Patent ID: 7214622

Claim:
A manufacturing method of a semiconductor device for flip chip bonding of a semiconductor chip to be performed, comprising the steps of: (a) preparing a wiring substrate having a main surface and a back surface, a plurality of first terminals for flip chip bonding being formed constituting a row in the main surface, a dummy terminal being formed at an end portion of the row of the first terminals, and having a second terminal whose surface is covered by precious-metal plating approaching the plurality of first terminals; (b) forming a solder layer over the plurality of first terminals by forming a condition that flux containing particles of solder is applied to an area including the row of the plurality of first terminals, melting the solder by heating the flux after that, and suppressing a flow of the flux with the dummy terminal, wherein in the step (b), a solder layer is formed over the plurality of first terminals by applying solder powders containing particles of solder to the area including the row of the plurality of first terminals, then applying flux, furthermore melting the solder by heating the flux performing reflow, and suppressing a flow of the flux with the dummy terminal; (c) arranging the semiconductor chip over the main surface of the wiring substrate; and (d) performing flip chip bonding of the semiconductor chip at the wiring substrate connecting a projection electrode connected over an electrode of the semiconductor chip, and the solder layer over the first terminal by thermo compression bonding.