Patent ID: 6939740

Claim:
A method for fabricating a semiconductor device, comprising: providing a semiconductor chip having a main surface on which a plurality of pads are formed; arranging a plurality of leads on the semiconductor chip through insulating layers, wherein end portions of the leads are bent by pressing so as to extend perpendicularly to the main surface and over the main surface, and wherein opposite end portions of the leads are joined to a lead frame; electrically connecting the plurality of pads to the plurality of leads, respectively; sealing the semiconductor chip and the leads with a sealing element within a mold, wherein tips of the end portions touch the mold during the sealing such that the tips of the end portions are exposed at a surface of the sealing element upon removal of the mold; forming conductive layers on the exposed tips; and dividing exposed portions of the leads projecting outside from the sealing element from the lead frame, wherein the sealing element is provided with protrusions extending near the exposed tips of the end portions of the leads, and wherein a distance between a plane of the sealing element including the exposed tips of the end portions of the leads and a plane of the sealing element including end surfaces of the protrusions is shorter than a height of the conductive layers, and wherein the conductive layers are partly melted and connected to circuits formed on a wiring board, and the protrusions of the sealing element come into contact with a surface of the wiring board when mounting the semiconductor device on the wiring board.