Conference
Free-air Ball Formation and Deformability with Pd Coated Cu Wire
Abstract
With 20 μm diameter PCC wire, spherical (well-shaped) free-air balls (FABs) were obtained in both forming gas and N2 at flow rates between 0.25–0.75 1/min and 0.4–0.5 1/min, respectively. With Cu wire, in comparison, sperical FAB are obtained in forming gas with flow rates between 0.25 and 0.5 1/min while in N2 gas, FABs are always pointed or golf-clubbed (mis-shaped). Using a shielding gas with Au wire makes the FABs mis-shaped. The FAB …
Authors
Rezvani A; Mayer M; Shah A; Zhou N; Hong SJ; Moon JT
Pagination
pp. 1516-1522
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Publication Date
May 1, 2011
DOI
10.1109/ectc.2011.5898711
Name of conference
2011 IEEE 61st Electronic Components and Technology Conference (ECTC)