SEMICONDUCTOR DEVICE AND SEMICONDUCTOR STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor device or a semiconductor storage device for holding data for a longer period of time.

SOLUTION: A semiconductor device comprises: a first semiconductor layer 152a including a pair of impurity regions; a second semiconductor layer 152b provided apart from the first semiconductor layer and formed of the same material as the first semiconductor layer; a first insulation layer 153 provided on the first and second semiconductor layers; a first conductive layer 154 overlapping with the first semiconductor layer via the first insulation layer 153; a third semiconductor layer 156 overlapping with the first conductive layer via the first insulation layer 153 and formed of a different material from the first semiconductor layer; a second conductive layer 157b electrically connected to the first conductive layer and the third semiconductor layer; a third conductive layer 157a electrically connected to the third semiconductor layer 156 and formed of the same material as the second conductive layer; a second insulation layer 158 provided on the third semiconductor layer, the second conductive layer, and the third conductive layer; and a fourth conductive layer 159 overlapping with the third semiconductor layer via the second insulation layer.

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