| 摘要 |
PURPOSE:To improve the electric conductivity, heat conductivity and strength by adding prescribed percentages of Zn, Co and Y or a rare earth element to Cu. CONSTITUTION:This alloy for a lead frame consists of, 10-40wt% Zn, 0.1- 9wt% Co, 0.01-5wt% Y or rare earth element and the balance Cu. Sm, Pr or misch metal is used as the rare earth element. The alloy is used in the manufacture of IC, LSI or the like and has superior electric conductivity, heat conductivity and strength.
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