Heavy copper wire bonding ready for industrial mass production

1. Reference bonding with tungsten carbide tool and reference parameters showed strong wear. 2. Tool wear and optical appearance of bond foot and tool tip do not correlate linearly with bond strength. 3. Increased micro-slip between tool and wire and tool touchdowns during bonding indicate tool's EOL. Therefore the shear values will decrease. 4. Cermet-tipped tool showed little improvement in bond tool lifetime over the tungsten carbide. 5. Optimizing bond parameters had a major impact and increased the bond tool lifetime by a factor of 4. 6. Changing cutter blade tip from hardened steel to cemented carbide improved cutting up to 1,000,000 cuts. 7. Wire guide showed reasonable lifetime of up to 500,000 bonds without optimization. 8. Machine data allowed online monitoring of bond tool wear to trigger optimal bond tool change.