Patent ID: 6909115
Filing Date: 2005-06-21
Classification: G02F,G09G,H01L

Abstract:
1. An electronic device having an active matrix display device comprising: a thin film transistor having an active layer comprising a crystalline semiconductor film over a substrate having an insulating surface, said active layer comprising at least a channel forming region, a source region, and a drain region, a first wiring electrically connected to the thin film transistor; a leveling film over said thin film transistor the leveling film having an opening to reach the first wiring; a pixel electrode connected to the first wiring through the opening; an alignment film on the pixel electrode; columnar spacers over a contact portion where the pixel electrode is connected to the first wiring through the opening; wherein said active layer comprises a plurality of crystals each extending in a source-drain direction and a boundary portion of said plurality of crystals, said boundary portion located in one of the source region and the drain region and extending in a channel width direction.