Patent ID: 8551838

Claim:
A manufacturing method of a nonvolatile semiconductor memory device comprising: forming diffusion areas having impurities on a semiconductor substrate; forming a plurality of first insulation films and conductive layers in turn above the semiconductor substrate; forming a plurality of holes above the diffusion areas in the plurality of first insulation films and conductive layers; forming a second insulation film on the surface of the holes; etching the second insulation film at the bottom of the holes; and forming a plurality of pillar shaped semiconductors in the holes, respectively, wherein: a plurality of memory strings include at least one memory string having a plurality of electrically programmable memory cells connected in series, the memory string including the pillar shaped semiconductor, the plurality of first insulation films and a first to nth electrodes formed by the plurality of conductive layers, each of the memory strings comprises a first transistor connected to one end of the memory string a second transistor connected to the other end of the memory string, and the gate electrode of the first transistor of the memory string and the gate electrode of the first transistor of the other memory string are formed by the same conductive layer.