| 摘要 |
PROBLEM TO BE SOLVED: To provide a lead wire suitable for components of a cold cathode fluorescent lamp, a lead wire member equipped with the lead wire, an electrode member, and the cold cathode fluorescent lamp. SOLUTION: The lead wire (an inner lead wire 14i) is a wire for supplying power to an electrode part 13 of the cold cathode fluorescent lamp 10, and with a glass part 15 for sealing a glass tube 12 to house the electrode part 13 welded. The glass part 15 is structured of a lead-free soft glass. The lead wire is formed from an Fe-Ni alloy composed of Ni by 51 mass% or more and 55 mass% or less, with the balance being Fe and inevitable impurities. The lead wire made of the Fe-Ni alloy containing Ni in a specific range, is restrained from being contracted excessively without rapidly increasing a thermal expansion coefficient of the lead wire in the vicinity of a critical temperature due to the large difference between its transformation point and the critical temperature at which stress accumulates in the lead-free soft glass when the temperature reaches the transition temperature or lower. As a result, occurrence of leakage of the glass tube 12 can be reduced. COPYRIGHT: (C)2011,JPO&INPIT
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