Patent ID: 7851849

Claim:
A nonvolatile semiconductor storage device comprising: a substrate; a plurality of stacked units juxtaposed on a major surface of the substrate, each stacked unit aligning in a first direction parallel to the major surface; a gate electrode aligning in a second direction parallel to the major surface and non-parallel to the first direction; a charge storage layer; a first insulating film; and a second insulating film, each of the plurality of stacked units including a plurality of stacked semiconductor layers via an insulating layer, spacings between adjacent stacked units having a first spacing and a second spacing larger than the first spacing, the first spacing and the second spacing being alternately provided, the second spacing being provided at a periodic interval four times a size of a half pitch F of the bit line of the device, the gate electrode including a protruding portion entering into a gap between the stacked units, the gap having the second spacing, the charge storage layer being provided between a side face of the semiconductor layers and the protruding portion, the first insulating film being provided between the side face of the semiconductor layers and the charge storage layer, and the second insulating film being provided between the charge storage layer and the protruding portion.