Patent ID: 6965124

Claim:
A light-emitting device comprising: a TFT comprising a source region and a drain region and a channel region provided between said source region and said drain region, said source region and said drain region and said channel region provided over a substrate; a light-emitting element over the substrate, the light-emitting element comprising a first electrode, a light emitting layer comprising an organic compound and a second electrode, said light emitting layer provided over said first electrode, and said second electrode provided over said light emitting layer; a drain wiring connected to one of said source region and said drain region; an electrode connection wiring connected to said drain wiring and connected to said first electrode; an insulating film provided over the electrode connection wiring, said drain wiring provided over the electrode connection wiring and over the insulating film; and a separation portion formed over the drain wiring, the separation portion comprising a material that provides an etching rate smaller than that of a material forming the drain wiring.