen Nobuyuki
Patent Agency Code: 72001
Patent Agent: zhang tianan
Abstract The invention relates to a fluorescent lamp and its manufacturing method. The fluorescent lamp includes a glass tube 1, a sealed portion 6, a slender glass tube 8 and a mercury amalgam pellet 7. The slender glass tube 8 has a small-diameter part with an inner diameter smaller than the diameter of the mercury amalgam pellet 7 and a large-diameter part with an inner diameter larger than the diameter of the mercury amalgam pellet. The slender glass tube 8 is welded to the glass tube 1 so that the small-diameter part is placed in the sealed portion 6 and the large-diameter part is placed further away from the glass tube 1 than the smaller-diameter part.

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