Patent ID: 7718463

Claim:
A manufacturing method of an EL display device having an inverted staggered TFT comprising: forming a gate electrode over a substrate; forming a gate insulating film over the gate electrode; forming a microcrystalline semiconductor film including a channel forming region over the gate insulating film by plasma CVD using a reactive gas including SiF4 and a diluent gas including H 2 ; forming a channel stopper over the channel forming region in the microcrystalline semiconductor film; forming at least two n+ layers over the microcrystalline semiconductor film and at least two metal layers over the at least two n+ layers; forming a passivation film over the inverted staggered TFT; forming a planarized film over the passivation film; forming a source electrode and a drain electrode electrically connected to the two n+ layers over the planarized film; forming a first electrode electrically connected to one of the source electrode and the drain electrode; forming a light emitting layer over the first electrode; and forming a second electrode over the light emitting layer.