Patent ID: 8169826

Claim:
A nonvolatile semiconductor memory device, comprising: a plurality of first memory strings each having a plurality of electrically rewritable first memory transistors connected in series; a first select transistor having one end thereof connected to one end of the first memory string; a first line commonly connected to the other end of a plurality of the first select transistors; a switch circuit having one end thereof connected to the first line; and a second line commonly connected to the other end of a plurality of the switch circuits, the first memory string comprising: a first semiconductor layer including a first columnar portion that extends in a perpendicular direction to a substrate and functioning as a body of the first memory transistors; a first charge storage layer formed surrounding a side surface of the first columnar portion; and a first conductive layer formed surrounding the first charge storage layer and functioning as a gate of the first memory transistors, the switch circuit controlling electrical connection between the second line and the first line.