Kioxia Corporation

Emiri Takada

Naofumi Abiko

[Problem] To provide a semiconductor storage device capable of reducing the load on a controller. [Solution] According to one embodiment, a semiconductor storage deviceincludes a memory cell arrayincluding a plurality of memory cell transistors MT, a plurality of word lines WL connected to gates of the respective memory cell arrays, a voltage generation circuitgenerating a voltage applied to each of the word lines WL, and a sequencercontrolling an operation of the memory cell array. The sequencerrepeats a loop including a program operation and a verify operation multiple times in a write operation. The sequencercontrols an operation of the voltage generation circuitso that a rate increase in a voltage applied to a non-selected word line in the verify operation of a last loop is smaller than the rate increase in the voltage applied to the non-selected word line in the verify operation of a first loop.

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Hiratsuka Kanagawa, Japan

Emiri Takada