Patent ID: 6992347

Claim:
A semiconductor storage device comprising: a memory cell transistor having a first diffused layer and a second diffused layer formed in a semiconductor substrate, and a gate electrode formed over the semiconductor substrate between the first diffused layer and the second diffused layer with a gate insulation film interposd therebetween; an insulation film covering a top of the memory cell transistor and having a through-hole opened on the first diffused layer and an opening surrounding the through-hole, the opening having a larger diameter than the through-hole and not reaching the semiconductor substrate; a capacitor storage electrode formed on an inside wall and a bottom of the opening and electrically connected to the first diffused layer, a thickness of the capacitor storage electrode being thinner than a depth of the opening; a capacitor dielectric film formed covering the capacitor storage electrode; and a capacitor opposed electrode formed coving the capacitor dielectric film.