Patent ID: 6462723
Filing Date: 2002-10-08
Classification: G02F,G09G,H01L,H04N

Abstract:
An active matrix semiconductor display comprising:an active matrix circuit formed over a substrate; a signal line driving circuit formed over said substrate; and a scan line driving circuit formed over said substrate; wherein each of said signal line driving circuit and said scan line driving circuit has a plurality of thin film transistors, each of said plurality of thin film transistors comprising a source region, a drain region, a channel region between said source and drain region, and a gate electrode over said channel region; wherein a threshold control circuit for controlling thresholds of said plurality of thin film transistors is formed over said substrate, wherein a back gate electrode electrically connected to said threshold control circuit is provided to each of said plurality of thin film transistors, and wherein said back gate electrode is formed below said channel region with a gate insulation film interposed therebetween.