Patent ID: 8212308

Claim:
A nonvolatile semiconductor memory comprising: an element area between two isolation insulating films adjacent in a first direction; two diffusion layers provided in the element area; a tunnel insulating film provided on the surface of the element area between the two diffusion layers; a charge storage layer provided on the tunnel insulating film; a first insulator provided on the upper surface of the charge storage layer; an inter-electrode insulating film provided on the first insulator, on the side surface of the charge storage layer in the first direction and on the isolation insulating film, and the inter-electrode insulating film having an uppermost point that is equal with an upper surface of the first insulator; and a control gate electrode which extends in the first direction and which covers the charge storage layer via the first insulator and the inter-electrode insulating film, wherein the first insulator is thicker than the inter-electrode insulating film, and the inter-electrode insulating film has a first slit on the first insulator.