WIRE BONDING CAPILLARY TOOL HAVING MULTIPLE OUTER STEPS

摘要

A BONDING TOOL FOR BONDING A FINE WIRE TO A SUBSTRATE, SAID BONDING TOOL COMPRISING AN AT LEAST SUBSTANTIALLY CYLINDRICAL PORTION HAVING A CONCENTRIC CAPILLARY THEREIN THROUGH WHICH THE FINE WIRE RUNS; A WORKING TIP PORTION FORMED AT AN END OF THE CYLINDRICAL PORTION BEING TAPERED TOWARDS THE TIP THEREOF, SAID WORKING TIP PORTION HAVING AN ANNULAR CHAMFER AT THE TIP THEREOF; WHEREIN THE CONCENTRIC CAPILLARY OPENS INTO THE ANNULAR CHAMFER OF THE WORKING TIP, AND WHEREIN THE DIAMETER OF THE CYLINDRICAL PORTION DECREASES CONSECUTIVELY AT A PLURALITY OF DISCRETE INTERVALS ALONG THE LENGTH OF THE CYLINDRICAL PORTION TOWARDS THE WORKING TIP PORTION .