Patent ID: 8062939

Claim:
A manufacturing method of a semiconductor storage element comprising: forming a first frame body having a substantially rectangular planar shape on a substrate through a first insulating film by sidewall mask processing, a longitudinal direction of the first frame body being determined in a first direction within a surface of the substrate and each side of the first frame body being constituted of a semiconductor line pattern with a predetermined width; forming a second frame body having a substantially rectangular planar shape on the substrate by sidewall mask processing in such a manner that the second frame body crosses the first frame body to form a crisscross planar shape, a longitudinal direction of the second frame body being determined in a second direction perpendicular to the first direction within the surface of the substrate and each side of the second frame body being constituted of a line pattern with a predetermined width; forming a quantum dot serving as an electric storage layer at an intersection of the first frame body and the second frame body on the substrate through a tunnel insulating film by selectively removing the first frame body and the first insulating film using the second frame body as a mask; and removing the second frame body.