A semiconductor device having a substrate having an insulating surface; at least first and second semiconductor islands formed over the substrate where each of the semiconductor islands has a channel region and a pair of impurity regions; an insulating film formed over the substrate, the insulating film...http://www.google.de/patents/US7253440?utm_source=gb-gplus-sharePatent US7253440 - Semiconductor device having at least first and second thin film transistors