Patent ID: 8362543
Filing Date: 2013-01-29
Classification: H01L

Abstract:
1. A nonvolatile semiconductor memory device comprising: a plurality of memory cells formed on a semiconductor substrate, wherein the memory cells each include a first insulating film; a floating gate formed on the semiconductor substrate with the first insulating film interposed in between; a control gate formed on the floating gate; and a second insulating film formed by an ALD (Atomic Layer Deposition) method having a first part and a second part, the first part formed in part of the space between the floating gate and the control gate, the second part formed on the side surfaces of the floating gate and the control gate along a word line, and the first part and the second part made of same material and formed without an interface, wherein the first part of the second insulating film comprises a first stacked layer film comprising a plurality of layers.