NONVOLATILE SEMICONDUCTOR MEMORY
A nonvolatile semiconductor memory includes: a lower semiconductor layer; a first cell string having a plurality of memory cells formed on the lower semiconductor layer; an upper semiconductor layer formed above the lower semiconductor layer; and a second cell string having a plurality of memory cel...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A nonvolatile semiconductor memory includes: a lower semiconductor layer; a first cell string having a plurality of memory cells formed on the lower semiconductor layer; an upper semiconductor layer formed above the lower semiconductor layer; and a second cell string having a plurality of memory cells formed on the upper semiconductor layer. A memory cell formed on a crystal defect of the upper semiconductor layer among the plurality of memory cells that form the second cell string is operated as a dummy cell. |
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