Patent ID: 6490014
Filing Date: 2002-12-03
Classification: G02F,H01L

Abstract:
An active matrix display device having a plurality of thin film transistors, comprising:a semiconductor film formed over a substrate, the semiconductor film comprising at least a channel forming region, a source region, and a drain region; at least one gate electrode adjacent to the semiconductor film with a gate insulating film interposed therebetween; source and drain electrodes connected to the source and drain regions, respectively; an interlayer insulating film formed over the source and drain electrodes, the interlayer insulating film comprising at least upper and lower insulating layers therein, said upper insulating layer having an opening; a conductive film formed on the interlayer insulating film and the opening of the upper insulating layer, the conductive film being light-interruptive and kept at a constant potential; and an auxiliary capacitor formed in a region of the opening and comprising the conductive film, the drain electrode and the lower insulating layer.