Patent ID: 8581329
Filing Date: 2013-11-12
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; a first stacked body including a plurality of electrode layers and a plurality of first insulating layers alternately stacked on each other on the substrate; a memory film provided on a side wall of a first hole formed through the first stacked body in a stacking direction; a first channel body provided inside the memory film in the first hole; a second stacked body provided on the first stacked body, and including a select gate and a second insulating layer provided on the select gate, the select gate provided between the first stacked body and the second insulating layer; a gate insulating film provided on a side wall of a second hole which is coupled to the first hole and is formed through the second stacked body in a stacking direction; and a second channel body provided inside the gate insulating film in the second hole and connected with the first channel body, a step part being formed between a side face of the select gate and the second insulating layer; the second channel body having a step part covering the step part formed between the side face of the select gate and the second insulating layer, and a first portion provided inside the second insulating layer; the step part of the second channel body containing an impurity; and a film thickness of the step part of the second channel body being thicker than a film thickness of the first portion of the second channel body.