Patent ID: 8089121
Filing Date: 2012-01-03
Classification: H01L

Abstract:
1. A nonvolatile semiconductor memory device, comprising: a memory string which has a plurality of electrically rewritable memory cells connected in series, the memory string comprising: a semiconductor layer extending in a perpendicular direction with respect to a substrate; a conductive layer which is formed so as to surround a side surface of the semiconductor layer with a first insulating layer and a second insulating layer interposed therebetween and is configured to function as a control electrode of the memory cells; and a plurality of first charge storage layers formed between the first insulating layer and the second insulating layer, the plurality of first charge storage layers being formed in isolation from one another along a surface of the first insulating layer, and the first insulating layer being formed so as to protrude towards the semiconductor layer at a position where each of the first charge storage layers is formed.