| 摘要 |
A nonvolatile semiconductor memory device includes three-dimensional cell arrays to reduce the chip size. The cell arrays each having unit cells arranged in row and column directions includes multi-layered unit block cell arrays. Based on the deposition direction of the cell arrays, a unit bank cell array includes the unit block cell arrays arranged in directions X, Y, and Z in a given group. A plurality of unit bank cell arrays are configured to perform read/write operations individually.
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