Patent ID: 7759162

Claim:
A flip chip mounting process comprising: (a) preparing a wiring substrate having a plurality of electrode terminals; (b) supplying a resin comprising solder powder and a convection additive onto the wiring substrate; (c) heating the wiring substrate to a temperature that is at or above a boiling point of the convection additive and the melting point of the solder powder, thereby enabling the solder powder to melt, wherein the heating of the wiring substrate causes the convection additive to boil, thereby transforming the convection additive to a gas state within the resin, and wherein convective movement of the convection additive facilitates movement of the solder powder which assembles around the electrode terminals to form bumps on the electrode terminals; (d) disposing a semiconductor chip, having a plurality of connecting terminals, over the wiring substrate such that the connecting terminals come into contact with the bumps, respectively; (e) heating the wiring substrate up to a temperature that enables the bumps to melt thereby forming electrical connections between the electrode terminals of the wiring substrate and the connecting terminals of the semiconductor chip; and (f) contacting a surface of the supplied resin with a plate, prior to heating the wiring substrate, to prevent the boiling convection additive from escaping as gas through the surface of the supplied resin during the heating step.