Patent ID: 7696514
Filing Date: 2010-04-13
Classification: G02F,G09G,H01L

Abstract:
1. An active matrix display device comprising: a first thin film transistor over a first substrate having an insulating surface, said first thin film transistor comprising at least a channel forming region, a source region, and a drain region, a first wiring electrically connected to the first thin film transistor; a driver circuit comprising a second thin film transistor over the first substrate; a leveling film over said first thin film transistor, said second thin film transistor, and the first wiring, the leveling film having an opening to reach the first wiring; a pixel electrode formed over the leveling film and connected to the first wiring through the opening of the leveling film; an alignment film on the pixel electrode; a first column-like spacer over the alignment film where the first column-like spacer overlaps the opening of the leveling film at least partly; a second column-like spacer over the driver circuit and the leveling film; a second substrate opposed to the first substrate with said first and second column-like spacers interposed therebetween; and a liquid crystal between the first and second substrates, wherein the liquid crystal is disposed over the pixel electrode and the driver circuit.