Patent ID: 7470568

Claim:
A method of manufacturing a semiconductor device, comprising the steps of: (a) providing a semiconductor chip including a plurality of Au bump electrodes formed over a main surface of the semiconductor chip and having a first pitch; (b) providing a film substrate including an insulating film formed with a polyimide resin, a plurality of Cu leads formed over a main surface of the insulating film and having a second pitch which is larger than the first pitch, and Sn plated over a surface of each of the plurality of leads; (c) mounting the semiconductor chip to the main surface of the film substrate so as to contact the plurality of bump electrodes of the semiconductor chip with the plurality of leads of the film substrate, respectively; and (d) electrically connecting the plurality of bump electrodes with the plurality of leads, respectively, under a first temperature which is higher than a transition point of the film substrate, while clamping a peripheral portion of the film substrate using a jig.