Patent ID: 7651930

Claim:
A method of manufacturing a semiconductor storage device, comprising: providing an opening portion in a plurality of positions in an insulating film formed on a silicon substrate; forming an amorphous silicon film on the insulating film, in which the opening portions are formed, and in the opening portions; annealing and subjecting the amorphous silicon film to solid-phase crystallization with the opening portions used as seeds, and thereby monocrystallizing the amorphous silicon film; performing ion implantation into a region including a seam portion generated by contact of growing ends from adjacent opening portions with the solid-phase crystallization, and amorphizing the region; annealing again and subjecting the amorphized region to solid-phase crystallization, and thereby monocrystallizing the amorphized region; and forming a memory cell array on a silicon single-crystal layer formed by the solid-phase crystallization and the second solid-phase crystallization.