Use of Ultrasonics for Integrated Circuit Chip Removal
Original Publication Date: 1980-Aug-01
Included in the Prior Art Database: 2005-Feb-13
One technique for mounting integrated circuit chips on substrates is the utilization of small solder balls. The conventional technique for removing this type of chip from a substrate is to apply heat in order to melt or reflow the solder balls. Two problems with this technique of removing chips from substrates are that there is a limit on the number of times the solder balls can be reflowed, and, furthermore, if there are a plurality of chips on the substrates, the application of heat generally reflows the solder balls on all of the chip sites.