Patent ID: 8455868

Claim:
A semiconductor device comprising: a first transistor comprising: a first channel formation region comprising a semiconductor material other than an oxide semiconductor; a pair of impurity regions provided so as to sandwich the first channel formation region; a first gate insulating layer over the first channel formation region; a first gate electrode over the first gate insulating layer; and a first source electrode electrically connected to one of the pair of impurity regions and a first drain electrode electrically connected to the other one of the pair of impurity regions; an interlayer insulating film over the first transistor, a second transistor over the interlayer insulating film, comprising: a second source electrode and a second drain electrode; a second channel formation region comprising an oxide semiconductor material, and electrically connected to the second source electrode and the second drain electrode; a second gate insulating layer over the second channel formation region; and a second gate electrode over the second gate insulating layer; and a capacitor over the interlayer insulating film, comprising: one of the second source electrode and the second drain electrode; the second gate insulating layer; and a capacitor electrode over the second gate insulating layer.