Patent ID: 9214234
Filing Date: 2015-12-15
Classification: G11C,H01L

Abstract:
1. A nonvolatile semiconductor memory device comprising a first memory cell string stacked body including a first memory cell string having first memory cell transistors serially connected in a first direction above a semiconductor substrate, and a second memory cell string having second memory cell transistors serially connected in the first direction below a first channel semiconductor film, and one of the first memory cell transistors and one of the second memory cell transistors sharing with a first control gate electrode, wherein the first control gate electrode is formed so as to cover an upper surface of a first charge storage layer and at least a part of a side surface in a second direction intersecting the first direction via a first insulating film in the one of the first memory cell transistors, and the first control gate electrode is formed so as to cover only a lower surface of a second charge storage layer via a second insulating film in the one of the second memory cell transistors.