Semiconductor device with stacked-semiconductor chips and support plate
A semiconductor device comprises a plurality of semiconductor chips stacked in the direction of thickness. Each of the semiconductor chips includes an upper surface formed with electrodes. The semiconductor device further comprises a plurality of terminal portions disposed beside these semiconductor chips, and a plural pieces of wire for electrical connection from the electrodes to respective terminal portions. Each of the terminal portions is at an elevation lower than the highest electrodes, and higher than the lowest electrodes.
1. A semiconductor device comprising:
a stack of semiconductor chips including a first semiconductor chip and a second semiconductor chip, the first semiconductor chip having a first group of bump electrodes and a second group of bump electrodes directed toward the second semiconductor chip, the second semiconductor chip having a group of bump electrodes directed toward the first semiconductor chip in corresponding relationship to the first semiconductor chip; and
a supporting plate for supporting the stack of semiconductor chips, the supporting plate having an outer portion located outside the first semiconductor chin and provided with terminals in corresponding relationship to the second group of bump electrodes of the first semiconductor chip for enabling direct contact with the second group of bump electrodes;
wherein the supporting plate is arranged at an intermediate height between an uppermost surface and a lowermost surface of the stack of semiconductor chips;
wherein the supporting plate is formed with at least one opening in which the first group of bump electrodes of the first semiconductor chip are held in direct contact with the group of bump electrodes of the second semiconductor chip for wireless connection, the supporting plate also having an inner supporting portion interposed between the first semiconductor chip and the second semiconductor chip, the at least one opening separating the inner portion of the supporting plate from the outer portion of the separating plate; and
wherein the second group of bump electrodes are held in direct contact with the terminals of the supporting plate for wireless connection at the at least one opening.
2. The semiconductor device according to claim 1 , wherein the supporting plate is made of a thin film of synthetic resin, and the supporting portion of the supporting plate is at a central position.
3. The semiconductor device according to claim 2 , wherein the second group of bump electrodes of the first semiconductor chip are also arranged in the opening of the supporting plate, the terminals of the supporting plate extending inwardly into the opening for direct connection to the second group of bump electrodes of the first semiconductor chip.
4. The semiconductor device according to claim 3 , wherein the terminals of the supporting plate are bent toward the first semiconductor chip in the opening of the supporting plate.