Patent ID: 6878584

Claim:
A method of manufacturing a flat panel display device, comprising: providing an insulating substrate, the insulating substrate comprising a thin film transistor region and a capacitor region; forming a semiconductor layer over the thin film transistor region; forming a gate insulating layer over a whole surface of the substrate to cover the semiconductor layer; forming a gate electrode and a first capacitor electrode on the gate insulating layer, the gate electrode formed over the thin film transistor region, the first capacitor electrode formed over the capacitor region; forming an interlayer insulating layer over a whole surface of the substrate to cover the gate electrode and the first capacitor electrode; and etching the interlayer insulating layer using a half-tone mask, a portion of the interlayer insulating layer over the thin film transistor region being etched to expose end portions of the semiconductor layer and a portion of the interlayer insulating layer over the capacitor region being etched to a predetermined thickness.