Patent ID: 8890235

Claim:
A nonvolatile semiconductor memory device comprising: a first stacked structure including a plurality of first electrode films stacked in a first direction and a first interelectrode insulating film provided between the plurality of first electrode films; a first select gate electrode stacked with the first stacked structure along the first direction, the first select gate electrode including a plurality of first select gate conductive films stacked in the first direction and a first inter-select gate conductive film insulating film provided between the plurality of first select gate conductive films; a first semiconductor pillar piercing the first stacked structure, the plurality of first select gate conductive films and the first inter-select gate conductive film insulating film in the first direction; a first memory portion provided between each of the plurality of first electrode films and the first semiconductor pillar; a first inner insulating film provided between the first memory portion and the first semiconductor pillar; a first outer insulating film provided between the first memory portion and the plurality of first electrode films; and a first select gate insulating film provided between each of the plurality of first select gate conductive films and the first semiconductor pillar, wherein ends of at least two of the plurality of first electrode films form a step.