Patent ID: 8264031

Claim:
A nonvolatile semiconductor memory device comprising: a semiconductor substrate; a multilayer structure provided on the semiconductor substrate and including a plurality of constituent multilayer bodies stacked on top of one another in a first direction perpendicular to a major surface of the semiconductor substrate, each of the plurality of constituent multilayer bodies including an electrode film provided parallel to the major surface, a first insulating film, a charge storage layer provided between the electrode film and the first insulating film, and a second insulating film provided between the charge storage layer and the electrode film; a first semiconductor pillar having a portion with a homogeneous width that penetrates through the multilayer structure in the first direction; a third insulating film provided between the first semiconductor pillar and the electrode film; a fourth insulating film provided between the first semiconductor pillar and the charge storage layer; a second semiconductor pillar neighboring the first semiconductor pillar in a second direction perpendicular to the first direction and penetrating through the multilayer structure in the first direction; a fifth insulating film provided between the second semiconductor pillar and the electrode film; and a sixth insulating film provided between the second semiconductor pillar and the charge storage layer.