Patent ID: 8866233

Claim:
A semiconductor device comprising: a first transistor comprising: a channel region including a first semiconductor material; impurity regions between which the channel region is sandwiched; a first gate insulating layer over the channel region; a conductive layer including a first gate electrode over the first gate insulating layer; and a first source electrode and a first drain electrode electrically connected to the impurity regions; a second transistor comprising: a second source electrode and a second drain electrode wherein the conductive layer includes one of the second source electrode and the second drain electrode and wherein the other of the second source electrode and the second drain electrode is separated from the first gate electrode; a semiconductor layer including a second semiconductor material and electrically connected to the second source electrode and the second drain electrode; a second gate insulating layer over the semiconductor layer; and a second gate electrode over the second gate insulating layer; and an insulating layer in direct contact with the impurity regions and the semiconductor layer.