摘要:
A method of flip-chip mounting a circuit device (12) to a substrate (10) in a manner that avoids damage and impairment of a fragile or otherwise sensitive element (30) on the device (12) facing the substrate (10), and a circuit assembly (60) produced thereby. The assembly (60) includes a substrate (10) having at least two sets of bonding sites (16) spaced apart from each other to define an intermediate surface region (18) therebetween. The device (12) is attached to the bonding sites (16) with solder connections (56,58), with the solder connections (56,58) being present on a surface of the device (12) that faces the substrate (10) and on which the element (30) is present so that the element (30) overlies the intermediate surface region (18) of the substrate (10). An underfill material (62) is present between the device (12) and the substrate (10) and encapsulates the solder connections (56,58). The underfill material (62) is separated from the intermediate surface region (18) of the substrate (10) so that the underfill material (62) does not contact the element (30).