| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bonding ribbon that homogeneously bonds over the whole surface of a junction surface each time even if the bonding is made several tens of thousand times, and achieves a stable bonding strength. <P>SOLUTION: There is provided an aluminum ribbon for ultrasonic bonding consisting of an aluminum alloy of ≥99 mass% in purity, which includes the additive element and the balance composed of aluminum. This ribbon has an extremely thin tape structure obtained by rolling after multistage wire drawing, the average of the crystal grain diameter in the cross-section of the ribbon is 5 to 200 μm, and a ratio of thickness to width of the ribbon is 1/2 to 1/20. Preferably, an aspect ratio (width direction/thickness direction) of the crystal grain diameter is 0.5 to 10, and a mirror finish is made with a surface roughness of R<SB>z</SB>≤2 μm. <P>COPYRIGHT: (C)2010,JPO&INPIT |
