Patent ID: 6897552

Claim:
A semiconductor device wherein chips are stacked to have a fine pitch structure, comprising: at least two stacked chip-mounting members, the chip-mounting members having a main surface provided with at least one lead having a width, the at least one lead having a predetermined surface including a plated portion covered with a thin film; a plurality of semiconductor chips including a main surface on which at least one bump is formed, the bump having a width substantially greater than or equal to the width of the lead and being electrically connected to the lead via the plated portion, at least one of the semiconductor chips being mounted on each of the chip-mounting members; at least one intermediate base arranged between the chip-mounting members, the base being provided with at least one interconnecting line and at least one interconnecting terminal, the at least one interconnecting line and at least one interconnecting terminal being electrically connected to the semiconductor chips; and an encapsulating member provided between the semiconductor chips and the chip-mounting-members.