Patent ID: 7348668

Claim:
A memory card comprising: a substrate having a main surface and rear surface, opposed to the main surface; a plurality of electrodes formed on the main surface; a plurality of external connection terminals on the rear surface; a first semiconductor chip having a main surface and including a memory circuit and a plurality of bonding pads formed on the main surface thereof, the first semiconductor chip being mounted on the main surface of the substrate; a second semiconductor chip having a main surface and including a memory circuit and a plurality of bonding pads formed on the main surface thereof, the second semiconductor chip being stacked over the main surface of the first semiconductor chip; a third semiconductor chip having a main surface and including a control circuit to control the memory circuits and a plurality of bonding pads formed on the main surface thereof, the third semiconductor chip being stacked over the main surface of the second semiconductor chip; first wires electrically connecting each of the bonding pads of the first semiconductor chip with a corresponding one of the plurality of the electrodes; second wires electrically connecting each of the bonding pads of the second semiconductor chip with a corresponding one of the plurality of the electrodes; third wires electrically connecting each of the bonding pads of the third semiconductor chip with a corresponding one of the plurality of the electrodes; and a resin sealing the first semiconductor chip, the second semiconductor chip, the third semiconductor chip, the first wires, the second wires and the third wires, wherein the size of the second semiconductor chip is greater than that of the third semiconductor chip.