I P & T Group LLP
Semiconductor memory device and operating method thereof
A method of operating a semiconductor memory device includes performing a first program operation to simultaneously increase threshold voltages of memory cells having different target levels to sub-levels lower than the different target levels, verifying the memory cells by using different verify voltages, respectively, performing a second program operation to divide the threshold voltages of the memory cells, and performing a third program operation to increase the threshold voltages of the memory cells to the different target levels, respectively.
SK Hynix Inc.
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Chang Jin Gil Bok Sung Hoon Dong Wook Min Sang Yun Bong Sang Jo Suk Kwang Myung Su Hwang
Sunwoo Choi Cho Lee Park Lee Lee Park Kim Huh