Patent ID: 6218219
Filing Date: 2001-04-17
Classification: G02F,H01L

Abstract:
A method of fabricating a semiconductor device including at least a thin film transistor and a storage capacitor, said method comprising the steps of:forming a gate wiring and a first electrode of the storage capacitor on an insulating surface;forming an insulating film covering the gate wiring and the first electrode;forming an amorphous semiconductor film on the insulating film;introducing a catalyst element for promoting crystallization of the amorphous semiconductor film thereto;heating the amorphous semiconductor film to form a crystalline semiconductor film;introducing an impurity including one element selected from at least group 15 to an entire surface of the crystalline semiconductor film to form a conductive semiconductor layer;gettering the catalyst element in the crystalline semiconductor film to the conductive semiconductor layer by a heating treatment;forming a first semiconductor film including a channel forming region of the thin film transistor by patterning the crystalline semiconductor film;forming a source wiring, a first conductive film covering at least a source region and a drain region of the thin film transistor over the first semiconductor film, and a second conductive film over the first electrode with the insulating film interposed therebetween; andforming the channel forming region of the thin film transistor by etching the first semiconductor film with the first conductive film as a mask,wherein the storage capacitor includes the first electrode, the insulating film and the second conductive film (Embodiment 14, FIG. 16).