Patent ID: 7592207

Claim:
A method of manufacturing a light-emitting device comprising the steps of: forming a gate electrode by a droplet discharging method over a substrate; forming a gate insulating layer and a first semiconductor film over the gate electrode; forming a first mask by a droplet discharging method over the first semiconductor film; etching the semiconductor film and the gate insulating layer continuously with the first mask to form a patterned gate insulating film and a patterned first semiconductor film; removing the first mask; forming a protective layer over the patterned first semiconductor film after removing the first mask; forming a second semiconductor film including one conductivity type impurity over the patterned first semiconductor film and the protective layer; forming a source wiring and a drain wiring by a droplet discharging method over the second semiconductor film; and etching the second semiconductor film over the protective layer by the source wiring and the drain wiring as a second mask.