Patent ID: 8207533

Claim:
An active matrix display device comprising: a first insulating film formed over a substrate; a gate electrode formed on and in contact with the first insulating film; a gate insulating film over the gate electrode; a semiconductor layer over the gate electrode with the gate insulating film interposed therebetween, the semiconductor layer comprising a metal oxide comprising indium, gallium and zinc; a channel protective film comprising an inorganic insulating film on and in contact with a portion of the semiconductor layer; a first electrode and a second electrode, each in electrical contact with the semiconductor layer; a second insulating film formed over the first electrode, the second electrode, the channel protective film and the semiconductor layer; and a pixel electrode formed over the second insulating film and electrically connected to one of the first electrode and the second electrode, wherein the first insulating film comprises a material selected from the group consisting of silicon nitride and silicon nitride oxide, and wherein the second insulating film comprises a material selected from the group consisting of silicon oxide, silicon nitride, silicon nitride oxide and silicon oxynitride.