Stacked semiconductor memory device
View Patent ↗A three-dimensional semiconductor memory device having the object of decreasing the interconnection capacitance that necessitates electrical charge and discharge during data transfer and thus decreasing power consumption is provided with: a plurality of memory cell array chips, in which sub-banks that are the divisions of bank memory are organized and arranged to correspond to input/output bits, are stacked on a first semiconductor chip; and interchip interconnections for connecting the memory cell arrays such that corresponding input/output bits of the sub-banks are the same, these interchip interconnections being provided in a number corresponding to the number of input/output bits and passing through the memory cell array chips in the direction of stacking.
1. A stacked semiconductor memory device, comprising:
a memory cell array chip that is stacked on a first semiconductor chip and in which sub-banks into which a bank memory is divided are organized and arranged according to input/output bits; and
interchip interconnections for connecting said memory cell array chip to said first semiconductor chip and that are provided for the number of said input/output bits and that pass through said memory cell array chip in the direction of stacking.
2. The stacked semiconductor memory device according to claim 1 , wherein said first semiconductor chip is an interface chip having an interface circuit that connect with the outside.
3. The stacked semiconductor memory device according to claim 1 , wherein said first semiconductor chip is a processor chip having a microprocessor circuit.
4. The stacked semiconductor memory device according to claim 1 , wherein said memory cell array is DRAM.
5. A stacked semiconductor memory device, comprising:
a plurality of memory cell array chips that are stacked on a first semiconductor chip and in which sub-banks into which a bank memory is divided are organized and arranged according to input/output bits; and
interchip interconnections that are provided for the number of said input/output bits for connecting said memory cell array chips such that the corresponding input/output bits of said sub-banks are the same, and that pass through the memory cell array chips in the direction of stacking of said memory cell array chips.
6. The stacked semiconductor memory device according to claim 5 , wherein said sub-banks are the divisions of a plurality of bank memories, the bank memory configuration of each memory cell array chip being the same.
7. The stacked semiconductor memory device according to claim 5 , wherein said sub-banks are the divisions of a plurality of bank memories, the bank memory configuration of each memory cell array chip being different.
8. The stacked semiconductor memory device according to claim 5 , wherein said sub-banks are the divisions of a single bank memory, the bank memory configuration of each memory cell array chip being the same.
9. The stacked semiconductor memory device according to claim 5 , wherein said sub-banks are the divisions of a single bank memory, the bank memory configuration of each memory cell array chip being different.
10. The stacked semiconductor memory device according to claim 5 , wherein each memory cell array chip is provided with an insulation means for electrically isolating said memory cell array chip from said interchip interconnections.
11. The stacked semiconductor memory device according to claim 10 , wherein:
said interchip interconnections are used for transferring data, and
said stacked semiconductor memory device further comprises a control means for controlling said insulation means such that, during the process of transferring data in any of the memory cell array chips, the other memory cell array chips are electrically isolated from said interchip interconnections.
12. The stacked semiconductor memory device according to claim 5 , wherein said first semiconductor chip is an interface chip having an interface circuit that connect with the outside.
13. The stacked semiconductor memory device according to claim 5 , wherein said first semiconductor chip is a processor chip having a microprocessor circuit.
14. The stacked semiconductor memory device according to claim 5 , wherein said memory cell array is DRAM.