Patent ID: 8441061

Claim:
A nonvolatile semiconductor memory device, comprising: a substrate; a stacked structural body provided on a major surface of the substrate, the stacked structural body including a plurality of electrode films alternately stacked with a plurality of inter-electrode insulating films in a first direction perpendicular to the major surface; a semiconductor pillar piercing the stacked structural body in the first direction; and a memory unit provided at an intersection between the semiconductor pillar and each of the electrode films, the plurality of electrode films including at least one selected from amorphous silicon or polysilicon, the stacked structural body including a first region and a second region, a distance from the second region to the substrate being greater than a distance from the first region to the substrate, the electrode films including an additive including at least one selected from germanium or phosphorus, and a concentration of the additive included in the electrode film in the first region being higher than a concentration of the additive included in the electrode film in the second region.