Invention Grant
US09214238B2 Semiconductor memory device 有权
半导体存储器件

Semiconductor memory device
Abstract:
A semiconductor memory device includes first to fourth memory cells that are stacked above a semiconductor substrate, first to fourth word lines that are connected to gates of the first to fourth memory cells, respectively, and a row decoder that applies voltages to the first to fourth word lines. The row decoder applies a first programming voltage to the first word line during a write operation performed on the first memory cell, applies the first programming voltage to the second word line during a write operation performed on the second memory cell, applies a second programming voltage to the third word line during a write operation performed on the third memory cell, and applies the second programming voltage to the fourth word line during a write operation performed on the fourth memory cell. The second programming voltage is higher than the first programming voltage.
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