Patent ID: 8222075
Filing Date: 2012-07-17
Classification: G11C,H01L

Abstract:
1. A method of manufacturing a nonvolatile semiconductor memory device, comprising: forming a plurality of first word lines on a first insulating film; forming a second insulating film to cover the first word lines; forming a plurality of first openings to expose the first word lines in the second insulating film, the first openings corresponding to cross points of the first word lines and a plurality of bit lines formed later; forming a first conduction-type first semiconductor layer in each of the first openings; forming a first intrinsic semiconductor layer on the first semiconductor layer in each of the first openings; forming a second conduction-type second semiconductor layer on the first intrinsic semiconductor layer in each of the first openings; forming a first variable resistance film on the entire surface of the second insulating film, the first variable resistance film being connected to the second semiconductor layer in each of the first openings; and forming the plurality of bit lines crossing the first word lines on the first variable resistance film.