Patent ID: 7535022

Claim:
A semiconductor device comprising: a first interconnection; a second interconnection; a first electrode over a substrate; a first insulating film over the first electrode; and a first semiconductor film over the first insulating film; a second electrode over the first semiconductor film; a second insulating film over the second electrode; a third electrode over the second insulating film; a third insulating film over the third electrode; and a second semiconductor film over the third insulating film; wherein each of the first semiconductor film and the second semiconductor film comprises plural channel-formed regions and plural impurity regions each in contact with corresponding one of the respective channel-formed regions; wherein one of two impurity regions out of the plural impurity regions in each of the first semiconductor film and the second semiconductor film is connected to the first interconnection and the other is connected to the second interconnection; and wherein the first electrode and the third electrode overlap with all the channel-formed regions and with all the impurity regions except the above-mentioned two impurity regions in each of the first semiconductor film and the second semiconductor film.