Patent ID: 7977680

Claim:
A light emitting device comprising: a metal substrate; a first insulating film formed over the metal substrate; a first thin film transistor and a second thin film transistor formed over the first insulating film, each of the first thin film transistor and the second thin film transistor comprising a semiconductor layer and a gate electrode with a gate insulating film interposed therebetween; a second insulating film having a first contact hole and a second contact hole formed over the first thin film transistor and the second thin film transistor; a first wiring formed over the first insulating film and second insulating film, the first wiring being electrically connected to the first thin film transistor through the first contact hole and being in contact with a portion of the first insulating film; a second wiring formed over the second insulating film and electrically connected to the second thin film transistor through the second contact hole; a third insulating film formed over the second insulating film, the first wiring, and the second wiring; and an EL element formed over the third insulating film, wherein a portion of the second insulating film is provided between the semiconductor layer of the first thin film transistor and a portion of the first wiring.