Patent ID: 8759897

Claim:
A nonvolatile semiconductor memory device, comprising: a plurality of semiconductor layers, each of the semiconductor layers extending in a first direction, the semiconductor layers being apart from each other in at least one of a second direction and a third direction, the second direction being perpendicular to the first direction, the third direction being perpendicular to the first direction and crossing the second direction, a plurality of electrode films; a plurality of inter-electrode insulating films, the electrode films being provided alternately in the first direction with the inter-electrode insulating films; a memory layer provided between at least one of the electrode films and at least one of the semiconductor layers; an inner insulating film provided between the memory layer and the at least one of the semiconductor layers; an outer insulating film provided between the memory layer and the at least one of the electrode films; and a cap insulating film provided between the outer insulating film and the at least one of the electrode films, the cap insulating film having a relative dielectric constant higher than a relative dielectric constant of the outer insulating film.