Patent ID: 7145173

Claim:
A semiconductor device including a DRAM, said DRAM comprising: a plurality of first thin film transistors arranged in a matrix form over a substrate having an insulating surface; a driver circuit comprising a plurality of second thin film transistors formed over said substrate for driving said first thin film transistors, each of said first and second thin film transistors having a channel forming region comprising crystalline silicon; an interlayer insulating film formed over said first thin film transistors and said second thin film transistors: a plurality of electrodes formed on said interlayer insulating film and electrically connected to said first thin film transistors at one of source or drain thereof; a plurality of wirings formed on said interlayer insulating film and electrically connected to said first thin film transistors at the other one of the source or drain thereof; and a semiconductor chip formed over the substrate, wherein all of said first and second thin film transistors are p-channel type thin film transistors.