Patent ID: 7879670

Claim:
A method of manufacturing a nonvolatile storage device having memory cell arrays in which memory cells are formed at cross points of a plurality of first wires extending in a first direction and a plurality of second wires extending in a second direction crossing the first direction and held between the first wires and the second wires, the method comprising: forming, in a memory cell array forming region above a processed film, a plurality of first columnar members having a substantial circular shape or a substantial regular polygonal shape in section arrayed at substantially equal intervals in the first direction and the second direction and arranged in a lattice shape, forming, concerning at least arrays as a part of arrays of the first columnar members in the first direction, second columnar members long in section having major axes longer than sections of the first columnar members outside of the memory cell array forming region such that the major axes are set in the first direction and the second columnar members continue to ends of the arrays, and forming, concerning at least arrays as a part of arrays of the first columnar members in the second direction, third columnar members long in section having major axes longer than the sections of the first columnar members outside of the memory cell array forming region such that the major axes are set in the second direction and the third columnar members continue to ends of the arrays; forming a sidewall film on sidewalls of the columnar members such that hollows are formed in a region surrounded by the columnar members; selectively removing the columnar members; embedding an embedding material in holes formed by removing the columnar members and the hollows to form embedded layers; arranging a resist end to traverse the embedded layers in the holes formed by removing the second and third columnar members, removing the embedded layers on an outer side of the resist end outside of the memory cell array forming region with lithography, and removing the sidewall film; and etching the processed film with the embedded layers as masks to form the memory cells after removing the embedded layers on the outer side and the sidewall film.