| 摘要 |
PURPOSE:To obtain a bonding wire, hot strength thereof has approximately cold strength of a high-purity gold wire and performance thereof as a high-speed bonder can be displayed at a maximum value, by using a gold alloy wire to which a specific quantity of sodium is added. CONSTITUTION:A gold alloy wire in which 0.0001-0.01wt% sodium is made to contain in not less than purity 99.99wt% gold is used. Both cold strength and hot strength augment with the increase of the content of sodium, but a ball shape is not formed to a true sphere when the content of sodium exceeds 0.01wt%. Its tensile strength is larger than that of a pure gold wire, and disconnection during wire drawing working is also reduced remarkably. |
