Patent ID: 8669608

Claim:
A nonvolatile semiconductor storage device comprising: a first stacked body provided above a substrate and including a plurality of electrode layers and a plurality of first insulating layers alternately stacked layer by layer; a second stacked body provided above the first stacked body and including a select gate and a second insulating layer provided above the select gate; a memory film provided on a sidewall of a first portion of a through hole penetrating through the first stacked body and the second stacked body in stacking direction, the first portion penetrating through the first stacked body; a gate insulating film provided on a sidewall of a second portion of the through hole penetrating through the select gate and a sidewall of a third portion of the through hole penetrating through the second insulating layer; a channel body provided inside the gate insulating film and inside the memory film; a third insulating layer provided inside the channel body and including silicon oxide occluding a boundary portion between the second portion and the third portion in the through hole; a first embedded portion including silicon provided above the boundary portion in the third portion; and a second embedded portion provided above the first embedded portion in the third portion, being in contact with the channel body, and including silicon having higher impurity concentration than the first embedded portion.