Patent ID: 7354804

Claim:
A method of fabricating a lead frame for a semiconductor device, the lead frame having a lead to be electrically connected to the semiconductor chip within sealing resin, the lead being to be sealed into the sealing resin such that at least a part of a lower surface thereof is exposed from a lower surface of the sealing resin, the method comprising: a punching step for forming the lead by punching processing in a direction from the lower surface to an upper surface thereof; a coining step for subjecting the lead to coining processing from a side of the upper surface thereof after the punching processing, a front end lower surface coining step for subjecting a front end of the lead to coining processing from a side of the lower surface after the punching processing; and a side edge shaping step for shaping a side edge of the lead by a metal mold after the punching processing, the side edge shaping step being performed on a region of the lead spaced apart from the front end of the lead.