Vertical MISFETs are formed over drive MISFETs and transfer MISFETs. The
vertical MISFETs comprise rectangular pillar laminated bodies each formed
by laminating a lower semiconductor layer (drain), an intermediate
semiconductor layer, and an upper semiconductor layer (source), and gate
electrodes formed on corresponding side walls of the laminated bodies
with gate insulating films interposed therebetween. In each vertical
MISFET, the lower semiconductor layer constitutes a drain, the
intermediate semiconductor layer constitutes a substrate (channel
region), and the upper semiconductor layer constitutes a source. The
lower semiconductor layer, the intermediate semiconductor layer and the
upper semiconductor layer are each comprised of a silicon film. The lower
semiconductor layer and the upper semiconductor layer are doped with a p
type and constituted of a p type silicon film.