| 摘要 |
PROBLEM TO BE SOLVED: To provide a lead frame which does not embrittle by hydrogen when subjected to etching and a always has a high reliable function. SOLUTION: The lead frame consists of an alloy containing, by mass, 30 to 48% Ni, 0.005 to 1% of at least one kind selected from Nb Mo, V, W, Ti, Zr, Cr and B, 0.003 to 0.02% carbon,≤50 ppm oxygen, and≤10 ppm hydrogen, and the balance Fe with inevitable impurities. A part of at least one kind selected from Nb, Mo, V, W, Ti, Zr, Cr and B is made into carbide, or the contained concentration thereof in the surface side is increased. COPYRIGHT: (C)2003,JPO |
