Dip formation of flip-chip solder bumps

摘要

A process for fabricating a solder bump (113) includes providing an inorganic de-wetting substrate (102). In order to form a composite substrate (20), having the desired wetting/dewetting composition, a wetting metal is first applied on the inorganic de-wetting substrate to create at least one wetting metal pad (52). The composite substrate (20) is then dipped or otherwise immersed into a reservoir of liquid solder (106). Next, the composite substrate (20) is redrawn (116), or otherwise removed, from the liquid solder to form solder bumps (113) on the at least one metal wetting pad (52).