Method for manufacturing a non-volatile semiconductor memory device

摘要

According to one embodiment, a non-volatile semiconductor memory device includes: a semiconductor substrate; a plurality of first lines; a plurality of second lines; and a plurality of non-volatile memory cells arranged at positions where the plurality of first lines intersect with the plurality of second lines, wherein each of the plurality of non-volatile memory cells includes a resistance change element and a rectifying element connected in series to the resistance change element, and a resistance change film continuously extending over the plurality of second lines is arranged between the plurality of first lines and the plurality of second lines, and the resistance change element includes a portion where the first line intersect with the second line in the resistance change film.

主权项

1. A method of manufacturing a non-volatile semiconductor memory device comprising:
forming a stacked structure on a semiconductor substrate, the stacked structure having a structure where a first layer and a second layer are alternately stacked plurality of times; forming a first mask pattern on the stacked structure, the first mask pattern having a plurality of first line patterns being located parallel with each other; dividing the stacked structure into a plurality of fin-shaped members where an insulation film and a conductive film are alternately stacked plurality of times, by selectively etching a region exposed by the first mask pattern in the stacked structure to form the plurality of fin-shaped members and by forming recesses in at least one side surface of the formed plurality of fin-shaped members; forming a resistance change film on an exposed side surface of the conductive film of each of the plurality of fin-shaped members; embedding a conductive material between the plurality of fin-shaped members on which the resistance change film is formed; forming a second mask pattern on the plurality of fin-shaped members on which the resistance change film is formed and on the embedded conductive material, the second mask pattern having a plurality of second line patterns, each of the plurality of second line patterns extending in a direction intersecting with the fin-shaped members and being arranged side by side each other; and selectively etching a region exposed by the second mask pattern in the embedded conductive material so as to separate the embedded conductive material into a plurality of pillar members, each of the plurality of pillar members extending approximately vertical to the surface of the semiconductor substrate.