Patent ID: 8253188

Claim:
A semiconductor storage device comprising: a semiconductor substrate; a first insulating film; a laminated insulating film comprising a second insulating film having fixed charges more than those of the first insulating film; a single-layer insulating film; a plurality of memory cells between the semiconductor substrate and the first insulating film, each of the memory cells separated from an adjacent memory cell by a first cavity portion and comprising a tunnel insulating film, a charge accumulation layer, an insulating film, and a control gate electrode; a first selection gate transistor between the semiconductor substrate and the first insulating film: a second selection gate transistor between the semiconductor substrate and the first insulating film, between one of the memory cells and the first selection gate transistor, and in contact with the laminated insulating film on a first side face on a memory cell side thereof; and a high-voltage peripheral circuit transistor between the semiconductor substrate and the first insulating film, and in contact with the single-layer insulating film on a side face thereof.