Nonvolatile semiconductor memory device having uniform operational characteristics for memory cells

摘要

A NAND-type nonvolatile semiconductor memory device comprising a cell string that comprises a dummy cell interposed between and connected in series to a string selection transistor and a nonvolatile memory cell is provided. The NAND-type nonvolatile semiconductor memory device further comprises a dummy word line driver adapted to activate a dummy word line to gate the dummy cell.