Patent ID: 7176515

Claim:
A semiconductor device comprising: a semiconductor substrate; an insulated gate type transistor formed in said semiconductor substrate; and an insulated gate type capacitor formed in said semiconductor substrate; said insulated gate type transistor including: a gate insulating film of the transistor selectively formed on said semiconductor substrate, a gate electrode of the transistor formed on said gate insulating film of the transistor, and source-drain regions formed to interpose a body region of the transistor provided under said gate electrode of the transistor in a surface of said semiconductor substrate; and said insulated gate type capacitor including: a gate insulating film of the capacitor selectively formed on said semiconductor substrate; a gate electrode of the capacitor formed on said gate insulating film of the capacitor; and extraction electrode regions formed to interpose a body region of the capacitor provided under said gate electrode of the capacitor in said surface of said semiconductor substrate, wherein said insulated gate type transistor has pocket regions of the transistor of a reverse conductivity type to that of said source-drain regions formed from said source-drain regions to a part of said body region of the transistor, said body region of the capacitor and said extraction electrode regions are formed to have the same conductivity type, and contact each other under said gate electrode of the capacitor, said source-drain regions include an extension portion of the transistor which has an upper layer portion protruded partially toward said body region side of the transistor, said extraction electrode regions include an extension portion of the capacitor which has an upper layer portion protruded partially toward said body region side of the capacitor, and said extension portion of the capacitor having a higher impurity concentration than that of said extension portion of the transistor.