| 摘要 |
PURPOSE:To prevent the formation of an oxidized film of aluminum to form an excellent ball and to increase bonding strength and wire strength and to make wiredrawing workability excellent by constituting the titled alloy of Ni of specified quantity and the balance Al essentially. CONSTITUTION:Aluminum alloy for bonding wire consists of 0.5-3wt% Ni and if necessary, 0.2-2wt% one or more kinds selected among Si, Mg and Mn and/ or 0.02-0.5wt% one or more kinds selected among Zr, Ti, Cr, V, Cu, B and the balance Al essentially. At the time of forming a ball, the formation of an oxidized film of aluminum is inhibited to form the excellent ball and to increase the bonding velocity. Also, the remarkable softening and brittleness close to the ball forming parts are prevented and the reliability is increased. The aluminum alloy is large in wire strength and excellent in wiredrawing workability and inexpensive.
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