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The wire feed system is an important subsystem of typical automatic wire bonder. The resistance control of wire transmission and tensile force control are the key technologies of the wire feed system, which has a strong impact on the bonding quality. This paper describes the stress analysis of gold wire in the automatic wire bonder. The analysis is useful in the low friction wire feed system and the...
In the wire bonding process of MEMS packaging, Heat Affect Zone (HAZ) is the important factor governing the loop profile of bonding. The height of loop is affected by the length of the HAZ. Factors governing the HAZ are studied. To investigate this relationship, the experiments were done for the various sizes of wire diameter and Free Air Ball (FAB). Electric Flame-Off (EFO) current, EFO time, EFO...
This paper introduces zoom microscope into the microscope positioning system to settle the contradiction between microscopepsilas visual range and depth of field. In the whole bonding application, bond targetspsila identification and orientation are the most important aspects for full-automation. Multiple scale images go through various image processing programs, and finally different bond targets...
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