Flip chip mounting process and flip chip assembly

A flip chip mounting process comprising:

• providing a wiring substrate having a plurality of electrode terminals and a semiconductor chip having a plurality of connecting terminals;
• supplying a resin comprising solder powder and a convection additive onto a surface of the wiring substrate having the electrode terminals;
• bringing a surface of the semiconductor chip having the connecting terminals into contact with a surface of the resin so that the connecting terminals of the semiconductor chip oppose the electrode terminals of the wiring substrate;
• heating the wiring substrate up to a temperature T1 that is at or above a melting point of the solder powder and at or above a boiling point of the convection additive,
• 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;
• keeping the surface of the semiconductor chip in contact with the surface of the resin, during the heating operation, to prevent the boiling convection additive from escaping as a gas through the surface of the resin,
• wherein convective movement of the convection additive causes the molten solder powder to self-assemble in regions between the electrode terminals of the wiring substrate and the connecting terminals of the semiconductor chip, respectively, to form electrical connections between the electrode terminals and the opposing connecting terminals,
• wherein the solder powder is provided with kinetic energy of the convective motion of the boiling additive, which causes the solder powder to self-assemble at the electrode terminals of the wiring substrate and the connecting terminals of the semiconductor chip;
• and then
• curing the resin to secure the semiconductor chip to the wiring substrate.